/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/array-examples/standard_init4_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 17:35:20,674 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 17:35:20,675 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 17:35:20,694 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 17:35:20,700 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 17:35:20,701 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 17:35:20,702 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 17:35:20,702 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 17:35:20,703 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 17:35:20,703 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 17:35:20,705 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 17:35:20,706 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 17:35:20,707 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 17:35:20,708 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 17:35:20,708 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 17:35:20,709 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 17:35:20,710 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 17:35:20,715 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 17:35:20,715 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 17:35:20,716 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 17:35:20,716 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-01-31 17:35:20,733 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 17:35:20,733 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 17:35:20,734 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 17:35:20,734 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 17:35:20,735 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 17:35:20,735 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 17:35:20,735 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 17:35:20,735 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 17:35:20,735 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 17:35:20,735 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 17:35:20,735 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 17:35:20,736 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 17:35:20,736 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 17:35:20,736 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 17:35:20,736 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 17:35:20,736 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 17:35:20,736 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 17:35:20,736 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 17:35:20,736 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 17:35:20,737 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 17:35:20,737 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 17:35:20,737 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 17:35:20,737 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 17:35:20,737 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 17:35:20,886 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 17:35:20,906 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 17:35:20,907 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 17:35:20,908 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 17:35:20,919 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 17:35:20,920 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init4_ground-2.i [2022-01-31 17:35:20,963 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/614975041/44700f00be62461a879fd6c4194e2203/FLAGa5e6b2e27 [2022-01-31 17:35:21,312 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 17:35:21,313 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init4_ground-2.i [2022-01-31 17:35:21,316 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/614975041/44700f00be62461a879fd6c4194e2203/FLAGa5e6b2e27 [2022-01-31 17:35:21,324 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/614975041/44700f00be62461a879fd6c4194e2203 [2022-01-31 17:35:21,325 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 17:35:21,326 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 17:35:21,331 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 17:35:21,331 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 17:35:21,333 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 17:35:21,334 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:35:21" (1/1) ... [2022-01-31 17:35:21,335 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13784e99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:35:21, skipping insertion in model container [2022-01-31 17:35:21,335 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:35:21" (1/1) ... [2022-01-31 17:35:21,339 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 17:35:21,351 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 17:35:21,484 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init4_ground-2.i[816,829] [2022-01-31 17:35:21,500 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 17:35:21,504 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 17:35:21,512 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init4_ground-2.i[816,829] [2022-01-31 17:35:21,518 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 17:35:21,526 INFO L208 MainTranslator]: Completed translation [2022-01-31 17:35:21,527 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:35:21 WrapperNode [2022-01-31 17:35:21,527 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 17:35:21,528 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 17:35:21,528 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 17:35:21,528 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 17:35:21,535 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:35:21" (1/1) ... [2022-01-31 17:35:21,536 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:35:21" (1/1) ... [2022-01-31 17:35:21,541 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:35:21" (1/1) ... [2022-01-31 17:35:21,542 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:35:21" (1/1) ... [2022-01-31 17:35:21,553 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:35:21" (1/1) ... [2022-01-31 17:35:21,556 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:35:21" (1/1) ... [2022-01-31 17:35:21,556 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:35:21" (1/1) ... [2022-01-31 17:35:21,557 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 17:35:21,558 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 17:35:21,558 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 17:35:21,558 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 17:35:21,559 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:35:21" (1/1) ... [2022-01-31 17:35:21,566 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 17:35:21,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 17:35:21,584 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-31 17:35:21,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-31 17:35:21,607 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 17:35:21,607 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 17:35:21,607 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 17:35:21,607 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 17:35:21,607 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 17:35:21,608 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 17:35:21,608 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 17:35:21,608 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 17:35:21,609 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 17:35:21,609 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 17:35:21,610 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 17:35:21,610 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 17:35:21,610 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 17:35:21,610 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 17:35:21,611 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 17:35:21,611 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 17:35:21,611 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 17:35:21,611 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 17:35:21,611 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 17:35:21,612 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 17:35:21,672 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 17:35:21,673 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 17:35:21,777 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 17:35:21,781 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 17:35:21,781 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-01-31 17:35:21,782 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:35:21 BoogieIcfgContainer [2022-01-31 17:35:21,782 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 17:35:21,783 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 17:35:21,783 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 17:35:21,788 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 17:35:21,788 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 05:35:21" (1/3) ... [2022-01-31 17:35:21,789 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40804aac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:35:21, skipping insertion in model container [2022-01-31 17:35:21,789 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:35:21" (2/3) ... [2022-01-31 17:35:21,789 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40804aac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:35:21, skipping insertion in model container [2022-01-31 17:35:21,789 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:35:21" (3/3) ... [2022-01-31 17:35:21,790 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_init4_ground-2.i [2022-01-31 17:35:21,793 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 17:35:21,793 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 17:35:21,817 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 17:35:21,821 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=JORDAN [2022-01-31 17:35:21,822 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 17:35:21,829 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:35:21,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-31 17:35:21,834 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:35:21,834 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:35:21,834 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:35:21,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:35:21,837 INFO L85 PathProgramCache]: Analyzing trace with hash 2137969439, now seen corresponding path program 1 times [2022-01-31 17:35:21,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:35:21,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [841816346] [2022-01-31 17:35:21,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:35:21,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:35:21,881 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:35:21,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:21,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:35:21,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:21,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:35:21,971 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:35:21,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [841816346] [2022-01-31 17:35:21,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [841816346] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:35:21,972 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:35:21,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 17:35:21,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314100582] [2022-01-31 17:35:21,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:35:21,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 17:35:21,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:35:21,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 17:35:21,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 17:35:21,994 INFO L87 Difference]: Start difference. First operand has 29 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:22,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:35:22,026 INFO L93 Difference]: Finished difference Result 51 states and 70 transitions. [2022-01-31 17:35:22,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 17:35:22,028 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-01-31 17:35:22,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:35:22,031 INFO L225 Difference]: With dead ends: 51 [2022-01-31 17:35:22,031 INFO L226 Difference]: Without dead ends: 24 [2022-01-31 17:35:22,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 17:35:22,035 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 24 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:35:22,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 35 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:35:22,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-01-31 17:35:22,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-01-31 17:35:22,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:35:22,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-01-31 17:35:22,059 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 19 [2022-01-31 17:35:22,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:35:22,059 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-01-31 17:35:22,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:22,060 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-01-31 17:35:22,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-31 17:35:22,060 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:35:22,060 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:35:22,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 17:35:22,061 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:35:22,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:35:22,062 INFO L85 PathProgramCache]: Analyzing trace with hash -983385829, now seen corresponding path program 1 times [2022-01-31 17:35:22,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:35:22,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [588013681] [2022-01-31 17:35:22,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:35:22,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:35:22,064 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:35:22,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:22,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:35:22,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:22,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:35:22,104 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:35:22,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [588013681] [2022-01-31 17:35:22,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [588013681] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:35:22,105 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:35:22,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 17:35:22,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552743159] [2022-01-31 17:35:22,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:35:22,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 17:35:22,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:35:22,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 17:35:22,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 17:35:22,106 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:22,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:35:22,164 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2022-01-31 17:35:22,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 17:35:22,165 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-01-31 17:35:22,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:35:22,165 INFO L225 Difference]: With dead ends: 45 [2022-01-31 17:35:22,166 INFO L226 Difference]: Without dead ends: 28 [2022-01-31 17:35:22,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 17:35:22,167 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:35:22,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 30 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:35:22,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-01-31 17:35:22,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-01-31 17:35:22,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:35:22,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-01-31 17:35:22,173 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 19 [2022-01-31 17:35:22,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:35:22,173 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-01-31 17:35:22,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:22,173 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-01-31 17:35:22,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-31 17:35:22,174 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:35:22,174 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:35:22,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 17:35:22,174 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:35:22,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:35:22,174 INFO L85 PathProgramCache]: Analyzing trace with hash 133010521, now seen corresponding path program 1 times [2022-01-31 17:35:22,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:35:22,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [473897087] [2022-01-31 17:35:22,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:35:22,187 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:35:22,188 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:35:22,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:35:22,189 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:35:22,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:22,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:35:22,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:22,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:35:22,251 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:35:22,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [473897087] [2022-01-31 17:35:22,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [473897087] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:35:22,251 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:35:22,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 17:35:22,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261134123] [2022-01-31 17:35:22,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:35:22,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 17:35:22,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:35:22,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 17:35:22,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 17:35:22,252 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:22,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:35:22,338 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2022-01-31 17:35:22,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 17:35:22,339 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-01-31 17:35:22,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:35:22,341 INFO L225 Difference]: With dead ends: 52 [2022-01-31 17:35:22,341 INFO L226 Difference]: Without dead ends: 32 [2022-01-31 17:35:22,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-31 17:35:22,343 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:35:22,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 30 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:35:22,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-01-31 17:35:22,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-01-31 17:35:22,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:35:22,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2022-01-31 17:35:22,351 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 23 [2022-01-31 17:35:22,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:35:22,351 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2022-01-31 17:35:22,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:22,351 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2022-01-31 17:35:22,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-31 17:35:22,352 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:35:22,352 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:35:22,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 17:35:22,352 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:35:22,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:35:22,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1832747173, now seen corresponding path program 2 times [2022-01-31 17:35:22,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:35:22,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1341024506] [2022-01-31 17:35:22,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:35:22,354 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:35:22,354 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:35:22,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:35:22,355 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:35:22,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:22,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:35:22,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:22,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:35:22,442 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:35:22,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1341024506] [2022-01-31 17:35:22,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1341024506] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:35:22,443 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:35:22,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 17:35:22,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329759459] [2022-01-31 17:35:22,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:35:22,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 17:35:22,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:35:22,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 17:35:22,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 17:35:22,446 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:22,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:35:22,525 INFO L93 Difference]: Finished difference Result 59 states and 70 transitions. [2022-01-31 17:35:22,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 17:35:22,525 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-01-31 17:35:22,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:35:22,527 INFO L225 Difference]: With dead ends: 59 [2022-01-31 17:35:22,527 INFO L226 Difference]: Without dead ends: 36 [2022-01-31 17:35:22,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-31 17:35:22,529 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:35:22,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 35 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:35:22,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-01-31 17:35:22,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-01-31 17:35:22,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:35:22,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2022-01-31 17:35:22,534 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 27 [2022-01-31 17:35:22,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:35:22,534 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2022-01-31 17:35:22,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:22,535 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2022-01-31 17:35:22,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-31 17:35:22,535 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:35:22,535 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:35:22,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 17:35:22,535 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:35:22,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:35:22,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1879839641, now seen corresponding path program 3 times [2022-01-31 17:35:22,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:35:22,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1237679050] [2022-01-31 17:35:22,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:35:22,537 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:35:22,537 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:35:22,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:35:22,538 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:35:22,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:22,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:35:22,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:22,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:35:22,631 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:35:22,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1237679050] [2022-01-31 17:35:22,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1237679050] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:35:22,631 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:35:22,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 17:35:22,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416106112] [2022-01-31 17:35:22,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:35:22,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 17:35:22,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:35:22,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 17:35:22,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-31 17:35:22,633 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:22,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:35:22,720 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2022-01-31 17:35:22,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 17:35:22,721 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-01-31 17:35:22,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:35:22,721 INFO L225 Difference]: With dead ends: 66 [2022-01-31 17:35:22,721 INFO L226 Difference]: Without dead ends: 40 [2022-01-31 17:35:22,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-01-31 17:35:22,722 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:35:22,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 35 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:35:22,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-01-31 17:35:22,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-01-31 17:35:22,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 34 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:35:22,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2022-01-31 17:35:22,727 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 31 [2022-01-31 17:35:22,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:35:22,728 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2022-01-31 17:35:22,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:22,728 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2022-01-31 17:35:22,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-31 17:35:22,729 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:35:22,729 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:35:22,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 17:35:22,729 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:35:22,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:35:22,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1536248421, now seen corresponding path program 4 times [2022-01-31 17:35:22,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:35:22,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1576594935] [2022-01-31 17:35:22,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:35:22,732 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:35:22,732 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:35:22,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:35:22,733 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:35:22,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:22,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:35:22,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:22,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:35:22,816 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:35:22,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1576594935] [2022-01-31 17:35:22,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1576594935] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:35:22,816 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:35:22,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 17:35:22,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499324817] [2022-01-31 17:35:22,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:35:22,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 17:35:22,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:35:22,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 17:35:22,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 17:35:22,817 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:22,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:35:22,902 INFO L93 Difference]: Finished difference Result 73 states and 84 transitions. [2022-01-31 17:35:22,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 17:35:22,903 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-01-31 17:35:22,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:35:22,904 INFO L225 Difference]: With dead ends: 73 [2022-01-31 17:35:22,904 INFO L226 Difference]: Without dead ends: 44 [2022-01-31 17:35:22,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2022-01-31 17:35:22,908 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:35:22,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 30 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:35:22,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-01-31 17:35:22,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-01-31 17:35:22,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 38 states have (on average 1.131578947368421) internal successors, (43), 38 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:35:22,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2022-01-31 17:35:22,923 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 35 [2022-01-31 17:35:22,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:35:22,923 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2022-01-31 17:35:22,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:22,923 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2022-01-31 17:35:22,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-31 17:35:22,924 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:35:22,924 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:35:22,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 17:35:22,924 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:35:22,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:35:22,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1173855527, now seen corresponding path program 5 times [2022-01-31 17:35:22,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:35:22,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2121927967] [2022-01-31 17:35:22,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:35:22,926 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:35:22,926 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:35:22,926 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:35:22,927 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:35:22,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:23,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:35:23,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:23,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:35:23,024 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:35:23,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2121927967] [2022-01-31 17:35:23,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2121927967] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:35:23,025 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:35:23,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 17:35:23,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262785032] [2022-01-31 17:35:23,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:35:23,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 17:35:23,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:35:23,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 17:35:23,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-31 17:35:23,027 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:23,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:35:23,138 INFO L93 Difference]: Finished difference Result 80 states and 91 transitions. [2022-01-31 17:35:23,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 17:35:23,139 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-01-31 17:35:23,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:35:23,139 INFO L225 Difference]: With dead ends: 80 [2022-01-31 17:35:23,139 INFO L226 Difference]: Without dead ends: 48 [2022-01-31 17:35:23,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2022-01-31 17:35:23,140 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:35:23,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 30 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:35:23,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-01-31 17:35:23,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-01-31 17:35:23,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 42 states have (on average 1.119047619047619) internal successors, (47), 42 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:35:23,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2022-01-31 17:35:23,145 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 39 [2022-01-31 17:35:23,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:35:23,145 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2022-01-31 17:35:23,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:23,145 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2022-01-31 17:35:23,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-31 17:35:23,146 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:35:23,146 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:35:23,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 17:35:23,146 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:35:23,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:35:23,146 INFO L85 PathProgramCache]: Analyzing trace with hash -459318309, now seen corresponding path program 6 times [2022-01-31 17:35:23,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:35:23,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1238403145] [2022-01-31 17:35:23,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:35:23,148 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:35:23,148 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:35:23,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:35:23,149 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:35:23,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:23,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:35:23,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:23,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:35:23,226 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:35:23,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1238403145] [2022-01-31 17:35:23,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1238403145] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:35:23,239 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:35:23,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 17:35:23,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821770701] [2022-01-31 17:35:23,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:35:23,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 17:35:23,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:35:23,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 17:35:23,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-01-31 17:35:23,240 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:23,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:35:23,355 INFO L93 Difference]: Finished difference Result 87 states and 98 transitions. [2022-01-31 17:35:23,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 17:35:23,355 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2022-01-31 17:35:23,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:35:23,356 INFO L225 Difference]: With dead ends: 87 [2022-01-31 17:35:23,356 INFO L226 Difference]: Without dead ends: 52 [2022-01-31 17:35:23,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2022-01-31 17:35:23,357 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:35:23,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 35 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:35:23,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-01-31 17:35:23,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-01-31 17:35:23,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 46 states have (on average 1.108695652173913) internal successors, (51), 46 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:35:23,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2022-01-31 17:35:23,361 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 43 [2022-01-31 17:35:23,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:35:23,361 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2022-01-31 17:35:23,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:23,361 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2022-01-31 17:35:23,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-31 17:35:23,362 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:35:23,362 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:35:23,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 17:35:23,362 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:35:23,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:35:23,363 INFO L85 PathProgramCache]: Analyzing trace with hash 755663385, now seen corresponding path program 7 times [2022-01-31 17:35:23,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:35:23,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [240490427] [2022-01-31 17:35:23,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:35:23,364 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:35:23,364 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:35:23,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:35:23,365 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:35:23,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:23,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:35:23,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:23,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:35:23,437 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:35:23,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [240490427] [2022-01-31 17:35:23,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [240490427] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:35:23,437 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:35:23,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 17:35:23,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477353390] [2022-01-31 17:35:23,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:35:23,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 17:35:23,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:35:23,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 17:35:23,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2022-01-31 17:35:23,438 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:23,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:35:23,561 INFO L93 Difference]: Finished difference Result 94 states and 105 transitions. [2022-01-31 17:35:23,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 17:35:23,561 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-01-31 17:35:23,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:35:23,562 INFO L225 Difference]: With dead ends: 94 [2022-01-31 17:35:23,562 INFO L226 Difference]: Without dead ends: 56 [2022-01-31 17:35:23,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2022-01-31 17:35:23,563 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:35:23,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 30 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:35:23,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-01-31 17:35:23,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-01-31 17:35:23,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 50 states have (on average 1.1) internal successors, (55), 50 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:35:23,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2022-01-31 17:35:23,567 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 47 [2022-01-31 17:35:23,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:35:23,568 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2022-01-31 17:35:23,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:23,568 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2022-01-31 17:35:23,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-31 17:35:23,568 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:35:23,568 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:35:23,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 17:35:23,569 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:35:23,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:35:23,569 INFO L85 PathProgramCache]: Analyzing trace with hash -561221093, now seen corresponding path program 8 times [2022-01-31 17:35:23,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:35:23,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [325721543] [2022-01-31 17:35:23,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:35:23,570 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:35:23,570 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:35:23,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:35:23,571 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:35:23,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:23,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:35:23,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:23,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:35:23,697 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:35:23,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [325721543] [2022-01-31 17:35:23,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [325721543] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:35:23,697 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:35:23,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 17:35:23,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608320613] [2022-01-31 17:35:23,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:35:23,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 17:35:23,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:35:23,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 17:35:23,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-01-31 17:35:23,698 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:23,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:35:23,884 INFO L93 Difference]: Finished difference Result 101 states and 112 transitions. [2022-01-31 17:35:23,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 17:35:23,885 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-01-31 17:35:23,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:35:23,886 INFO L225 Difference]: With dead ends: 101 [2022-01-31 17:35:23,886 INFO L226 Difference]: Without dead ends: 60 [2022-01-31 17:35:23,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2022-01-31 17:35:23,889 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:35:23,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 50 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:35:23,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-01-31 17:35:23,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-01-31 17:35:23,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 54 states have (on average 1.0925925925925926) internal successors, (59), 54 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:35:23,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2022-01-31 17:35:23,904 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 51 [2022-01-31 17:35:23,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:35:23,905 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2022-01-31 17:35:23,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:23,906 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2022-01-31 17:35:23,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-31 17:35:23,910 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:35:23,910 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:35:23,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 17:35:23,910 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:35:23,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:35:23,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1086688935, now seen corresponding path program 9 times [2022-01-31 17:35:23,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:35:23,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [219152340] [2022-01-31 17:35:23,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:35:23,912 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:35:23,912 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:35:23,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:35:23,913 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:35:23,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:24,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:35:24,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:24,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:35:24,030 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:35:24,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [219152340] [2022-01-31 17:35:24,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [219152340] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:35:24,030 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:35:24,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 17:35:24,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688780399] [2022-01-31 17:35:24,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:35:24,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 17:35:24,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:35:24,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 17:35:24,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2022-01-31 17:35:24,031 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:24,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:35:24,199 INFO L93 Difference]: Finished difference Result 108 states and 119 transitions. [2022-01-31 17:35:24,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 17:35:24,199 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-01-31 17:35:24,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:35:24,200 INFO L225 Difference]: With dead ends: 108 [2022-01-31 17:35:24,200 INFO L226 Difference]: Without dead ends: 64 [2022-01-31 17:35:24,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2022-01-31 17:35:24,201 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:35:24,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 55 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:35:24,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-01-31 17:35:24,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-01-31 17:35:24,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 58 states have (on average 1.0862068965517242) internal successors, (63), 58 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:35:24,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2022-01-31 17:35:24,207 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 55 [2022-01-31 17:35:24,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:35:24,207 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2022-01-31 17:35:24,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:24,207 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2022-01-31 17:35:24,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-31 17:35:24,209 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:35:24,209 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:35:24,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 17:35:24,209 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:35:24,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:35:24,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1047394395, now seen corresponding path program 10 times [2022-01-31 17:35:24,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:35:24,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [65758437] [2022-01-31 17:35:24,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:35:24,211 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:35:24,211 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:35:24,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:35:24,212 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:35:24,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:24,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:35:24,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:24,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:35:24,319 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:35:24,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [65758437] [2022-01-31 17:35:24,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [65758437] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:35:24,319 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:35:24,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 17:35:24,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908642609] [2022-01-31 17:35:24,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:35:24,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 17:35:24,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:35:24,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 17:35:24,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-01-31 17:35:24,321 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:24,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:35:24,488 INFO L93 Difference]: Finished difference Result 115 states and 126 transitions. [2022-01-31 17:35:24,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 17:35:24,488 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-01-31 17:35:24,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:35:24,489 INFO L225 Difference]: With dead ends: 115 [2022-01-31 17:35:24,489 INFO L226 Difference]: Without dead ends: 68 [2022-01-31 17:35:24,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2022-01-31 17:35:24,490 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:35:24,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 40 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:35:24,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-01-31 17:35:24,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-01-31 17:35:24,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 62 states have (on average 1.0806451612903225) internal successors, (67), 62 states have internal predecessors, (67), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:35:24,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2022-01-31 17:35:24,493 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 59 [2022-01-31 17:35:24,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:35:24,494 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2022-01-31 17:35:24,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:24,494 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2022-01-31 17:35:24,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 17:35:24,494 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:35:24,494 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:35:24,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-31 17:35:24,494 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:35:24,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:35:24,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1782566759, now seen corresponding path program 11 times [2022-01-31 17:35:24,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:35:24,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1484759757] [2022-01-31 17:35:24,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:35:24,496 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:35:24,496 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:35:24,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:35:24,497 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:35:24,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:24,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:35:24,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:24,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:35:24,623 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:35:24,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1484759757] [2022-01-31 17:35:24,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1484759757] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:35:24,623 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:35:24,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 17:35:24,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263010270] [2022-01-31 17:35:24,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:35:24,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 17:35:24,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:35:24,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 17:35:24,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2022-01-31 17:35:24,624 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:24,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:35:24,806 INFO L93 Difference]: Finished difference Result 122 states and 133 transitions. [2022-01-31 17:35:24,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 17:35:24,806 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2022-01-31 17:35:24,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:35:24,807 INFO L225 Difference]: With dead ends: 122 [2022-01-31 17:35:24,807 INFO L226 Difference]: Without dead ends: 72 [2022-01-31 17:35:24,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2022-01-31 17:35:24,808 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:35:24,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 30 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:35:24,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-01-31 17:35:24,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2022-01-31 17:35:24,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 66 states have (on average 1.0757575757575757) internal successors, (71), 66 states have internal predecessors, (71), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:35:24,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2022-01-31 17:35:24,812 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 63 [2022-01-31 17:35:24,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:35:24,812 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2022-01-31 17:35:24,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:24,812 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2022-01-31 17:35:24,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-31 17:35:24,813 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:35:24,813 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:35:24,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 17:35:24,813 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:35:24,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:35:24,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1367076507, now seen corresponding path program 12 times [2022-01-31 17:35:24,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:35:24,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1034745164] [2022-01-31 17:35:24,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:35:24,814 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:35:24,814 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:35:24,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:35:24,816 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:35:24,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:24,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:35:24,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:24,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:35:24,927 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:35:24,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1034745164] [2022-01-31 17:35:24,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1034745164] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:35:24,927 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:35:24,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 17:35:24,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922490226] [2022-01-31 17:35:24,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:35:24,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 17:35:24,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:35:24,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 17:35:24,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2022-01-31 17:35:24,928 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:25,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:35:25,130 INFO L93 Difference]: Finished difference Result 129 states and 140 transitions. [2022-01-31 17:35:25,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 17:35:25,130 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2022-01-31 17:35:25,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:35:25,130 INFO L225 Difference]: With dead ends: 129 [2022-01-31 17:35:25,130 INFO L226 Difference]: Without dead ends: 76 [2022-01-31 17:35:25,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=315, Invalid=497, Unknown=0, NotChecked=0, Total=812 [2022-01-31 17:35:25,131 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:35:25,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 40 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:35:25,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-01-31 17:35:25,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2022-01-31 17:35:25,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 70 states have (on average 1.0714285714285714) internal successors, (75), 70 states have internal predecessors, (75), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:35:25,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2022-01-31 17:35:25,135 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 67 [2022-01-31 17:35:25,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:35:25,135 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2022-01-31 17:35:25,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:25,135 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2022-01-31 17:35:25,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-31 17:35:25,135 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:35:25,135 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:35:25,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-31 17:35:25,135 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:35:25,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:35:25,136 INFO L85 PathProgramCache]: Analyzing trace with hash -2067546151, now seen corresponding path program 13 times [2022-01-31 17:35:25,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:35:25,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [622985212] [2022-01-31 17:35:25,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:35:25,137 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:35:25,137 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:35:25,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:35:25,138 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:35:25,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:25,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:35:25,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:25,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:35:25,275 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:35:25,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [622985212] [2022-01-31 17:35:25,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [622985212] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:35:25,275 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:35:25,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 17:35:25,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774692801] [2022-01-31 17:35:25,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:35:25,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 17:35:25,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:35:25,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 17:35:25,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2022-01-31 17:35:25,276 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:25,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:35:25,508 INFO L93 Difference]: Finished difference Result 136 states and 147 transitions. [2022-01-31 17:35:25,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 17:35:25,509 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2022-01-31 17:35:25,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:35:25,509 INFO L225 Difference]: With dead ends: 136 [2022-01-31 17:35:25,509 INFO L226 Difference]: Without dead ends: 80 [2022-01-31 17:35:25,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2022-01-31 17:35:25,510 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:35:25,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 55 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:35:25,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-01-31 17:35:25,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-01-31 17:35:25,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 74 states have (on average 1.0675675675675675) internal successors, (79), 74 states have internal predecessors, (79), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:35:25,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2022-01-31 17:35:25,514 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 71 [2022-01-31 17:35:25,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:35:25,514 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2022-01-31 17:35:25,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:25,514 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2022-01-31 17:35:25,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-31 17:35:25,514 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:35:25,514 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:35:25,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-31 17:35:25,514 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:35:25,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:35:25,515 INFO L85 PathProgramCache]: Analyzing trace with hash -2047978277, now seen corresponding path program 14 times [2022-01-31 17:35:25,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:35:25,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [764543317] [2022-01-31 17:35:25,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:35:25,516 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:35:25,516 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:35:25,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:35:25,517 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:35:25,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:25,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:35:25,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:25,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:35:25,665 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:35:25,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [764543317] [2022-01-31 17:35:25,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [764543317] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:35:25,665 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:35:25,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 17:35:25,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676905258] [2022-01-31 17:35:25,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:35:25,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 17:35:25,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:35:25,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 17:35:25,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-01-31 17:35:25,666 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:25,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:35:25,914 INFO L93 Difference]: Finished difference Result 143 states and 154 transitions. [2022-01-31 17:35:25,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 17:35:25,914 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2022-01-31 17:35:25,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:35:25,915 INFO L225 Difference]: With dead ends: 143 [2022-01-31 17:35:25,915 INFO L226 Difference]: Without dead ends: 84 [2022-01-31 17:35:25,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=408, Invalid=648, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 17:35:25,916 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:35:25,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 60 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:35:25,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-01-31 17:35:25,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-01-31 17:35:25,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 78 states have (on average 1.064102564102564) internal successors, (83), 78 states have internal predecessors, (83), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:35:25,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2022-01-31 17:35:25,920 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 75 [2022-01-31 17:35:25,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:35:25,920 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2022-01-31 17:35:25,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:25,920 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2022-01-31 17:35:25,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-31 17:35:25,920 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:35:25,921 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:35:25,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-31 17:35:25,921 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:35:25,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:35:25,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1888674023, now seen corresponding path program 15 times [2022-01-31 17:35:25,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:35:25,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1137127168] [2022-01-31 17:35:25,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:35:25,922 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:35:25,922 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:35:25,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:35:25,924 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:35:25,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:26,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:35:26,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:26,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:35:26,067 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:35:26,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1137127168] [2022-01-31 17:35:26,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1137127168] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:35:26,068 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:35:26,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 17:35:26,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259229812] [2022-01-31 17:35:26,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:35:26,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 17:35:26,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:35:26,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 17:35:26,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2022-01-31 17:35:26,069 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:26,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:35:26,326 INFO L93 Difference]: Finished difference Result 150 states and 161 transitions. [2022-01-31 17:35:26,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 17:35:26,326 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 79 [2022-01-31 17:35:26,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:35:26,327 INFO L225 Difference]: With dead ends: 150 [2022-01-31 17:35:26,327 INFO L226 Difference]: Without dead ends: 88 [2022-01-31 17:35:26,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 17:35:26,328 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:35:26,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 50 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:35:26,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-01-31 17:35:26,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-01-31 17:35:26,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 82 states have (on average 1.0609756097560976) internal successors, (87), 82 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:35:26,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2022-01-31 17:35:26,331 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 79 [2022-01-31 17:35:26,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:35:26,331 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2022-01-31 17:35:26,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:26,331 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2022-01-31 17:35:26,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-31 17:35:26,331 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:35:26,332 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:35:26,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-31 17:35:26,332 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:35:26,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:35:26,332 INFO L85 PathProgramCache]: Analyzing trace with hash -352507109, now seen corresponding path program 16 times [2022-01-31 17:35:26,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:35:26,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [235412327] [2022-01-31 17:35:26,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:35:26,333 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:35:26,333 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:35:26,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:35:26,334 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:35:26,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:26,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:35:26,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:26,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:35:26,500 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:35:26,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [235412327] [2022-01-31 17:35:26,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [235412327] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:35:26,500 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:35:26,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 17:35:26,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111515720] [2022-01-31 17:35:26,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:35:26,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 17:35:26,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:35:26,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 17:35:26,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2022-01-31 17:35:26,501 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:26,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:35:26,779 INFO L93 Difference]: Finished difference Result 157 states and 168 transitions. [2022-01-31 17:35:26,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 17:35:26,780 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-01-31 17:35:26,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:35:26,780 INFO L225 Difference]: With dead ends: 157 [2022-01-31 17:35:26,780 INFO L226 Difference]: Without dead ends: 92 [2022-01-31 17:35:26,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=513, Invalid=819, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 17:35:26,781 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:35:26,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 45 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:35:26,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-01-31 17:35:26,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2022-01-31 17:35:26,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 86 states have (on average 1.058139534883721) internal successors, (91), 86 states have internal predecessors, (91), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:35:26,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2022-01-31 17:35:26,784 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 83 [2022-01-31 17:35:26,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:35:26,785 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2022-01-31 17:35:26,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:26,785 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2022-01-31 17:35:26,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-01-31 17:35:26,785 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:35:26,785 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:35:26,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-31 17:35:26,785 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:35:26,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:35:26,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1743015513, now seen corresponding path program 17 times [2022-01-31 17:35:26,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:35:26,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [725000755] [2022-01-31 17:35:26,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:35:26,787 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:35:26,787 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:35:26,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:35:26,788 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:35:26,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:26,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:35:26,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:26,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:35:26,995 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:35:26,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [725000755] [2022-01-31 17:35:26,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [725000755] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:35:26,995 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:35:26,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 17:35:26,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088372504] [2022-01-31 17:35:26,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:35:26,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 17:35:26,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:35:26,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 17:35:26,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2022-01-31 17:35:26,996 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 20 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:27,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:35:27,295 INFO L93 Difference]: Finished difference Result 164 states and 175 transitions. [2022-01-31 17:35:27,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 17:35:27,295 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 20 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 87 [2022-01-31 17:35:27,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:35:27,296 INFO L225 Difference]: With dead ends: 164 [2022-01-31 17:35:27,296 INFO L226 Difference]: Without dead ends: 96 [2022-01-31 17:35:27,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=570, Invalid=912, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 17:35:27,297 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:35:27,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 40 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:35:27,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-01-31 17:35:27,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2022-01-31 17:35:27,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 90 states have (on average 1.0555555555555556) internal successors, (95), 90 states have internal predecessors, (95), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:35:27,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 100 transitions. [2022-01-31 17:35:27,300 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 100 transitions. Word has length 87 [2022-01-31 17:35:27,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:35:27,300 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 100 transitions. [2022-01-31 17:35:27,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 20 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:27,301 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 100 transitions. [2022-01-31 17:35:27,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-01-31 17:35:27,301 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:35:27,301 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:35:27,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-31 17:35:27,301 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:35:27,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:35:27,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1327468197, now seen corresponding path program 18 times [2022-01-31 17:35:27,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:35:27,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1743669691] [2022-01-31 17:35:27,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:35:27,303 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:35:27,303 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:35:27,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:35:27,304 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:35:27,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:27,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:35:27,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:27,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:35:27,483 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:35:27,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1743669691] [2022-01-31 17:35:27,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1743669691] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:35:27,484 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:35:27,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 17:35:27,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482361088] [2022-01-31 17:35:27,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:35:27,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 17:35:27,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:35:27,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 17:35:27,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2022-01-31 17:35:27,485 INFO L87 Difference]: Start difference. First operand 96 states and 100 transitions. Second operand has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 21 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:27,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:35:27,757 INFO L93 Difference]: Finished difference Result 171 states and 182 transitions. [2022-01-31 17:35:27,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 17:35:27,757 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 21 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 91 [2022-01-31 17:35:27,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:35:27,757 INFO L225 Difference]: With dead ends: 171 [2022-01-31 17:35:27,757 INFO L226 Difference]: Without dead ends: 100 [2022-01-31 17:35:27,758 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 17:35:27,759 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:35:27,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 45 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:35:27,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-01-31 17:35:27,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2022-01-31 17:35:27,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 94 states have (on average 1.053191489361702) internal successors, (99), 94 states have internal predecessors, (99), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:35:27,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 104 transitions. [2022-01-31 17:35:27,762 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 104 transitions. Word has length 91 [2022-01-31 17:35:27,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:35:27,762 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 104 transitions. [2022-01-31 17:35:27,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 21 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:27,762 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 104 transitions. [2022-01-31 17:35:27,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-01-31 17:35:27,763 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:35:27,763 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:35:27,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-31 17:35:27,763 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:35:27,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:35:27,763 INFO L85 PathProgramCache]: Analyzing trace with hash -279884391, now seen corresponding path program 19 times [2022-01-31 17:35:27,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:35:27,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [520348078] [2022-01-31 17:35:27,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:35:27,764 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:35:27,764 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:35:27,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:35:27,765 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:35:27,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:27,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:35:27,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:27,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:35:27,960 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:35:27,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [520348078] [2022-01-31 17:35:27,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [520348078] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:35:27,960 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:35:27,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 17:35:27,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655425560] [2022-01-31 17:35:27,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:35:27,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 17:35:27,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:35:27,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 17:35:27,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2022-01-31 17:35:27,961 INFO L87 Difference]: Start difference. First operand 100 states and 104 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:28,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:35:28,313 INFO L93 Difference]: Finished difference Result 178 states and 189 transitions. [2022-01-31 17:35:28,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 17:35:28,313 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2022-01-31 17:35:28,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:35:28,314 INFO L225 Difference]: With dead ends: 178 [2022-01-31 17:35:28,314 INFO L226 Difference]: Without dead ends: 104 [2022-01-31 17:35:28,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=693, Invalid=1113, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 17:35:28,324 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:35:28,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 50 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:35:28,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-01-31 17:35:28,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2022-01-31 17:35:28,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 98 states have (on average 1.0510204081632653) internal successors, (103), 98 states have internal predecessors, (103), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:35:28,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 108 transitions. [2022-01-31 17:35:28,329 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 108 transitions. Word has length 95 [2022-01-31 17:35:28,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:35:28,330 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 108 transitions. [2022-01-31 17:35:28,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:28,330 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 108 transitions. [2022-01-31 17:35:28,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-01-31 17:35:28,330 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:35:28,331 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:35:28,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-31 17:35:28,331 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:35:28,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:35:28,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1462753381, now seen corresponding path program 20 times [2022-01-31 17:35:28,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:35:28,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [190649096] [2022-01-31 17:35:28,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:35:28,332 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:35:28,332 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:35:28,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:35:28,335 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:35:28,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:28,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:35:28,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:28,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:35:28,580 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:35:28,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [190649096] [2022-01-31 17:35:28,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [190649096] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:35:28,580 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:35:28,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 17:35:28,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58259682] [2022-01-31 17:35:28,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:35:28,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 17:35:28,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:35:28,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 17:35:28,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2022-01-31 17:35:28,581 INFO L87 Difference]: Start difference. First operand 104 states and 108 transitions. Second operand has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 23 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:28,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:35:28,962 INFO L93 Difference]: Finished difference Result 185 states and 196 transitions. [2022-01-31 17:35:28,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 17:35:28,963 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 23 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 99 [2022-01-31 17:35:28,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:35:28,964 INFO L225 Difference]: With dead ends: 185 [2022-01-31 17:35:28,964 INFO L226 Difference]: Without dead ends: 108 [2022-01-31 17:35:28,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=759, Invalid=1221, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 17:35:28,965 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:35:28,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 50 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:35:28,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-01-31 17:35:28,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2022-01-31 17:35:28,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 102 states have (on average 1.0490196078431373) internal successors, (107), 102 states have internal predecessors, (107), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:35:28,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 112 transitions. [2022-01-31 17:35:28,969 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 112 transitions. Word has length 99 [2022-01-31 17:35:28,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:35:28,969 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 112 transitions. [2022-01-31 17:35:28,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 23 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:28,969 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 112 transitions. [2022-01-31 17:35:28,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-01-31 17:35:28,969 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:35:28,969 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:35:28,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-31 17:35:28,970 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:35:28,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:35:28,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1243865895, now seen corresponding path program 21 times [2022-01-31 17:35:28,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:35:28,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [181588065] [2022-01-31 17:35:28,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:35:28,971 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:35:28,971 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:35:28,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:35:28,972 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:35:29,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:29,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:35:29,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:29,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:35:29,198 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:35:29,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [181588065] [2022-01-31 17:35:29,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [181588065] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:35:29,199 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:35:29,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 17:35:29,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841165647] [2022-01-31 17:35:29,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:35:29,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 17:35:29,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:35:29,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 17:35:29,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2022-01-31 17:35:29,199 INFO L87 Difference]: Start difference. First operand 108 states and 112 transitions. Second operand has 25 states, 25 states have (on average 1.56) internal successors, (39), 24 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:29,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:35:29,576 INFO L93 Difference]: Finished difference Result 192 states and 203 transitions. [2022-01-31 17:35:29,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 17:35:29,576 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 24 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 103 [2022-01-31 17:35:29,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:35:29,577 INFO L225 Difference]: With dead ends: 192 [2022-01-31 17:35:29,577 INFO L226 Difference]: Without dead ends: 112 [2022-01-31 17:35:29,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=828, Invalid=1334, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 17:35:29,578 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 329 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 329 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:35:29,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 40 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [329 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:35:29,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-01-31 17:35:29,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2022-01-31 17:35:29,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 106 states have (on average 1.0471698113207548) internal successors, (111), 106 states have internal predecessors, (111), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:35:29,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 116 transitions. [2022-01-31 17:35:29,582 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 116 transitions. Word has length 103 [2022-01-31 17:35:29,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:35:29,582 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 116 transitions. [2022-01-31 17:35:29,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 24 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:29,582 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 116 transitions. [2022-01-31 17:35:29,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-01-31 17:35:29,583 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:35:29,583 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:35:29,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-31 17:35:29,583 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:35:29,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:35:29,583 INFO L85 PathProgramCache]: Analyzing trace with hash -989573669, now seen corresponding path program 22 times [2022-01-31 17:35:29,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:35:29,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [291734859] [2022-01-31 17:35:29,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:35:29,585 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:35:29,585 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:35:29,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:35:29,586 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:35:29,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:29,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:35:29,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:29,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:35:29,843 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:35:29,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [291734859] [2022-01-31 17:35:29,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [291734859] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:35:29,844 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:35:29,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 17:35:29,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499849770] [2022-01-31 17:35:29,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:35:29,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 17:35:29,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:35:29,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 17:35:29,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-01-31 17:35:29,845 INFO L87 Difference]: Start difference. First operand 112 states and 116 transitions. Second operand has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 25 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:30,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:35:30,281 INFO L93 Difference]: Finished difference Result 199 states and 210 transitions. [2022-01-31 17:35:30,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 17:35:30,281 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 25 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 107 [2022-01-31 17:35:30,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:35:30,282 INFO L225 Difference]: With dead ends: 199 [2022-01-31 17:35:30,282 INFO L226 Difference]: Without dead ends: 116 [2022-01-31 17:35:30,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=900, Invalid=1452, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 17:35:30,283 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:35:30,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 55 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:35:30,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-01-31 17:35:30,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2022-01-31 17:35:30,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 110 states have (on average 1.0454545454545454) internal successors, (115), 110 states have internal predecessors, (115), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:35:30,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 120 transitions. [2022-01-31 17:35:30,290 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 120 transitions. Word has length 107 [2022-01-31 17:35:30,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:35:30,290 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 120 transitions. [2022-01-31 17:35:30,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 25 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:30,290 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 120 transitions. [2022-01-31 17:35:30,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-01-31 17:35:30,291 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:35:30,291 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:35:30,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-31 17:35:30,291 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:35:30,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:35:30,291 INFO L85 PathProgramCache]: Analyzing trace with hash 2058140697, now seen corresponding path program 23 times [2022-01-31 17:35:30,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:35:30,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [406424435] [2022-01-31 17:35:30,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:35:30,295 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:35:30,295 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:35:30,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:35:30,298 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:35:30,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:30,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:35:30,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:30,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:35:30,564 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:35:30,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [406424435] [2022-01-31 17:35:30,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [406424435] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:35:30,564 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:35:30,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 17:35:30,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064783857] [2022-01-31 17:35:30,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:35:30,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 17:35:30,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:35:30,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 17:35:30,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2022-01-31 17:35:30,565 INFO L87 Difference]: Start difference. First operand 116 states and 120 transitions. Second operand has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 26 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:31,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:35:31,009 INFO L93 Difference]: Finished difference Result 206 states and 217 transitions. [2022-01-31 17:35:31,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 17:35:31,010 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 26 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 111 [2022-01-31 17:35:31,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:35:31,010 INFO L225 Difference]: With dead ends: 206 [2022-01-31 17:35:31,010 INFO L226 Difference]: Without dead ends: 120 [2022-01-31 17:35:31,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=975, Invalid=1575, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 17:35:31,011 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 340 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 340 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:35:31,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 40 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [340 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:35:31,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-01-31 17:35:31,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2022-01-31 17:35:31,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 114 states have (on average 1.043859649122807) internal successors, (119), 114 states have internal predecessors, (119), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:35:31,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 124 transitions. [2022-01-31 17:35:31,015 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 124 transitions. Word has length 111 [2022-01-31 17:35:31,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:35:31,015 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 124 transitions. [2022-01-31 17:35:31,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 26 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:31,016 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 124 transitions. [2022-01-31 17:35:31,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-01-31 17:35:31,016 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:35:31,016 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:35:31,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-31 17:35:31,016 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:35:31,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:35:31,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1732975589, now seen corresponding path program 24 times [2022-01-31 17:35:31,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:35:31,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1677345176] [2022-01-31 17:35:31,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:35:31,017 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:35:31,018 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:35:31,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:35:31,021 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:35:31,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:31,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:35:31,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:31,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:35:31,305 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:35:31,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1677345176] [2022-01-31 17:35:31,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1677345176] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:35:31,305 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:35:31,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 17:35:31,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506520842] [2022-01-31 17:35:31,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:35:31,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 17:35:31,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:35:31,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 17:35:31,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2022-01-31 17:35:31,306 INFO L87 Difference]: Start difference. First operand 120 states and 124 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:31,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:35:31,799 INFO L93 Difference]: Finished difference Result 213 states and 224 transitions. [2022-01-31 17:35:31,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 17:35:31,804 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 115 [2022-01-31 17:35:31,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:35:31,805 INFO L225 Difference]: With dead ends: 213 [2022-01-31 17:35:31,805 INFO L226 Difference]: Without dead ends: 124 [2022-01-31 17:35:31,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1053, Invalid=1703, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 17:35:31,806 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 333 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 333 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:35:31,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 45 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [333 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:35:31,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-01-31 17:35:31,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2022-01-31 17:35:31,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 118 states have (on average 1.0423728813559323) internal successors, (123), 118 states have internal predecessors, (123), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:35:31,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 128 transitions. [2022-01-31 17:35:31,811 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 128 transitions. Word has length 115 [2022-01-31 17:35:31,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:35:31,811 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 128 transitions. [2022-01-31 17:35:31,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:31,811 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 128 transitions. [2022-01-31 17:35:31,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-01-31 17:35:31,812 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:35:31,812 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:35:31,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-01-31 17:35:31,812 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:35:31,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:35:31,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1410651303, now seen corresponding path program 25 times [2022-01-31 17:35:31,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:35:31,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1787721718] [2022-01-31 17:35:31,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:35:31,813 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:35:31,813 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:35:31,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:35:31,815 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:35:31,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:32,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:35:32,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:32,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:35:32,108 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:35:32,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1787721718] [2022-01-31 17:35:32,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1787721718] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:35:32,108 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:35:32,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 17:35:32,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915251804] [2022-01-31 17:35:32,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:35:32,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 17:35:32,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:35:32,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 17:35:32,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2022-01-31 17:35:32,109 INFO L87 Difference]: Start difference. First operand 124 states and 128 transitions. Second operand has 29 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 28 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:32,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:35:32,600 INFO L93 Difference]: Finished difference Result 220 states and 231 transitions. [2022-01-31 17:35:32,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 17:35:32,600 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 28 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 119 [2022-01-31 17:35:32,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:35:32,601 INFO L225 Difference]: With dead ends: 220 [2022-01-31 17:35:32,601 INFO L226 Difference]: Without dead ends: 128 [2022-01-31 17:35:32,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1134, Invalid=1836, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 17:35:32,603 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 302 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 302 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:35:32,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 45 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [302 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:35:32,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-01-31 17:35:32,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2022-01-31 17:35:32,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 122 states have (on average 1.040983606557377) internal successors, (127), 122 states have internal predecessors, (127), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:35:32,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 132 transitions. [2022-01-31 17:35:32,607 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 132 transitions. Word has length 119 [2022-01-31 17:35:32,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:35:32,607 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 132 transitions. [2022-01-31 17:35:32,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 28 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:32,607 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 132 transitions. [2022-01-31 17:35:32,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-01-31 17:35:32,608 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:35:32,608 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:35:32,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-01-31 17:35:32,609 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:35:32,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:35:32,609 INFO L85 PathProgramCache]: Analyzing trace with hash -669390245, now seen corresponding path program 26 times [2022-01-31 17:35:32,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:35:32,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1566266743] [2022-01-31 17:35:32,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:35:32,611 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:35:32,611 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:35:32,611 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:35:32,614 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:35:32,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:32,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:35:32,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:32,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:35:32,925 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:35:32,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1566266743] [2022-01-31 17:35:32,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1566266743] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:35:32,925 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:35:32,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 17:35:32,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554770085] [2022-01-31 17:35:32,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:35:32,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 17:35:32,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:35:32,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 17:35:32,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2022-01-31 17:35:32,926 INFO L87 Difference]: Start difference. First operand 128 states and 132 transitions. Second operand has 30 states, 30 states have (on average 1.4666666666666666) internal successors, (44), 29 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:33,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:35:33,463 INFO L93 Difference]: Finished difference Result 227 states and 238 transitions. [2022-01-31 17:35:33,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 17:35:33,463 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4666666666666666) internal successors, (44), 29 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 123 [2022-01-31 17:35:33,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:35:33,464 INFO L225 Difference]: With dead ends: 227 [2022-01-31 17:35:33,464 INFO L226 Difference]: Without dead ends: 132 [2022-01-31 17:35:33,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1218, Invalid=1974, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 17:35:33,465 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 320 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 320 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:35:33,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 45 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [320 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:35:33,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-01-31 17:35:33,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2022-01-31 17:35:33,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 126 states have (on average 1.0396825396825398) internal successors, (131), 126 states have internal predecessors, (131), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:35:33,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 136 transitions. [2022-01-31 17:35:33,469 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 136 transitions. Word has length 123 [2022-01-31 17:35:33,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:35:33,469 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 136 transitions. [2022-01-31 17:35:33,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4666666666666666) internal successors, (44), 29 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:33,469 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 136 transitions. [2022-01-31 17:35:33,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-01-31 17:35:33,469 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:35:33,469 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:35:33,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-01-31 17:35:33,470 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:35:33,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:35:33,470 INFO L85 PathProgramCache]: Analyzing trace with hash -423662951, now seen corresponding path program 27 times [2022-01-31 17:35:33,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:35:33,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [993773948] [2022-01-31 17:35:33,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:35:33,471 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:35:33,471 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:35:33,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:35:33,474 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:35:33,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:33,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:35:33,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:33,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:35:33,796 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:35:33,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [993773948] [2022-01-31 17:35:33,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [993773948] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:35:33,796 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:35:33,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 17:35:33,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884288457] [2022-01-31 17:35:33,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:35:33,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 17:35:33,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:35:33,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 17:35:33,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2022-01-31 17:35:33,798 INFO L87 Difference]: Start difference. First operand 132 states and 136 transitions. Second operand has 31 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 30 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:34,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:35:34,322 INFO L93 Difference]: Finished difference Result 234 states and 245 transitions. [2022-01-31 17:35:34,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 17:35:34,322 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 30 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 127 [2022-01-31 17:35:34,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:35:34,323 INFO L225 Difference]: With dead ends: 234 [2022-01-31 17:35:34,323 INFO L226 Difference]: Without dead ends: 136 [2022-01-31 17:35:34,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1305, Invalid=2117, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 17:35:34,324 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 416 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 416 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:35:34,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 50 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [416 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:35:34,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-01-31 17:35:34,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2022-01-31 17:35:34,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 130 states have (on average 1.0384615384615385) internal successors, (135), 130 states have internal predecessors, (135), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:35:34,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 140 transitions. [2022-01-31 17:35:34,328 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 140 transitions. Word has length 127 [2022-01-31 17:35:34,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:35:34,328 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 140 transitions. [2022-01-31 17:35:34,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 30 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:34,328 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 140 transitions. [2022-01-31 17:35:34,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-01-31 17:35:34,329 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:35:34,329 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:35:34,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-01-31 17:35:34,329 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:35:34,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:35:34,329 INFO L85 PathProgramCache]: Analyzing trace with hash -664051557, now seen corresponding path program 28 times [2022-01-31 17:35:34,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:35:34,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [321569920] [2022-01-31 17:35:34,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:35:34,330 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:35:34,330 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:35:34,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:35:34,333 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:35:34,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:34,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:35:34,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:34,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:35:34,675 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:35:34,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [321569920] [2022-01-31 17:35:34,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [321569920] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:35:34,675 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:35:34,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 17:35:34,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763189426] [2022-01-31 17:35:34,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:35:34,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 17:35:34,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:35:34,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 17:35:34,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2022-01-31 17:35:34,676 INFO L87 Difference]: Start difference. First operand 136 states and 140 transitions. Second operand has 32 states, 32 states have (on average 1.4375) internal successors, (46), 31 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:35,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:35:35,269 INFO L93 Difference]: Finished difference Result 241 states and 252 transitions. [2022-01-31 17:35:35,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 17:35:35,269 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.4375) internal successors, (46), 31 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 131 [2022-01-31 17:35:35,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:35:35,270 INFO L225 Difference]: With dead ends: 241 [2022-01-31 17:35:35,270 INFO L226 Difference]: Without dead ends: 140 [2022-01-31 17:35:35,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1395, Invalid=2265, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 17:35:35,271 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 341 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 341 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:35:35,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 55 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [341 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:35:35,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-01-31 17:35:35,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2022-01-31 17:35:35,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 134 states have (on average 1.037313432835821) internal successors, (139), 134 states have internal predecessors, (139), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:35:35,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 144 transitions. [2022-01-31 17:35:35,276 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 144 transitions. Word has length 131 [2022-01-31 17:35:35,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:35:35,276 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 144 transitions. [2022-01-31 17:35:35,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.4375) internal successors, (46), 31 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:35,277 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 144 transitions. [2022-01-31 17:35:35,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-01-31 17:35:35,277 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:35:35,277 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:35:35,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-01-31 17:35:35,277 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:35:35,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:35:35,278 INFO L85 PathProgramCache]: Analyzing trace with hash 2001828313, now seen corresponding path program 29 times [2022-01-31 17:35:35,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:35:35,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1139066415] [2022-01-31 17:35:35,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:35:35,279 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:35:35,280 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:35:35,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:35:35,283 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:35:35,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:35,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:35:35,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:35,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:35:35,656 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:35:35,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1139066415] [2022-01-31 17:35:35,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1139066415] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:35:35,656 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:35:35,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 17:35:35,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074129834] [2022-01-31 17:35:35,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:35:35,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 17:35:35,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:35:35,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 17:35:35,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 17:35:35,657 INFO L87 Difference]: Start difference. First operand 140 states and 144 transitions. Second operand has 33 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 32 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:36,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:35:36,237 INFO L93 Difference]: Finished difference Result 248 states and 259 transitions. [2022-01-31 17:35:36,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 17:35:36,238 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 32 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 135 [2022-01-31 17:35:36,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:35:36,238 INFO L225 Difference]: With dead ends: 248 [2022-01-31 17:35:36,238 INFO L226 Difference]: Without dead ends: 144 [2022-01-31 17:35:36,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1488, Invalid=2418, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 17:35:36,240 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 357 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 357 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:35:36,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 50 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [357 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:35:36,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-01-31 17:35:36,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2022-01-31 17:35:36,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 138 states have (on average 1.036231884057971) internal successors, (143), 138 states have internal predecessors, (143), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:35:36,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 148 transitions. [2022-01-31 17:35:36,244 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 148 transitions. Word has length 135 [2022-01-31 17:35:36,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:35:36,244 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 148 transitions. [2022-01-31 17:35:36,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 32 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:36,244 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 148 transitions. [2022-01-31 17:35:36,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-01-31 17:35:36,244 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:35:36,244 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:35:36,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-01-31 17:35:36,245 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:35:36,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:35:36,245 INFO L85 PathProgramCache]: Analyzing trace with hash 266421979, now seen corresponding path program 30 times [2022-01-31 17:35:36,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:35:36,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [809379923] [2022-01-31 17:35:36,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:35:36,246 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:35:36,246 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:35:36,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:35:36,249 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:35:36,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:36,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:35:36,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:36,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:35:36,654 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:35:36,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [809379923] [2022-01-31 17:35:36,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [809379923] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:35:36,654 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:35:36,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 17:35:36,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777303471] [2022-01-31 17:35:36,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:35:36,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 17:35:36,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:35:36,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 17:35:36,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 17:35:36,655 INFO L87 Difference]: Start difference. First operand 144 states and 148 transitions. Second operand has 34 states, 34 states have (on average 1.411764705882353) internal successors, (48), 33 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:37,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:35:37,275 INFO L93 Difference]: Finished difference Result 255 states and 266 transitions. [2022-01-31 17:35:37,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 17:35:37,275 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.411764705882353) internal successors, (48), 33 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 139 [2022-01-31 17:35:37,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:35:37,276 INFO L225 Difference]: With dead ends: 255 [2022-01-31 17:35:37,276 INFO L226 Difference]: Without dead ends: 148 [2022-01-31 17:35:37,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1584, Invalid=2576, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 17:35:37,277 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 384 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 384 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:35:37,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 50 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [384 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:35:37,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-01-31 17:35:37,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2022-01-31 17:35:37,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 142 states have (on average 1.0352112676056338) internal successors, (147), 142 states have internal predecessors, (147), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:35:37,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 152 transitions. [2022-01-31 17:35:37,283 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 152 transitions. Word has length 139 [2022-01-31 17:35:37,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:35:37,283 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 152 transitions. [2022-01-31 17:35:37,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.411764705882353) internal successors, (48), 33 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:37,283 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 152 transitions. [2022-01-31 17:35:37,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-01-31 17:35:37,283 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:35:37,284 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:35:37,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-01-31 17:35:37,284 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:35:37,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:35:37,284 INFO L85 PathProgramCache]: Analyzing trace with hash -657893095, now seen corresponding path program 31 times [2022-01-31 17:35:37,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:35:37,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [295113337] [2022-01-31 17:35:37,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:35:37,285 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:35:37,285 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:35:37,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:35:37,288 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:35:37,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:37,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:35:37,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:37,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:35:37,685 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:35:37,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [295113337] [2022-01-31 17:35:37,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [295113337] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:35:37,686 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:35:37,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 17:35:37,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640576905] [2022-01-31 17:35:37,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:35:37,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 17:35:37,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:35:37,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 17:35:37,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 17:35:37,687 INFO L87 Difference]: Start difference. First operand 148 states and 152 transitions. Second operand has 35 states, 35 states have (on average 1.4) internal successors, (49), 34 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:38,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:35:38,314 INFO L93 Difference]: Finished difference Result 262 states and 273 transitions. [2022-01-31 17:35:38,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 17:35:38,314 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.4) internal successors, (49), 34 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2022-01-31 17:35:38,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:35:38,315 INFO L225 Difference]: With dead ends: 262 [2022-01-31 17:35:38,315 INFO L226 Difference]: Without dead ends: 152 [2022-01-31 17:35:38,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1683, Invalid=2739, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 17:35:38,316 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 435 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 435 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:35:38,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 50 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [435 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:35:38,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-01-31 17:35:38,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2022-01-31 17:35:38,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 146 states have (on average 1.0342465753424657) internal successors, (151), 146 states have internal predecessors, (151), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:35:38,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 156 transitions. [2022-01-31 17:35:38,320 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 156 transitions. Word has length 143 [2022-01-31 17:35:38,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:35:38,320 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 156 transitions. [2022-01-31 17:35:38,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.4) internal successors, (49), 34 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:38,320 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 156 transitions. [2022-01-31 17:35:38,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-01-31 17:35:38,320 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:35:38,320 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:35:38,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-01-31 17:35:38,321 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:35:38,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:35:38,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1783390949, now seen corresponding path program 32 times [2022-01-31 17:35:38,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:35:38,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [105659342] [2022-01-31 17:35:38,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:35:38,322 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:35:38,322 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:35:38,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:35:38,325 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:35:38,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:38,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:35:38,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:38,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:35:38,790 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:35:38,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [105659342] [2022-01-31 17:35:38,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [105659342] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:35:38,791 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:35:38,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 17:35:38,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104591354] [2022-01-31 17:35:38,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:35:38,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 17:35:38,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:35:38,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 17:35:38,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 17:35:38,792 INFO L87 Difference]: Start difference. First operand 152 states and 156 transitions. Second operand has 36 states, 36 states have (on average 1.3888888888888888) internal successors, (50), 35 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:39,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:35:39,502 INFO L93 Difference]: Finished difference Result 269 states and 280 transitions. [2022-01-31 17:35:39,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 17:35:39,503 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.3888888888888888) internal successors, (50), 35 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 147 [2022-01-31 17:35:39,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:35:39,503 INFO L225 Difference]: With dead ends: 269 [2022-01-31 17:35:39,503 INFO L226 Difference]: Without dead ends: 156 [2022-01-31 17:35:39,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1785, Invalid=2907, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 17:35:39,504 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 426 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 426 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:35:39,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 50 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [426 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:35:39,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-01-31 17:35:39,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2022-01-31 17:35:39,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 150 states have (on average 1.0333333333333334) internal successors, (155), 150 states have internal predecessors, (155), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:35:39,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 160 transitions. [2022-01-31 17:35:39,508 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 160 transitions. Word has length 147 [2022-01-31 17:35:39,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:35:39,508 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 160 transitions. [2022-01-31 17:35:39,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.3888888888888888) internal successors, (50), 35 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:39,508 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 160 transitions. [2022-01-31 17:35:39,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-01-31 17:35:39,509 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:35:39,509 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:35:39,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-01-31 17:35:39,509 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:35:39,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:35:39,509 INFO L85 PathProgramCache]: Analyzing trace with hash 894371929, now seen corresponding path program 33 times [2022-01-31 17:35:39,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:35:39,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1989882346] [2022-01-31 17:35:39,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:35:39,510 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:35:39,510 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:35:39,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:35:39,513 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:35:39,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:39,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:35:39,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:39,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:35:39,953 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:35:39,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1989882346] [2022-01-31 17:35:39,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1989882346] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:35:39,953 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:35:39,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 17:35:39,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099401519] [2022-01-31 17:35:39,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:35:39,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 17:35:39,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:35:39,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 17:35:39,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 17:35:39,954 INFO L87 Difference]: Start difference. First operand 156 states and 160 transitions. Second operand has 37 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 36 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:40,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:35:40,656 INFO L93 Difference]: Finished difference Result 276 states and 287 transitions. [2022-01-31 17:35:40,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 17:35:40,656 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 36 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 151 [2022-01-31 17:35:40,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:35:40,657 INFO L225 Difference]: With dead ends: 276 [2022-01-31 17:35:40,657 INFO L226 Difference]: Without dead ends: 160 [2022-01-31 17:35:40,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1890, Invalid=3080, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 17:35:40,658 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 431 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 431 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:35:40,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 45 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [431 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:35:40,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-01-31 17:35:40,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2022-01-31 17:35:40,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 154 states have (on average 1.0324675324675325) internal successors, (159), 154 states have internal predecessors, (159), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:35:40,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 164 transitions. [2022-01-31 17:35:40,663 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 164 transitions. Word has length 151 [2022-01-31 17:35:40,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:35:40,663 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 164 transitions. [2022-01-31 17:35:40,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 36 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:40,663 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 164 transitions. [2022-01-31 17:35:40,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-01-31 17:35:40,664 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:35:40,664 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:35:40,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-01-31 17:35:40,664 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:35:40,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:35:40,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1575328933, now seen corresponding path program 34 times [2022-01-31 17:35:40,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:35:40,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1415398550] [2022-01-31 17:35:40,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:35:40,665 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:35:40,665 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:35:40,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:35:40,669 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:35:40,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:41,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:35:41,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:41,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:35:41,169 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:35:41,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1415398550] [2022-01-31 17:35:41,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1415398550] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:35:41,171 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:35:41,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 17:35:41,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162167371] [2022-01-31 17:35:41,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:35:41,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 17:35:41,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:35:41,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 17:35:41,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 17:35:41,172 INFO L87 Difference]: Start difference. First operand 160 states and 164 transitions. Second operand has 38 states, 38 states have (on average 1.368421052631579) internal successors, (52), 37 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:41,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:35:41,870 INFO L93 Difference]: Finished difference Result 283 states and 294 transitions. [2022-01-31 17:35:41,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 17:35:41,871 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.368421052631579) internal successors, (52), 37 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 155 [2022-01-31 17:35:41,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:35:41,871 INFO L225 Difference]: With dead ends: 283 [2022-01-31 17:35:41,871 INFO L226 Difference]: Without dead ends: 164 [2022-01-31 17:35:41,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1998, Invalid=3258, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 17:35:41,873 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 502 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 502 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:35:41,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 40 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [502 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:35:41,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-01-31 17:35:41,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2022-01-31 17:35:41,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 158 states have (on average 1.0316455696202531) internal successors, (163), 158 states have internal predecessors, (163), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:35:41,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 168 transitions. [2022-01-31 17:35:41,877 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 168 transitions. Word has length 155 [2022-01-31 17:35:41,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:35:41,877 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 168 transitions. [2022-01-31 17:35:41,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.368421052631579) internal successors, (52), 37 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:41,878 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 168 transitions. [2022-01-31 17:35:41,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-01-31 17:35:41,878 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:35:41,878 INFO L514 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:35:41,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-01-31 17:35:41,878 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:35:41,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:35:41,878 INFO L85 PathProgramCache]: Analyzing trace with hash -435517543, now seen corresponding path program 35 times [2022-01-31 17:35:41,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:35:41,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [857685020] [2022-01-31 17:35:41,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:35:41,879 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:35:41,879 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:35:41,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:35:41,883 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:35:41,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:42,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:35:42,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:42,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:35:42,394 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:35:42,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [857685020] [2022-01-31 17:35:42,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [857685020] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:35:42,394 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:35:42,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-01-31 17:35:42,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364921085] [2022-01-31 17:35:42,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:35:42,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 17:35:42,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:35:42,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 17:35:42,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 17:35:42,395 INFO L87 Difference]: Start difference. First operand 164 states and 168 transitions. Second operand has 39 states, 39 states have (on average 1.358974358974359) internal successors, (53), 38 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:43,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:35:43,168 INFO L93 Difference]: Finished difference Result 290 states and 301 transitions. [2022-01-31 17:35:43,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 17:35:43,169 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.358974358974359) internal successors, (53), 38 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 159 [2022-01-31 17:35:43,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:35:43,169 INFO L225 Difference]: With dead ends: 290 [2022-01-31 17:35:43,169 INFO L226 Difference]: Without dead ends: 168 [2022-01-31 17:35:43,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2109, Invalid=3441, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 17:35:43,171 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 576 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 576 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:35:43,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 30 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [576 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:35:43,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-01-31 17:35:43,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2022-01-31 17:35:43,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 162 states have (on average 1.0308641975308641) internal successors, (167), 162 states have internal predecessors, (167), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:35:43,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 172 transitions. [2022-01-31 17:35:43,175 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 172 transitions. Word has length 159 [2022-01-31 17:35:43,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:35:43,175 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 172 transitions. [2022-01-31 17:35:43,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.358974358974359) internal successors, (53), 38 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:43,175 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 172 transitions. [2022-01-31 17:35:43,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-01-31 17:35:43,176 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:35:43,176 INFO L514 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:35:43,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-01-31 17:35:43,176 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:35:43,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:35:43,176 INFO L85 PathProgramCache]: Analyzing trace with hash 239966619, now seen corresponding path program 36 times [2022-01-31 17:35:43,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:35:43,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [76346902] [2022-01-31 17:35:43,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:35:43,177 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:35:43,177 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:35:43,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:35:43,180 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:35:43,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:43,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:35:43,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:43,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:35:43,710 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:35:43,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [76346902] [2022-01-31 17:35:43,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [76346902] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:35:43,710 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:35:43,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-01-31 17:35:43,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880711260] [2022-01-31 17:35:43,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:35:43,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 17:35:43,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:35:43,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 17:35:43,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 17:35:43,711 INFO L87 Difference]: Start difference. First operand 168 states and 172 transitions. Second operand has 40 states, 40 states have (on average 1.35) internal successors, (54), 39 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:44,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:35:44,527 INFO L93 Difference]: Finished difference Result 297 states and 308 transitions. [2022-01-31 17:35:44,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 17:35:44,528 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.35) internal successors, (54), 39 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 163 [2022-01-31 17:35:44,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:35:44,528 INFO L225 Difference]: With dead ends: 297 [2022-01-31 17:35:44,528 INFO L226 Difference]: Without dead ends: 172 [2022-01-31 17:35:44,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2223, Invalid=3629, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 17:35:44,530 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 517 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 517 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:35:44,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 40 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [517 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:35:44,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-01-31 17:35:44,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2022-01-31 17:35:44,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 166 states have (on average 1.0301204819277108) internal successors, (171), 166 states have internal predecessors, (171), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:35:44,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 176 transitions. [2022-01-31 17:35:44,535 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 176 transitions. Word has length 163 [2022-01-31 17:35:44,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:35:44,535 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 176 transitions. [2022-01-31 17:35:44,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.35) internal successors, (54), 39 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:44,535 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 176 transitions. [2022-01-31 17:35:44,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-01-31 17:35:44,535 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:35:44,536 INFO L514 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:35:44,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-01-31 17:35:44,536 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:35:44,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:35:44,536 INFO L85 PathProgramCache]: Analyzing trace with hash -215755047, now seen corresponding path program 37 times [2022-01-31 17:35:44,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:35:44,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [787206446] [2022-01-31 17:35:44,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:35:44,537 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:35:44,537 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:35:44,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:35:44,553 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:35:44,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:45,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:35:45,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:45,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:35:45,127 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:35:45,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [787206446] [2022-01-31 17:35:45,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [787206446] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:35:45,127 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:35:45,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-01-31 17:35:45,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915165919] [2022-01-31 17:35:45,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:35:45,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-31 17:35:45,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:35:45,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-31 17:35:45,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 17:35:45,129 INFO L87 Difference]: Start difference. First operand 172 states and 176 transitions. Second operand has 41 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 40 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:45,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:35:45,949 INFO L93 Difference]: Finished difference Result 304 states and 315 transitions. [2022-01-31 17:35:45,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 17:35:45,950 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 40 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 167 [2022-01-31 17:35:45,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:35:45,950 INFO L225 Difference]: With dead ends: 304 [2022-01-31 17:35:45,950 INFO L226 Difference]: Without dead ends: 176 [2022-01-31 17:35:45,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2340, Invalid=3822, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 17:35:45,952 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 518 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 518 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:35:45,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 35 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [518 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:35:45,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-01-31 17:35:45,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2022-01-31 17:35:45,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 170 states have (on average 1.0294117647058822) internal successors, (175), 170 states have internal predecessors, (175), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:35:45,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 180 transitions. [2022-01-31 17:35:45,956 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 180 transitions. Word has length 167 [2022-01-31 17:35:45,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:35:45,956 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 180 transitions. [2022-01-31 17:35:45,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 40 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:45,956 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 180 transitions. [2022-01-31 17:35:45,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-01-31 17:35:45,957 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:35:45,957 INFO L514 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:35:45,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-01-31 17:35:45,957 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:35:45,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:35:45,957 INFO L85 PathProgramCache]: Analyzing trace with hash -729464869, now seen corresponding path program 38 times [2022-01-31 17:35:45,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:35:45,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1718281579] [2022-01-31 17:35:45,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:35:45,958 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:35:45,958 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:35:45,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:35:45,962 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:35:46,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:46,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:35:46,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:46,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:35:46,506 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:35:46,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1718281579] [2022-01-31 17:35:46,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1718281579] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:35:46,506 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:35:46,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-01-31 17:35:46,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070153184] [2022-01-31 17:35:46,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:35:46,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 17:35:46,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:35:46,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 17:35:46,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 17:35:46,507 INFO L87 Difference]: Start difference. First operand 176 states and 180 transitions. Second operand has 42 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 41 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:47,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:35:47,354 INFO L93 Difference]: Finished difference Result 311 states and 322 transitions. [2022-01-31 17:35:47,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-31 17:35:47,354 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 41 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 171 [2022-01-31 17:35:47,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:35:47,355 INFO L225 Difference]: With dead ends: 311 [2022-01-31 17:35:47,355 INFO L226 Difference]: Without dead ends: 180 [2022-01-31 17:35:47,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2460, Invalid=4020, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 17:35:47,360 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 562 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 562 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:35:47,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 50 Invalid, 799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [562 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:35:47,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-01-31 17:35:47,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2022-01-31 17:35:47,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 174 states have (on average 1.028735632183908) internal successors, (179), 174 states have internal predecessors, (179), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:35:47,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 184 transitions. [2022-01-31 17:35:47,367 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 184 transitions. Word has length 171 [2022-01-31 17:35:47,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:35:47,367 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 184 transitions. [2022-01-31 17:35:47,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 41 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:47,367 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 184 transitions. [2022-01-31 17:35:47,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-01-31 17:35:47,368 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:35:47,368 INFO L514 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:35:47,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-01-31 17:35:47,368 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:35:47,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:35:47,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1815939559, now seen corresponding path program 39 times [2022-01-31 17:35:47,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:35:47,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1764040664] [2022-01-31 17:35:47,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:35:47,369 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:35:47,369 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:35:47,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:35:47,373 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:35:47,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:47,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:35:47,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:47,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:35:47,959 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:35:47,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1764040664] [2022-01-31 17:35:47,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1764040664] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:35:47,959 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:35:47,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-01-31 17:35:47,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722607463] [2022-01-31 17:35:47,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:35:47,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-31 17:35:47,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:35:47,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-31 17:35:47,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 17:35:47,960 INFO L87 Difference]: Start difference. First operand 180 states and 184 transitions. Second operand has 43 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 42 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:48,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:35:48,948 INFO L93 Difference]: Finished difference Result 318 states and 329 transitions. [2022-01-31 17:35:48,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-31 17:35:48,948 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 42 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 175 [2022-01-31 17:35:48,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:35:48,949 INFO L225 Difference]: With dead ends: 318 [2022-01-31 17:35:48,949 INFO L226 Difference]: Without dead ends: 184 [2022-01-31 17:35:48,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2583, Invalid=4223, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 17:35:48,950 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 445 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 445 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:35:48,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 60 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [445 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:35:48,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-01-31 17:35:48,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2022-01-31 17:35:48,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 178 states have (on average 1.0280898876404494) internal successors, (183), 178 states have internal predecessors, (183), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:35:48,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 188 transitions. [2022-01-31 17:35:48,954 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 188 transitions. Word has length 175 [2022-01-31 17:35:48,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:35:48,955 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 188 transitions. [2022-01-31 17:35:48,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 42 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:48,955 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 188 transitions. [2022-01-31 17:35:48,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-01-31 17:35:48,955 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:35:48,955 INFO L514 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:35:48,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-01-31 17:35:48,956 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:35:48,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:35:48,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1879484901, now seen corresponding path program 40 times [2022-01-31 17:35:48,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:35:48,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [461947158] [2022-01-31 17:35:48,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:35:48,957 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:35:48,957 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:35:48,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:35:48,964 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:35:49,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:49,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:35:49,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:49,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:35:49,634 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:35:49,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [461947158] [2022-01-31 17:35:49,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [461947158] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:35:49,634 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:35:49,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-01-31 17:35:49,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322511544] [2022-01-31 17:35:49,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:35:49,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 17:35:49,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:35:49,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 17:35:49,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 17:35:49,635 INFO L87 Difference]: Start difference. First operand 184 states and 188 transitions. Second operand has 44 states, 44 states have (on average 1.3181818181818181) internal successors, (58), 43 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:50,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:35:50,550 INFO L93 Difference]: Finished difference Result 325 states and 336 transitions. [2022-01-31 17:35:50,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-31 17:35:50,550 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.3181818181818181) internal successors, (58), 43 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 179 [2022-01-31 17:35:50,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:35:50,551 INFO L225 Difference]: With dead ends: 325 [2022-01-31 17:35:50,551 INFO L226 Difference]: Without dead ends: 188 [2022-01-31 17:35:50,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2709, Invalid=4431, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 17:35:50,552 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 516 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 516 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:35:50,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 55 Invalid, 776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [516 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:35:50,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-01-31 17:35:50,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2022-01-31 17:35:50,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 182 states have (on average 1.0274725274725274) internal successors, (187), 182 states have internal predecessors, (187), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:35:50,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 192 transitions. [2022-01-31 17:35:50,557 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 192 transitions. Word has length 179 [2022-01-31 17:35:50,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:35:50,557 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 192 transitions. [2022-01-31 17:35:50,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.3181818181818181) internal successors, (58), 43 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:50,557 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 192 transitions. [2022-01-31 17:35:50,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-01-31 17:35:50,558 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:35:50,558 INFO L514 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:35:50,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-01-31 17:35:50,558 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:35:50,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:35:50,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1374689959, now seen corresponding path program 41 times [2022-01-31 17:35:50,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:35:50,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [74616439] [2022-01-31 17:35:50,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:35:50,559 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:35:50,559 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:35:50,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:35:50,563 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:35:50,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:51,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:35:51,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:51,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:35:51,207 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:35:51,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [74616439] [2022-01-31 17:35:51,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [74616439] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:35:51,207 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:35:51,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-01-31 17:35:51,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728006291] [2022-01-31 17:35:51,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:35:51,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-31 17:35:51,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:35:51,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-31 17:35:51,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 17:35:51,209 INFO L87 Difference]: Start difference. First operand 188 states and 192 transitions. Second operand has 45 states, 45 states have (on average 1.3111111111111111) internal successors, (59), 44 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:52,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:35:52,178 INFO L93 Difference]: Finished difference Result 332 states and 343 transitions. [2022-01-31 17:35:52,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 17:35:52,179 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.3111111111111111) internal successors, (59), 44 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 183 [2022-01-31 17:35:52,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:35:52,179 INFO L225 Difference]: With dead ends: 332 [2022-01-31 17:35:52,179 INFO L226 Difference]: Without dead ends: 192 [2022-01-31 17:35:52,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2838, Invalid=4644, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 17:35:52,180 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 624 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 624 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:35:52,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 40 Invalid, 843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [624 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:35:52,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-01-31 17:35:52,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2022-01-31 17:35:52,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 186 states have (on average 1.0268817204301075) internal successors, (191), 186 states have internal predecessors, (191), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:35:52,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 196 transitions. [2022-01-31 17:35:52,185 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 196 transitions. Word has length 183 [2022-01-31 17:35:52,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:35:52,185 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 196 transitions. [2022-01-31 17:35:52,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.3111111111111111) internal successors, (59), 44 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:52,185 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 196 transitions. [2022-01-31 17:35:52,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-01-31 17:35:52,186 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:35:52,186 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:35:52,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-01-31 17:35:52,186 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:35:52,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:35:52,186 INFO L85 PathProgramCache]: Analyzing trace with hash -52306853, now seen corresponding path program 42 times [2022-01-31 17:35:52,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:35:52,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1281762119] [2022-01-31 17:35:52,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:35:52,187 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:35:52,187 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:35:52,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:35:52,192 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:35:52,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:52,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:35:52,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:52,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:35:52,883 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:35:52,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1281762119] [2022-01-31 17:35:52,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1281762119] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:35:52,884 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:35:52,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-01-31 17:35:52,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911325381] [2022-01-31 17:35:52,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:35:52,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-31 17:35:52,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:35:52,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-31 17:35:52,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 17:35:52,885 INFO L87 Difference]: Start difference. First operand 192 states and 196 transitions. Second operand has 46 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 45 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:53,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:35:53,918 INFO L93 Difference]: Finished difference Result 339 states and 350 transitions. [2022-01-31 17:35:53,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 17:35:53,918 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 45 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 187 [2022-01-31 17:35:53,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:35:53,919 INFO L225 Difference]: With dead ends: 339 [2022-01-31 17:35:53,919 INFO L226 Difference]: Without dead ends: 196 [2022-01-31 17:35:53,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2970, Invalid=4862, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 17:35:53,920 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 602 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 602 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:35:53,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 55 Invalid, 870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [602 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:35:53,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-01-31 17:35:53,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2022-01-31 17:35:53,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 190 states have (on average 1.0263157894736843) internal successors, (195), 190 states have internal predecessors, (195), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:35:53,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 200 transitions. [2022-01-31 17:35:53,924 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 200 transitions. Word has length 187 [2022-01-31 17:35:53,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:35:53,924 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 200 transitions. [2022-01-31 17:35:53,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 45 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:53,924 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 200 transitions. [2022-01-31 17:35:53,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-01-31 17:35:53,925 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:35:53,925 INFO L514 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:35:53,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-01-31 17:35:53,925 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:35:53,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:35:53,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1462936729, now seen corresponding path program 43 times [2022-01-31 17:35:53,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:35:53,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1703016455] [2022-01-31 17:35:53,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:35:53,926 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:35:53,926 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:35:53,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:35:53,931 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:35:53,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:54,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:35:54,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:54,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:35:54,612 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:35:54,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1703016455] [2022-01-31 17:35:54,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1703016455] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:35:54,612 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:35:54,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-01-31 17:35:54,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708638350] [2022-01-31 17:35:54,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:35:54,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-31 17:35:54,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:35:54,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-31 17:35:54,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 17:35:54,613 INFO L87 Difference]: Start difference. First operand 196 states and 200 transitions. Second operand has 47 states, 47 states have (on average 1.297872340425532) internal successors, (61), 46 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:55,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:35:55,601 INFO L93 Difference]: Finished difference Result 346 states and 357 transitions. [2022-01-31 17:35:55,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-31 17:35:55,601 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.297872340425532) internal successors, (61), 46 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 191 [2022-01-31 17:35:55,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:35:55,602 INFO L225 Difference]: With dead ends: 346 [2022-01-31 17:35:55,602 INFO L226 Difference]: Without dead ends: 200 [2022-01-31 17:35:55,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3105, Invalid=5085, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 17:35:55,603 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 586 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 586 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:35:55,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 45 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [586 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:35:55,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-01-31 17:35:55,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2022-01-31 17:35:55,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 194 states have (on average 1.0257731958762886) internal successors, (199), 194 states have internal predecessors, (199), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:35:55,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 204 transitions. [2022-01-31 17:35:55,608 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 204 transitions. Word has length 191 [2022-01-31 17:35:55,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:35:55,608 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 204 transitions. [2022-01-31 17:35:55,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.297872340425532) internal successors, (61), 46 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:55,608 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 204 transitions. [2022-01-31 17:35:55,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-01-31 17:35:55,609 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:35:55,609 INFO L514 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:35:55,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-01-31 17:35:55,609 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:35:55,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:35:55,609 INFO L85 PathProgramCache]: Analyzing trace with hash 2021053083, now seen corresponding path program 44 times [2022-01-31 17:35:55,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:35:55,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [173537743] [2022-01-31 17:35:55,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:35:55,610 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:35:55,610 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:35:55,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:35:55,615 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:35:55,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:56,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:35:56,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:56,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:35:56,373 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:35:56,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [173537743] [2022-01-31 17:35:56,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [173537743] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:35:56,373 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:35:56,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-01-31 17:35:56,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349179224] [2022-01-31 17:35:56,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:35:56,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-31 17:35:56,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:35:56,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-31 17:35:56,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 17:35:56,374 INFO L87 Difference]: Start difference. First operand 200 states and 204 transitions. Second operand has 48 states, 48 states have (on average 1.2916666666666667) internal successors, (62), 47 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:57,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:35:57,416 INFO L93 Difference]: Finished difference Result 353 states and 364 transitions. [2022-01-31 17:35:57,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 17:35:57,423 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.2916666666666667) internal successors, (62), 47 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 195 [2022-01-31 17:35:57,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:35:57,424 INFO L225 Difference]: With dead ends: 353 [2022-01-31 17:35:57,424 INFO L226 Difference]: Without dead ends: 204 [2022-01-31 17:35:57,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3243, Invalid=5313, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 17:35:57,425 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 608 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 608 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:35:57,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 50 Invalid, 869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [608 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:35:57,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-01-31 17:35:57,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2022-01-31 17:35:57,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 198 states have (on average 1.0252525252525253) internal successors, (203), 198 states have internal predecessors, (203), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:35:57,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 208 transitions. [2022-01-31 17:35:57,430 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 208 transitions. Word has length 195 [2022-01-31 17:35:57,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:35:57,431 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 208 transitions. [2022-01-31 17:35:57,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.2916666666666667) internal successors, (62), 47 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:57,431 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 208 transitions. [2022-01-31 17:35:57,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-01-31 17:35:57,432 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:35:57,432 INFO L514 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:35:57,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-01-31 17:35:57,432 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:35:57,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:35:57,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1397961689, now seen corresponding path program 45 times [2022-01-31 17:35:57,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:35:57,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1141276994] [2022-01-31 17:35:57,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:35:57,433 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:35:57,433 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:35:57,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:35:57,438 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:35:57,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:58,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:35:58,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:58,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:35:58,163 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:35:58,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1141276994] [2022-01-31 17:35:58,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1141276994] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:35:58,163 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:35:58,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-01-31 17:35:58,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516047787] [2022-01-31 17:35:58,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:35:58,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-31 17:35:58,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:35:58,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-31 17:35:58,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 17:35:58,165 INFO L87 Difference]: Start difference. First operand 204 states and 208 transitions. Second operand has 49 states, 49 states have (on average 1.2857142857142858) internal successors, (63), 48 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:59,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:35:59,256 INFO L93 Difference]: Finished difference Result 360 states and 371 transitions. [2022-01-31 17:35:59,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 17:35:59,256 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.2857142857142858) internal successors, (63), 48 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 199 [2022-01-31 17:35:59,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:35:59,257 INFO L225 Difference]: With dead ends: 360 [2022-01-31 17:35:59,257 INFO L226 Difference]: Without dead ends: 208 [2022-01-31 17:35:59,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3384, Invalid=5546, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 17:35:59,258 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 638 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 638 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:35:59,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 55 Invalid, 918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [638 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:35:59,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-01-31 17:35:59,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2022-01-31 17:35:59,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 202 states have (on average 1.0247524752475248) internal successors, (207), 202 states have internal predecessors, (207), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:35:59,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 212 transitions. [2022-01-31 17:35:59,263 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 212 transitions. Word has length 199 [2022-01-31 17:35:59,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:35:59,263 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 212 transitions. [2022-01-31 17:35:59,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.2857142857142858) internal successors, (63), 48 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:59,263 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 212 transitions. [2022-01-31 17:35:59,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-01-31 17:35:59,264 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:35:59,264 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:35:59,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-01-31 17:35:59,264 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:35:59,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:35:59,264 INFO L85 PathProgramCache]: Analyzing trace with hash -2131740453, now seen corresponding path program 46 times [2022-01-31 17:35:59,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:35:59,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [341087034] [2022-01-31 17:35:59,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:35:59,265 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:35:59,265 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:35:59,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:35:59,271 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:35:59,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:36:00,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:36:00,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:36:00,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:36:00,025 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:36:00,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [341087034] [2022-01-31 17:36:00,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [341087034] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:36:00,025 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:36:00,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-01-31 17:36:00,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743939247] [2022-01-31 17:36:00,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:36:00,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 17:36:00,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:36:00,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 17:36:00,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 17:36:00,027 INFO L87 Difference]: Start difference. First operand 208 states and 212 transitions. Second operand has 50 states, 50 states have (on average 1.28) internal successors, (64), 49 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:36:01,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:36:01,226 INFO L93 Difference]: Finished difference Result 367 states and 378 transitions. [2022-01-31 17:36:01,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-31 17:36:01,227 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.28) internal successors, (64), 49 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 203 [2022-01-31 17:36:01,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:36:01,227 INFO L225 Difference]: With dead ends: 367 [2022-01-31 17:36:01,227 INFO L226 Difference]: Without dead ends: 212 [2022-01-31 17:36:01,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3528, Invalid=5784, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 17:36:01,229 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 593 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 593 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:36:01,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 45 Invalid, 847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [593 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:36:01,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-01-31 17:36:01,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2022-01-31 17:36:01,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 206 states have (on average 1.0242718446601942) internal successors, (211), 206 states have internal predecessors, (211), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:36:01,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 216 transitions. [2022-01-31 17:36:01,235 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 216 transitions. Word has length 203 [2022-01-31 17:36:01,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:36:01,235 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 216 transitions. [2022-01-31 17:36:01,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.28) internal successors, (64), 49 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:36:01,235 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 216 transitions. [2022-01-31 17:36:01,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-01-31 17:36:01,236 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:36:01,236 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:36:01,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-01-31 17:36:01,236 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:36:01,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:36:01,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1785097447, now seen corresponding path program 47 times [2022-01-31 17:36:01,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:36:01,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [192225162] [2022-01-31 17:36:01,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:36:01,237 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:36:01,237 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:36:01,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:36:01,243 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:36:01,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:36:02,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:36:02,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:36:02,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:36:02,022 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:36:02,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [192225162] [2022-01-31 17:36:02,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [192225162] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:36:02,022 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:36:02,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-01-31 17:36:02,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707993049] [2022-01-31 17:36:02,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:36:02,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-31 17:36:02,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:36:02,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-31 17:36:02,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 17:36:02,023 INFO L87 Difference]: Start difference. First operand 212 states and 216 transitions. Second operand has 51 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 50 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:36:03,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:36:03,248 INFO L93 Difference]: Finished difference Result 374 states and 385 transitions. [2022-01-31 17:36:03,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 17:36:03,248 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 50 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 207 [2022-01-31 17:36:03,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:36:03,249 INFO L225 Difference]: With dead ends: 374 [2022-01-31 17:36:03,249 INFO L226 Difference]: Without dead ends: 216 [2022-01-31 17:36:03,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3675, Invalid=6027, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 17:36:03,250 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 868 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 868 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:36:03,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 50 Invalid, 1141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [868 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:36:03,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-01-31 17:36:03,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2022-01-31 17:36:03,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 210 states have (on average 1.0238095238095237) internal successors, (215), 210 states have internal predecessors, (215), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:36:03,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 220 transitions. [2022-01-31 17:36:03,255 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 220 transitions. Word has length 207 [2022-01-31 17:36:03,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:36:03,255 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 220 transitions. [2022-01-31 17:36:03,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 50 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:36:03,255 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 220 transitions. [2022-01-31 17:36:03,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-01-31 17:36:03,256 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:36:03,256 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:36:03,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-01-31 17:36:03,256 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:36:03,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:36:03,257 INFO L85 PathProgramCache]: Analyzing trace with hash 897978139, now seen corresponding path program 48 times [2022-01-31 17:36:03,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:36:03,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [521597761] [2022-01-31 17:36:03,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:36:03,257 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:36:03,257 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:36:03,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:36:03,283 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:36:03,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:36:04,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:36:04,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:36:04,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:36:04,106 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:36:04,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [521597761] [2022-01-31 17:36:04,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [521597761] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:36:04,106 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:36:04,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-01-31 17:36:04,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552506553] [2022-01-31 17:36:04,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:36:04,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-01-31 17:36:04,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:36:04,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-01-31 17:36:04,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 17:36:04,107 INFO L87 Difference]: Start difference. First operand 216 states and 220 transitions. Second operand has 52 states, 52 states have (on average 1.2692307692307692) internal successors, (66), 51 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:36:05,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:36:05,299 INFO L93 Difference]: Finished difference Result 381 states and 392 transitions. [2022-01-31 17:36:05,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-31 17:36:05,299 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.2692307692307692) internal successors, (66), 51 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 211 [2022-01-31 17:36:05,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:36:05,300 INFO L225 Difference]: With dead ends: 381 [2022-01-31 17:36:05,300 INFO L226 Difference]: Without dead ends: 220 [2022-01-31 17:36:05,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3825, Invalid=6275, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 17:36:05,302 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 719 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 719 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:36:05,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 40 Invalid, 966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [719 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:36:05,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-01-31 17:36:05,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 220. [2022-01-31 17:36:05,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 214 states have (on average 1.0233644859813085) internal successors, (219), 214 states have internal predecessors, (219), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:36:05,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 224 transitions. [2022-01-31 17:36:05,306 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 224 transitions. Word has length 211 [2022-01-31 17:36:05,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:36:05,307 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 224 transitions. [2022-01-31 17:36:05,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.2692307692307692) internal successors, (66), 51 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:36:05,307 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 224 transitions. [2022-01-31 17:36:05,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-01-31 17:36:05,307 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:36:05,307 INFO L514 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:36:05,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-01-31 17:36:05,308 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:36:05,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:36:05,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1070742951, now seen corresponding path program 49 times [2022-01-31 17:36:05,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:36:05,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2129534417] [2022-01-31 17:36:05,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:36:05,309 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:36:05,309 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:36:05,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:36:05,314 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:36:05,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:36:06,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:36:06,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:36:06,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:36:06,192 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:36:06,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2129534417] [2022-01-31 17:36:06,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2129534417] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:36:06,192 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:36:06,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-01-31 17:36:06,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825725689] [2022-01-31 17:36:06,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:36:06,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-31 17:36:06,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:36:06,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-31 17:36:06,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 17:36:06,193 INFO L87 Difference]: Start difference. First operand 220 states and 224 transitions. Second operand has 53 states, 53 states have (on average 1.2641509433962264) internal successors, (67), 52 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:36:07,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:36:07,444 INFO L93 Difference]: Finished difference Result 388 states and 399 transitions. [2022-01-31 17:36:07,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-31 17:36:07,445 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.2641509433962264) internal successors, (67), 52 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 215 [2022-01-31 17:36:07,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:36:07,445 INFO L225 Difference]: With dead ends: 388 [2022-01-31 17:36:07,445 INFO L226 Difference]: Without dead ends: 224 [2022-01-31 17:36:07,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3978, Invalid=6528, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 17:36:07,448 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 684 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 684 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:36:07,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 60 Invalid, 995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [684 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:36:07,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-01-31 17:36:07,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 224. [2022-01-31 17:36:07,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 218 states have (on average 1.0229357798165137) internal successors, (223), 218 states have internal predecessors, (223), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:36:07,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 228 transitions. [2022-01-31 17:36:07,466 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 228 transitions. Word has length 215 [2022-01-31 17:36:07,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:36:07,466 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 228 transitions. [2022-01-31 17:36:07,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.2641509433962264) internal successors, (67), 52 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:36:07,466 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 228 transitions. [2022-01-31 17:36:07,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-01-31 17:36:07,466 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:36:07,467 INFO L514 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:36:07,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-01-31 17:36:07,467 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:36:07,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:36:07,467 INFO L85 PathProgramCache]: Analyzing trace with hash -697281189, now seen corresponding path program 50 times [2022-01-31 17:36:07,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:36:07,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [808057270] [2022-01-31 17:36:07,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:36:07,468 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:36:07,468 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:36:07,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:36:07,473 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:36:07,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:36:08,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:36:08,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:36:08,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:36:08,366 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:36:08,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [808057270] [2022-01-31 17:36:08,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [808057270] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:36:08,366 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:36:08,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-01-31 17:36:08,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942811276] [2022-01-31 17:36:08,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:36:08,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-01-31 17:36:08,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:36:08,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-01-31 17:36:08,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 17:36:08,367 INFO L87 Difference]: Start difference. First operand 224 states and 228 transitions. Second operand has 54 states, 54 states have (on average 1.2592592592592593) internal successors, (68), 53 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:36:09,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:36:09,729 INFO L93 Difference]: Finished difference Result 395 states and 406 transitions. [2022-01-31 17:36:09,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-31 17:36:09,729 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.2592592592592593) internal successors, (68), 53 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 219 [2022-01-31 17:36:09,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:36:09,729 INFO L225 Difference]: With dead ends: 395 [2022-01-31 17:36:09,730 INFO L226 Difference]: Without dead ends: 228 [2022-01-31 17:36:09,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1325 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=4134, Invalid=6786, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 17:36:09,731 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 954 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 954 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:36:09,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 55 Invalid, 1254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [954 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:36:09,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-01-31 17:36:09,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 228. [2022-01-31 17:36:09,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 222 states have (on average 1.0225225225225225) internal successors, (227), 222 states have internal predecessors, (227), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:36:09,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 232 transitions. [2022-01-31 17:36:09,736 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 232 transitions. Word has length 219 [2022-01-31 17:36:09,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:36:09,736 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 232 transitions. [2022-01-31 17:36:09,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.2592592592592593) internal successors, (68), 53 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:36:09,736 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 232 transitions. [2022-01-31 17:36:09,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2022-01-31 17:36:09,737 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:36:09,737 INFO L514 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:36:09,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-01-31 17:36:09,737 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:36:09,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:36:09,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1539849831, now seen corresponding path program 51 times [2022-01-31 17:36:09,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:36:09,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1635494833] [2022-01-31 17:36:09,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:36:09,738 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:36:09,738 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:36:09,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:36:09,744 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:36:09,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:36:10,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:36:10,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:36:10,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:36:10,635 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:36:10,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1635494833] [2022-01-31 17:36:10,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1635494833] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:36:10,635 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:36:10,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-01-31 17:36:10,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528333374] [2022-01-31 17:36:10,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:36:10,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-01-31 17:36:10,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:36:10,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-01-31 17:36:10,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 17:36:10,636 INFO L87 Difference]: Start difference. First operand 228 states and 232 transitions. Second operand has 55 states, 55 states have (on average 1.2545454545454546) internal successors, (69), 54 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:36:11,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:36:11,984 INFO L93 Difference]: Finished difference Result 402 states and 413 transitions. [2022-01-31 17:36:11,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-31 17:36:11,985 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.2545454545454546) internal successors, (69), 54 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 223 [2022-01-31 17:36:11,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:36:11,985 INFO L225 Difference]: With dead ends: 402 [2022-01-31 17:36:11,985 INFO L226 Difference]: Without dead ends: 232 [2022-01-31 17:36:11,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4293, Invalid=7049, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 17:36:11,986 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 772 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 772 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:36:11,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 45 Invalid, 1046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [772 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:36:11,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-01-31 17:36:11,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 232. [2022-01-31 17:36:11,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 226 states have (on average 1.0221238938053097) internal successors, (231), 226 states have internal predecessors, (231), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:36:11,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 236 transitions. [2022-01-31 17:36:11,991 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 236 transitions. Word has length 223 [2022-01-31 17:36:11,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:36:11,991 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 236 transitions. [2022-01-31 17:36:11,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.2545454545454546) internal successors, (69), 54 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:36:11,992 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 236 transitions. [2022-01-31 17:36:11,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2022-01-31 17:36:11,992 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:36:11,992 INFO L514 BasicCegarLoop]: trace histogram [52, 52, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:36:11,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-01-31 17:36:11,992 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:36:11,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:36:11,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1155992475, now seen corresponding path program 52 times [2022-01-31 17:36:11,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:36:11,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [535491644] [2022-01-31 17:36:11,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:36:11,994 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:36:11,994 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:36:11,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:36:11,999 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:36:12,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:36:12,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:36:12,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:36:12,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:36:12,944 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:36:12,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [535491644] [2022-01-31 17:36:12,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [535491644] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:36:12,944 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:36:12,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-01-31 17:36:12,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205807001] [2022-01-31 17:36:12,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:36:12,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-31 17:36:12,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:36:12,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-31 17:36:12,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 17:36:12,946 INFO L87 Difference]: Start difference. First operand 232 states and 236 transitions. Second operand has 56 states, 56 states have (on average 1.25) internal successors, (70), 55 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:36:14,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:36:14,340 INFO L93 Difference]: Finished difference Result 409 states and 420 transitions. [2022-01-31 17:36:14,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-31 17:36:14,340 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.25) internal successors, (70), 55 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 227 [2022-01-31 17:36:14,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:36:14,341 INFO L225 Difference]: With dead ends: 409 [2022-01-31 17:36:14,341 INFO L226 Difference]: Without dead ends: 236 [2022-01-31 17:36:14,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4455, Invalid=7317, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 17:36:14,342 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 731 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 731 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:36:14,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 55 Invalid, 1039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [731 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:36:14,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-01-31 17:36:14,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2022-01-31 17:36:14,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 230 states have (on average 1.0217391304347827) internal successors, (235), 230 states have internal predecessors, (235), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:36:14,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 240 transitions. [2022-01-31 17:36:14,347 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 240 transitions. Word has length 227 [2022-01-31 17:36:14,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:36:14,347 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 240 transitions. [2022-01-31 17:36:14,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.25) internal successors, (70), 55 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:36:14,347 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 240 transitions. [2022-01-31 17:36:14,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2022-01-31 17:36:14,348 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:36:14,348 INFO L514 BasicCegarLoop]: trace histogram [53, 53, 53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:36:14,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-01-31 17:36:14,348 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:36:14,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:36:14,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1042312999, now seen corresponding path program 53 times [2022-01-31 17:36:14,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:36:14,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [308341861] [2022-01-31 17:36:14,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:36:14,349 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:36:14,349 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:36:14,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:36:14,355 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:36:14,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:36:15,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:36:15,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:36:15,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:36:15,294 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:36:15,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [308341861] [2022-01-31 17:36:15,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [308341861] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:36:15,294 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:36:15,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-01-31 17:36:15,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762470746] [2022-01-31 17:36:15,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:36:15,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-01-31 17:36:15,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:36:15,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-01-31 17:36:15,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 17:36:15,296 INFO L87 Difference]: Start difference. First operand 236 states and 240 transitions. Second operand has 57 states, 57 states have (on average 1.2456140350877194) internal successors, (71), 56 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:36:16,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:36:16,775 INFO L93 Difference]: Finished difference Result 416 states and 427 transitions. [2022-01-31 17:36:16,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 17:36:16,776 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.2456140350877194) internal successors, (71), 56 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 231 [2022-01-31 17:36:16,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:36:16,776 INFO L225 Difference]: With dead ends: 416 [2022-01-31 17:36:16,776 INFO L226 Difference]: Without dead ends: 240 [2022-01-31 17:36:16,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1484 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4620, Invalid=7590, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 17:36:16,777 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 872 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 1124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 872 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:36:16,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 35 Invalid, 1124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [872 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:36:16,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-01-31 17:36:16,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2022-01-31 17:36:16,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 234 states have (on average 1.0213675213675213) internal successors, (239), 234 states have internal predecessors, (239), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:36:16,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 244 transitions. [2022-01-31 17:36:16,783 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 244 transitions. Word has length 231 [2022-01-31 17:36:16,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:36:16,783 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 244 transitions. [2022-01-31 17:36:16,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.2456140350877194) internal successors, (71), 56 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:36:16,783 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 244 transitions. [2022-01-31 17:36:16,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-01-31 17:36:16,784 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:36:16,784 INFO L514 BasicCegarLoop]: trace histogram [54, 54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:36:16,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-01-31 17:36:16,784 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:36:16,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:36:16,784 INFO L85 PathProgramCache]: Analyzing trace with hash -2094911013, now seen corresponding path program 54 times [2022-01-31 17:36:16,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:36:16,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [392777166] [2022-01-31 17:36:16,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:36:16,786 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:36:16,786 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:36:16,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:36:16,794 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:36:16,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:36:17,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:36:17,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:36:17,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:36:17,783 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:36:17,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [392777166] [2022-01-31 17:36:17,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [392777166] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:36:17,783 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:36:17,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-01-31 17:36:17,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345719749] [2022-01-31 17:36:17,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:36:17,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-01-31 17:36:17,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:36:17,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-01-31 17:36:17,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 17:36:17,784 INFO L87 Difference]: Start difference. First operand 240 states and 244 transitions. Second operand has 58 states, 58 states have (on average 1.2413793103448276) internal successors, (72), 57 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:36:19,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:36:19,314 INFO L93 Difference]: Finished difference Result 423 states and 434 transitions. [2022-01-31 17:36:19,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-31 17:36:19,314 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.2413793103448276) internal successors, (72), 57 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 235 [2022-01-31 17:36:19,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:36:19,315 INFO L225 Difference]: With dead ends: 423 [2022-01-31 17:36:19,315 INFO L226 Difference]: Without dead ends: 244 [2022-01-31 17:36:19,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4788, Invalid=7868, Unknown=0, NotChecked=0, Total=12656 [2022-01-31 17:36:19,316 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 713 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 1089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 713 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:36:19,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 75 Invalid, 1089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [713 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:36:19,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-01-31 17:36:19,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 244. [2022-01-31 17:36:19,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 238 states have (on average 1.0210084033613445) internal successors, (243), 238 states have internal predecessors, (243), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:36:19,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 248 transitions. [2022-01-31 17:36:19,321 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 248 transitions. Word has length 235 [2022-01-31 17:36:19,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:36:19,321 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 248 transitions. [2022-01-31 17:36:19,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.2413793103448276) internal successors, (72), 57 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:36:19,321 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 248 transitions. [2022-01-31 17:36:19,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-01-31 17:36:19,322 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:36:19,322 INFO L514 BasicCegarLoop]: trace histogram [55, 55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:36:19,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-01-31 17:36:19,322 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:36:19,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:36:19,323 INFO L85 PathProgramCache]: Analyzing trace with hash -934465511, now seen corresponding path program 55 times [2022-01-31 17:36:19,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:36:19,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1092868542] [2022-01-31 17:36:19,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:36:19,324 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:36:19,324 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:36:19,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:36:19,331 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:36:19,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:36:20,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:36:20,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:36:20,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:36:20,356 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:36:20,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1092868542] [2022-01-31 17:36:20,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1092868542] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:36:20,356 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:36:20,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-01-31 17:36:20,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20326841] [2022-01-31 17:36:20,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:36:20,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-01-31 17:36:20,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:36:20,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-01-31 17:36:20,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 17:36:20,357 INFO L87 Difference]: Start difference. First operand 244 states and 248 transitions. Second operand has 59 states, 59 states have (on average 1.2372881355932204) internal successors, (73), 58 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:36:21,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:36:21,917 INFO L93 Difference]: Finished difference Result 430 states and 441 transitions. [2022-01-31 17:36:21,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-31 17:36:21,918 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.2372881355932204) internal successors, (73), 58 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 239 [2022-01-31 17:36:21,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:36:21,918 INFO L225 Difference]: With dead ends: 430 [2022-01-31 17:36:21,919 INFO L226 Difference]: Without dead ends: 248 [2022-01-31 17:36:21,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=4959, Invalid=8151, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 17:36:21,920 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 739 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 1074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 739 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:36:21,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 60 Invalid, 1074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [739 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:36:21,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-01-31 17:36:21,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 248. [2022-01-31 17:36:21,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 242 states have (on average 1.0206611570247934) internal successors, (247), 242 states have internal predecessors, (247), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:36:21,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 252 transitions. [2022-01-31 17:36:21,925 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 252 transitions. Word has length 239 [2022-01-31 17:36:21,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:36:21,925 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 252 transitions. [2022-01-31 17:36:21,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.2372881355932204) internal successors, (73), 58 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:36:21,925 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 252 transitions. [2022-01-31 17:36:21,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-01-31 17:36:21,926 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:36:21,926 INFO L514 BasicCegarLoop]: trace histogram [56, 56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:36:21,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-01-31 17:36:21,926 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:36:21,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:36:21,926 INFO L85 PathProgramCache]: Analyzing trace with hash 878299163, now seen corresponding path program 56 times [2022-01-31 17:36:21,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:36:21,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [105796251] [2022-01-31 17:36:21,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:36:21,927 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:36:21,927 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:36:21,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:36:21,934 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:36:21,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:36:23,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:36:23,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:36:23,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:36:23,096 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:36:23,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [105796251] [2022-01-31 17:36:23,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [105796251] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:36:23,097 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:36:23,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-01-31 17:36:23,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173456478] [2022-01-31 17:36:23,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:36:23,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-01-31 17:36:23,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:36:23,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-01-31 17:36:23,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 17:36:23,099 INFO L87 Difference]: Start difference. First operand 248 states and 252 transitions. Second operand has 60 states, 60 states have (on average 1.2333333333333334) internal successors, (74), 59 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:36:24,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:36:24,711 INFO L93 Difference]: Finished difference Result 437 states and 448 transitions. [2022-01-31 17:36:24,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-31 17:36:24,711 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.2333333333333334) internal successors, (74), 59 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 243 [2022-01-31 17:36:24,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:36:24,712 INFO L225 Difference]: With dead ends: 437 [2022-01-31 17:36:24,712 INFO L226 Difference]: Without dead ends: 252 [2022-01-31 17:36:24,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1652 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=5133, Invalid=8439, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 17:36:24,713 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 831 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 831 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:36:24,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 45 Invalid, 1125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [831 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:36:24,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-01-31 17:36:24,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 252. [2022-01-31 17:36:24,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 246 states have (on average 1.0203252032520325) internal successors, (251), 246 states have internal predecessors, (251), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:36:24,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 256 transitions. [2022-01-31 17:36:24,718 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 256 transitions. Word has length 243 [2022-01-31 17:36:24,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:36:24,718 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 256 transitions. [2022-01-31 17:36:24,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.2333333333333334) internal successors, (74), 59 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:36:24,718 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 256 transitions. [2022-01-31 17:36:24,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2022-01-31 17:36:24,719 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:36:24,719 INFO L514 BasicCegarLoop]: trace histogram [57, 57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:36:24,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-01-31 17:36:24,719 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:36:24,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:36:24,719 INFO L85 PathProgramCache]: Analyzing trace with hash 363372377, now seen corresponding path program 57 times [2022-01-31 17:36:24,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:36:24,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1772426362] [2022-01-31 17:36:24,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:36:24,720 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:36:24,720 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:36:24,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:36:24,727 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:36:24,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:36:25,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:36:25,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:36:25,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:36:25,808 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:36:25,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1772426362] [2022-01-31 17:36:25,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1772426362] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:36:25,808 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:36:25,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-01-31 17:36:25,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607654842] [2022-01-31 17:36:25,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:36:25,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-01-31 17:36:25,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:36:25,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-01-31 17:36:25,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 17:36:25,810 INFO L87 Difference]: Start difference. First operand 252 states and 256 transitions. Second operand has 61 states, 61 states have (on average 1.2295081967213115) internal successors, (75), 60 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:36:27,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:36:27,489 INFO L93 Difference]: Finished difference Result 444 states and 455 transitions. [2022-01-31 17:36:27,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-31 17:36:27,490 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.2295081967213115) internal successors, (75), 60 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 247 [2022-01-31 17:36:27,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:36:27,490 INFO L225 Difference]: With dead ends: 444 [2022-01-31 17:36:27,490 INFO L226 Difference]: Without dead ends: 256 [2022-01-31 17:36:27,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1710 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=5310, Invalid=8732, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 17:36:27,491 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 915 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 915 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:36:27,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 40 Invalid, 1198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [915 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:36:27,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-01-31 17:36:27,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2022-01-31 17:36:27,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 250 states have (on average 1.02) internal successors, (255), 250 states have internal predecessors, (255), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:36:27,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 260 transitions. [2022-01-31 17:36:27,498 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 260 transitions. Word has length 247 [2022-01-31 17:36:27,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:36:27,498 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 260 transitions. [2022-01-31 17:36:27,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.2295081967213115) internal successors, (75), 60 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:36:27,498 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 260 transitions. [2022-01-31 17:36:27,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2022-01-31 17:36:27,499 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:36:27,499 INFO L514 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:36:27,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-01-31 17:36:27,499 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:36:27,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:36:27,499 INFO L85 PathProgramCache]: Analyzing trace with hash 482725467, now seen corresponding path program 58 times [2022-01-31 17:36:27,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:36:27,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1172309628] [2022-01-31 17:36:27,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:36:27,500 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:36:27,500 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:36:27,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:36:27,508 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:36:27,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:36:28,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:36:28,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:36:28,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:36:28,629 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:36:28,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1172309628] [2022-01-31 17:36:28,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1172309628] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:36:28,629 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:36:28,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-01-31 17:36:28,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302147595] [2022-01-31 17:36:28,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:36:28,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-01-31 17:36:28,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:36:28,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-01-31 17:36:28,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 17:36:28,630 INFO L87 Difference]: Start difference. First operand 256 states and 260 transitions. Second operand has 62 states, 62 states have (on average 1.2258064516129032) internal successors, (76), 61 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:36:30,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:36:30,323 INFO L93 Difference]: Finished difference Result 451 states and 462 transitions. [2022-01-31 17:36:30,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-31 17:36:30,324 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.2258064516129032) internal successors, (76), 61 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 251 [2022-01-31 17:36:30,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:36:30,324 INFO L225 Difference]: With dead ends: 451 [2022-01-31 17:36:30,325 INFO L226 Difference]: Without dead ends: 260 [2022-01-31 17:36:30,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1769 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=5490, Invalid=9030, Unknown=0, NotChecked=0, Total=14520 [2022-01-31 17:36:30,326 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 899 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 1171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 899 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:36:30,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 35 Invalid, 1171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [899 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:36:30,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-01-31 17:36:30,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 260. [2022-01-31 17:36:30,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 254 states have (on average 1.0196850393700787) internal successors, (259), 254 states have internal predecessors, (259), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:36:30,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 264 transitions. [2022-01-31 17:36:30,335 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 264 transitions. Word has length 251 [2022-01-31 17:36:30,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:36:30,335 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 264 transitions. [2022-01-31 17:36:30,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.2258064516129032) internal successors, (76), 61 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:36:30,335 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 264 transitions. [2022-01-31 17:36:30,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2022-01-31 17:36:30,336 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:36:30,336 INFO L514 BasicCegarLoop]: trace histogram [59, 59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:36:30,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-01-31 17:36:30,336 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:36:30,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:36:30,337 INFO L85 PathProgramCache]: Analyzing trace with hash 924442265, now seen corresponding path program 59 times [2022-01-31 17:36:30,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:36:30,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1949773327] [2022-01-31 17:36:30,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:36:30,338 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:36:30,338 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:36:30,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:36:30,345 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:36:30,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:36:31,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:36:31,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:36:31,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:36:31,504 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:36:31,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1949773327] [2022-01-31 17:36:31,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1949773327] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:36:31,504 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:36:31,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-01-31 17:36:31,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491132219] [2022-01-31 17:36:31,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:36:31,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-01-31 17:36:31,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:36:31,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-01-31 17:36:31,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 17:36:31,505 INFO L87 Difference]: Start difference. First operand 260 states and 264 transitions. Second operand has 63 states, 63 states have (on average 1.2222222222222223) internal successors, (77), 62 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:36:33,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:36:33,278 INFO L93 Difference]: Finished difference Result 458 states and 469 transitions. [2022-01-31 17:36:33,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-31 17:36:33,278 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.2222222222222223) internal successors, (77), 62 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 255 [2022-01-31 17:36:33,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:36:33,279 INFO L225 Difference]: With dead ends: 458 [2022-01-31 17:36:33,279 INFO L226 Difference]: Without dead ends: 264 [2022-01-31 17:36:33,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1829 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=5673, Invalid=9333, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 17:36:33,280 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 817 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 1198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 817 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:36:33,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 70 Invalid, 1198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [817 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:36:33,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-01-31 17:36:33,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 264. [2022-01-31 17:36:33,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 258 states have (on average 1.0193798449612403) internal successors, (263), 258 states have internal predecessors, (263), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:36:33,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 268 transitions. [2022-01-31 17:36:33,286 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 268 transitions. Word has length 255 [2022-01-31 17:36:33,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:36:33,286 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 268 transitions. [2022-01-31 17:36:33,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.2222222222222223) internal successors, (77), 62 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:36:33,286 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 268 transitions. [2022-01-31 17:36:33,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2022-01-31 17:36:33,287 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:36:33,287 INFO L514 BasicCegarLoop]: trace histogram [60, 60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:36:33,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-01-31 17:36:33,287 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:36:33,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:36:33,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1583463269, now seen corresponding path program 60 times [2022-01-31 17:36:33,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:36:33,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [268809000] [2022-01-31 17:36:33,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:36:33,288 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:36:33,288 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:36:33,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:36:33,296 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:36:33,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:36:34,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:36:34,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:36:34,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:36:34,539 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:36:34,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [268809000] [2022-01-31 17:36:34,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [268809000] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:36:34,539 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:36:34,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-01-31 17:36:34,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360644512] [2022-01-31 17:36:34,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:36:34,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-01-31 17:36:34,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:36:34,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-01-31 17:36:34,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 17:36:34,540 INFO L87 Difference]: Start difference. First operand 264 states and 268 transitions. Second operand has 64 states, 64 states have (on average 1.21875) internal successors, (78), 63 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:36:36,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:36:36,474 INFO L93 Difference]: Finished difference Result 465 states and 476 transitions. [2022-01-31 17:36:36,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-31 17:36:36,474 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.21875) internal successors, (78), 63 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 259 [2022-01-31 17:36:36,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:36:36,485 INFO L225 Difference]: With dead ends: 465 [2022-01-31 17:36:36,486 INFO L226 Difference]: Without dead ends: 268 [2022-01-31 17:36:36,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1890 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=5859, Invalid=9641, Unknown=0, NotChecked=0, Total=15500 [2022-01-31 17:36:36,488 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 1294 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 1574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1294 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:36:36,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 35 Invalid, 1574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1294 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:36:36,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-01-31 17:36:36,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 268. [2022-01-31 17:36:36,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 262 states have (on average 1.0190839694656488) internal successors, (267), 262 states have internal predecessors, (267), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:36:36,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 272 transitions. [2022-01-31 17:36:36,493 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 272 transitions. Word has length 259 [2022-01-31 17:36:36,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:36:36,494 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 272 transitions. [2022-01-31 17:36:36,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.21875) internal successors, (78), 63 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:36:36,494 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 272 transitions. [2022-01-31 17:36:36,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2022-01-31 17:36:36,495 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:36:36,495 INFO L514 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:36:36,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-01-31 17:36:36,495 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:36:36,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:36:36,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1757998553, now seen corresponding path program 61 times [2022-01-31 17:36:36,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:36:36,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1685408421] [2022-01-31 17:36:36,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:36:36,496 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:36:36,497 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:36:36,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:36:36,507 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:36:36,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:36:37,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:36:37,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:36:37,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:36:37,847 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:36:37,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1685408421] [2022-01-31 17:36:37,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1685408421] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:36:37,847 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:36:37,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-01-31 17:36:37,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961453510] [2022-01-31 17:36:37,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:36:37,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-01-31 17:36:37,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:36:37,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-01-31 17:36:37,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 17:36:37,849 INFO L87 Difference]: Start difference. First operand 268 states and 272 transitions. Second operand has 65 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 64 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:36:39,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:36:39,722 INFO L93 Difference]: Finished difference Result 472 states and 483 transitions. [2022-01-31 17:36:39,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-31 17:36:39,722 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 64 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 263 [2022-01-31 17:36:39,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:36:39,723 INFO L225 Difference]: With dead ends: 472 [2022-01-31 17:36:39,723 INFO L226 Difference]: Without dead ends: 272 [2022-01-31 17:36:39,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1952 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=6048, Invalid=9954, Unknown=0, NotChecked=0, Total=16002 [2022-01-31 17:36:39,724 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 981 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 981 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:36:39,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 45 Invalid, 1295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [981 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:36:39,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-01-31 17:36:39,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 272. [2022-01-31 17:36:39,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 266 states have (on average 1.018796992481203) internal successors, (271), 266 states have internal predecessors, (271), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:36:39,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 276 transitions. [2022-01-31 17:36:39,729 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 276 transitions. Word has length 263 [2022-01-31 17:36:39,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:36:39,729 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 276 transitions. [2022-01-31 17:36:39,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 64 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:36:39,729 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 276 transitions. [2022-01-31 17:36:39,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2022-01-31 17:36:39,730 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:36:39,730 INFO L514 BasicCegarLoop]: trace histogram [62, 62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:36:39,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-01-31 17:36:39,730 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:36:39,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:36:39,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1226517211, now seen corresponding path program 62 times [2022-01-31 17:36:39,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:36:39,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [265347087] [2022-01-31 17:36:39,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:36:39,732 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:36:39,732 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:36:39,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:36:39,741 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:36:39,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:36:41,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:36:41,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:36:41,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:36:41,029 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:36:41,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [265347087] [2022-01-31 17:36:41,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [265347087] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:36:41,029 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:36:41,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-01-31 17:36:41,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500609980] [2022-01-31 17:36:41,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:36:41,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-01-31 17:36:41,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:36:41,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-01-31 17:36:41,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 17:36:41,031 INFO L87 Difference]: Start difference. First operand 272 states and 276 transitions. Second operand has 66 states, 66 states have (on average 1.2121212121212122) internal successors, (80), 65 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:36:42,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:36:42,913 INFO L93 Difference]: Finished difference Result 479 states and 490 transitions. [2022-01-31 17:36:42,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-31 17:36:42,914 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.2121212121212122) internal successors, (80), 65 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 267 [2022-01-31 17:36:42,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:36:42,914 INFO L225 Difference]: With dead ends: 479 [2022-01-31 17:36:42,914 INFO L226 Difference]: Without dead ends: 276 [2022-01-31 17:36:42,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2015 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=6240, Invalid=10272, Unknown=0, NotChecked=0, Total=16512 [2022-01-31 17:36:42,915 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 806 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 1184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 806 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:36:42,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 65 Invalid, 1184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [806 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:36:42,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-01-31 17:36:42,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 276. [2022-01-31 17:36:42,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 270 states have (on average 1.0185185185185186) internal successors, (275), 270 states have internal predecessors, (275), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:36:42,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 280 transitions. [2022-01-31 17:36:42,927 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 280 transitions. Word has length 267 [2022-01-31 17:36:42,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:36:42,927 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 280 transitions. [2022-01-31 17:36:42,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.2121212121212122) internal successors, (80), 65 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:36:42,927 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 280 transitions. [2022-01-31 17:36:42,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2022-01-31 17:36:42,928 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:36:42,928 INFO L514 BasicCegarLoop]: trace histogram [63, 63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:36:42,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-01-31 17:36:42,928 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:36:42,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:36:42,928 INFO L85 PathProgramCache]: Analyzing trace with hash 366857497, now seen corresponding path program 63 times [2022-01-31 17:36:42,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:36:42,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [20499063] [2022-01-31 17:36:42,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:36:42,929 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:36:42,929 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:36:42,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:36:42,938 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:36:43,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:36:44,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:36:44,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:36:44,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:36:44,276 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:36:44,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [20499063] [2022-01-31 17:36:44,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [20499063] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:36:44,276 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:36:44,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-01-31 17:36:44,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805272692] [2022-01-31 17:36:44,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:36:44,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-01-31 17:36:44,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:36:44,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-01-31 17:36:44,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 17:36:44,278 INFO L87 Difference]: Start difference. First operand 276 states and 280 transitions. Second operand has 67 states, 67 states have (on average 1.208955223880597) internal successors, (81), 66 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:36:46,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:36:46,249 INFO L93 Difference]: Finished difference Result 486 states and 497 transitions. [2022-01-31 17:36:46,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-31 17:36:46,249 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.208955223880597) internal successors, (81), 66 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 271 [2022-01-31 17:36:46,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:36:46,250 INFO L225 Difference]: With dead ends: 486 [2022-01-31 17:36:46,250 INFO L226 Difference]: Without dead ends: 280 [2022-01-31 17:36:46,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2079 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=6435, Invalid=10595, Unknown=0, NotChecked=0, Total=17030 [2022-01-31 17:36:46,252 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 885 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 1252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 885 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:36:46,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 60 Invalid, 1252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [885 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:36:46,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-01-31 17:36:46,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 280. [2022-01-31 17:36:46,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 274 states have (on average 1.0182481751824817) internal successors, (279), 274 states have internal predecessors, (279), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:36:46,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 284 transitions. [2022-01-31 17:36:46,262 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 284 transitions. Word has length 271 [2022-01-31 17:36:46,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:36:46,262 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 284 transitions. [2022-01-31 17:36:46,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.208955223880597) internal successors, (81), 66 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:36:46,262 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 284 transitions. [2022-01-31 17:36:46,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2022-01-31 17:36:46,263 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:36:46,263 INFO L514 BasicCegarLoop]: trace histogram [64, 64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:36:46,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-01-31 17:36:46,263 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:36:46,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:36:46,263 INFO L85 PathProgramCache]: Analyzing trace with hash 980713755, now seen corresponding path program 64 times [2022-01-31 17:36:46,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:36:46,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [382554902] [2022-01-31 17:36:46,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:36:46,264 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:36:46,264 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:36:46,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:36:46,272 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:36:46,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:36:47,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:36:47,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:36:47,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:36:47,648 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:36:47,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [382554902] [2022-01-31 17:36:47,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [382554902] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:36:47,648 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:36:47,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-01-31 17:36:47,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589132509] [2022-01-31 17:36:47,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:36:47,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-01-31 17:36:47,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:36:47,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-01-31 17:36:47,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 17:36:47,649 INFO L87 Difference]: Start difference. First operand 280 states and 284 transitions. Second operand has 68 states, 68 states have (on average 1.2058823529411764) internal successors, (82), 67 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:36:49,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:36:49,644 INFO L93 Difference]: Finished difference Result 493 states and 504 transitions. [2022-01-31 17:36:49,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-31 17:36:49,645 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.2058823529411764) internal successors, (82), 67 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 275 [2022-01-31 17:36:49,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:36:49,646 INFO L225 Difference]: With dead ends: 493 [2022-01-31 17:36:49,646 INFO L226 Difference]: Without dead ends: 284 [2022-01-31 17:36:49,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2144 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=6633, Invalid=10923, Unknown=0, NotChecked=0, Total=17556 [2022-01-31 17:36:49,647 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 894 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 894 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:36:49,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 55 Invalid, 1250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [894 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:36:49,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-01-31 17:36:49,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 284. [2022-01-31 17:36:49,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 278 states have (on average 1.0179856115107915) internal successors, (283), 278 states have internal predecessors, (283), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:36:49,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 288 transitions. [2022-01-31 17:36:49,652 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 288 transitions. Word has length 275 [2022-01-31 17:36:49,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:36:49,653 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 288 transitions. [2022-01-31 17:36:49,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.2058823529411764) internal successors, (82), 67 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:36:49,653 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 288 transitions. [2022-01-31 17:36:49,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2022-01-31 17:36:49,654 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:36:49,654 INFO L514 BasicCegarLoop]: trace histogram [65, 65, 65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:36:49,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-01-31 17:36:49,654 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:36:49,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:36:49,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1484815449, now seen corresponding path program 65 times [2022-01-31 17:36:49,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:36:49,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [634660628] [2022-01-31 17:36:49,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:36:49,655 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:36:49,655 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:36:49,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:36:49,663 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:36:49,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:36:51,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:36:51,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:36:51,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:36:51,066 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:36:51,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [634660628] [2022-01-31 17:36:51,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [634660628] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:36:51,066 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:36:51,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-01-31 17:36:51,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758133725] [2022-01-31 17:36:51,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:36:51,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-01-31 17:36:51,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:36:51,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-01-31 17:36:51,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 17:36:51,068 INFO L87 Difference]: Start difference. First operand 284 states and 288 transitions. Second operand has 69 states, 69 states have (on average 1.2028985507246377) internal successors, (83), 68 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:36:53,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:36:53,146 INFO L93 Difference]: Finished difference Result 500 states and 511 transitions. [2022-01-31 17:36:53,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-31 17:36:53,147 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.2028985507246377) internal successors, (83), 68 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 279 [2022-01-31 17:36:53,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:36:53,147 INFO L225 Difference]: With dead ends: 500 [2022-01-31 17:36:53,147 INFO L226 Difference]: Without dead ends: 288 [2022-01-31 17:36:53,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2210 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=6834, Invalid=11256, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 17:36:53,149 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 982 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 982 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:36:53,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 40 Invalid, 1297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [982 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:36:53,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-01-31 17:36:53,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 288. [2022-01-31 17:36:53,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 282 states have (on average 1.0177304964539007) internal successors, (287), 282 states have internal predecessors, (287), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:36:53,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 292 transitions. [2022-01-31 17:36:53,163 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 292 transitions. Word has length 279 [2022-01-31 17:36:53,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:36:53,163 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 292 transitions. [2022-01-31 17:36:53,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.2028985507246377) internal successors, (83), 68 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:36:53,163 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 292 transitions. [2022-01-31 17:36:53,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2022-01-31 17:36:53,164 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:36:53,164 INFO L514 BasicCegarLoop]: trace histogram [66, 66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:36:53,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-01-31 17:36:53,164 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:36:53,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:36:53,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1109244069, now seen corresponding path program 66 times [2022-01-31 17:36:53,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:36:53,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [77711150] [2022-01-31 17:36:53,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:36:53,165 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:36:53,165 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:36:53,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:36:53,175 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:36:53,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:36:54,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:36:54,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:36:54,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:36:54,665 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:36:54,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [77711150] [2022-01-31 17:36:54,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [77711150] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:36:54,665 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:36:54,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-01-31 17:36:54,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230304180] [2022-01-31 17:36:54,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:36:54,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-01-31 17:36:54,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:36:54,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-01-31 17:36:54,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2022-01-31 17:36:54,666 INFO L87 Difference]: Start difference. First operand 288 states and 292 transitions. Second operand has 70 states, 70 states have (on average 1.2) internal successors, (84), 69 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:36:56,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:36:56,775 INFO L93 Difference]: Finished difference Result 507 states and 518 transitions. [2022-01-31 17:36:56,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-31 17:36:56,775 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.2) internal successors, (84), 69 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 283 [2022-01-31 17:36:56,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:36:56,776 INFO L225 Difference]: With dead ends: 507 [2022-01-31 17:36:56,776 INFO L226 Difference]: Without dead ends: 292 [2022-01-31 17:36:56,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2277 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=7038, Invalid=11594, Unknown=0, NotChecked=0, Total=18632 [2022-01-31 17:36:56,778 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 937 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 937 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:36:56,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 55 Invalid, 1301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [937 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:36:56,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2022-01-31 17:36:56,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 292. [2022-01-31 17:36:56,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 286 states have (on average 1.0174825174825175) internal successors, (291), 286 states have internal predecessors, (291), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:36:56,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 296 transitions. [2022-01-31 17:36:56,783 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 296 transitions. Word has length 283 [2022-01-31 17:36:56,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:36:56,784 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 296 transitions. [2022-01-31 17:36:56,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.2) internal successors, (84), 69 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:36:56,784 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 296 transitions. [2022-01-31 17:36:56,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2022-01-31 17:36:56,784 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:36:56,785 INFO L514 BasicCegarLoop]: trace histogram [67, 67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:36:56,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-01-31 17:36:56,785 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:36:56,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:36:56,785 INFO L85 PathProgramCache]: Analyzing trace with hash 2044263321, now seen corresponding path program 67 times [2022-01-31 17:36:56,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:36:56,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1797444656] [2022-01-31 17:36:56,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:36:56,786 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:36:56,786 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:36:56,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:36:56,795 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:36:56,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:36:58,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:36:58,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:36:58,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:36:58,267 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:36:58,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1797444656] [2022-01-31 17:36:58,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1797444656] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:36:58,267 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:36:58,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-01-31 17:36:58,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891957970] [2022-01-31 17:36:58,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:36:58,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-01-31 17:36:58,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:36:58,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-01-31 17:36:58,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 17:36:58,269 INFO L87 Difference]: Start difference. First operand 292 states and 296 transitions. Second operand has 71 states, 71 states have (on average 1.1971830985915493) internal successors, (85), 70 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:37:00,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:37:00,471 INFO L93 Difference]: Finished difference Result 514 states and 525 transitions. [2022-01-31 17:37:00,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-31 17:37:00,471 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.1971830985915493) internal successors, (85), 70 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 287 [2022-01-31 17:37:00,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:37:00,472 INFO L225 Difference]: With dead ends: 514 [2022-01-31 17:37:00,472 INFO L226 Difference]: Without dead ends: 296 [2022-01-31 17:37:00,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2345 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=7245, Invalid=11937, Unknown=0, NotChecked=0, Total=19182 [2022-01-31 17:37:00,473 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 996 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 996 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:37:00,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 50 Invalid, 1349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [996 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:37:00,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-01-31 17:37:00,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 296. [2022-01-31 17:37:00,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 290 states have (on average 1.0172413793103448) internal successors, (295), 290 states have internal predecessors, (295), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:37:00,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 300 transitions. [2022-01-31 17:37:00,479 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 300 transitions. Word has length 287 [2022-01-31 17:37:00,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:37:00,479 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 300 transitions. [2022-01-31 17:37:00,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.1971830985915493) internal successors, (85), 70 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:37:00,479 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 300 transitions. [2022-01-31 17:37:00,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2022-01-31 17:37:00,480 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:37:00,480 INFO L514 BasicCegarLoop]: trace histogram [68, 68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:37:00,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-01-31 17:37:00,480 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:37:00,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:37:00,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1130594917, now seen corresponding path program 68 times [2022-01-31 17:37:00,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:37:00,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [491845841] [2022-01-31 17:37:00,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:37:00,481 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:37:00,481 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:37:00,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:37:00,492 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:37:00,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:37:02,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:37:02,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:37:02,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:37:02,010 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:37:02,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [491845841] [2022-01-31 17:37:02,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [491845841] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:37:02,010 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:37:02,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-01-31 17:37:02,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091044196] [2022-01-31 17:37:02,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:37:02,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-01-31 17:37:02,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:37:02,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-01-31 17:37:02,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 17:37:02,012 INFO L87 Difference]: Start difference. First operand 296 states and 300 transitions. Second operand has 72 states, 72 states have (on average 1.1944444444444444) internal successors, (86), 71 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:37:04,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:37:04,380 INFO L93 Difference]: Finished difference Result 521 states and 532 transitions. [2022-01-31 17:37:04,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-31 17:37:04,380 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.1944444444444444) internal successors, (86), 71 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 291 [2022-01-31 17:37:04,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:37:04,381 INFO L225 Difference]: With dead ends: 521 [2022-01-31 17:37:04,381 INFO L226 Difference]: Without dead ends: 300 [2022-01-31 17:37:04,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2414 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=7455, Invalid=12285, Unknown=0, NotChecked=0, Total=19740 [2022-01-31 17:37:04,382 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 1056 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1056 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:37:04,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 50 Invalid, 1413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1056 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:37:04,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2022-01-31 17:37:04,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 300. [2022-01-31 17:37:04,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 294 states have (on average 1.0170068027210883) internal successors, (299), 294 states have internal predecessors, (299), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:37:04,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 304 transitions. [2022-01-31 17:37:04,388 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 304 transitions. Word has length 291 [2022-01-31 17:37:04,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:37:04,388 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 304 transitions. [2022-01-31 17:37:04,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.1944444444444444) internal successors, (86), 71 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:37:04,388 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 304 transitions. [2022-01-31 17:37:04,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2022-01-31 17:37:04,389 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:37:04,389 INFO L514 BasicCegarLoop]: trace histogram [69, 69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:37:04,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-01-31 17:37:04,389 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:37:04,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:37:04,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1913604825, now seen corresponding path program 69 times [2022-01-31 17:37:04,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:37:04,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [867393723] [2022-01-31 17:37:04,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:37:04,390 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:37:04,390 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:37:04,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:37:04,401 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:37:04,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:37:05,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:37:05,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:37:05,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:37:05,953 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:37:05,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [867393723] [2022-01-31 17:37:05,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [867393723] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:37:05,953 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:37:05,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-01-31 17:37:05,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040321050] [2022-01-31 17:37:05,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:37:05,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-01-31 17:37:05,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:37:05,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-01-31 17:37:05,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 17:37:05,955 INFO L87 Difference]: Start difference. First operand 300 states and 304 transitions. Second operand has 73 states, 73 states have (on average 1.1917808219178083) internal successors, (87), 72 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:37:08,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:37:08,308 INFO L93 Difference]: Finished difference Result 528 states and 539 transitions. [2022-01-31 17:37:08,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-31 17:37:08,309 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.1917808219178083) internal successors, (87), 72 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 295 [2022-01-31 17:37:08,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:37:08,310 INFO L225 Difference]: With dead ends: 528 [2022-01-31 17:37:08,310 INFO L226 Difference]: Without dead ends: 304 [2022-01-31 17:37:08,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2484 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=7668, Invalid=12638, Unknown=0, NotChecked=0, Total=20306 [2022-01-31 17:37:08,311 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 969 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 969 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:37:08,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 55 Invalid, 1345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [969 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:37:08,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-01-31 17:37:08,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 304. [2022-01-31 17:37:08,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 298 states have (on average 1.016778523489933) internal successors, (303), 298 states have internal predecessors, (303), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:37:08,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 308 transitions. [2022-01-31 17:37:08,318 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 308 transitions. Word has length 295 [2022-01-31 17:37:08,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:37:08,318 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 308 transitions. [2022-01-31 17:37:08,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.1917808219178083) internal successors, (87), 72 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:37:08,318 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 308 transitions. [2022-01-31 17:37:08,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2022-01-31 17:37:08,319 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:37:08,319 INFO L514 BasicCegarLoop]: trace histogram [70, 70, 70, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:37:08,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-01-31 17:37:08,319 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:37:08,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:37:08,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1088103387, now seen corresponding path program 70 times [2022-01-31 17:37:08,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:37:08,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1092404824] [2022-01-31 17:37:08,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:37:08,320 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:37:08,320 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:37:08,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:37:08,331 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:37:08,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:37:09,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:37:09,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:37:09,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:37:09,927 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:37:09,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1092404824] [2022-01-31 17:37:09,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1092404824] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:37:09,928 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:37:09,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-01-31 17:37:09,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981805362] [2022-01-31 17:37:09,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:37:09,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-01-31 17:37:09,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:37:09,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-01-31 17:37:09,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 17:37:09,929 INFO L87 Difference]: Start difference. First operand 304 states and 308 transitions. Second operand has 74 states, 74 states have (on average 1.1891891891891893) internal successors, (88), 73 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:37:12,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:37:12,371 INFO L93 Difference]: Finished difference Result 535 states and 546 transitions. [2022-01-31 17:37:12,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-31 17:37:12,375 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.1891891891891893) internal successors, (88), 73 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 299 [2022-01-31 17:37:12,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:37:12,375 INFO L225 Difference]: With dead ends: 535 [2022-01-31 17:37:12,375 INFO L226 Difference]: Without dead ends: 308 [2022-01-31 17:37:12,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2555 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=7884, Invalid=12996, Unknown=0, NotChecked=0, Total=20880 [2022-01-31 17:37:12,377 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 1043 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1043 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:37:12,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 55 Invalid, 1423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1043 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:37:12,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-01-31 17:37:12,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 308. [2022-01-31 17:37:12,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 302 states have (on average 1.0165562913907285) internal successors, (307), 302 states have internal predecessors, (307), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:37:12,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 312 transitions. [2022-01-31 17:37:12,382 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 312 transitions. Word has length 299 [2022-01-31 17:37:12,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:37:12,383 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 312 transitions. [2022-01-31 17:37:12,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.1891891891891893) internal successors, (88), 73 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:37:12,383 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 312 transitions. [2022-01-31 17:37:12,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2022-01-31 17:37:12,384 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:37:12,384 INFO L514 BasicCegarLoop]: trace histogram [71, 71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:37:12,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-01-31 17:37:12,384 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:37:12,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:37:12,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1749772825, now seen corresponding path program 71 times [2022-01-31 17:37:12,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:37:12,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1839612187] [2022-01-31 17:37:12,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:37:12,385 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:37:12,385 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:37:12,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:37:12,395 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:37:12,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:37:14,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:37:14,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:37:14,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:37:14,057 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:37:14,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1839612187] [2022-01-31 17:37:14,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1839612187] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:37:14,057 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:37:14,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-01-31 17:37:14,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501077686] [2022-01-31 17:37:14,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:37:14,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-01-31 17:37:14,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:37:14,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-01-31 17:37:14,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 17:37:14,059 INFO L87 Difference]: Start difference. First operand 308 states and 312 transitions. Second operand has 75 states, 75 states have (on average 1.1866666666666668) internal successors, (89), 74 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:37:16,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:37:16,576 INFO L93 Difference]: Finished difference Result 542 states and 553 transitions. [2022-01-31 17:37:16,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-31 17:37:16,576 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.1866666666666668) internal successors, (89), 74 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 303 [2022-01-31 17:37:16,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:37:16,577 INFO L225 Difference]: With dead ends: 542 [2022-01-31 17:37:16,577 INFO L226 Difference]: Without dead ends: 312 [2022-01-31 17:37:16,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2627 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=8103, Invalid=13359, Unknown=0, NotChecked=0, Total=21462 [2022-01-31 17:37:16,578 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 1289 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 1613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1289 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:37:16,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 35 Invalid, 1613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1289 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:37:16,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-01-31 17:37:16,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 312. [2022-01-31 17:37:16,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 306 states have (on average 1.0163398692810457) internal successors, (311), 306 states have internal predecessors, (311), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:37:16,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 316 transitions. [2022-01-31 17:37:16,584 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 316 transitions. Word has length 303 [2022-01-31 17:37:16,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:37:16,584 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 316 transitions. [2022-01-31 17:37:16,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.1866666666666668) internal successors, (89), 74 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:37:16,584 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 316 transitions. [2022-01-31 17:37:16,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2022-01-31 17:37:16,585 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:37:16,585 INFO L514 BasicCegarLoop]: trace histogram [72, 72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:37:16,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-01-31 17:37:16,585 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:37:16,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:37:16,585 INFO L85 PathProgramCache]: Analyzing trace with hash -170509797, now seen corresponding path program 72 times [2022-01-31 17:37:16,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:37:16,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [283302636] [2022-01-31 17:37:16,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:37:16,586 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:37:16,586 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:37:16,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:37:16,597 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:37:16,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:37:18,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:37:18,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:37:18,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:37:18,256 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:37:18,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [283302636] [2022-01-31 17:37:18,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [283302636] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:37:18,256 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:37:18,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-01-31 17:37:18,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763748833] [2022-01-31 17:37:18,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:37:18,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-01-31 17:37:18,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:37:18,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-01-31 17:37:18,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 17:37:18,258 INFO L87 Difference]: Start difference. First operand 312 states and 316 transitions. Second operand has 76 states, 76 states have (on average 1.1842105263157894) internal successors, (90), 75 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:37:20,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:37:20,740 INFO L93 Difference]: Finished difference Result 549 states and 560 transitions. [2022-01-31 17:37:20,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-31 17:37:20,741 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.1842105263157894) internal successors, (90), 75 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 307 [2022-01-31 17:37:20,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:37:20,742 INFO L225 Difference]: With dead ends: 549 [2022-01-31 17:37:20,742 INFO L226 Difference]: Without dead ends: 316 [2022-01-31 17:37:20,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2700 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=8325, Invalid=13727, Unknown=0, NotChecked=0, Total=22052 [2022-01-31 17:37:20,744 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 1170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1170 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:37:20,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 40 Invalid, 1513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1170 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:37:20,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-01-31 17:37:20,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 316. [2022-01-31 17:37:20,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 310 states have (on average 1.0161290322580645) internal successors, (315), 310 states have internal predecessors, (315), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:37:20,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 320 transitions. [2022-01-31 17:37:20,764 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 320 transitions. Word has length 307 [2022-01-31 17:37:20,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:37:20,764 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 320 transitions. [2022-01-31 17:37:20,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 1.1842105263157894) internal successors, (90), 75 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:37:20,764 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 320 transitions. [2022-01-31 17:37:20,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2022-01-31 17:37:20,765 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:37:20,765 INFO L514 BasicCegarLoop]: trace histogram [73, 73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:37:20,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-01-31 17:37:20,765 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:37:20,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:37:20,766 INFO L85 PathProgramCache]: Analyzing trace with hash 850745689, now seen corresponding path program 73 times [2022-01-31 17:37:20,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:37:20,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1735113306] [2022-01-31 17:37:20,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:37:20,766 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:37:20,767 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:37:20,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:37:20,778 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:37:20,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:37:22,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:37:22,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:37:22,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:37:22,479 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:37:22,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1735113306] [2022-01-31 17:37:22,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1735113306] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:37:22,479 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:37:22,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-01-31 17:37:22,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787121825] [2022-01-31 17:37:22,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:37:22,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-01-31 17:37:22,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:37:22,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-01-31 17:37:22,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 17:37:22,481 INFO L87 Difference]: Start difference. First operand 316 states and 320 transitions. Second operand has 77 states, 77 states have (on average 1.1818181818181819) internal successors, (91), 76 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:37:25,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:37:25,028 INFO L93 Difference]: Finished difference Result 556 states and 567 transitions. [2022-01-31 17:37:25,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-31 17:37:25,028 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.1818181818181819) internal successors, (91), 76 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 311 [2022-01-31 17:37:25,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:37:25,029 INFO L225 Difference]: With dead ends: 556 [2022-01-31 17:37:25,029 INFO L226 Difference]: Without dead ends: 320 [2022-01-31 17:37:25,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2774 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=8550, Invalid=14100, Unknown=0, NotChecked=0, Total=22650 [2022-01-31 17:37:25,031 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 1008 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 1430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1008 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:37:25,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 65 Invalid, 1430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1008 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:37:25,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-01-31 17:37:25,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 320. [2022-01-31 17:37:25,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 314 states have (on average 1.015923566878981) internal successors, (319), 314 states have internal predecessors, (319), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:37:25,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 324 transitions. [2022-01-31 17:37:25,037 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 324 transitions. Word has length 311 [2022-01-31 17:37:25,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:37:25,037 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 324 transitions. [2022-01-31 17:37:25,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 1.1818181818181819) internal successors, (91), 76 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:37:25,037 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 324 transitions. [2022-01-31 17:37:25,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2022-01-31 17:37:25,038 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:37:25,038 INFO L514 BasicCegarLoop]: trace histogram [74, 74, 74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:37:25,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-01-31 17:37:25,038 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:37:25,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:37:25,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1480212389, now seen corresponding path program 74 times [2022-01-31 17:37:25,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:37:25,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [74767997] [2022-01-31 17:37:25,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:37:25,040 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:37:25,040 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:37:25,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:37:25,052 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:37:25,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:37:26,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:37:26,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:37:26,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:37:26,951 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:37:26,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [74767997] [2022-01-31 17:37:26,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [74767997] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:37:26,951 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:37:26,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-01-31 17:37:26,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774976022] [2022-01-31 17:37:26,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:37:26,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-01-31 17:37:26,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:37:26,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-01-31 17:37:26,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 17:37:26,953 INFO L87 Difference]: Start difference. First operand 320 states and 324 transitions. Second operand has 78 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 77 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:37:29,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:37:29,594 INFO L93 Difference]: Finished difference Result 563 states and 574 transitions. [2022-01-31 17:37:29,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-31 17:37:29,595 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 77 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 315 [2022-01-31 17:37:29,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:37:29,596 INFO L225 Difference]: With dead ends: 563 [2022-01-31 17:37:29,596 INFO L226 Difference]: Without dead ends: 324 [2022-01-31 17:37:29,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2849 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=8778, Invalid=14478, Unknown=0, NotChecked=0, Total=23256 [2022-01-31 17:37:29,597 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 1165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1165 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:37:29,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 45 Invalid, 1531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1165 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:37:29,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-01-31 17:37:29,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 324. [2022-01-31 17:37:29,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 318 states have (on average 1.0157232704402517) internal successors, (323), 318 states have internal predecessors, (323), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:37:29,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 328 transitions. [2022-01-31 17:37:29,604 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 328 transitions. Word has length 315 [2022-01-31 17:37:29,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:37:29,604 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 328 transitions. [2022-01-31 17:37:29,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 77 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:37:29,604 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 328 transitions. [2022-01-31 17:37:29,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2022-01-31 17:37:29,605 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:37:29,605 INFO L514 BasicCegarLoop]: trace histogram [75, 75, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:37:29,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-01-31 17:37:29,605 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:37:29,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:37:29,605 INFO L85 PathProgramCache]: Analyzing trace with hash -696969063, now seen corresponding path program 75 times [2022-01-31 17:37:29,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:37:29,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1263969537] [2022-01-31 17:37:29,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:37:29,606 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:37:29,606 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:37:29,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:37:29,618 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:37:29,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:37:31,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:37:31,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:37:31,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:37:31,472 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:37:31,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1263969537] [2022-01-31 17:37:31,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1263969537] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:37:31,472 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:37:31,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-01-31 17:37:31,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763414870] [2022-01-31 17:37:31,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:37:31,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-01-31 17:37:31,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:37:31,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-01-31 17:37:31,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3005, Invalid=3157, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 17:37:31,474 INFO L87 Difference]: Start difference. First operand 324 states and 328 transitions. Second operand has 79 states, 79 states have (on average 1.1772151898734178) internal successors, (93), 78 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:37:34,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:37:34,349 INFO L93 Difference]: Finished difference Result 570 states and 581 transitions. [2022-01-31 17:37:34,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-31 17:37:34,350 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.1772151898734178) internal successors, (93), 78 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 319 [2022-01-31 17:37:34,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:37:34,351 INFO L225 Difference]: With dead ends: 570 [2022-01-31 17:37:34,351 INFO L226 Difference]: Without dead ends: 328 [2022-01-31 17:37:34,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2925 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=9009, Invalid=14861, Unknown=0, NotChecked=0, Total=23870 [2022-01-31 17:37:34,352 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 1150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1150 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:37:34,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 50 Invalid, 1535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1150 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:37:34,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-01-31 17:37:34,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 328. [2022-01-31 17:37:34,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 322 states have (on average 1.015527950310559) internal successors, (327), 322 states have internal predecessors, (327), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:37:34,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 332 transitions. [2022-01-31 17:37:34,359 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 332 transitions. Word has length 319 [2022-01-31 17:37:34,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:37:34,360 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 332 transitions. [2022-01-31 17:37:34,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 1.1772151898734178) internal successors, (93), 78 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:37:34,360 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 332 transitions. [2022-01-31 17:37:34,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2022-01-31 17:37:34,361 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:37:34,361 INFO L514 BasicCegarLoop]: trace histogram [76, 76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:37:34,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-01-31 17:37:34,361 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:37:34,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:37:34,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1008617829, now seen corresponding path program 76 times [2022-01-31 17:37:34,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:37:34,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1027587128] [2022-01-31 17:37:34,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:37:34,362 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:37:34,362 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:37:34,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:37:34,375 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:37:34,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:37:36,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:37:36,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:37:36,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:37:36,321 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:37:36,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1027587128] [2022-01-31 17:37:36,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1027587128] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:37:36,321 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:37:36,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-01-31 17:37:36,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664918967] [2022-01-31 17:37:36,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:37:36,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-01-31 17:37:36,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:37:36,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-01-31 17:37:36,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 17:37:36,323 INFO L87 Difference]: Start difference. First operand 328 states and 332 transitions. Second operand has 80 states, 80 states have (on average 1.175) internal successors, (94), 79 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:37:39,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:37:39,197 INFO L93 Difference]: Finished difference Result 577 states and 588 transitions. [2022-01-31 17:37:39,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-01-31 17:37:39,198 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.175) internal successors, (94), 79 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 323 [2022-01-31 17:37:39,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:37:39,199 INFO L225 Difference]: With dead ends: 577 [2022-01-31 17:37:39,199 INFO L226 Difference]: Without dead ends: 332 [2022-01-31 17:37:39,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3002 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=9243, Invalid=15249, Unknown=0, NotChecked=0, Total=24492 [2022-01-31 17:37:39,201 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 1316 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1316 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:37:39,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 40 Invalid, 1675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1316 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:37:39,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-01-31 17:37:39,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 332. [2022-01-31 17:37:39,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 326 states have (on average 1.0153374233128833) internal successors, (331), 326 states have internal predecessors, (331), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:37:39,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 336 transitions. [2022-01-31 17:37:39,207 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 336 transitions. Word has length 323 [2022-01-31 17:37:39,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:37:39,207 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 336 transitions. [2022-01-31 17:37:39,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.175) internal successors, (94), 79 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:37:39,207 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 336 transitions. [2022-01-31 17:37:39,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2022-01-31 17:37:39,208 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:37:39,209 INFO L514 BasicCegarLoop]: trace histogram [77, 77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:37:39,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-01-31 17:37:39,209 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:37:39,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:37:39,209 INFO L85 PathProgramCache]: Analyzing trace with hash 129148889, now seen corresponding path program 77 times [2022-01-31 17:37:39,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:37:39,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [329829546] [2022-01-31 17:37:39,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:37:39,210 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:37:39,210 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:37:39,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:37:39,223 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:37:39,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:37:41,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:37:41,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:37:41,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:37:41,174 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:37:41,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [329829546] [2022-01-31 17:37:41,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [329829546] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:37:41,174 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:37:41,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-01-31 17:37:41,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965389183] [2022-01-31 17:37:41,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:37:41,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-01-31 17:37:41,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:37:41,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-01-31 17:37:41,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3162, Invalid=3318, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 17:37:41,176 INFO L87 Difference]: Start difference. First operand 332 states and 336 transitions. Second operand has 81 states, 81 states have (on average 1.1728395061728396) internal successors, (95), 80 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:37:44,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:37:44,116 INFO L93 Difference]: Finished difference Result 584 states and 595 transitions. [2022-01-31 17:37:44,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-01-31 17:37:44,116 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.1728395061728396) internal successors, (95), 80 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 327 [2022-01-31 17:37:44,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:37:44,117 INFO L225 Difference]: With dead ends: 584 [2022-01-31 17:37:44,117 INFO L226 Difference]: Without dead ends: 336 [2022-01-31 17:37:44,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3080 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=9480, Invalid=15642, Unknown=0, NotChecked=0, Total=25122 [2022-01-31 17:37:44,119 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 1411 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1411 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:37:44,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 40 Invalid, 1774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1411 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:37:44,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2022-01-31 17:37:44,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 336. [2022-01-31 17:37:44,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 330 states have (on average 1.0151515151515151) internal successors, (335), 330 states have internal predecessors, (335), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:37:44,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 340 transitions. [2022-01-31 17:37:44,126 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 340 transitions. Word has length 327 [2022-01-31 17:37:44,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:37:44,126 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 340 transitions. [2022-01-31 17:37:44,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.1728395061728396) internal successors, (95), 80 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:37:44,126 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 340 transitions. [2022-01-31 17:37:44,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2022-01-31 17:37:44,127 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:37:44,127 INFO L514 BasicCegarLoop]: trace histogram [78, 78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:37:44,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-01-31 17:37:44,127 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:37:44,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:37:44,127 INFO L85 PathProgramCache]: Analyzing trace with hash -664658725, now seen corresponding path program 78 times [2022-01-31 17:37:44,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:37:44,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [193932857] [2022-01-31 17:37:44,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:37:44,128 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:37:44,128 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:37:44,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:37:44,141 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:37:44,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:37:46,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:37:46,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:37:46,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:37:46,065 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:37:46,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [193932857] [2022-01-31 17:37:46,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [193932857] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:37:46,065 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:37:46,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-01-31 17:37:46,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142616590] [2022-01-31 17:37:46,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:37:46,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-01-31 17:37:46,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:37:46,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-01-31 17:37:46,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2022-01-31 17:37:46,067 INFO L87 Difference]: Start difference. First operand 336 states and 340 transitions. Second operand has 82 states, 82 states have (on average 1.170731707317073) internal successors, (96), 81 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:37:49,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:37:49,021 INFO L93 Difference]: Finished difference Result 591 states and 602 transitions. [2022-01-31 17:37:49,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-31 17:37:49,022 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 1.170731707317073) internal successors, (96), 81 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 331 [2022-01-31 17:37:49,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:37:49,023 INFO L225 Difference]: With dead ends: 591 [2022-01-31 17:37:49,023 INFO L226 Difference]: Without dead ends: 340 [2022-01-31 17:37:49,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3159 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=9720, Invalid=16040, Unknown=0, NotChecked=0, Total=25760 [2022-01-31 17:37:49,024 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 1348 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1348 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:37:49,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 55 Invalid, 1760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1348 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:37:49,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2022-01-31 17:37:49,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 340. [2022-01-31 17:37:49,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 334 states have (on average 1.0149700598802396) internal successors, (339), 334 states have internal predecessors, (339), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:37:49,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 344 transitions. [2022-01-31 17:37:49,033 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 344 transitions. Word has length 331 [2022-01-31 17:37:49,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:37:49,033 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 344 transitions. [2022-01-31 17:37:49,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 1.170731707317073) internal successors, (96), 81 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:37:49,033 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 344 transitions. [2022-01-31 17:37:49,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2022-01-31 17:37:49,034 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:37:49,034 INFO L514 BasicCegarLoop]: trace histogram [79, 79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:37:49,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-01-31 17:37:49,034 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:37:49,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:37:49,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1449785575, now seen corresponding path program 79 times [2022-01-31 17:37:49,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:37:49,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [190454984] [2022-01-31 17:37:49,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:37:49,035 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:37:49,036 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:37:49,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:37:49,059 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:37:49,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:37:51,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:37:51,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:37:51,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:37:51,022 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:37:51,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [190454984] [2022-01-31 17:37:51,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [190454984] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:37:51,022 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:37:51,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-01-31 17:37:51,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322012188] [2022-01-31 17:37:51,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:37:51,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-01-31 17:37:51,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:37:51,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-01-31 17:37:51,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3323, Invalid=3483, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 17:37:51,025 INFO L87 Difference]: Start difference. First operand 340 states and 344 transitions. Second operand has 83 states, 83 states have (on average 1.1686746987951808) internal successors, (97), 82 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:37:54,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:37:54,073 INFO L93 Difference]: Finished difference Result 598 states and 609 transitions. [2022-01-31 17:37:54,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-01-31 17:37:54,073 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.1686746987951808) internal successors, (97), 82 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 335 [2022-01-31 17:37:54,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:37:54,074 INFO L225 Difference]: With dead ends: 598 [2022-01-31 17:37:54,074 INFO L226 Difference]: Without dead ends: 344 [2022-01-31 17:37:54,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3239 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=9963, Invalid=16443, Unknown=0, NotChecked=0, Total=26406 [2022-01-31 17:37:54,075 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 1089 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 1520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1089 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:37:54,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 60 Invalid, 1520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1089 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:37:54,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-01-31 17:37:54,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 344. [2022-01-31 17:37:54,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 338 states have (on average 1.014792899408284) internal successors, (343), 338 states have internal predecessors, (343), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:37:54,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 348 transitions. [2022-01-31 17:37:54,082 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 348 transitions. Word has length 335 [2022-01-31 17:37:54,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:37:54,082 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 348 transitions. [2022-01-31 17:37:54,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 1.1686746987951808) internal successors, (97), 82 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:37:54,082 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 348 transitions. [2022-01-31 17:37:54,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2022-01-31 17:37:54,083 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:37:54,083 INFO L514 BasicCegarLoop]: trace histogram [80, 80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:37:54,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-01-31 17:37:54,084 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:37:54,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:37:54,084 INFO L85 PathProgramCache]: Analyzing trace with hash 343864091, now seen corresponding path program 80 times [2022-01-31 17:37:54,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:37:54,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [782078054] [2022-01-31 17:37:54,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:37:54,085 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:37:54,085 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:37:54,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:37:54,099 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:37:54,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:37:56,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:37:56,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:37:56,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:37:56,181 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:37:56,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [782078054] [2022-01-31 17:37:56,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [782078054] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:37:56,181 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:37:56,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-01-31 17:37:56,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47857858] [2022-01-31 17:37:56,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:37:56,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-01-31 17:37:56,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:37:56,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-01-31 17:37:56,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 17:37:56,184 INFO L87 Difference]: Start difference. First operand 344 states and 348 transitions. Second operand has 84 states, 84 states have (on average 1.1666666666666667) internal successors, (98), 83 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:37:59,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:37:59,323 INFO L93 Difference]: Finished difference Result 605 states and 616 transitions. [2022-01-31 17:37:59,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-31 17:37:59,323 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.1666666666666667) internal successors, (98), 83 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 339 [2022-01-31 17:37:59,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:37:59,324 INFO L225 Difference]: With dead ends: 605 [2022-01-31 17:37:59,324 INFO L226 Difference]: Without dead ends: 348 [2022-01-31 17:37:59,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3320 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=10209, Invalid=16851, Unknown=0, NotChecked=0, Total=27060 [2022-01-31 17:37:59,325 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 1218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1218 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:37:59,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 55 Invalid, 1638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1218 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:37:59,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-01-31 17:37:59,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 348. [2022-01-31 17:37:59,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 342 states have (on average 1.0146198830409356) internal successors, (347), 342 states have internal predecessors, (347), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:37:59,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 352 transitions. [2022-01-31 17:37:59,332 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 352 transitions. Word has length 339 [2022-01-31 17:37:59,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:37:59,332 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 352 transitions. [2022-01-31 17:37:59,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.1666666666666667) internal successors, (98), 83 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:37:59,332 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 352 transitions. [2022-01-31 17:37:59,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2022-01-31 17:37:59,333 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:37:59,333 INFO L514 BasicCegarLoop]: trace histogram [81, 81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:37:59,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-01-31 17:37:59,333 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:37:59,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:37:59,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1313289817, now seen corresponding path program 81 times [2022-01-31 17:37:59,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:37:59,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1509499251] [2022-01-31 17:37:59,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:37:59,335 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:37:59,335 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:37:59,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:37:59,349 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:37:59,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:01,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:38:01,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:01,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:38:01,477 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:38:01,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1509499251] [2022-01-31 17:38:01,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1509499251] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:38:01,477 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:38:01,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-01-31 17:38:01,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10469940] [2022-01-31 17:38:01,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:38:01,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-01-31 17:38:01,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:38:01,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-01-31 17:38:01,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3488, Invalid=3652, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 17:38:01,479 INFO L87 Difference]: Start difference. First operand 348 states and 352 transitions. Second operand has 85 states, 85 states have (on average 1.1647058823529413) internal successors, (99), 84 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:38:04,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:38:04,625 INFO L93 Difference]: Finished difference Result 612 states and 623 transitions. [2022-01-31 17:38:04,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-01-31 17:38:04,626 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.1647058823529413) internal successors, (99), 84 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 343 [2022-01-31 17:38:04,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:38:04,627 INFO L225 Difference]: With dead ends: 612 [2022-01-31 17:38:04,627 INFO L226 Difference]: Without dead ends: 352 [2022-01-31 17:38:04,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3402 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=10458, Invalid=17264, Unknown=0, NotChecked=0, Total=27722 [2022-01-31 17:38:04,628 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 1307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1307 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:38:04,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 55 Invalid, 1731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1307 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:38:04,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2022-01-31 17:38:04,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 352. [2022-01-31 17:38:04,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 346 states have (on average 1.0144508670520231) internal successors, (351), 346 states have internal predecessors, (351), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:38:04,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 356 transitions. [2022-01-31 17:38:04,635 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 356 transitions. Word has length 343 [2022-01-31 17:38:04,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:38:04,635 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 356 transitions. [2022-01-31 17:38:04,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.1647058823529413) internal successors, (99), 84 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:38:04,635 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 356 transitions. [2022-01-31 17:38:04,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2022-01-31 17:38:04,636 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:38:04,636 INFO L514 BasicCegarLoop]: trace histogram [82, 82, 82, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:38:04,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-01-31 17:38:04,636 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:38:04,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:38:04,636 INFO L85 PathProgramCache]: Analyzing trace with hash -932169381, now seen corresponding path program 82 times [2022-01-31 17:38:04,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:38:04,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1047552605] [2022-01-31 17:38:04,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:38:04,637 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:38:04,637 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:38:04,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:38:04,651 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:38:04,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:06,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:38:06,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:06,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:38:06,811 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:38:06,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1047552605] [2022-01-31 17:38:06,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1047552605] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:38:06,812 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:38:06,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-01-31 17:38:06,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883984743] [2022-01-31 17:38:06,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:38:06,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-01-31 17:38:06,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:38:06,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-01-31 17:38:06,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2022-01-31 17:38:06,814 INFO L87 Difference]: Start difference. First operand 352 states and 356 transitions. Second operand has 86 states, 86 states have (on average 1.1627906976744187) internal successors, (100), 85 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:38:10,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:38:10,189 INFO L93 Difference]: Finished difference Result 619 states and 630 transitions. [2022-01-31 17:38:10,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-31 17:38:10,190 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 1.1627906976744187) internal successors, (100), 85 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 347 [2022-01-31 17:38:10,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:38:10,190 INFO L225 Difference]: With dead ends: 619 [2022-01-31 17:38:10,191 INFO L226 Difference]: Without dead ends: 356 [2022-01-31 17:38:10,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3485 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=10710, Invalid=17682, Unknown=0, NotChecked=0, Total=28392 [2022-01-31 17:38:10,192 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 1422 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1422 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:38:10,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 55 Invalid, 1850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1422 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:38:10,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2022-01-31 17:38:10,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 356. [2022-01-31 17:38:10,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 350 states have (on average 1.0142857142857142) internal successors, (355), 350 states have internal predecessors, (355), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:38:10,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 360 transitions. [2022-01-31 17:38:10,198 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 360 transitions. Word has length 347 [2022-01-31 17:38:10,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:38:10,198 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 360 transitions. [2022-01-31 17:38:10,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 1.1627906976744187) internal successors, (100), 85 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:38:10,199 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 360 transitions. [2022-01-31 17:38:10,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2022-01-31 17:38:10,200 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:38:10,200 INFO L514 BasicCegarLoop]: trace histogram [83, 83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:38:10,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-01-31 17:38:10,200 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:38:10,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:38:10,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1225902695, now seen corresponding path program 83 times [2022-01-31 17:38:10,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:38:10,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1478435791] [2022-01-31 17:38:10,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:38:10,201 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:38:10,201 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:38:10,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:38:10,216 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:38:10,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:12,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:38:12,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:12,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:38:12,457 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:38:12,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1478435791] [2022-01-31 17:38:12,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1478435791] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:38:12,457 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:38:12,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-01-31 17:38:12,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346400725] [2022-01-31 17:38:12,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:38:12,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-01-31 17:38:12,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:38:12,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-01-31 17:38:12,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3657, Invalid=3825, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 17:38:12,459 INFO L87 Difference]: Start difference. First operand 356 states and 360 transitions. Second operand has 87 states, 87 states have (on average 1.160919540229885) internal successors, (101), 86 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:38:15,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:38:15,758 INFO L93 Difference]: Finished difference Result 626 states and 637 transitions. [2022-01-31 17:38:15,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-01-31 17:38:15,758 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.160919540229885) internal successors, (101), 86 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 351 [2022-01-31 17:38:15,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:38:15,759 INFO L225 Difference]: With dead ends: 626 [2022-01-31 17:38:15,759 INFO L226 Difference]: Without dead ends: 360 [2022-01-31 17:38:15,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3569 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=10965, Invalid=18105, Unknown=0, NotChecked=0, Total=29070 [2022-01-31 17:38:15,760 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 1316 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1316 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:38:15,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 50 Invalid, 1733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1316 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:38:15,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2022-01-31 17:38:15,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 360. [2022-01-31 17:38:15,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 354 states have (on average 1.0141242937853108) internal successors, (359), 354 states have internal predecessors, (359), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:38:15,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 364 transitions. [2022-01-31 17:38:15,767 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 364 transitions. Word has length 351 [2022-01-31 17:38:15,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:38:15,767 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 364 transitions. [2022-01-31 17:38:15,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 1.160919540229885) internal successors, (101), 86 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:38:15,767 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 364 transitions. [2022-01-31 17:38:15,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2022-01-31 17:38:15,768 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:38:15,769 INFO L514 BasicCegarLoop]: trace histogram [84, 84, 84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:38:15,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-01-31 17:38:15,769 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:38:15,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:38:15,769 INFO L85 PathProgramCache]: Analyzing trace with hash -445780069, now seen corresponding path program 84 times [2022-01-31 17:38:15,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:38:15,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [545310455] [2022-01-31 17:38:15,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:38:15,770 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:38:15,770 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:38:15,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:38:15,785 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:38:15,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:17,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:38:17,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:17,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:38:17,995 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:38:17,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [545310455] [2022-01-31 17:38:17,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [545310455] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:38:17,995 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:38:17,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-01-31 17:38:17,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798657526] [2022-01-31 17:38:17,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:38:17,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-01-31 17:38:17,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:38:17,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-01-31 17:38:17,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2022-01-31 17:38:17,997 INFO L87 Difference]: Start difference. First operand 360 states and 364 transitions. Second operand has 88 states, 88 states have (on average 1.1590909090909092) internal successors, (102), 87 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:38:21,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:38:21,471 INFO L93 Difference]: Finished difference Result 633 states and 644 transitions. [2022-01-31 17:38:21,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-01-31 17:38:21,472 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 1.1590909090909092) internal successors, (102), 87 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 355 [2022-01-31 17:38:21,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:38:21,473 INFO L225 Difference]: With dead ends: 633 [2022-01-31 17:38:21,473 INFO L226 Difference]: Without dead ends: 364 [2022-01-31 17:38:21,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3654 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=11223, Invalid=18533, Unknown=0, NotChecked=0, Total=29756 [2022-01-31 17:38:21,474 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 1311 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 1762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1311 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:38:21,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 60 Invalid, 1762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1311 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:38:21,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2022-01-31 17:38:21,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 364. [2022-01-31 17:38:21,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 358 states have (on average 1.0139664804469273) internal successors, (363), 358 states have internal predecessors, (363), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:38:21,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 368 transitions. [2022-01-31 17:38:21,482 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 368 transitions. Word has length 355 [2022-01-31 17:38:21,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:38:21,482 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 368 transitions. [2022-01-31 17:38:21,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 1.1590909090909092) internal successors, (102), 87 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:38:21,482 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 368 transitions. [2022-01-31 17:38:21,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-01-31 17:38:21,483 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:38:21,483 INFO L514 BasicCegarLoop]: trace histogram [85, 85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:38:21,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-01-31 17:38:21,484 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:38:21,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:38:21,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1404241113, now seen corresponding path program 85 times [2022-01-31 17:38:21,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:38:21,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [513233441] [2022-01-31 17:38:21,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:38:21,485 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:38:21,485 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:38:21,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:38:21,499 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:38:21,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:23,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:38:23,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:23,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:38:23,788 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:38:23,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [513233441] [2022-01-31 17:38:23,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [513233441] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:38:23,788 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:38:23,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-01-31 17:38:23,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930546421] [2022-01-31 17:38:23,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:38:23,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-01-31 17:38:23,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:38:23,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-01-31 17:38:23,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3830, Invalid=4002, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 17:38:23,790 INFO L87 Difference]: Start difference. First operand 364 states and 368 transitions. Second operand has 89 states, 89 states have (on average 1.1573033707865168) internal successors, (103), 88 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:38:27,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:38:27,311 INFO L93 Difference]: Finished difference Result 640 states and 651 transitions. [2022-01-31 17:38:27,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-31 17:38:27,312 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 1.1573033707865168) internal successors, (103), 88 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 359 [2022-01-31 17:38:27,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:38:27,313 INFO L225 Difference]: With dead ends: 640 [2022-01-31 17:38:27,313 INFO L226 Difference]: Without dead ends: 368 [2022-01-31 17:38:27,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3740 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=11484, Invalid=18966, Unknown=0, NotChecked=0, Total=30450 [2022-01-31 17:38:27,314 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 1457 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1457 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:38:27,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 40 Invalid, 1852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1457 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:38:27,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2022-01-31 17:38:27,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 368. [2022-01-31 17:38:27,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 362 states have (on average 1.0138121546961325) internal successors, (367), 362 states have internal predecessors, (367), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:38:27,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 372 transitions. [2022-01-31 17:38:27,321 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 372 transitions. Word has length 359 [2022-01-31 17:38:27,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:38:27,321 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 372 transitions. [2022-01-31 17:38:27,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 1.1573033707865168) internal successors, (103), 88 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:38:27,322 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 372 transitions. [2022-01-31 17:38:27,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2022-01-31 17:38:27,323 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:38:27,323 INFO L514 BasicCegarLoop]: trace histogram [86, 86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:38:27,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-01-31 17:38:27,323 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:38:27,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:38:27,323 INFO L85 PathProgramCache]: Analyzing trace with hash 2108691931, now seen corresponding path program 86 times [2022-01-31 17:38:27,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:38:27,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1448364862] [2022-01-31 17:38:27,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:38:27,325 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:38:27,325 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:38:27,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:38:27,340 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:38:27,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:29,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:38:29,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:29,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:38:29,690 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:38:29,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1448364862] [2022-01-31 17:38:29,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1448364862] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:38:29,690 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:38:29,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-01-31 17:38:29,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003041986] [2022-01-31 17:38:29,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:38:29,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-01-31 17:38:29,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:38:29,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-01-31 17:38:29,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3918, Invalid=4092, Unknown=0, NotChecked=0, Total=8010 [2022-01-31 17:38:29,692 INFO L87 Difference]: Start difference. First operand 368 states and 372 transitions. Second operand has 90 states, 90 states have (on average 1.1555555555555554) internal successors, (104), 89 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:38:33,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:38:33,402 INFO L93 Difference]: Finished difference Result 647 states and 658 transitions. [2022-01-31 17:38:33,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-01-31 17:38:33,402 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 1.1555555555555554) internal successors, (104), 89 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 363 [2022-01-31 17:38:33,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:38:33,403 INFO L225 Difference]: With dead ends: 647 [2022-01-31 17:38:33,403 INFO L226 Difference]: Without dead ends: 372 [2022-01-31 17:38:33,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3827 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=11748, Invalid=19404, Unknown=0, NotChecked=0, Total=31152 [2022-01-31 17:38:33,405 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 1567 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1567 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:38:33,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 45 Invalid, 1981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1567 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:38:33,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2022-01-31 17:38:33,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 372. [2022-01-31 17:38:33,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 366 states have (on average 1.0136612021857923) internal successors, (371), 366 states have internal predecessors, (371), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:38:33,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 376 transitions. [2022-01-31 17:38:33,412 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 376 transitions. Word has length 363 [2022-01-31 17:38:33,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:38:33,412 INFO L470 AbstractCegarLoop]: Abstraction has 372 states and 376 transitions. [2022-01-31 17:38:33,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 1.1555555555555554) internal successors, (104), 89 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:38:33,413 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 376 transitions. [2022-01-31 17:38:33,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2022-01-31 17:38:33,414 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:38:33,414 INFO L514 BasicCegarLoop]: trace histogram [87, 87, 87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:38:33,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-01-31 17:38:33,414 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:38:33,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:38:33,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1010981863, now seen corresponding path program 87 times [2022-01-31 17:38:33,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:38:33,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1931763492] [2022-01-31 17:38:33,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:38:33,415 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:38:33,416 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:38:33,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:38:33,438 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:38:33,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:35,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:38:35,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:35,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:38:35,832 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:38:35,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1931763492] [2022-01-31 17:38:35,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1931763492] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:38:35,833 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:38:35,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-01-31 17:38:35,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037512057] [2022-01-31 17:38:35,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:38:35,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-01-31 17:38:35,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:38:35,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-01-31 17:38:35,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4007, Invalid=4183, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 17:38:35,835 INFO L87 Difference]: Start difference. First operand 372 states and 376 transitions. Second operand has 91 states, 91 states have (on average 1.1538461538461537) internal successors, (105), 90 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:38:39,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:38:39,497 INFO L93 Difference]: Finished difference Result 654 states and 665 transitions. [2022-01-31 17:38:39,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-01-31 17:38:39,497 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 1.1538461538461537) internal successors, (105), 90 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 367 [2022-01-31 17:38:39,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:38:39,498 INFO L225 Difference]: With dead ends: 654 [2022-01-31 17:38:39,498 INFO L226 Difference]: Without dead ends: 376 [2022-01-31 17:38:39,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3915 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=12015, Invalid=19847, Unknown=0, NotChecked=0, Total=31862 [2022-01-31 17:38:39,500 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 1309 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 1772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1309 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:38:39,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 60 Invalid, 1772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1309 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:38:39,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2022-01-31 17:38:39,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 376. [2022-01-31 17:38:39,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 370 states have (on average 1.0135135135135136) internal successors, (375), 370 states have internal predecessors, (375), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:38:39,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 380 transitions. [2022-01-31 17:38:39,506 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 380 transitions. Word has length 367 [2022-01-31 17:38:39,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:38:39,506 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 380 transitions. [2022-01-31 17:38:39,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 1.1538461538461537) internal successors, (105), 90 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:38:39,507 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 380 transitions. [2022-01-31 17:38:39,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2022-01-31 17:38:39,508 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:38:39,508 INFO L514 BasicCegarLoop]: trace histogram [88, 88, 88, 88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:38:39,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-01-31 17:38:39,508 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:38:39,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:38:39,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1148103707, now seen corresponding path program 88 times [2022-01-31 17:38:39,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:38:39,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2014397295] [2022-01-31 17:38:39,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:38:39,509 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:38:39,509 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:38:39,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:38:39,524 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:38:39,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:41,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:38:41,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:41,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:38:41,997 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:38:41,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2014397295] [2022-01-31 17:38:41,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2014397295] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:38:41,997 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:38:41,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-01-31 17:38:41,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934606075] [2022-01-31 17:38:41,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:38:41,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-01-31 17:38:41,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:38:41,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-01-31 17:38:41,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2022-01-31 17:38:41,999 INFO L87 Difference]: Start difference. First operand 376 states and 380 transitions. Second operand has 92 states, 92 states have (on average 1.1521739130434783) internal successors, (106), 91 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:38:45,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:38:45,719 INFO L93 Difference]: Finished difference Result 661 states and 672 transitions. [2022-01-31 17:38:45,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-01-31 17:38:45,719 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 1.1521739130434783) internal successors, (106), 91 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 371 [2022-01-31 17:38:45,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:38:45,720 INFO L225 Difference]: With dead ends: 661 [2022-01-31 17:38:45,721 INFO L226 Difference]: Without dead ends: 380 [2022-01-31 17:38:45,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4004 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=12285, Invalid=20295, Unknown=0, NotChecked=0, Total=32580 [2022-01-31 17:38:45,722 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 1356 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 1823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1356 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:38:45,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 60 Invalid, 1823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1356 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:38:45,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2022-01-31 17:38:45,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 380. [2022-01-31 17:38:45,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 374 states have (on average 1.0133689839572193) internal successors, (379), 374 states have internal predecessors, (379), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:38:45,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 384 transitions. [2022-01-31 17:38:45,729 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 384 transitions. Word has length 371 [2022-01-31 17:38:45,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:38:45,729 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 384 transitions. [2022-01-31 17:38:45,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 1.1521739130434783) internal successors, (106), 91 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:38:45,729 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 384 transitions. [2022-01-31 17:38:45,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2022-01-31 17:38:45,730 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:38:45,730 INFO L514 BasicCegarLoop]: trace histogram [89, 89, 89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:38:45,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-01-31 17:38:45,730 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:38:45,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:38:45,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1429607257, now seen corresponding path program 89 times [2022-01-31 17:38:45,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:38:45,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [661587007] [2022-01-31 17:38:45,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:38:45,731 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:38:45,732 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:38:45,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:38:45,747 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:38:45,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:48,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:38:48,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:48,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:38:48,260 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:38:48,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [661587007] [2022-01-31 17:38:48,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [661587007] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:38:48,260 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:38:48,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-01-31 17:38:48,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330213349] [2022-01-31 17:38:48,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:38:48,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-01-31 17:38:48,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:38:48,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-01-31 17:38:48,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4188, Invalid=4368, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 17:38:48,262 INFO L87 Difference]: Start difference. First operand 380 states and 384 transitions. Second operand has 93 states, 93 states have (on average 1.1505376344086022) internal successors, (107), 92 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:38:52,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:38:52,072 INFO L93 Difference]: Finished difference Result 668 states and 679 transitions. [2022-01-31 17:38:52,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-01-31 17:38:52,072 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 1.1505376344086022) internal successors, (107), 92 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 375 [2022-01-31 17:38:52,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:38:52,073 INFO L225 Difference]: With dead ends: 668 [2022-01-31 17:38:52,073 INFO L226 Difference]: Without dead ends: 384 [2022-01-31 17:38:52,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4094 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=12558, Invalid=20748, Unknown=0, NotChecked=0, Total=33306 [2022-01-31 17:38:52,075 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 1616 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 2027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1616 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:38:52,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 40 Invalid, 2027 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1616 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:38:52,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2022-01-31 17:38:52,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 384. [2022-01-31 17:38:52,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 378 states have (on average 1.0132275132275133) internal successors, (383), 378 states have internal predecessors, (383), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:38:52,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 388 transitions. [2022-01-31 17:38:52,082 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 388 transitions. Word has length 375 [2022-01-31 17:38:52,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:38:52,082 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 388 transitions. [2022-01-31 17:38:52,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 1.1505376344086022) internal successors, (107), 92 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:38:52,083 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 388 transitions. [2022-01-31 17:38:52,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2022-01-31 17:38:52,084 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:38:52,084 INFO L514 BasicCegarLoop]: trace histogram [90, 90, 90, 90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:38:52,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2022-01-31 17:38:52,084 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:38:52,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:38:52,085 INFO L85 PathProgramCache]: Analyzing trace with hash 232895067, now seen corresponding path program 90 times [2022-01-31 17:38:52,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:38:52,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1927499990] [2022-01-31 17:38:52,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:38:52,086 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:38:52,086 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:38:52,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:38:52,102 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:38:52,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:54,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:38:54,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:54,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:38:54,670 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:38:54,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1927499990] [2022-01-31 17:38:54,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1927499990] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:38:54,670 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:38:54,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-01-31 17:38:54,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724809082] [2022-01-31 17:38:54,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:38:54,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-01-31 17:38:54,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:38:54,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-01-31 17:38:54,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4280, Invalid=4462, Unknown=0, NotChecked=0, Total=8742 [2022-01-31 17:38:54,672 INFO L87 Difference]: Start difference. First operand 384 states and 388 transitions. Second operand has 94 states, 94 states have (on average 1.148936170212766) internal successors, (108), 93 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:38:58,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:38:58,579 INFO L93 Difference]: Finished difference Result 675 states and 686 transitions. [2022-01-31 17:38:58,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-01-31 17:38:58,579 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 1.148936170212766) internal successors, (108), 93 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 379 [2022-01-31 17:38:58,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:38:58,580 INFO L225 Difference]: With dead ends: 675 [2022-01-31 17:38:58,580 INFO L226 Difference]: Without dead ends: 388 [2022-01-31 17:38:58,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4185 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=12834, Invalid=21206, Unknown=0, NotChecked=0, Total=34040 [2022-01-31 17:38:58,582 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 1451 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1451 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:38:58,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 55 Invalid, 1911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1451 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:38:58,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2022-01-31 17:38:58,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 388. [2022-01-31 17:38:58,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 382 states have (on average 1.013089005235602) internal successors, (387), 382 states have internal predecessors, (387), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:38:58,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 392 transitions. [2022-01-31 17:38:58,589 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 392 transitions. Word has length 379 [2022-01-31 17:38:58,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:38:58,589 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 392 transitions. [2022-01-31 17:38:58,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 1.148936170212766) internal successors, (108), 93 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:38:58,589 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 392 transitions. [2022-01-31 17:38:58,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2022-01-31 17:38:58,590 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:38:58,591 INFO L514 BasicCegarLoop]: trace histogram [91, 91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:38:58,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2022-01-31 17:38:58,591 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:38:58,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:38:58,591 INFO L85 PathProgramCache]: Analyzing trace with hash -2059119975, now seen corresponding path program 91 times [2022-01-31 17:38:58,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:38:58,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [141671350] [2022-01-31 17:38:58,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:38:58,592 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:38:58,592 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:38:58,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:38:58,608 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:38:58,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:39:01,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:39:01,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:39:01,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:39:01,208 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:39:01,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [141671350] [2022-01-31 17:39:01,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [141671350] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:39:01,209 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:39:01,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-01-31 17:39:01,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081695042] [2022-01-31 17:39:01,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:39:01,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-01-31 17:39:01,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:39:01,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-01-31 17:39:01,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4373, Invalid=4557, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 17:39:01,213 INFO L87 Difference]: Start difference. First operand 388 states and 392 transitions. Second operand has 95 states, 95 states have (on average 1.1473684210526316) internal successors, (109), 94 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:39:05,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:39:05,180 INFO L93 Difference]: Finished difference Result 682 states and 693 transitions. [2022-01-31 17:39:05,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-01-31 17:39:05,180 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 1.1473684210526316) internal successors, (109), 94 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 383 [2022-01-31 17:39:05,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:39:05,181 INFO L225 Difference]: With dead ends: 682 [2022-01-31 17:39:05,181 INFO L226 Difference]: Without dead ends: 392 [2022-01-31 17:39:05,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4277 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=13113, Invalid=21669, Unknown=0, NotChecked=0, Total=34782 [2022-01-31 17:39:05,182 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 1634 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 2083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1634 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:39:05,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 50 Invalid, 2083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1634 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:39:05,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2022-01-31 17:39:05,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 392. [2022-01-31 17:39:05,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 386 states have (on average 1.0129533678756477) internal successors, (391), 386 states have internal predecessors, (391), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:39:05,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 396 transitions. [2022-01-31 17:39:05,189 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 396 transitions. Word has length 383 [2022-01-31 17:39:05,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:39:05,190 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 396 transitions. [2022-01-31 17:39:05,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 1.1473684210526316) internal successors, (109), 94 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:39:05,190 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 396 transitions. [2022-01-31 17:39:05,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2022-01-31 17:39:05,191 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:39:05,191 INFO L514 BasicCegarLoop]: trace histogram [92, 92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:39:05,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2022-01-31 17:39:05,191 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:39:05,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:39:05,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1329670299, now seen corresponding path program 92 times [2022-01-31 17:39:05,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:39:05,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1636878236] [2022-01-31 17:39:05,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:39:05,192 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:39:05,192 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:39:05,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:39:05,208 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:39:05,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:39:07,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:39:07,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:39:07,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:39:07,800 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:39:07,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1636878236] [2022-01-31 17:39:07,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1636878236] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:39:07,800 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:39:07,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-01-31 17:39:07,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034332324] [2022-01-31 17:39:07,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:39:07,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-01-31 17:39:07,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:39:07,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-01-31 17:39:07,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2022-01-31 17:39:07,804 INFO L87 Difference]: Start difference. First operand 392 states and 396 transitions. Second operand has 96 states, 96 states have (on average 1.1458333333333333) internal successors, (110), 95 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:39:11,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:39:11,739 INFO L93 Difference]: Finished difference Result 689 states and 700 transitions. [2022-01-31 17:39:11,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-01-31 17:39:11,739 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.1458333333333333) internal successors, (110), 95 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 387 [2022-01-31 17:39:11,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:39:11,740 INFO L225 Difference]: With dead ends: 689 [2022-01-31 17:39:11,740 INFO L226 Difference]: Without dead ends: 396 [2022-01-31 17:39:11,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4370 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=13395, Invalid=22137, Unknown=0, NotChecked=0, Total=35532 [2022-01-31 17:39:11,742 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 1353 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 1836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1353 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:39:11,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 60 Invalid, 1836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1353 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:39:11,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2022-01-31 17:39:11,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 396. [2022-01-31 17:39:11,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 390 states have (on average 1.0128205128205128) internal successors, (395), 390 states have internal predecessors, (395), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:39:11,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 400 transitions. [2022-01-31 17:39:11,749 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 400 transitions. Word has length 387 [2022-01-31 17:39:11,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:39:11,749 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 400 transitions. [2022-01-31 17:39:11,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.1458333333333333) internal successors, (110), 95 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:39:11,749 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 400 transitions. [2022-01-31 17:39:11,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2022-01-31 17:39:11,751 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:39:11,751 INFO L514 BasicCegarLoop]: trace histogram [93, 93, 93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:39:11,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2022-01-31 17:39:11,751 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:39:11,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:39:11,751 INFO L85 PathProgramCache]: Analyzing trace with hash -2146410023, now seen corresponding path program 93 times [2022-01-31 17:39:11,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:39:11,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [446599204] [2022-01-31 17:39:11,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:39:11,752 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:39:11,752 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:39:11,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:39:11,777 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:39:11,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:39:14,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:39:14,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:39:14,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:39:14,471 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:39:14,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [446599204] [2022-01-31 17:39:14,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [446599204] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:39:14,471 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:39:14,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-01-31 17:39:14,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730358236] [2022-01-31 17:39:14,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:39:14,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-01-31 17:39:14,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:39:14,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-01-31 17:39:14,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4562, Invalid=4750, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 17:39:14,473 INFO L87 Difference]: Start difference. First operand 396 states and 400 transitions. Second operand has 97 states, 97 states have (on average 1.1443298969072164) internal successors, (111), 96 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:39:18,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:39:18,590 INFO L93 Difference]: Finished difference Result 696 states and 707 transitions. [2022-01-31 17:39:18,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-31 17:39:18,590 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.1443298969072164) internal successors, (111), 96 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 391 [2022-01-31 17:39:18,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:39:18,591 INFO L225 Difference]: With dead ends: 696 [2022-01-31 17:39:18,591 INFO L226 Difference]: Without dead ends: 400 [2022-01-31 17:39:18,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4464 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=13680, Invalid=22610, Unknown=0, NotChecked=0, Total=36290 [2022-01-31 17:39:18,593 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 1662 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 2089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1662 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:39:18,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 40 Invalid, 2089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1662 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:39:18,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2022-01-31 17:39:18,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 400. [2022-01-31 17:39:18,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 394 states have (on average 1.0126903553299493) internal successors, (399), 394 states have internal predecessors, (399), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:39:18,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 404 transitions. [2022-01-31 17:39:18,600 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 404 transitions. Word has length 391 [2022-01-31 17:39:18,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:39:18,600 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 404 transitions. [2022-01-31 17:39:18,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.1443298969072164) internal successors, (111), 96 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:39:18,600 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 404 transitions. [2022-01-31 17:39:18,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2022-01-31 17:39:18,602 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:39:18,602 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:39:18,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2022-01-31 17:39:18,602 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:39:18,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:39:18,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1631252773, now seen corresponding path program 94 times [2022-01-31 17:39:18,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:39:18,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [772545243] [2022-01-31 17:39:18,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:39:18,603 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:39:18,603 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:39:18,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:39:18,619 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:39:18,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:39:21,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:39:21,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:39:21,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:39:21,317 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:39:21,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [772545243] [2022-01-31 17:39:21,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [772545243] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:39:21,318 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:39:21,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-01-31 17:39:21,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524199374] [2022-01-31 17:39:21,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:39:21,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-01-31 17:39:21,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:39:21,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-01-31 17:39:21,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 17:39:21,319 INFO L87 Difference]: Start difference. First operand 400 states and 404 transitions. Second operand has 98 states, 98 states have (on average 1.1428571428571428) internal successors, (112), 97 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:39:25,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:39:25,483 INFO L93 Difference]: Finished difference Result 703 states and 714 transitions. [2022-01-31 17:39:25,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-01-31 17:39:25,483 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.1428571428571428) internal successors, (112), 97 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 395 [2022-01-31 17:39:25,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:39:25,485 INFO L225 Difference]: With dead ends: 703 [2022-01-31 17:39:25,485 INFO L226 Difference]: Without dead ends: 404 [2022-01-31 17:39:25,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4559 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=13968, Invalid=23088, Unknown=0, NotChecked=0, Total=37056 [2022-01-31 17:39:25,486 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 1497 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1497 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:39:25,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 50 Invalid, 1958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1497 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:39:25,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2022-01-31 17:39:25,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 404. [2022-01-31 17:39:25,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 398 states have (on average 1.0125628140703518) internal successors, (403), 398 states have internal predecessors, (403), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:39:25,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 408 transitions. [2022-01-31 17:39:25,496 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 408 transitions. Word has length 395 [2022-01-31 17:39:25,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:39:25,496 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 408 transitions. [2022-01-31 17:39:25,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 1.1428571428571428) internal successors, (112), 97 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:39:25,496 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 408 transitions. [2022-01-31 17:39:25,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2022-01-31 17:39:25,498 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:39:25,498 INFO L514 BasicCegarLoop]: trace histogram [95, 95, 95, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:39:25,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2022-01-31 17:39:25,499 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:39:25,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:39:25,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1597882087, now seen corresponding path program 95 times [2022-01-31 17:39:25,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:39:25,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [55286412] [2022-01-31 17:39:25,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:39:25,500 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:39:25,500 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:39:25,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:39:25,516 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:39:25,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:39:28,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:39:28,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:39:28,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:39:28,295 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:39:28,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [55286412] [2022-01-31 17:39:28,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [55286412] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:39:28,295 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:39:28,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-01-31 17:39:28,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798792789] [2022-01-31 17:39:28,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:39:28,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-01-31 17:39:28,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:39:28,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-01-31 17:39:28,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4755, Invalid=4947, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 17:39:28,298 INFO L87 Difference]: Start difference. First operand 404 states and 408 transitions. Second operand has 99 states, 99 states have (on average 1.1414141414141414) internal successors, (113), 98 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:39:32,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:39:32,640 INFO L93 Difference]: Finished difference Result 710 states and 721 transitions. [2022-01-31 17:39:32,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-01-31 17:39:32,640 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.1414141414141414) internal successors, (113), 98 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 399 [2022-01-31 17:39:32,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:39:32,641 INFO L225 Difference]: With dead ends: 710 [2022-01-31 17:39:32,641 INFO L226 Difference]: Without dead ends: 408 [2022-01-31 17:39:32,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4655 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=14259, Invalid=23571, Unknown=0, NotChecked=0, Total=37830 [2022-01-31 17:39:32,643 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 1570 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 2020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1570 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:39:32,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 45 Invalid, 2020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1570 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:39:32,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2022-01-31 17:39:32,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 408. [2022-01-31 17:39:32,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 402 states have (on average 1.0124378109452736) internal successors, (407), 402 states have internal predecessors, (407), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:39:32,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 412 transitions. [2022-01-31 17:39:32,650 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 412 transitions. Word has length 399 [2022-01-31 17:39:32,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:39:32,650 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 412 transitions. [2022-01-31 17:39:32,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.1414141414141414) internal successors, (113), 98 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:39:32,651 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 412 transitions. [2022-01-31 17:39:32,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 404 [2022-01-31 17:39:32,652 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:39:32,652 INFO L514 BasicCegarLoop]: trace histogram [96, 96, 96, 96, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:39:32,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2022-01-31 17:39:32,652 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:39:32,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:39:32,652 INFO L85 PathProgramCache]: Analyzing trace with hash 866477339, now seen corresponding path program 96 times [2022-01-31 17:39:32,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:39:32,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1983031021] [2022-01-31 17:39:32,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:39:32,654 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:39:32,654 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:39:32,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:39:32,671 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:39:32,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:39:35,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:39:35,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:39:35,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:39:35,489 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:39:35,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1983031021] [2022-01-31 17:39:35,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1983031021] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:39:35,489 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:39:35,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-01-31 17:39:35,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453589601] [2022-01-31 17:39:35,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:39:35,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-01-31 17:39:35,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:39:35,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-01-31 17:39:35,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2022-01-31 17:39:35,491 INFO L87 Difference]: Start difference. First operand 408 states and 412 transitions. Second operand has 100 states, 100 states have (on average 1.14) internal successors, (114), 99 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:39:39,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:39:39,861 INFO L93 Difference]: Finished difference Result 717 states and 728 transitions. [2022-01-31 17:39:39,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-01-31 17:39:39,861 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 1.14) internal successors, (114), 99 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 403 [2022-01-31 17:39:39,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:39:39,862 INFO L225 Difference]: With dead ends: 717 [2022-01-31 17:39:39,862 INFO L226 Difference]: Without dead ends: 412 [2022-01-31 17:39:39,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4752 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=14553, Invalid=24059, Unknown=0, NotChecked=0, Total=38612 [2022-01-31 17:39:39,864 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 1652 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 2091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1652 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:39:39,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 40 Invalid, 2091 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1652 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:39:39,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2022-01-31 17:39:39,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 412. [2022-01-31 17:39:39,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 406 states have (on average 1.0123152709359606) internal successors, (411), 406 states have internal predecessors, (411), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:39:39,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 416 transitions. [2022-01-31 17:39:39,872 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 416 transitions. Word has length 403 [2022-01-31 17:39:39,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:39:39,872 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 416 transitions. [2022-01-31 17:39:39,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 1.14) internal successors, (114), 99 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:39:39,872 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 416 transitions. [2022-01-31 17:39:39,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2022-01-31 17:39:39,873 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:39:39,873 INFO L514 BasicCegarLoop]: trace histogram [97, 97, 97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:39:39,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2022-01-31 17:39:39,873 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:39:39,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:39:39,874 INFO L85 PathProgramCache]: Analyzing trace with hash -243142567, now seen corresponding path program 97 times [2022-01-31 17:39:39,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:39:39,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1755569581] [2022-01-31 17:39:39,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:39:39,875 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:39:39,875 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:39:39,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:39:39,895 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:39:40,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:39:42,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:39:42,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:39:42,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:39:42,784 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:39:42,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1755569581] [2022-01-31 17:39:42,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1755569581] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:39:42,785 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:39:42,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-01-31 17:39:42,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727420535] [2022-01-31 17:39:42,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:39:42,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-01-31 17:39:42,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:39:42,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-01-31 17:39:42,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4952, Invalid=5148, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 17:39:42,787 INFO L87 Difference]: Start difference. First operand 412 states and 416 transitions. Second operand has 101 states, 101 states have (on average 1.1386138613861385) internal successors, (115), 100 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:39:47,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:39:47,236 INFO L93 Difference]: Finished difference Result 724 states and 735 transitions. [2022-01-31 17:39:47,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-01-31 17:39:47,236 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.1386138613861385) internal successors, (115), 100 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 407 [2022-01-31 17:39:47,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:39:47,237 INFO L225 Difference]: With dead ends: 724 [2022-01-31 17:39:47,237 INFO L226 Difference]: Without dead ends: 416 [2022-01-31 17:39:47,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4850 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=14850, Invalid=24552, Unknown=0, NotChecked=0, Total=39402 [2022-01-31 17:39:47,239 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 1653 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 2126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1653 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:39:47,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 50 Invalid, 2126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1653 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:39:47,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2022-01-31 17:39:47,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 416. [2022-01-31 17:39:47,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 410 states have (on average 1.0121951219512195) internal successors, (415), 410 states have internal predecessors, (415), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:39:47,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 420 transitions. [2022-01-31 17:39:47,246 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 420 transitions. Word has length 407 [2022-01-31 17:39:47,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:39:47,246 INFO L470 AbstractCegarLoop]: Abstraction has 416 states and 420 transitions. [2022-01-31 17:39:47,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.1386138613861385) internal successors, (115), 100 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:39:47,246 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 420 transitions. [2022-01-31 17:39:47,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2022-01-31 17:39:47,248 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:39:47,248 INFO L514 BasicCegarLoop]: trace histogram [98, 98, 98, 98, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:39:47,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2022-01-31 17:39:47,248 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:39:47,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:39:47,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1712991067, now seen corresponding path program 98 times [2022-01-31 17:39:47,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:39:47,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [170522725] [2022-01-31 17:39:47,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:39:47,249 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:39:47,250 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:39:47,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:39:47,269 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:39:47,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:39:50,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:39:50,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:39:50,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:39:50,154 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:39:50,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [170522725] [2022-01-31 17:39:50,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [170522725] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:39:50,154 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:39:50,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2022-01-31 17:39:50,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947158150] [2022-01-31 17:39:50,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:39:50,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-01-31 17:39:50,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:39:50,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-01-31 17:39:50,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2022-01-31 17:39:50,157 INFO L87 Difference]: Start difference. First operand 416 states and 420 transitions. Second operand has 102 states, 102 states have (on average 1.1372549019607843) internal successors, (116), 101 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:39:54,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:39:54,783 INFO L93 Difference]: Finished difference Result 731 states and 742 transitions. [2022-01-31 17:39:54,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-01-31 17:39:54,783 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 1.1372549019607843) internal successors, (116), 101 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 411 [2022-01-31 17:39:54,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:39:54,784 INFO L225 Difference]: With dead ends: 731 [2022-01-31 17:39:54,784 INFO L226 Difference]: Without dead ends: 420 [2022-01-31 17:39:54,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4949 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=15150, Invalid=25050, Unknown=0, NotChecked=0, Total=40200 [2022-01-31 17:39:54,786 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 1837 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 2284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1837 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:39:54,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 40 Invalid, 2284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1837 Valid, 447 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:39:54,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2022-01-31 17:39:54,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 420. [2022-01-31 17:39:54,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 414 states have (on average 1.0120772946859904) internal successors, (419), 414 states have internal predecessors, (419), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:39:54,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 424 transitions. [2022-01-31 17:39:54,794 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 424 transitions. Word has length 411 [2022-01-31 17:39:54,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:39:54,794 INFO L470 AbstractCegarLoop]: Abstraction has 420 states and 424 transitions. [2022-01-31 17:39:54,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 1.1372549019607843) internal successors, (116), 101 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:39:54,794 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 424 transitions. [2022-01-31 17:39:54,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 416 [2022-01-31 17:39:54,795 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:39:54,796 INFO L514 BasicCegarLoop]: trace histogram [99, 99, 99, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:39:54,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2022-01-31 17:39:54,796 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:39:54,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:39:54,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1418236007, now seen corresponding path program 99 times [2022-01-31 17:39:54,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:39:54,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [491151052] [2022-01-31 17:39:54,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:39:54,801 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:39:54,801 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:39:54,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:39:54,821 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:39:54,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:39:57,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:39:57,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:39:57,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:39:57,844 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:39:57,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [491151052] [2022-01-31 17:39:57,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [491151052] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:39:57,844 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:39:57,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2022-01-31 17:39:57,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479759141] [2022-01-31 17:39:57,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:39:57,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-01-31 17:39:57,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:39:57,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-01-31 17:39:57,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 17:39:57,847 INFO L87 Difference]: Start difference. First operand 420 states and 424 transitions. Second operand has 103 states, 103 states have (on average 1.1359223300970873) internal successors, (117), 102 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:40:02,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:40:02,458 INFO L93 Difference]: Finished difference Result 738 states and 749 transitions. [2022-01-31 17:40:02,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-01-31 17:40:02,458 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 1.1359223300970873) internal successors, (117), 102 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 415 [2022-01-31 17:40:02,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:40:02,463 INFO L225 Difference]: With dead ends: 738 [2022-01-31 17:40:02,463 INFO L226 Difference]: Without dead ends: 424 [2022-01-31 17:40:02,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5049 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=15453, Invalid=25553, Unknown=0, NotChecked=0, Total=41006 [2022-01-31 17:40:02,466 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 1567 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 2033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1567 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:40:02,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 45 Invalid, 2033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1567 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:40:02,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2022-01-31 17:40:02,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 424. [2022-01-31 17:40:02,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 418 states have (on average 1.0119617224880382) internal successors, (423), 418 states have internal predecessors, (423), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:40:02,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 428 transitions. [2022-01-31 17:40:02,474 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 428 transitions. Word has length 415 [2022-01-31 17:40:02,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:40:02,474 INFO L470 AbstractCegarLoop]: Abstraction has 424 states and 428 transitions. [2022-01-31 17:40:02,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 1.1359223300970873) internal successors, (117), 102 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:40:02,474 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 428 transitions. [2022-01-31 17:40:02,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2022-01-31 17:40:02,475 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:40:02,475 INFO L514 BasicCegarLoop]: trace histogram [100, 100, 100, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:40:02,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2022-01-31 17:40:02,476 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:40:02,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:40:02,476 INFO L85 PathProgramCache]: Analyzing trace with hash 794517915, now seen corresponding path program 100 times [2022-01-31 17:40:02,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:40:02,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1707675917] [2022-01-31 17:40:02,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:40:02,477 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:40:02,477 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:40:02,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:40:02,497 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:40:02,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:40:05,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:40:05,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:40:05,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:40:05,528 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:40:05,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1707675917] [2022-01-31 17:40:05,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1707675917] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:40:05,528 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:40:05,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2022-01-31 17:40:05,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337012262] [2022-01-31 17:40:05,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:40:05,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-01-31 17:40:05,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:40:05,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-01-31 17:40:05,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-01-31 17:40:05,531 INFO L87 Difference]: Start difference. First operand 424 states and 428 transitions. Second operand has 104 states, 104 states have (on average 1.1346153846153846) internal successors, (118), 103 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:40:10,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:40:10,517 INFO L93 Difference]: Finished difference Result 745 states and 756 transitions. [2022-01-31 17:40:10,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-01-31 17:40:10,517 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 1.1346153846153846) internal successors, (118), 103 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 419 [2022-01-31 17:40:10,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:40:10,518 INFO L225 Difference]: With dead ends: 745 [2022-01-31 17:40:10,518 INFO L226 Difference]: Without dead ends: 428 [2022-01-31 17:40:10,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5150 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=15759, Invalid=26061, Unknown=0, NotChecked=0, Total=41820 [2022-01-31 17:40:10,520 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 2249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 2704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2249 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:40:10,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 40 Invalid, 2704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2249 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:40:10,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2022-01-31 17:40:10,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 428. [2022-01-31 17:40:10,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 422 states have (on average 1.0118483412322274) internal successors, (427), 422 states have internal predecessors, (427), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:40:10,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 432 transitions. [2022-01-31 17:40:10,527 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 432 transitions. Word has length 419 [2022-01-31 17:40:10,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:40:10,527 INFO L470 AbstractCegarLoop]: Abstraction has 428 states and 432 transitions. [2022-01-31 17:40:10,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 1.1346153846153846) internal successors, (118), 103 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:40:10,527 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 432 transitions. [2022-01-31 17:40:10,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2022-01-31 17:40:10,529 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:40:10,529 INFO L514 BasicCegarLoop]: trace histogram [101, 101, 101, 101, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:40:10,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2022-01-31 17:40:10,529 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:40:10,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:40:10,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1228226855, now seen corresponding path program 101 times [2022-01-31 17:40:10,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:40:10,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2054634055] [2022-01-31 17:40:10,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:40:10,530 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:40:10,530 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:40:10,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:40:10,550 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:40:10,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:40:13,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:40:13,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:40:13,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:40:13,620 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:40:13,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2054634055] [2022-01-31 17:40:13,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2054634055] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:40:13,621 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:40:13,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2022-01-31 17:40:13,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958510476] [2022-01-31 17:40:13,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:40:13,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-01-31 17:40:13,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:40:13,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-01-31 17:40:13,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5358, Invalid=5562, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 17:40:13,623 INFO L87 Difference]: Start difference. First operand 428 states and 432 transitions. Second operand has 105 states, 105 states have (on average 1.1333333333333333) internal successors, (119), 104 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:40:18,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:40:18,467 INFO L93 Difference]: Finished difference Result 752 states and 763 transitions. [2022-01-31 17:40:18,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-01-31 17:40:18,467 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 1.1333333333333333) internal successors, (119), 104 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 423 [2022-01-31 17:40:18,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:40:18,468 INFO L225 Difference]: With dead ends: 752 [2022-01-31 17:40:18,468 INFO L226 Difference]: Without dead ends: 432 [2022-01-31 17:40:18,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5252 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=16068, Invalid=26574, Unknown=0, NotChecked=0, Total=42642 [2022-01-31 17:40:18,470 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 1682 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 2201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1682 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:40:18,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 60 Invalid, 2201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1682 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:40:18,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2022-01-31 17:40:18,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 432. [2022-01-31 17:40:18,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 426 states have (on average 1.011737089201878) internal successors, (431), 426 states have internal predecessors, (431), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:40:18,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 436 transitions. [2022-01-31 17:40:18,477 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 436 transitions. Word has length 423 [2022-01-31 17:40:18,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:40:18,477 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 436 transitions. [2022-01-31 17:40:18,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 1.1333333333333333) internal successors, (119), 104 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:40:18,477 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 436 transitions. [2022-01-31 17:40:18,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 428 [2022-01-31 17:40:18,492 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:40:18,492 INFO L514 BasicCegarLoop]: trace histogram [102, 102, 102, 102, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:40:18,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2022-01-31 17:40:18,492 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:40:18,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:40:18,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1449064485, now seen corresponding path program 102 times [2022-01-31 17:40:18,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:40:18,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1645844664] [2022-01-31 17:40:18,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:40:18,493 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:40:18,493 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:40:18,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:40:18,513 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:40:18,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:40:21,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:40:21,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:40:21,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:40:21,633 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:40:21,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1645844664] [2022-01-31 17:40:21,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1645844664] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:40:21,633 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:40:21,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2022-01-31 17:40:21,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205682816] [2022-01-31 17:40:21,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:40:21,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-01-31 17:40:21,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:40:21,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-01-31 17:40:21,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2022-01-31 17:40:21,636 INFO L87 Difference]: Start difference. First operand 432 states and 436 transitions. Second operand has 106 states, 106 states have (on average 1.1320754716981132) internal successors, (120), 105 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:40:26,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:40:26,680 INFO L93 Difference]: Finished difference Result 759 states and 770 transitions. [2022-01-31 17:40:26,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-01-31 17:40:26,681 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 1.1320754716981132) internal successors, (120), 105 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 427 [2022-01-31 17:40:26,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:40:26,681 INFO L225 Difference]: With dead ends: 759 [2022-01-31 17:40:26,681 INFO L226 Difference]: Without dead ends: 436 [2022-01-31 17:40:26,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5355 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=16380, Invalid=27092, Unknown=0, NotChecked=0, Total=43472 [2022-01-31 17:40:26,683 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 1924 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 2417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1924 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:40:26,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 50 Invalid, 2417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1924 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:40:26,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2022-01-31 17:40:26,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 436. [2022-01-31 17:40:26,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 430 states have (on average 1.0116279069767442) internal successors, (435), 430 states have internal predecessors, (435), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:40:26,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 440 transitions. [2022-01-31 17:40:26,690 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 440 transitions. Word has length 427 [2022-01-31 17:40:26,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:40:26,691 INFO L470 AbstractCegarLoop]: Abstraction has 436 states and 440 transitions. [2022-01-31 17:40:26,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 1.1320754716981132) internal successors, (120), 105 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:40:26,691 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 440 transitions. [2022-01-31 17:40:26,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 432 [2022-01-31 17:40:26,692 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:40:26,692 INFO L514 BasicCegarLoop]: trace histogram [103, 103, 103, 103, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:40:26,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2022-01-31 17:40:26,692 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:40:26,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:40:26,692 INFO L85 PathProgramCache]: Analyzing trace with hash 715382297, now seen corresponding path program 103 times [2022-01-31 17:40:26,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:40:26,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [589259420] [2022-01-31 17:40:26,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:40:26,693 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:40:26,693 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:40:26,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:40:26,714 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:40:26,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:40:29,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:40:29,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:40:29,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:40:29,912 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:40:29,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [589259420] [2022-01-31 17:40:29,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [589259420] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:40:29,912 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:40:29,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [107] imperfect sequences [] total 107 [2022-01-31 17:40:29,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049602679] [2022-01-31 17:40:29,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:40:29,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-01-31 17:40:29,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:40:29,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-01-31 17:40:29,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5567, Invalid=5775, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 17:40:29,915 INFO L87 Difference]: Start difference. First operand 436 states and 440 transitions. Second operand has 107 states, 107 states have (on average 1.1308411214953271) internal successors, (121), 106 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:40:34,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:40:34,883 INFO L93 Difference]: Finished difference Result 766 states and 777 transitions. [2022-01-31 17:40:34,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-01-31 17:40:34,884 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 1.1308411214953271) internal successors, (121), 106 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 431 [2022-01-31 17:40:34,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:40:34,884 INFO L225 Difference]: With dead ends: 766 [2022-01-31 17:40:34,884 INFO L226 Difference]: Without dead ends: 440 [2022-01-31 17:40:34,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5459 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=16695, Invalid=27615, Unknown=0, NotChecked=0, Total=44310 [2022-01-31 17:40:34,886 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 1580 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 2092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1580 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:40:34,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 55 Invalid, 2092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1580 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:40:34,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2022-01-31 17:40:34,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 440. [2022-01-31 17:40:34,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 434 states have (on average 1.0115207373271888) internal successors, (439), 434 states have internal predecessors, (439), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:40:34,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 444 transitions. [2022-01-31 17:40:34,894 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 444 transitions. Word has length 431 [2022-01-31 17:40:34,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:40:34,894 INFO L470 AbstractCegarLoop]: Abstraction has 440 states and 444 transitions. [2022-01-31 17:40:34,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 1.1308411214953271) internal successors, (121), 106 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:40:34,894 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 444 transitions. [2022-01-31 17:40:34,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2022-01-31 17:40:34,895 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:40:34,896 INFO L514 BasicCegarLoop]: trace histogram [104, 104, 104, 104, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:40:34,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2022-01-31 17:40:34,896 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:40:34,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:40:34,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1876746725, now seen corresponding path program 104 times [2022-01-31 17:40:34,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:40:34,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1478323063] [2022-01-31 17:40:34,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:40:34,897 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:40:34,897 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:40:34,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:40:34,918 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:40:35,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:40:38,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:40:38,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:40:38,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:40:38,176 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:40:38,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1478323063] [2022-01-31 17:40:38,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1478323063] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:40:38,176 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:40:38,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2022-01-31 17:40:38,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789165555] [2022-01-31 17:40:38,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:40:38,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-01-31 17:40:38,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:40:38,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-01-31 17:40:38,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5673, Invalid=5883, Unknown=0, NotChecked=0, Total=11556 [2022-01-31 17:40:38,179 INFO L87 Difference]: Start difference. First operand 440 states and 444 transitions. Second operand has 108 states, 108 states have (on average 1.1296296296296295) internal successors, (122), 107 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:40:43,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:40:43,373 INFO L93 Difference]: Finished difference Result 773 states and 784 transitions. [2022-01-31 17:40:43,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-01-31 17:40:43,374 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 1.1296296296296295) internal successors, (122), 107 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 435 [2022-01-31 17:40:43,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:40:43,374 INFO L225 Difference]: With dead ends: 773 [2022-01-31 17:40:43,374 INFO L226 Difference]: Without dead ends: 444 [2022-01-31 17:40:43,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5564 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=17013, Invalid=28143, Unknown=0, NotChecked=0, Total=45156 [2022-01-31 17:40:43,376 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 1570 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 2146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1570 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:40:43,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 75 Invalid, 2146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1570 Valid, 576 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:40:43,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2022-01-31 17:40:43,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 444. [2022-01-31 17:40:43,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 438 states have (on average 1.0114155251141552) internal successors, (443), 438 states have internal predecessors, (443), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:40:43,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 448 transitions. [2022-01-31 17:40:43,384 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 448 transitions. Word has length 435 [2022-01-31 17:40:43,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:40:43,384 INFO L470 AbstractCegarLoop]: Abstraction has 444 states and 448 transitions. [2022-01-31 17:40:43,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 1.1296296296296295) internal successors, (122), 107 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:40:43,384 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 448 transitions. [2022-01-31 17:40:43,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 440 [2022-01-31 17:40:43,385 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:40:43,385 INFO L514 BasicCegarLoop]: trace histogram [105, 105, 105, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:40:43,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2022-01-31 17:40:43,385 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:40:43,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:40:43,386 INFO L85 PathProgramCache]: Analyzing trace with hash -852832935, now seen corresponding path program 105 times [2022-01-31 17:40:43,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:40:43,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [426743781] [2022-01-31 17:40:43,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:40:43,386 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:40:43,386 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:40:43,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:40:43,407 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:40:43,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:40:46,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:40:46,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:40:46,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:40:46,741 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:40:46,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [426743781] [2022-01-31 17:40:46,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [426743781] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:40:46,741 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:40:46,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [109] imperfect sequences [] total 109 [2022-01-31 17:40:46,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115592702] [2022-01-31 17:40:46,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:40:46,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-01-31 17:40:46,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:40:46,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-01-31 17:40:46,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5780, Invalid=5992, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 17:40:46,744 INFO L87 Difference]: Start difference. First operand 444 states and 448 transitions. Second operand has 109 states, 109 states have (on average 1.128440366972477) internal successors, (123), 108 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:40:52,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:40:52,032 INFO L93 Difference]: Finished difference Result 780 states and 791 transitions. [2022-01-31 17:40:52,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-01-31 17:40:52,032 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 1.128440366972477) internal successors, (123), 108 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 439 [2022-01-31 17:40:52,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:40:52,033 INFO L225 Difference]: With dead ends: 780 [2022-01-31 17:40:52,033 INFO L226 Difference]: Without dead ends: 448 [2022-01-31 17:40:52,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5670 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=17334, Invalid=28676, Unknown=0, NotChecked=0, Total=46010 [2022-01-31 17:40:52,035 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 1751 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 2271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1751 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:40:52,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 55 Invalid, 2271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1751 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:40:52,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2022-01-31 17:40:52,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 448. [2022-01-31 17:40:52,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 442 states have (on average 1.01131221719457) internal successors, (447), 442 states have internal predecessors, (447), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:40:52,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 452 transitions. [2022-01-31 17:40:52,042 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 452 transitions. Word has length 439 [2022-01-31 17:40:52,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:40:52,043 INFO L470 AbstractCegarLoop]: Abstraction has 448 states and 452 transitions. [2022-01-31 17:40:52,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 1.128440366972477) internal successors, (123), 108 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:40:52,043 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 452 transitions. [2022-01-31 17:40:52,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2022-01-31 17:40:52,044 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:40:52,044 INFO L514 BasicCegarLoop]: trace histogram [106, 106, 106, 106, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:40:52,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2022-01-31 17:40:52,044 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:40:52,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:40:52,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1088838565, now seen corresponding path program 106 times [2022-01-31 17:40:52,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:40:52,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1179457518] [2022-01-31 17:40:52,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:40:52,045 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:40:52,045 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:40:52,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:40:52,067 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:40:52,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:40:55,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:40:55,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:40:55,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:40:55,447 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:40:55,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1179457518] [2022-01-31 17:40:55,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1179457518] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:40:55,447 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:40:55,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [110] imperfect sequences [] total 110 [2022-01-31 17:40:55,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927725329] [2022-01-31 17:40:55,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:40:55,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-01-31 17:40:55,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:40:55,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-01-31 17:40:55,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5888, Invalid=6102, Unknown=0, NotChecked=0, Total=11990 [2022-01-31 17:40:55,449 INFO L87 Difference]: Start difference. First operand 448 states and 452 transitions. Second operand has 110 states, 110 states have (on average 1.1272727272727272) internal successors, (124), 109 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:41:00,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:41:00,706 INFO L93 Difference]: Finished difference Result 787 states and 798 transitions. [2022-01-31 17:41:00,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-01-31 17:41:00,706 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 1.1272727272727272) internal successors, (124), 109 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 443 [2022-01-31 17:41:00,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:41:00,707 INFO L225 Difference]: With dead ends: 787 [2022-01-31 17:41:00,707 INFO L226 Difference]: Without dead ends: 452 [2022-01-31 17:41:00,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5777 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=17658, Invalid=29214, Unknown=0, NotChecked=0, Total=46872 [2022-01-31 17:41:00,709 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 1587 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 2126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1587 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:41:00,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 60 Invalid, 2126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1587 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:41:00,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2022-01-31 17:41:00,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 452. [2022-01-31 17:41:00,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 446 states have (on average 1.0112107623318385) internal successors, (451), 446 states have internal predecessors, (451), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:41:00,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 456 transitions. [2022-01-31 17:41:00,716 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 456 transitions. Word has length 443 [2022-01-31 17:41:00,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:41:00,716 INFO L470 AbstractCegarLoop]: Abstraction has 452 states and 456 transitions. [2022-01-31 17:41:00,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 1.1272727272727272) internal successors, (124), 109 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:41:00,716 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 456 transitions. [2022-01-31 17:41:00,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2022-01-31 17:41:00,718 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:41:00,718 INFO L514 BasicCegarLoop]: trace histogram [107, 107, 107, 107, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:41:00,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2022-01-31 17:41:00,718 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:41:00,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:41:00,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1819833191, now seen corresponding path program 107 times [2022-01-31 17:41:00,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:41:00,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [324112424] [2022-01-31 17:41:00,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:41:00,719 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:41:00,719 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:41:00,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:41:00,740 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:41:00,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:41:04,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:41:04,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:41:04,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:41:04,176 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:41:04,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [324112424] [2022-01-31 17:41:04,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [324112424] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:41:04,176 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:41:04,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [111] imperfect sequences [] total 111 [2022-01-31 17:41:04,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120932936] [2022-01-31 17:41:04,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:41:04,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-01-31 17:41:04,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:41:04,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-01-31 17:41:04,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5997, Invalid=6213, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 17:41:04,180 INFO L87 Difference]: Start difference. First operand 452 states and 456 transitions. Second operand has 111 states, 111 states have (on average 1.1261261261261262) internal successors, (125), 110 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:41:09,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:41:09,626 INFO L93 Difference]: Finished difference Result 794 states and 805 transitions. [2022-01-31 17:41:09,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-01-31 17:41:09,626 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 1.1261261261261262) internal successors, (125), 110 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 447 [2022-01-31 17:41:09,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:41:09,627 INFO L225 Difference]: With dead ends: 794 [2022-01-31 17:41:09,627 INFO L226 Difference]: Without dead ends: 456 [2022-01-31 17:41:09,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5885 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=17985, Invalid=29757, Unknown=0, NotChecked=0, Total=47742 [2022-01-31 17:41:09,629 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 1731 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 2334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1731 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:41:09,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 80 Invalid, 2334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1731 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:41:09,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2022-01-31 17:41:09,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 456. [2022-01-31 17:41:09,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 450 states have (on average 1.011111111111111) internal successors, (455), 450 states have internal predecessors, (455), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:41:09,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 460 transitions. [2022-01-31 17:41:09,636 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 460 transitions. Word has length 447 [2022-01-31 17:41:09,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:41:09,636 INFO L470 AbstractCegarLoop]: Abstraction has 456 states and 460 transitions. [2022-01-31 17:41:09,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 1.1261261261261262) internal successors, (125), 110 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:41:09,636 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 460 transitions. [2022-01-31 17:41:09,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2022-01-31 17:41:09,638 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:41:09,638 INFO L514 BasicCegarLoop]: trace histogram [108, 108, 108, 108, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:41:09,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2022-01-31 17:41:09,638 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:41:09,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:41:09,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1279485285, now seen corresponding path program 108 times [2022-01-31 17:41:09,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:41:09,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [857743814] [2022-01-31 17:41:09,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:41:09,639 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:41:09,639 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:41:09,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:41:09,662 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:41:09,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:41:13,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:41:13,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:41:13,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:41:13,210 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:41:13,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [857743814] [2022-01-31 17:41:13,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [857743814] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:41:13,210 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:41:13,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [112] imperfect sequences [] total 112 [2022-01-31 17:41:13,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167927719] [2022-01-31 17:41:13,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:41:13,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-01-31 17:41:13,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:41:13,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-01-31 17:41:13,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6107, Invalid=6325, Unknown=0, NotChecked=0, Total=12432 [2022-01-31 17:41:13,212 INFO L87 Difference]: Start difference. First operand 456 states and 460 transitions. Second operand has 112 states, 112 states have (on average 1.125) internal successors, (126), 111 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:41:18,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:41:18,770 INFO L93 Difference]: Finished difference Result 801 states and 812 transitions. [2022-01-31 17:41:18,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-01-31 17:41:18,770 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 1.125) internal successors, (126), 111 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 451 [2022-01-31 17:41:18,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:41:18,771 INFO L225 Difference]: With dead ends: 801 [2022-01-31 17:41:18,771 INFO L226 Difference]: Without dead ends: 460 [2022-01-31 17:41:18,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5994 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=18315, Invalid=30305, Unknown=0, NotChecked=0, Total=48620 [2022-01-31 17:41:18,773 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 1690 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 2237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1690 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:41:18,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 60 Invalid, 2237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1690 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:41:18,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2022-01-31 17:41:18,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 460. [2022-01-31 17:41:18,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 454 states have (on average 1.0110132158590308) internal successors, (459), 454 states have internal predecessors, (459), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:41:18,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 464 transitions. [2022-01-31 17:41:18,780 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 464 transitions. Word has length 451 [2022-01-31 17:41:18,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:41:18,780 INFO L470 AbstractCegarLoop]: Abstraction has 460 states and 464 transitions. [2022-01-31 17:41:18,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 1.125) internal successors, (126), 111 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:41:18,780 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 464 transitions. [2022-01-31 17:41:18,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2022-01-31 17:41:18,782 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:41:18,782 INFO L514 BasicCegarLoop]: trace histogram [109, 109, 109, 109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:41:18,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2022-01-31 17:41:18,782 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:41:18,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:41:18,782 INFO L85 PathProgramCache]: Analyzing trace with hash 568466393, now seen corresponding path program 109 times [2022-01-31 17:41:18,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:41:18,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [956999023] [2022-01-31 17:41:18,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:41:18,783 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:41:18,783 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:41:18,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:41:18,807 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:41:18,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:41:22,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:41:22,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:41:22,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:41:22,413 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:41:22,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [956999023] [2022-01-31 17:41:22,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [956999023] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:41:22,414 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:41:22,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [113] imperfect sequences [] total 113 [2022-01-31 17:41:22,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363029811] [2022-01-31 17:41:22,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:41:22,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-01-31 17:41:22,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:41:22,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-01-31 17:41:22,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6218, Invalid=6438, Unknown=0, NotChecked=0, Total=12656 [2022-01-31 17:41:22,416 INFO L87 Difference]: Start difference. First operand 460 states and 464 transitions. Second operand has 113 states, 113 states have (on average 1.1238938053097345) internal successors, (127), 112 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:41:28,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:41:28,025 INFO L93 Difference]: Finished difference Result 808 states and 819 transitions. [2022-01-31 17:41:28,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-01-31 17:41:28,026 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 1.1238938053097345) internal successors, (127), 112 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 455 [2022-01-31 17:41:28,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:41:28,026 INFO L225 Difference]: With dead ends: 808 [2022-01-31 17:41:28,026 INFO L226 Difference]: Without dead ends: 464 [2022-01-31 17:41:28,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6104 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=18648, Invalid=30858, Unknown=0, NotChecked=0, Total=49506 [2022-01-31 17:41:28,028 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 1616 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 2167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1616 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:41:28,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 60 Invalid, 2167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1616 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:41:28,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2022-01-31 17:41:28,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 464. [2022-01-31 17:41:28,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 458 states have (on average 1.0109170305676856) internal successors, (463), 458 states have internal predecessors, (463), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:41:28,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 468 transitions. [2022-01-31 17:41:28,036 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 468 transitions. Word has length 455 [2022-01-31 17:41:28,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:41:28,036 INFO L470 AbstractCegarLoop]: Abstraction has 464 states and 468 transitions. [2022-01-31 17:41:28,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 1.1238938053097345) internal successors, (127), 112 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:41:28,036 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 468 transitions. [2022-01-31 17:41:28,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2022-01-31 17:41:28,038 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:41:28,038 INFO L514 BasicCegarLoop]: trace histogram [110, 110, 110, 110, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:41:28,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2022-01-31 17:41:28,038 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:41:28,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:41:28,038 INFO L85 PathProgramCache]: Analyzing trace with hash 205783259, now seen corresponding path program 110 times [2022-01-31 17:41:28,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:41:28,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [113064839] [2022-01-31 17:41:28,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:41:28,039 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:41:28,039 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:41:28,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:41:28,061 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:41:28,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:41:31,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:41:31,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:41:31,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:41:31,678 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:41:31,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [113064839] [2022-01-31 17:41:31,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [113064839] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:41:31,679 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:41:31,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [114] imperfect sequences [] total 114 [2022-01-31 17:41:31,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477153244] [2022-01-31 17:41:31,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:41:31,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2022-01-31 17:41:31,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:41:31,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2022-01-31 17:41:31,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6330, Invalid=6552, Unknown=0, NotChecked=0, Total=12882 [2022-01-31 17:41:31,682 INFO L87 Difference]: Start difference. First operand 464 states and 468 transitions. Second operand has 114 states, 114 states have (on average 1.1228070175438596) internal successors, (128), 113 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:41:37,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:41:37,571 INFO L93 Difference]: Finished difference Result 815 states and 826 transitions. [2022-01-31 17:41:37,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-01-31 17:41:37,572 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 1.1228070175438596) internal successors, (128), 113 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 459 [2022-01-31 17:41:37,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:41:37,572 INFO L225 Difference]: With dead ends: 815 [2022-01-31 17:41:37,572 INFO L226 Difference]: Without dead ends: 468 [2022-01-31 17:41:37,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6215 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=18984, Invalid=31416, Unknown=0, NotChecked=0, Total=50400 [2022-01-31 17:41:37,576 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 2032 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 2527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2032 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:41:37,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 40 Invalid, 2527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2032 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:41:37,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2022-01-31 17:41:37,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 468. [2022-01-31 17:41:37,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 462 states have (on average 1.0108225108225108) internal successors, (467), 462 states have internal predecessors, (467), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:41:37,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 472 transitions. [2022-01-31 17:41:37,583 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 472 transitions. Word has length 459 [2022-01-31 17:41:37,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:41:37,583 INFO L470 AbstractCegarLoop]: Abstraction has 468 states and 472 transitions. [2022-01-31 17:41:37,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 1.1228070175438596) internal successors, (128), 113 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:41:37,584 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 472 transitions. [2022-01-31 17:41:37,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2022-01-31 17:41:37,585 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:41:37,585 INFO L514 BasicCegarLoop]: trace histogram [111, 111, 111, 111, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:41:37,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2022-01-31 17:41:37,585 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:41:37,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:41:37,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1264745241, now seen corresponding path program 111 times [2022-01-31 17:41:37,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:41:37,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [18403289] [2022-01-31 17:41:37,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:41:37,586 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:41:37,586 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:41:37,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:41:37,615 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:41:37,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:41:41,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:41:41,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:41:41,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:41:41,346 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:41:41,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [18403289] [2022-01-31 17:41:41,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [18403289] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:41:41,346 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:41:41,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [115] imperfect sequences [] total 115 [2022-01-31 17:41:41,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123486141] [2022-01-31 17:41:41,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:41:41,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-01-31 17:41:41,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:41:41,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-01-31 17:41:41,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6443, Invalid=6667, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 17:41:41,349 INFO L87 Difference]: Start difference. First operand 468 states and 472 transitions. Second operand has 115 states, 115 states have (on average 1.1217391304347826) internal successors, (129), 114 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:41:47,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:41:47,274 INFO L93 Difference]: Finished difference Result 822 states and 833 transitions. [2022-01-31 17:41:47,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-01-31 17:41:47,274 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 1.1217391304347826) internal successors, (129), 114 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 463 [2022-01-31 17:41:47,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:41:47,275 INFO L225 Difference]: With dead ends: 822 [2022-01-31 17:41:47,275 INFO L226 Difference]: Without dead ends: 472 [2022-01-31 17:41:47,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6327 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=19323, Invalid=31979, Unknown=0, NotChecked=0, Total=51302 [2022-01-31 17:41:47,277 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 1850 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 2379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1850 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:41:47,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 50 Invalid, 2379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1850 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:41:47,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2022-01-31 17:41:47,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 472. [2022-01-31 17:41:47,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 466 states have (on average 1.0107296137339057) internal successors, (471), 466 states have internal predecessors, (471), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:41:47,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 476 transitions. [2022-01-31 17:41:47,285 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 476 transitions. Word has length 463 [2022-01-31 17:41:47,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:41:47,285 INFO L470 AbstractCegarLoop]: Abstraction has 472 states and 476 transitions. [2022-01-31 17:41:47,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 1.1217391304347826) internal successors, (129), 114 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:41:47,285 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 476 transitions. [2022-01-31 17:41:47,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2022-01-31 17:41:47,287 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:41:47,287 INFO L514 BasicCegarLoop]: trace histogram [112, 112, 112, 112, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:41:47,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2022-01-31 17:41:47,287 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:41:47,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:41:47,287 INFO L85 PathProgramCache]: Analyzing trace with hash 132634395, now seen corresponding path program 112 times [2022-01-31 17:41:47,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:41:47,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [141240933] [2022-01-31 17:41:47,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:41:47,288 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:41:47,288 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:41:47,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:41:47,314 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:41:47,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:41:51,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:41:51,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:41:51,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:41:51,056 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:41:51,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [141240933] [2022-01-31 17:41:51,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [141240933] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:41:51,056 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:41:51,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [116] imperfect sequences [] total 116 [2022-01-31 17:41:51,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388345073] [2022-01-31 17:41:51,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:41:51,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-01-31 17:41:51,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:41:51,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-01-31 17:41:51,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6557, Invalid=6783, Unknown=0, NotChecked=0, Total=13340 [2022-01-31 17:41:51,059 INFO L87 Difference]: Start difference. First operand 472 states and 476 transitions. Second operand has 116 states, 116 states have (on average 1.1206896551724137) internal successors, (130), 115 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:41:57,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:41:57,228 INFO L93 Difference]: Finished difference Result 829 states and 840 transitions. [2022-01-31 17:41:57,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-01-31 17:41:57,229 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 1.1206896551724137) internal successors, (130), 115 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 467 [2022-01-31 17:41:57,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:41:57,229 INFO L225 Difference]: With dead ends: 829 [2022-01-31 17:41:57,229 INFO L226 Difference]: Without dead ends: 476 [2022-01-31 17:41:57,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6440 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=19665, Invalid=32547, Unknown=0, NotChecked=0, Total=52212 [2022-01-31 17:41:57,231 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 2039 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 2542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2039 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:41:57,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 40 Invalid, 2542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2039 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:41:57,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2022-01-31 17:41:57,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 476. [2022-01-31 17:41:57,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 470 states have (on average 1.0106382978723405) internal successors, (475), 470 states have internal predecessors, (475), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:41:57,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 480 transitions. [2022-01-31 17:41:57,240 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 480 transitions. Word has length 467 [2022-01-31 17:41:57,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:41:57,241 INFO L470 AbstractCegarLoop]: Abstraction has 476 states and 480 transitions. [2022-01-31 17:41:57,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 1.1206896551724137) internal successors, (130), 115 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:41:57,241 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 480 transitions. [2022-01-31 17:41:57,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2022-01-31 17:41:57,243 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:41:57,243 INFO L514 BasicCegarLoop]: trace histogram [113, 113, 113, 113, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:41:57,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2022-01-31 17:41:57,243 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:41:57,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:41:57,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1842304423, now seen corresponding path program 113 times [2022-01-31 17:41:57,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:41:57,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1129908905] [2022-01-31 17:41:57,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:41:57,244 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:41:57,244 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:41:57,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:41:57,297 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:41:57,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:42:01,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:42:01,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:42:01,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:42:01,054 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:42:01,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1129908905] [2022-01-31 17:42:01,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1129908905] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:42:01,054 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:42:01,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [117] imperfect sequences [] total 117 [2022-01-31 17:42:01,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328025899] [2022-01-31 17:42:01,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:42:01,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-01-31 17:42:01,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:42:01,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-01-31 17:42:01,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6672, Invalid=6900, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 17:42:01,086 INFO L87 Difference]: Start difference. First operand 476 states and 480 transitions. Second operand has 117 states, 117 states have (on average 1.1196581196581197) internal successors, (131), 116 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:42:07,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:42:07,262 INFO L93 Difference]: Finished difference Result 836 states and 847 transitions. [2022-01-31 17:42:07,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-01-31 17:42:07,263 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 1.1196581196581197) internal successors, (131), 116 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 471 [2022-01-31 17:42:07,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:42:07,263 INFO L225 Difference]: With dead ends: 836 [2022-01-31 17:42:07,263 INFO L226 Difference]: Without dead ends: 480 [2022-01-31 17:42:07,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6554 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=20010, Invalid=33120, Unknown=0, NotChecked=0, Total=53130 [2022-01-31 17:42:07,265 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 1827 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 2349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1827 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:42:07,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 45 Invalid, 2349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1827 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:42:07,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2022-01-31 17:42:07,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 480. [2022-01-31 17:42:07,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 474 states have (on average 1.010548523206751) internal successors, (479), 474 states have internal predecessors, (479), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:42:07,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 484 transitions. [2022-01-31 17:42:07,273 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 484 transitions. Word has length 471 [2022-01-31 17:42:07,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:42:07,273 INFO L470 AbstractCegarLoop]: Abstraction has 480 states and 484 transitions. [2022-01-31 17:42:07,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 1.1196581196581197) internal successors, (131), 116 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:42:07,273 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 484 transitions. [2022-01-31 17:42:07,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2022-01-31 17:42:07,275 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:42:07,275 INFO L514 BasicCegarLoop]: trace histogram [114, 114, 114, 114, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:42:07,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2022-01-31 17:42:07,275 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:42:07,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:42:07,275 INFO L85 PathProgramCache]: Analyzing trace with hash 115350875, now seen corresponding path program 114 times [2022-01-31 17:42:07,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:42:07,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [530409761] [2022-01-31 17:42:07,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:42:07,276 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:42:07,276 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:42:07,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:42:07,304 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:42:07,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:42:11,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:42:11,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:42:11,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:42:11,181 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:42:11,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [530409761] [2022-01-31 17:42:11,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [530409761] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:42:11,181 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:42:11,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [118] imperfect sequences [] total 118 [2022-01-31 17:42:11,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582250845] [2022-01-31 17:42:11,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:42:11,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2022-01-31 17:42:11,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:42:11,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2022-01-31 17:42:11,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6788, Invalid=7018, Unknown=0, NotChecked=0, Total=13806 [2022-01-31 17:42:11,185 INFO L87 Difference]: Start difference. First operand 480 states and 484 transitions. Second operand has 118 states, 118 states have (on average 1.11864406779661) internal successors, (132), 117 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:42:17,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:42:17,366 INFO L93 Difference]: Finished difference Result 843 states and 854 transitions. [2022-01-31 17:42:17,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-01-31 17:42:17,367 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 1.11864406779661) internal successors, (132), 117 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 475 [2022-01-31 17:42:17,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:42:17,367 INFO L225 Difference]: With dead ends: 843 [2022-01-31 17:42:17,367 INFO L226 Difference]: Without dead ends: 484 [2022-01-31 17:42:17,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6669 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=20358, Invalid=33698, Unknown=0, NotChecked=0, Total=54056 [2022-01-31 17:42:17,369 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 1806 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 2392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1806 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:42:17,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 65 Invalid, 2392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1806 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:42:17,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2022-01-31 17:42:17,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 484. [2022-01-31 17:42:17,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 478 states have (on average 1.0104602510460252) internal successors, (483), 478 states have internal predecessors, (483), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:42:17,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 488 transitions. [2022-01-31 17:42:17,377 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 488 transitions. Word has length 475 [2022-01-31 17:42:17,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:42:17,377 INFO L470 AbstractCegarLoop]: Abstraction has 484 states and 488 transitions. [2022-01-31 17:42:17,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 1.11864406779661) internal successors, (132), 117 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:42:17,377 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 488 transitions. [2022-01-31 17:42:17,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2022-01-31 17:42:17,379 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:42:17,379 INFO L514 BasicCegarLoop]: trace histogram [115, 115, 115, 115, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:42:17,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2022-01-31 17:42:17,379 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:42:17,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:42:17,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1485526631, now seen corresponding path program 115 times [2022-01-31 17:42:17,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:42:17,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [362968468] [2022-01-31 17:42:17,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:42:17,380 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:42:17,380 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:42:17,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:42:17,407 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:42:17,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:42:21,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:42:21,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:42:21,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:42:21,342 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:42:21,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [362968468] [2022-01-31 17:42:21,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [362968468] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:42:21,342 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:42:21,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [119] imperfect sequences [] total 119 [2022-01-31 17:42:21,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514272262] [2022-01-31 17:42:21,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:42:21,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-01-31 17:42:21,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:42:21,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-01-31 17:42:21,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6905, Invalid=7137, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 17:42:21,345 INFO L87 Difference]: Start difference. First operand 484 states and 488 transitions. Second operand has 119 states, 119 states have (on average 1.1176470588235294) internal successors, (133), 118 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:42:27,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:42:27,750 INFO L93 Difference]: Finished difference Result 850 states and 861 transitions. [2022-01-31 17:42:27,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-01-31 17:42:27,750 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 1.1176470588235294) internal successors, (133), 118 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 479 [2022-01-31 17:42:27,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:42:27,751 INFO L225 Difference]: With dead ends: 850 [2022-01-31 17:42:27,751 INFO L226 Difference]: Without dead ends: 488 [2022-01-31 17:42:27,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6785 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=20709, Invalid=34281, Unknown=0, NotChecked=0, Total=54990 [2022-01-31 17:42:27,753 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 2053 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 2583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2053 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:42:27,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 45 Invalid, 2583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2053 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:42:27,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2022-01-31 17:42:27,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 488. [2022-01-31 17:42:27,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 482 states have (on average 1.0103734439834025) internal successors, (487), 482 states have internal predecessors, (487), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:42:27,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 492 transitions. [2022-01-31 17:42:27,761 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 492 transitions. Word has length 479 [2022-01-31 17:42:27,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:42:27,761 INFO L470 AbstractCegarLoop]: Abstraction has 488 states and 492 transitions. [2022-01-31 17:42:27,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 1.1176470588235294) internal successors, (133), 118 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:42:27,761 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 492 transitions. [2022-01-31 17:42:27,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2022-01-31 17:42:27,763 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:42:27,763 INFO L514 BasicCegarLoop]: trace histogram [116, 116, 116, 116, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:42:27,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2022-01-31 17:42:27,763 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:42:27,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:42:27,763 INFO L85 PathProgramCache]: Analyzing trace with hash 174379931, now seen corresponding path program 116 times [2022-01-31 17:42:27,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:42:27,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2084932857] [2022-01-31 17:42:27,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:42:27,764 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:42:27,764 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:42:27,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:42:27,792 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:42:27,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:42:31,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:42:31,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:42:31,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:42:31,765 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:42:31,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2084932857] [2022-01-31 17:42:31,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2084932857] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:42:31,765 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:42:31,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [120] imperfect sequences [] total 120 [2022-01-31 17:42:31,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875788921] [2022-01-31 17:42:31,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:42:31,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2022-01-31 17:42:31,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:42:31,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2022-01-31 17:42:31,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7023, Invalid=7257, Unknown=0, NotChecked=0, Total=14280 [2022-01-31 17:42:31,769 INFO L87 Difference]: Start difference. First operand 488 states and 492 transitions. Second operand has 120 states, 120 states have (on average 1.1166666666666667) internal successors, (134), 119 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:42:38,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:42:38,411 INFO L93 Difference]: Finished difference Result 857 states and 868 transitions. [2022-01-31 17:42:38,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-01-31 17:42:38,411 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 1.1166666666666667) internal successors, (134), 119 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 483 [2022-01-31 17:42:38,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:42:38,412 INFO L225 Difference]: With dead ends: 857 [2022-01-31 17:42:38,412 INFO L226 Difference]: Without dead ends: 492 [2022-01-31 17:42:38,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6902 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=21063, Invalid=34869, Unknown=0, NotChecked=0, Total=55932 [2022-01-31 17:42:38,414 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 2116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 2650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2116 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:42:38,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 45 Invalid, 2650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2116 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:42:38,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2022-01-31 17:42:38,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 492. [2022-01-31 17:42:38,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 486 states have (on average 1.0102880658436213) internal successors, (491), 486 states have internal predecessors, (491), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:42:38,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 496 transitions. [2022-01-31 17:42:38,422 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 496 transitions. Word has length 483 [2022-01-31 17:42:38,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:42:38,422 INFO L470 AbstractCegarLoop]: Abstraction has 492 states and 496 transitions. [2022-01-31 17:42:38,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 120 states have (on average 1.1166666666666667) internal successors, (134), 119 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:42:38,422 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 496 transitions. [2022-01-31 17:42:38,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2022-01-31 17:42:38,424 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:42:38,424 INFO L514 BasicCegarLoop]: trace histogram [117, 117, 117, 117, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:42:38,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2022-01-31 17:42:38,424 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:42:38,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:42:38,424 INFO L85 PathProgramCache]: Analyzing trace with hash -346654503, now seen corresponding path program 117 times [2022-01-31 17:42:38,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:42:38,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [926508371] [2022-01-31 17:42:38,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:42:38,425 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:42:38,425 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:42:38,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:42:38,452 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:42:38,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:42:42,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:42:42,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:42:42,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:42:42,464 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:42:42,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [926508371] [2022-01-31 17:42:42,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [926508371] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:42:42,464 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:42:42,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [121] imperfect sequences [] total 121 [2022-01-31 17:42:42,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856663280] [2022-01-31 17:42:42,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:42:42,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2022-01-31 17:42:42,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:42:42,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2022-01-31 17:42:42,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7142, Invalid=7378, Unknown=0, NotChecked=0, Total=14520 [2022-01-31 17:42:42,467 INFO L87 Difference]: Start difference. First operand 492 states and 496 transitions. Second operand has 121 states, 121 states have (on average 1.115702479338843) internal successors, (135), 120 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:42:48,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:42:48,960 INFO L93 Difference]: Finished difference Result 864 states and 875 transitions. [2022-01-31 17:42:48,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-01-31 17:42:48,960 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 1.115702479338843) internal successors, (135), 120 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 487 [2022-01-31 17:42:48,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:42:48,961 INFO L225 Difference]: With dead ends: 864 [2022-01-31 17:42:48,961 INFO L226 Difference]: Without dead ends: 496 [2022-01-31 17:42:48,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7020 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=21420, Invalid=35462, Unknown=0, NotChecked=0, Total=56882 [2022-01-31 17:42:48,963 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 1945 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 2513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1945 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:42:48,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 55 Invalid, 2513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1945 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:42:48,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2022-01-31 17:42:48,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 496. [2022-01-31 17:42:48,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 490 states have (on average 1.010204081632653) internal successors, (495), 490 states have internal predecessors, (495), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:42:48,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 500 transitions. [2022-01-31 17:42:48,971 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 500 transitions. Word has length 487 [2022-01-31 17:42:48,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:42:48,972 INFO L470 AbstractCegarLoop]: Abstraction has 496 states and 500 transitions. [2022-01-31 17:42:48,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 1.115702479338843) internal successors, (135), 120 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:42:48,972 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 500 transitions. [2022-01-31 17:42:48,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2022-01-31 17:42:48,973 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:42:48,973 INFO L514 BasicCegarLoop]: trace histogram [118, 118, 118, 118, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:42:48,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2022-01-31 17:42:48,974 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:42:48,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:42:48,974 INFO L85 PathProgramCache]: Analyzing trace with hash 883816923, now seen corresponding path program 118 times [2022-01-31 17:42:48,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:42:48,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [543287689] [2022-01-31 17:42:48,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:42:48,974 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:42:48,975 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:42:48,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:42:49,002 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:42:49,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:42:53,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:42:53,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:42:53,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:42:53,125 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:42:53,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [543287689] [2022-01-31 17:42:53,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [543287689] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:42:53,126 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:42:53,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [122] imperfect sequences [] total 122 [2022-01-31 17:42:53,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110429386] [2022-01-31 17:42:53,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:42:53,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2022-01-31 17:42:53,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:42:53,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2022-01-31 17:42:53,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7262, Invalid=7500, Unknown=0, NotChecked=0, Total=14762 [2022-01-31 17:42:53,128 INFO L87 Difference]: Start difference. First operand 496 states and 500 transitions. Second operand has 122 states, 122 states have (on average 1.1147540983606556) internal successors, (136), 121 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:42:59,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:42:59,725 INFO L93 Difference]: Finished difference Result 871 states and 882 transitions. [2022-01-31 17:42:59,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-01-31 17:42:59,725 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 1.1147540983606556) internal successors, (136), 121 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 491 [2022-01-31 17:42:59,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:42:59,726 INFO L225 Difference]: With dead ends: 871 [2022-01-31 17:42:59,726 INFO L226 Difference]: Without dead ends: 500 [2022-01-31 17:42:59,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7139 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=21780, Invalid=36060, Unknown=0, NotChecked=0, Total=57840 [2022-01-31 17:42:59,728 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 1929 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 2501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1929 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:42:59,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 55 Invalid, 2501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1929 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:42:59,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2022-01-31 17:42:59,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 500. [2022-01-31 17:42:59,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 494 states have (on average 1.0101214574898785) internal successors, (499), 494 states have internal predecessors, (499), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:42:59,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 504 transitions. [2022-01-31 17:42:59,736 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 504 transitions. Word has length 491 [2022-01-31 17:42:59,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:42:59,736 INFO L470 AbstractCegarLoop]: Abstraction has 500 states and 504 transitions. [2022-01-31 17:42:59,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 1.1147540983606556) internal successors, (136), 121 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:42:59,736 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 504 transitions. [2022-01-31 17:42:59,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2022-01-31 17:42:59,738 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:42:59,738 INFO L514 BasicCegarLoop]: trace histogram [119, 119, 119, 119, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:42:59,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2022-01-31 17:42:59,738 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:42:59,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:42:59,738 INFO L85 PathProgramCache]: Analyzing trace with hash -318892007, now seen corresponding path program 119 times [2022-01-31 17:42:59,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:42:59,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [20503612] [2022-01-31 17:42:59,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:42:59,739 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:42:59,739 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:42:59,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:42:59,768 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:42:59,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:43:03,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:43:03,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:43:03,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:43:03,986 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:43:03,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [20503612] [2022-01-31 17:43:03,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [20503612] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:43:03,986 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:43:03,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [123] imperfect sequences [] total 123 [2022-01-31 17:43:03,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314736083] [2022-01-31 17:43:03,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:43:03,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-01-31 17:43:03,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:43:03,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-01-31 17:43:03,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7383, Invalid=7623, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 17:43:03,989 INFO L87 Difference]: Start difference. First operand 500 states and 504 transitions. Second operand has 123 states, 123 states have (on average 1.113821138211382) internal successors, (137), 122 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:43:10,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:43:10,739 INFO L93 Difference]: Finished difference Result 878 states and 889 transitions. [2022-01-31 17:43:10,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-01-31 17:43:10,739 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.113821138211382) internal successors, (137), 122 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 495 [2022-01-31 17:43:10,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:43:10,740 INFO L225 Difference]: With dead ends: 878 [2022-01-31 17:43:10,740 INFO L226 Difference]: Without dead ends: 504 [2022-01-31 17:43:10,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7259 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=22143, Invalid=36663, Unknown=0, NotChecked=0, Total=58806 [2022-01-31 17:43:10,742 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 2377 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 2923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2377 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:43:10,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 45 Invalid, 2923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2377 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:43:10,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2022-01-31 17:43:10,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 504. [2022-01-31 17:43:10,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 498 states have (on average 1.0100401606425702) internal successors, (503), 498 states have internal predecessors, (503), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:43:10,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 508 transitions. [2022-01-31 17:43:10,750 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 508 transitions. Word has length 495 [2022-01-31 17:43:10,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:43:10,750 INFO L470 AbstractCegarLoop]: Abstraction has 504 states and 508 transitions. [2022-01-31 17:43:10,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.113821138211382) internal successors, (137), 122 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:43:10,751 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 508 transitions. [2022-01-31 17:43:10,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2022-01-31 17:43:10,752 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:43:10,752 INFO L514 BasicCegarLoop]: trace histogram [120, 120, 120, 120, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:43:10,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2022-01-31 17:43:10,753 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:43:10,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:43:10,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1223921691, now seen corresponding path program 120 times [2022-01-31 17:43:10,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:43:10,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1770697231] [2022-01-31 17:43:10,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:43:10,753 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:43:10,754 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:43:10,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:43:10,782 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:43:10,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:43:15,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:43:15,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:43:15,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:43:15,048 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:43:15,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1770697231] [2022-01-31 17:43:15,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1770697231] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:43:15,048 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:43:15,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [124] imperfect sequences [] total 124 [2022-01-31 17:43:15,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036168818] [2022-01-31 17:43:15,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:43:15,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2022-01-31 17:43:15,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:43:15,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2022-01-31 17:43:15,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7505, Invalid=7747, Unknown=0, NotChecked=0, Total=15252 [2022-01-31 17:43:15,052 INFO L87 Difference]: Start difference. First operand 504 states and 508 transitions. Second operand has 124 states, 124 states have (on average 1.1129032258064515) internal successors, (138), 123 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:43:22,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:43:22,027 INFO L93 Difference]: Finished difference Result 885 states and 896 transitions. [2022-01-31 17:43:22,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-01-31 17:43:22,028 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 1.1129032258064515) internal successors, (138), 123 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 499 [2022-01-31 17:43:22,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:43:22,028 INFO L225 Difference]: With dead ends: 885 [2022-01-31 17:43:22,028 INFO L226 Difference]: Without dead ends: 508 [2022-01-31 17:43:22,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7380 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=22509, Invalid=37271, Unknown=0, NotChecked=0, Total=59780 [2022-01-31 17:43:22,031 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 1792 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 2402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1792 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:43:22,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 65 Invalid, 2402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1792 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:43:22,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2022-01-31 17:43:22,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 508. [2022-01-31 17:43:22,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 502 states have (on average 1.0099601593625498) internal successors, (507), 502 states have internal predecessors, (507), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:43:22,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 512 transitions. [2022-01-31 17:43:22,039 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 512 transitions. Word has length 499 [2022-01-31 17:43:22,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:43:22,040 INFO L470 AbstractCegarLoop]: Abstraction has 508 states and 512 transitions. [2022-01-31 17:43:22,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 1.1129032258064515) internal successors, (138), 123 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:43:22,040 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 512 transitions. [2022-01-31 17:43:22,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 504 [2022-01-31 17:43:22,042 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:43:22,042 INFO L514 BasicCegarLoop]: trace histogram [121, 121, 121, 121, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:43:22,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2022-01-31 17:43:22,042 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:43:22,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:43:22,042 INFO L85 PathProgramCache]: Analyzing trace with hash -359430311, now seen corresponding path program 121 times [2022-01-31 17:43:22,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:43:22,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1827616455] [2022-01-31 17:43:22,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:43:22,043 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:43:22,043 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:43:22,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:43:22,086 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:43:22,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:43:26,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:43:26,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:43:26,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:43:26,404 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:43:26,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1827616455] [2022-01-31 17:43:26,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1827616455] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:43:26,404 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:43:26,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [125] imperfect sequences [] total 125 [2022-01-31 17:43:26,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879447292] [2022-01-31 17:43:26,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:43:26,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2022-01-31 17:43:26,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:43:26,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2022-01-31 17:43:26,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7628, Invalid=7872, Unknown=0, NotChecked=0, Total=15500 [2022-01-31 17:43:26,407 INFO L87 Difference]: Start difference. First operand 508 states and 512 transitions. Second operand has 125 states, 125 states have (on average 1.112) internal successors, (139), 124 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:43:33,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:43:33,571 INFO L93 Difference]: Finished difference Result 892 states and 903 transitions. [2022-01-31 17:43:33,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-01-31 17:43:33,571 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 1.112) internal successors, (139), 124 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 503 [2022-01-31 17:43:33,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:43:33,572 INFO L225 Difference]: With dead ends: 892 [2022-01-31 17:43:33,572 INFO L226 Difference]: Without dead ends: 512 [2022-01-31 17:43:33,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7502 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=22878, Invalid=37884, Unknown=0, NotChecked=0, Total=60762 [2022-01-31 17:43:33,574 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 2086 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 2655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2086 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:43:33,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 50 Invalid, 2655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2086 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:43:33,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2022-01-31 17:43:33,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 512. [2022-01-31 17:43:33,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 506 states have (on average 1.0098814229249011) internal successors, (511), 506 states have internal predecessors, (511), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:43:33,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 516 transitions. [2022-01-31 17:43:33,583 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 516 transitions. Word has length 503 [2022-01-31 17:43:33,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:43:33,583 INFO L470 AbstractCegarLoop]: Abstraction has 512 states and 516 transitions. [2022-01-31 17:43:33,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 1.112) internal successors, (139), 124 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:43:33,583 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 516 transitions. [2022-01-31 17:43:33,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2022-01-31 17:43:33,585 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:43:33,585 INFO L514 BasicCegarLoop]: trace histogram [122, 122, 122, 122, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:43:33,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2022-01-31 17:43:33,585 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:43:33,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:43:33,585 INFO L85 PathProgramCache]: Analyzing trace with hash 728602203, now seen corresponding path program 122 times [2022-01-31 17:43:33,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:43:33,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [695675275] [2022-01-31 17:43:33,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:43:33,586 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:43:33,586 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:43:33,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:43:33,614 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:43:33,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:43:38,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:43:38,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:43:38,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:43:38,004 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:43:38,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [695675275] [2022-01-31 17:43:38,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [695675275] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:43:38,004 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:43:38,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [126] imperfect sequences [] total 126 [2022-01-31 17:43:38,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453820825] [2022-01-31 17:43:38,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:43:38,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2022-01-31 17:43:38,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:43:38,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2022-01-31 17:43:38,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7752, Invalid=7998, Unknown=0, NotChecked=0, Total=15750 [2022-01-31 17:43:38,008 INFO L87 Difference]: Start difference. First operand 512 states and 516 transitions. Second operand has 126 states, 126 states have (on average 1.1111111111111112) internal successors, (140), 125 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:43:45,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:43:45,330 INFO L93 Difference]: Finished difference Result 899 states and 910 transitions. [2022-01-31 17:43:45,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-01-31 17:43:45,330 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 1.1111111111111112) internal successors, (140), 125 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 507 [2022-01-31 17:43:45,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:43:45,331 INFO L225 Difference]: With dead ends: 899 [2022-01-31 17:43:45,331 INFO L226 Difference]: Without dead ends: 516 [2022-01-31 17:43:45,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7625 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=23250, Invalid=38502, Unknown=0, NotChecked=0, Total=61752 [2022-01-31 17:43:45,333 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 1946 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 2594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1946 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:43:45,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 75 Invalid, 2594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1946 Valid, 648 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:43:45,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2022-01-31 17:43:45,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 516. [2022-01-31 17:43:45,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 510 states have (on average 1.0098039215686274) internal successors, (515), 510 states have internal predecessors, (515), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:43:45,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 520 transitions. [2022-01-31 17:43:45,342 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 520 transitions. Word has length 507 [2022-01-31 17:43:45,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:43:45,342 INFO L470 AbstractCegarLoop]: Abstraction has 516 states and 520 transitions. [2022-01-31 17:43:45,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 1.1111111111111112) internal successors, (140), 125 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:43:45,342 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 520 transitions. [2022-01-31 17:43:45,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2022-01-31 17:43:45,344 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:43:45,344 INFO L514 BasicCegarLoop]: trace histogram [123, 123, 123, 123, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:43:45,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2022-01-31 17:43:45,344 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:43:45,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:43:45,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1363068569, now seen corresponding path program 123 times [2022-01-31 17:43:45,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:43:45,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1679688841] [2022-01-31 17:43:45,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:43:45,345 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:43:45,345 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:43:45,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:43:45,374 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:43:45,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:43:49,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:43:49,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:43:49,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:43:49,817 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:43:49,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1679688841] [2022-01-31 17:43:49,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1679688841] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:43:49,818 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:43:49,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [127] imperfect sequences [] total 127 [2022-01-31 17:43:49,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848823328] [2022-01-31 17:43:49,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:43:49,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2022-01-31 17:43:49,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:43:49,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2022-01-31 17:43:49,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7877, Invalid=8125, Unknown=0, NotChecked=0, Total=16002 [2022-01-31 17:43:49,821 INFO L87 Difference]: Start difference. First operand 516 states and 520 transitions. Second operand has 127 states, 127 states have (on average 1.110236220472441) internal successors, (141), 126 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:43:57,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:43:57,498 INFO L93 Difference]: Finished difference Result 906 states and 917 transitions. [2022-01-31 17:43:57,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-01-31 17:43:57,498 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 1.110236220472441) internal successors, (141), 126 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 511 [2022-01-31 17:43:57,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:43:57,499 INFO L225 Difference]: With dead ends: 906 [2022-01-31 17:43:57,499 INFO L226 Difference]: Without dead ends: 520 [2022-01-31 17:43:57,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 249 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7749 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=23625, Invalid=39125, Unknown=0, NotChecked=0, Total=62750 [2022-01-31 17:43:57,501 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 1981 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 2573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1981 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:43:57,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 55 Invalid, 2573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1981 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:43:57,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2022-01-31 17:43:57,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 520. [2022-01-31 17:43:57,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 514 states have (on average 1.009727626459144) internal successors, (519), 514 states have internal predecessors, (519), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:43:57,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 524 transitions. [2022-01-31 17:43:57,510 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 524 transitions. Word has length 511 [2022-01-31 17:43:57,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:43:57,510 INFO L470 AbstractCegarLoop]: Abstraction has 520 states and 524 transitions. [2022-01-31 17:43:57,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 127 states have (on average 1.110236220472441) internal successors, (141), 126 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:43:57,510 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 524 transitions. [2022-01-31 17:43:57,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 516 [2022-01-31 17:43:57,512 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:43:57,512 INFO L514 BasicCegarLoop]: trace histogram [124, 124, 124, 124, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:43:57,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2022-01-31 17:43:57,512 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:43:57,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:43:57,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1632898203, now seen corresponding path program 124 times [2022-01-31 17:43:57,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:43:57,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [180127092] [2022-01-31 17:43:57,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:43:57,513 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:43:57,513 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:43:57,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:43:57,546 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:43:57,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:02,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:02,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:02,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:02,112 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:02,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [180127092] [2022-01-31 17:44:02,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [180127092] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:02,112 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:02,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [128] imperfect sequences [] total 128 [2022-01-31 17:44:02,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678854889] [2022-01-31 17:44:02,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:02,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-01-31 17:44:02,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:02,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-01-31 17:44:02,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8003, Invalid=8253, Unknown=0, NotChecked=0, Total=16256 [2022-01-31 17:44:02,116 INFO L87 Difference]: Start difference. First operand 520 states and 524 transitions. Second operand has 128 states, 128 states have (on average 1.109375) internal successors, (142), 127 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:09,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:09,993 INFO L93 Difference]: Finished difference Result 913 states and 924 transitions. [2022-01-31 17:44:09,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-01-31 17:44:09,993 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 1.109375) internal successors, (142), 127 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 515 [2022-01-31 17:44:09,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:09,994 INFO L225 Difference]: With dead ends: 913 [2022-01-31 17:44:09,994 INFO L226 Difference]: Without dead ends: 524 [2022-01-31 17:44:09,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7874 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=24003, Invalid=39753, Unknown=0, NotChecked=0, Total=63756 [2022-01-31 17:44:09,996 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 2227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 2808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2227 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:09,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 50 Invalid, 2808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2227 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:44:09,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2022-01-31 17:44:10,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 524. [2022-01-31 17:44:10,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 518 states have (on average 1.0096525096525097) internal successors, (523), 518 states have internal predecessors, (523), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:10,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 528 transitions. [2022-01-31 17:44:10,004 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 528 transitions. Word has length 515 [2022-01-31 17:44:10,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:10,005 INFO L470 AbstractCegarLoop]: Abstraction has 524 states and 528 transitions. [2022-01-31 17:44:10,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 1.109375) internal successors, (142), 127 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:10,005 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 528 transitions. [2022-01-31 17:44:10,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 520 [2022-01-31 17:44:10,007 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:10,007 INFO L514 BasicCegarLoop]: trace histogram [125, 125, 125, 125, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:10,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2022-01-31 17:44:10,007 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:10,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:10,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1026020825, now seen corresponding path program 125 times [2022-01-31 17:44:10,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:10,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2024618147] [2022-01-31 17:44:10,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:10,008 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:10,008 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:10,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:10,041 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:10,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:14,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:14,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:14,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:14,746 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:14,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2024618147] [2022-01-31 17:44:14,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2024618147] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:14,746 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:14,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [129] imperfect sequences [] total 129 [2022-01-31 17:44:14,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695006539] [2022-01-31 17:44:14,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:14,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2022-01-31 17:44:14,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:14,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2022-01-31 17:44:14,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8130, Invalid=8382, Unknown=0, NotChecked=0, Total=16512 [2022-01-31 17:44:14,751 INFO L87 Difference]: Start difference. First operand 524 states and 528 transitions. Second operand has 129 states, 129 states have (on average 1.1085271317829457) internal successors, (143), 128 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:22,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:22,778 INFO L93 Difference]: Finished difference Result 920 states and 931 transitions. [2022-01-31 17:44:22,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-01-31 17:44:22,779 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 1.1085271317829457) internal successors, (143), 128 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 519 [2022-01-31 17:44:22,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:22,780 INFO L225 Difference]: With dead ends: 920 [2022-01-31 17:44:22,780 INFO L226 Difference]: Without dead ends: 528 [2022-01-31 17:44:22,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8000 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=24384, Invalid=40386, Unknown=0, NotChecked=0, Total=64770 [2022-01-31 17:44:22,782 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 2004 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 2619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2004 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:22,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 60 Invalid, 2619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2004 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:44:22,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2022-01-31 17:44:22,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 528. [2022-01-31 17:44:22,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 522 states have (on average 1.0095785440613028) internal successors, (527), 522 states have internal predecessors, (527), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:22,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 532 transitions. [2022-01-31 17:44:22,791 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 532 transitions. Word has length 519 [2022-01-31 17:44:22,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:22,791 INFO L470 AbstractCegarLoop]: Abstraction has 528 states and 532 transitions. [2022-01-31 17:44:22,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 1.1085271317829457) internal successors, (143), 128 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:22,791 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 532 transitions. [2022-01-31 17:44:22,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 524 [2022-01-31 17:44:22,793 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:22,793 INFO L514 BasicCegarLoop]: trace histogram [126, 126, 126, 126, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:22,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2022-01-31 17:44:22,793 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:22,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:22,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1864437029, now seen corresponding path program 126 times [2022-01-31 17:44:22,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:22,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2056239463] [2022-01-31 17:44:22,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:22,795 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:22,795 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:22,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:22,828 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:23,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:27,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:27,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:27,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:27,592 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:27,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2056239463] [2022-01-31 17:44:27,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2056239463] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:27,593 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:27,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [130] imperfect sequences [] total 130 [2022-01-31 17:44:27,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590162817] [2022-01-31 17:44:27,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:27,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-01-31 17:44:27,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:27,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-01-31 17:44:27,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8258, Invalid=8512, Unknown=0, NotChecked=0, Total=16770 [2022-01-31 17:44:27,595 INFO L87 Difference]: Start difference. First operand 528 states and 532 transitions. Second operand has 130 states, 130 states have (on average 1.1076923076923078) internal successors, (144), 129 states have internal predecessors, (144), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:35,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:35,708 INFO L93 Difference]: Finished difference Result 927 states and 938 transitions. [2022-01-31 17:44:35,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-01-31 17:44:35,709 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 130 states have (on average 1.1076923076923078) internal successors, (144), 129 states have internal predecessors, (144), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 523 [2022-01-31 17:44:35,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:35,709 INFO L225 Difference]: With dead ends: 927 [2022-01-31 17:44:35,709 INFO L226 Difference]: Without dead ends: 532 [2022-01-31 17:44:35,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8127 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=24768, Invalid=41024, Unknown=0, NotChecked=0, Total=65792 [2022-01-31 17:44:35,712 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 2413 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 3017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2413 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:35,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 55 Invalid, 3017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2413 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:44:35,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2022-01-31 17:44:35,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 532. [2022-01-31 17:44:35,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 526 states have (on average 1.0095057034220531) internal successors, (531), 526 states have internal predecessors, (531), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:35,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 536 transitions. [2022-01-31 17:44:35,720 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 536 transitions. Word has length 523 [2022-01-31 17:44:35,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:35,720 INFO L470 AbstractCegarLoop]: Abstraction has 532 states and 536 transitions. [2022-01-31 17:44:35,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 1.1076923076923078) internal successors, (144), 129 states have internal predecessors, (144), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:35,721 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 536 transitions. [2022-01-31 17:44:35,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2022-01-31 17:44:35,722 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:35,723 INFO L514 BasicCegarLoop]: trace histogram [127, 127, 127, 127, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:35,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2022-01-31 17:44:35,723 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:35,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:35,723 INFO L85 PathProgramCache]: Analyzing trace with hash -109660903, now seen corresponding path program 127 times [2022-01-31 17:44:35,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:35,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1550219977] [2022-01-31 17:44:35,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:35,724 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:35,724 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:35,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:35,755 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:35,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:40,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:40,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:40,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:40,592 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:40,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1550219977] [2022-01-31 17:44:40,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1550219977] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:40,592 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:40,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [131] imperfect sequences [] total 131 [2022-01-31 17:44:40,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698247516] [2022-01-31 17:44:40,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:40,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2022-01-31 17:44:40,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:40,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2022-01-31 17:44:40,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8387, Invalid=8643, Unknown=0, NotChecked=0, Total=17030 [2022-01-31 17:44:40,596 INFO L87 Difference]: Start difference. First operand 532 states and 536 transitions. Second operand has 131 states, 131 states have (on average 1.1068702290076335) internal successors, (145), 130 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:48,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:48,898 INFO L93 Difference]: Finished difference Result 934 states and 945 transitions. [2022-01-31 17:44:48,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-01-31 17:44:48,899 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 1.1068702290076335) internal successors, (145), 130 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 527 [2022-01-31 17:44:48,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:48,899 INFO L225 Difference]: With dead ends: 934 [2022-01-31 17:44:48,899 INFO L226 Difference]: Without dead ends: 536 [2022-01-31 17:44:48,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8255 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=25155, Invalid=41667, Unknown=0, NotChecked=0, Total=66822 [2022-01-31 17:44:48,902 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 2608 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 3186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2608 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:48,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 45 Invalid, 3186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2608 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:44:48,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2022-01-31 17:44:48,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 536. [2022-01-31 17:44:48,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 530 states have (on average 1.009433962264151) internal successors, (535), 530 states have internal predecessors, (535), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:48,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 540 transitions. [2022-01-31 17:44:48,911 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 540 transitions. Word has length 527 [2022-01-31 17:44:48,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:48,911 INFO L470 AbstractCegarLoop]: Abstraction has 536 states and 540 transitions. [2022-01-31 17:44:48,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 1.1068702290076335) internal successors, (145), 130 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:48,911 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 540 transitions. [2022-01-31 17:44:48,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2022-01-31 17:44:48,913 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:48,913 INFO L514 BasicCegarLoop]: trace histogram [128, 128, 128, 128, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:48,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2022-01-31 17:44:48,913 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:48,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:48,913 INFO L85 PathProgramCache]: Analyzing trace with hash 21383451, now seen corresponding path program 128 times [2022-01-31 17:44:48,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:48,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1563880544] [2022-01-31 17:44:48,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:48,914 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:48,914 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:48,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:48,947 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:49,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:53,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:53,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:53,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:53,861 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:53,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1563880544] [2022-01-31 17:44:53,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1563880544] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:53,862 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:53,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [132] imperfect sequences [] total 132 [2022-01-31 17:44:53,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164929627] [2022-01-31 17:44:53,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:53,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2022-01-31 17:44:53,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:53,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2022-01-31 17:44:53,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8517, Invalid=8775, Unknown=0, NotChecked=0, Total=17292 [2022-01-31 17:44:53,864 INFO L87 Difference]: Start difference. First operand 536 states and 540 transitions. Second operand has 132 states, 132 states have (on average 1.106060606060606) internal successors, (146), 131 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:02,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:02,003 INFO L93 Difference]: Finished difference Result 941 states and 952 transitions. [2022-01-31 17:45:02,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-01-31 17:45:02,004 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 1.106060606060606) internal successors, (146), 131 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 531 [2022-01-31 17:45:02,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:02,005 INFO L225 Difference]: With dead ends: 941 [2022-01-31 17:45:02,005 INFO L226 Difference]: Without dead ends: 540 [2022-01-31 17:45:02,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 259 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8384 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=25545, Invalid=42315, Unknown=0, NotChecked=0, Total=67860 [2022-01-31 17:45:02,007 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 2282 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 2894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2282 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:02,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 55 Invalid, 2894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2282 Valid, 612 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:45:02,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2022-01-31 17:45:02,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 540. [2022-01-31 17:45:02,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 534 states have (on average 1.0093632958801497) internal successors, (539), 534 states have internal predecessors, (539), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:02,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 544 transitions. [2022-01-31 17:45:02,017 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 544 transitions. Word has length 531 [2022-01-31 17:45:02,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:02,017 INFO L470 AbstractCegarLoop]: Abstraction has 540 states and 544 transitions. [2022-01-31 17:45:02,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 132 states have (on average 1.106060606060606) internal successors, (146), 131 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:02,017 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 544 transitions. [2022-01-31 17:45:02,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 536 [2022-01-31 17:45:02,020 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:02,020 INFO L514 BasicCegarLoop]: trace histogram [129, 129, 129, 129, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:02,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2022-01-31 17:45:02,020 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:02,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:02,020 INFO L85 PathProgramCache]: Analyzing trace with hash -2142018471, now seen corresponding path program 129 times [2022-01-31 17:45:02,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:02,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1856152298] [2022-01-31 17:45:02,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:02,021 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:02,021 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:02,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:02,058 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:02,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:07,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:07,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:07,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:07,096 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:07,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1856152298] [2022-01-31 17:45:07,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1856152298] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:07,096 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:07,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [133] imperfect sequences [] total 133 [2022-01-31 17:45:07,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247291817] [2022-01-31 17:45:07,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:07,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2022-01-31 17:45:07,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:07,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2022-01-31 17:45:07,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8648, Invalid=8908, Unknown=0, NotChecked=0, Total=17556 [2022-01-31 17:45:07,099 INFO L87 Difference]: Start difference. First operand 540 states and 544 transitions. Second operand has 133 states, 133 states have (on average 1.105263157894737) internal successors, (147), 132 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:15,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:15,470 INFO L93 Difference]: Finished difference Result 948 states and 959 transitions. [2022-01-31 17:45:15,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-01-31 17:45:15,471 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 133 states have (on average 1.105263157894737) internal successors, (147), 132 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 535 [2022-01-31 17:45:15,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:15,471 INFO L225 Difference]: With dead ends: 948 [2022-01-31 17:45:15,471 INFO L226 Difference]: Without dead ends: 544 [2022-01-31 17:45:15,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 261 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8514 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=25938, Invalid=42968, Unknown=0, NotChecked=0, Total=68906 [2022-01-31 17:45:15,474 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 2083 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 2714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2083 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:15,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 60 Invalid, 2714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2083 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:45:15,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2022-01-31 17:45:15,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 544. [2022-01-31 17:45:15,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 538 states have (on average 1.0092936802973977) internal successors, (543), 538 states have internal predecessors, (543), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:15,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 548 transitions. [2022-01-31 17:45:15,483 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 548 transitions. Word has length 535 [2022-01-31 17:45:15,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:15,483 INFO L470 AbstractCegarLoop]: Abstraction has 544 states and 548 transitions. [2022-01-31 17:45:15,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 133 states, 133 states have (on average 1.105263157894737) internal successors, (147), 132 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:15,483 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 548 transitions. [2022-01-31 17:45:15,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 540 [2022-01-31 17:45:15,485 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:15,485 INFO L514 BasicCegarLoop]: trace histogram [130, 130, 130, 130, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:15,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2022-01-31 17:45:15,485 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:15,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:15,485 INFO L85 PathProgramCache]: Analyzing trace with hash 448925531, now seen corresponding path program 130 times [2022-01-31 17:45:15,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:15,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1810403863] [2022-01-31 17:45:15,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:15,486 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:15,486 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:15,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:15,518 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:15,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:20,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:20,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:20,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:20,620 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:20,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1810403863] [2022-01-31 17:45:20,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1810403863] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:20,621 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:20,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [134] imperfect sequences [] total 134 [2022-01-31 17:45:20,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090880848] [2022-01-31 17:45:20,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:20,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2022-01-31 17:45:20,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:20,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2022-01-31 17:45:20,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8780, Invalid=9042, Unknown=0, NotChecked=0, Total=17822 [2022-01-31 17:45:20,623 INFO L87 Difference]: Start difference. First operand 544 states and 548 transitions. Second operand has 134 states, 134 states have (on average 1.1044776119402986) internal successors, (148), 133 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:29,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:29,824 INFO L93 Difference]: Finished difference Result 955 states and 966 transitions. [2022-01-31 17:45:29,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2022-01-31 17:45:29,825 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 1.1044776119402986) internal successors, (148), 133 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 539 [2022-01-31 17:45:29,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:29,825 INFO L225 Difference]: With dead ends: 955 [2022-01-31 17:45:29,825 INFO L226 Difference]: Without dead ends: 548 [2022-01-31 17:45:29,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8645 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=26334, Invalid=43626, Unknown=0, NotChecked=0, Total=69960 [2022-01-31 17:45:29,828 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 2533 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 3108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2533 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:29,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 40 Invalid, 3108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2533 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:45:29,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2022-01-31 17:45:29,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 548. [2022-01-31 17:45:29,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 542 states have (on average 1.0092250922509225) internal successors, (547), 542 states have internal predecessors, (547), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:29,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 552 transitions. [2022-01-31 17:45:29,837 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 552 transitions. Word has length 539 [2022-01-31 17:45:29,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:29,837 INFO L470 AbstractCegarLoop]: Abstraction has 548 states and 552 transitions. [2022-01-31 17:45:29,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 1.1044776119402986) internal successors, (148), 133 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:29,837 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 552 transitions. [2022-01-31 17:45:29,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 544 [2022-01-31 17:45:29,839 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:29,839 INFO L514 BasicCegarLoop]: trace histogram [131, 131, 131, 131, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:29,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2022-01-31 17:45:29,839 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:29,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:29,839 INFO L85 PathProgramCache]: Analyzing trace with hash -85597287, now seen corresponding path program 131 times [2022-01-31 17:45:29,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:29,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [745583860] [2022-01-31 17:45:29,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:29,840 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:29,840 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:29,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:29,874 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:30,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:35,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:35,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:35,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:35,049 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:35,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [745583860] [2022-01-31 17:45:35,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [745583860] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:35,050 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:35,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [135] imperfect sequences [] total 135 [2022-01-31 17:45:35,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218995033] [2022-01-31 17:45:35,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:35,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2022-01-31 17:45:35,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:35,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2022-01-31 17:45:35,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8913, Invalid=9177, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 17:45:35,054 INFO L87 Difference]: Start difference. First operand 548 states and 552 transitions. Second operand has 135 states, 135 states have (on average 1.1037037037037036) internal successors, (149), 134 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:44,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:44,156 INFO L93 Difference]: Finished difference Result 962 states and 973 transitions. [2022-01-31 17:45:44,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2022-01-31 17:45:44,156 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 1.1037037037037036) internal successors, (149), 134 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 543 [2022-01-31 17:45:44,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:44,157 INFO L225 Difference]: With dead ends: 962 [2022-01-31 17:45:44,157 INFO L226 Difference]: Without dead ends: 552 [2022-01-31 17:45:44,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 265 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8777 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=26733, Invalid=44289, Unknown=0, NotChecked=0, Total=71022 [2022-01-31 17:45:44,160 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 2230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 2884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2230 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:44,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 65 Invalid, 2884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2230 Valid, 654 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:45:44,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2022-01-31 17:45:44,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 552. [2022-01-31 17:45:44,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 546 states have (on average 1.0091575091575091) internal successors, (551), 546 states have internal predecessors, (551), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:44,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 556 transitions. [2022-01-31 17:45:44,169 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 556 transitions. Word has length 543 [2022-01-31 17:45:44,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:44,169 INFO L470 AbstractCegarLoop]: Abstraction has 552 states and 556 transitions. [2022-01-31 17:45:44,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 1.1037037037037036) internal successors, (149), 134 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:44,169 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 556 transitions. [2022-01-31 17:45:44,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 548 [2022-01-31 17:45:44,171 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:44,171 INFO L514 BasicCegarLoop]: trace histogram [132, 132, 132, 132, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:44,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2022-01-31 17:45:44,171 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:44,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:44,172 INFO L85 PathProgramCache]: Analyzing trace with hash -427145829, now seen corresponding path program 132 times [2022-01-31 17:45:44,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:44,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [614949658] [2022-01-31 17:45:44,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:44,172 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:44,172 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:44,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:44,210 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:44,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:49,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:49,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:49,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:49,389 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:49,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [614949658] [2022-01-31 17:45:49,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [614949658] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:49,389 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:49,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [136] imperfect sequences [] total 136 [2022-01-31 17:45:49,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66127307] [2022-01-31 17:45:49,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:49,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 136 states [2022-01-31 17:45:49,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:49,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2022-01-31 17:45:49,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9047, Invalid=9313, Unknown=0, NotChecked=0, Total=18360 [2022-01-31 17:45:49,393 INFO L87 Difference]: Start difference. First operand 552 states and 556 transitions. Second operand has 136 states, 136 states have (on average 1.1029411764705883) internal successors, (150), 135 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:58,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:58,370 INFO L93 Difference]: Finished difference Result 969 states and 980 transitions. [2022-01-31 17:45:58,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2022-01-31 17:45:58,370 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 136 states have (on average 1.1029411764705883) internal successors, (150), 135 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 547 [2022-01-31 17:45:58,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:58,371 INFO L225 Difference]: With dead ends: 969 [2022-01-31 17:45:58,371 INFO L226 Difference]: Without dead ends: 556 [2022-01-31 17:45:58,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 267 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8910 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=27135, Invalid=44957, Unknown=0, NotChecked=0, Total=72092 [2022-01-31 17:45:58,373 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 1925 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 2568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1925 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:58,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 60 Invalid, 2568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1925 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:45:58,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2022-01-31 17:45:58,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 556. [2022-01-31 17:45:58,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 550 states have (on average 1.009090909090909) internal successors, (555), 550 states have internal predecessors, (555), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:58,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 560 transitions. [2022-01-31 17:45:58,383 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 560 transitions. Word has length 547 [2022-01-31 17:45:58,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:58,383 INFO L470 AbstractCegarLoop]: Abstraction has 556 states and 560 transitions. [2022-01-31 17:45:58,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 136 states, 136 states have (on average 1.1029411764705883) internal successors, (150), 135 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:58,383 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 560 transitions. [2022-01-31 17:45:58,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 552 [2022-01-31 17:45:58,385 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:58,385 INFO L514 BasicCegarLoop]: trace histogram [133, 133, 133, 133, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:58,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2022-01-31 17:45:58,385 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:58,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:58,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1096168153, now seen corresponding path program 133 times [2022-01-31 17:45:58,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:58,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1451594617] [2022-01-31 17:45:58,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:58,386 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:58,386 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:58,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:58,420 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:58,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:03,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:46:03,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:03,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:46:03,779 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:46:03,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1451594617] [2022-01-31 17:46:03,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1451594617] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:46:03,779 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:46:03,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [137] imperfect sequences [] total 137 [2022-01-31 17:46:03,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515090918] [2022-01-31 17:46:03,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:46:03,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2022-01-31 17:46:03,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:46:03,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2022-01-31 17:46:03,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9182, Invalid=9450, Unknown=0, NotChecked=0, Total=18632 [2022-01-31 17:46:03,784 INFO L87 Difference]: Start difference. First operand 556 states and 560 transitions. Second operand has 137 states, 137 states have (on average 1.102189781021898) internal successors, (151), 136 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:12,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:46:12,926 INFO L93 Difference]: Finished difference Result 976 states and 987 transitions. [2022-01-31 17:46:12,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-01-31 17:46:12,926 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 137 states have (on average 1.102189781021898) internal successors, (151), 136 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 551 [2022-01-31 17:46:12,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:46:12,927 INFO L225 Difference]: With dead ends: 976 [2022-01-31 17:46:12,927 INFO L226 Difference]: Without dead ends: 560 [2022-01-31 17:46:12,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9044 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=27540, Invalid=45630, Unknown=0, NotChecked=0, Total=73170 [2022-01-31 17:46:12,929 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 2127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 2759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2127 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:46:12,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 55 Invalid, 2759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2127 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:46:12,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2022-01-31 17:46:12,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 560. [2022-01-31 17:46:12,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 554 states have (on average 1.0090252707581226) internal successors, (559), 554 states have internal predecessors, (559), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:46:12,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 564 transitions. [2022-01-31 17:46:12,939 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 564 transitions. Word has length 551 [2022-01-31 17:46:12,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:46:12,939 INFO L470 AbstractCegarLoop]: Abstraction has 560 states and 564 transitions. [2022-01-31 17:46:12,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 137 states, 137 states have (on average 1.102189781021898) internal successors, (151), 136 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:12,939 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 564 transitions. [2022-01-31 17:46:12,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 556 [2022-01-31 17:46:12,941 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:46:12,941 INFO L514 BasicCegarLoop]: trace histogram [134, 134, 134, 134, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:46:12,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2022-01-31 17:46:12,941 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:46:12,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:46:12,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1898517541, now seen corresponding path program 134 times [2022-01-31 17:46:12,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:46:12,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [636484112] [2022-01-31 17:46:12,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:46:12,942 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:46:12,942 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:46:12,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:46:12,984 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:46:13,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:18,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:46:18,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:18,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:46:18,309 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:46:18,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [636484112] [2022-01-31 17:46:18,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [636484112] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:46:18,309 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:46:18,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [138] imperfect sequences [] total 138 [2022-01-31 17:46:18,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163398555] [2022-01-31 17:46:18,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:46:18,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 138 states [2022-01-31 17:46:18,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:46:18,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2022-01-31 17:46:18,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9318, Invalid=9588, Unknown=0, NotChecked=0, Total=18906 [2022-01-31 17:46:18,314 INFO L87 Difference]: Start difference. First operand 560 states and 564 transitions. Second operand has 138 states, 138 states have (on average 1.1014492753623188) internal successors, (152), 137 states have internal predecessors, (152), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:27,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:46:27,608 INFO L93 Difference]: Finished difference Result 983 states and 994 transitions. [2022-01-31 17:46:27,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2022-01-31 17:46:27,608 INFO L78 Accepts]: Start accepts. Automaton has has 138 states, 138 states have (on average 1.1014492753623188) internal successors, (152), 137 states have internal predecessors, (152), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 555 [2022-01-31 17:46:27,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:46:27,609 INFO L225 Difference]: With dead ends: 983 [2022-01-31 17:46:27,609 INFO L226 Difference]: Without dead ends: 564 [2022-01-31 17:46:27,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 271 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9179 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=27948, Invalid=46308, Unknown=0, NotChecked=0, Total=74256 [2022-01-31 17:46:27,611 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 2530 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 3151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2530 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:46:27,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 50 Invalid, 3151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2530 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:46:27,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2022-01-31 17:46:27,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 564. [2022-01-31 17:46:27,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 558 states have (on average 1.0089605734767024) internal successors, (563), 558 states have internal predecessors, (563), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:46:27,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 568 transitions. [2022-01-31 17:46:27,620 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 568 transitions. Word has length 555 [2022-01-31 17:46:27,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:46:27,621 INFO L470 AbstractCegarLoop]: Abstraction has 564 states and 568 transitions. [2022-01-31 17:46:27,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 138 states, 138 states have (on average 1.1014492753623188) internal successors, (152), 137 states have internal predecessors, (152), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:27,621 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 568 transitions. [2022-01-31 17:46:27,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 560 [2022-01-31 17:46:27,623 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:46:27,623 INFO L514 BasicCegarLoop]: trace histogram [135, 135, 135, 135, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:46:27,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2022-01-31 17:46:27,623 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:46:27,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:46:27,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1523339801, now seen corresponding path program 135 times [2022-01-31 17:46:27,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:46:27,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [952238937] [2022-01-31 17:46:27,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:46:27,624 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:46:27,624 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:46:27,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:46:27,658 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:46:27,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:33,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:46:33,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:33,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:46:33,050 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:46:33,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [952238937] [2022-01-31 17:46:33,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [952238937] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:46:33,050 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:46:33,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [139] imperfect sequences [] total 139 [2022-01-31 17:46:33,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695414069] [2022-01-31 17:46:33,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:46:33,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 139 states [2022-01-31 17:46:33,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:46:33,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2022-01-31 17:46:33,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9455, Invalid=9727, Unknown=0, NotChecked=0, Total=19182 [2022-01-31 17:46:33,052 INFO L87 Difference]: Start difference. First operand 564 states and 568 transitions. Second operand has 139 states, 139 states have (on average 1.1007194244604317) internal successors, (153), 138 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:42,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:46:42,494 INFO L93 Difference]: Finished difference Result 990 states and 1001 transitions. [2022-01-31 17:46:42,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2022-01-31 17:46:42,494 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 139 states have (on average 1.1007194244604317) internal successors, (153), 138 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 559 [2022-01-31 17:46:42,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:46:42,495 INFO L225 Difference]: With dead ends: 990 [2022-01-31 17:46:42,495 INFO L226 Difference]: Without dead ends: 568 [2022-01-31 17:46:42,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 273 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9315 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=28359, Invalid=46991, Unknown=0, NotChecked=0, Total=75350 [2022-01-31 17:46:42,497 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 670 mSolverCounterSat, 2522 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 3192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2522 IncrementalHoareTripleChecker+Valid, 670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:46:42,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 65 Invalid, 3192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2522 Valid, 670 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:46:42,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2022-01-31 17:46:42,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 568. [2022-01-31 17:46:42,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 562 states have (on average 1.008896797153025) internal successors, (567), 562 states have internal predecessors, (567), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:46:42,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 572 transitions. [2022-01-31 17:46:42,506 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 572 transitions. Word has length 559 [2022-01-31 17:46:42,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:46:42,507 INFO L470 AbstractCegarLoop]: Abstraction has 568 states and 572 transitions. [2022-01-31 17:46:42,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 139 states, 139 states have (on average 1.1007194244604317) internal successors, (153), 138 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:42,507 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 572 transitions. [2022-01-31 17:46:42,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 564 [2022-01-31 17:46:42,509 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:46:42,509 INFO L514 BasicCegarLoop]: trace histogram [136, 136, 136, 136, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:46:42,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2022-01-31 17:46:42,509 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:46:42,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:46:42,509 INFO L85 PathProgramCache]: Analyzing trace with hash -555744741, now seen corresponding path program 136 times [2022-01-31 17:46:42,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:46:42,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [892637932] [2022-01-31 17:46:42,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:46:42,510 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:46:42,510 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:46:42,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:46:42,553 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:46:42,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:47,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:46:47,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:47,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:46:47,977 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:46:47,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [892637932] [2022-01-31 17:46:47,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [892637932] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:46:47,977 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:46:47,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [140] imperfect sequences [] total 140 [2022-01-31 17:46:47,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112482768] [2022-01-31 17:46:47,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:46:47,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2022-01-31 17:46:47,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:46:47,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2022-01-31 17:46:47,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9593, Invalid=9867, Unknown=0, NotChecked=0, Total=19460 [2022-01-31 17:46:47,981 INFO L87 Difference]: Start difference. First operand 568 states and 572 transitions. Second operand has 140 states, 140 states have (on average 1.1) internal successors, (154), 139 states have internal predecessors, (154), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:57,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:46:57,355 INFO L93 Difference]: Finished difference Result 997 states and 1008 transitions. [2022-01-31 17:46:57,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2022-01-31 17:46:57,356 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 1.1) internal successors, (154), 139 states have internal predecessors, (154), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 563 [2022-01-31 17:46:57,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:46:57,356 INFO L225 Difference]: With dead ends: 997 [2022-01-31 17:46:57,356 INFO L226 Difference]: Without dead ends: 572 [2022-01-31 17:46:57,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9452 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=28773, Invalid=47679, Unknown=0, NotChecked=0, Total=76452 [2022-01-31 17:46:57,359 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 2210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 2869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2210 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:46:57,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 60 Invalid, 2869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2210 Valid, 659 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:46:57,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2022-01-31 17:46:57,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 572. [2022-01-31 17:46:57,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 566 states have (on average 1.0088339222614842) internal successors, (571), 566 states have internal predecessors, (571), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:46:57,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 576 transitions. [2022-01-31 17:46:57,369 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 576 transitions. Word has length 563 [2022-01-31 17:46:57,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:46:57,369 INFO L470 AbstractCegarLoop]: Abstraction has 572 states and 576 transitions. [2022-01-31 17:46:57,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 140 states have (on average 1.1) internal successors, (154), 139 states have internal predecessors, (154), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:57,369 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 576 transitions. [2022-01-31 17:46:57,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 568 [2022-01-31 17:46:57,372 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:46:57,372 INFO L514 BasicCegarLoop]: trace histogram [137, 137, 137, 137, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:46:57,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2022-01-31 17:46:57,372 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:46:57,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:46:57,372 INFO L85 PathProgramCache]: Analyzing trace with hash -42974887, now seen corresponding path program 137 times [2022-01-31 17:46:57,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:46:57,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1670491612] [2022-01-31 17:46:57,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:46:57,373 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:46:57,373 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:46:57,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:46:57,416 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:46:57,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat