/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/sorting_selectionsort_2_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 17:01:10,463 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 17:01:10,465 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 17:01:10,534 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 17:01:10,550 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 17:01:10,551 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 17:01:10,552 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 17:01:10,552 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 17:01:10,553 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 17:01:10,553 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 17:01:10,554 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 17:01:10,555 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 17:01:10,556 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 17:01:10,558 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 17:01:10,562 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 17:01:10,563 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 17:01:10,569 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 17:01:10,576 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 17:01:10,576 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 17:01:10,577 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 17:01:10,578 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 17:01:10,588 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 17:01:10,588 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 17:01:10,590 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 17:01:10,590 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 17:01:10,590 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 17:01:10,590 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 17:01:10,590 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 17:01:10,590 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 17:01:10,590 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 17:01:10,590 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 17:01:10,591 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 17:01:10,591 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 17:01:10,591 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 17:01:10,591 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 17:01:10,592 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 17:01:10,592 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 17:01:10,592 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 17:01:10,592 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 17:01:10,592 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 17:01:10,592 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 17:01:10,592 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 17:01:10,592 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 17:01:10,592 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 17:01:10,592 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 17:01:10,784 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 17:01:10,799 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 17:01:10,800 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 17:01:10,801 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 17:01:10,801 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 17:01:10,802 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sorting_selectionsort_2_ground.i [2022-01-31 17:01:10,847 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c35331203/203cd186af274c1f9405f8c9b6a0bc19/FLAGdc118af07 [2022-01-31 17:01:11,237 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 17:01:11,237 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/sorting_selectionsort_2_ground.i [2022-01-31 17:01:11,241 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c35331203/203cd186af274c1f9405f8c9b6a0bc19/FLAGdc118af07 [2022-01-31 17:01:11,250 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c35331203/203cd186af274c1f9405f8c9b6a0bc19 [2022-01-31 17:01:11,252 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 17:01:11,253 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 17:01:11,254 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 17:01:11,255 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 17:01:11,257 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 17:01:11,258 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:01:11" (1/1) ... [2022-01-31 17:01:11,258 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d4eadd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:01:11, skipping insertion in model container [2022-01-31 17:01:11,258 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:01:11" (1/1) ... [2022-01-31 17:01:11,263 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 17:01:11,273 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 17:01:11,434 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/sorting_selectionsort_2_ground.i[823,836] [2022-01-31 17:01:11,461 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 17:01:11,470 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 17:01:11,479 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/sorting_selectionsort_2_ground.i[823,836] [2022-01-31 17:01:11,497 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 17:01:11,505 INFO L208 MainTranslator]: Completed translation [2022-01-31 17:01:11,505 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:01:11 WrapperNode [2022-01-31 17:01:11,506 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 17:01:11,506 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 17:01:11,506 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 17:01:11,506 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 17:01:11,515 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:01:11" (1/1) ... [2022-01-31 17:01:11,516 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:01:11" (1/1) ... [2022-01-31 17:01:11,526 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:01:11" (1/1) ... [2022-01-31 17:01:11,527 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:01:11" (1/1) ... [2022-01-31 17:01:11,541 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:01:11" (1/1) ... [2022-01-31 17:01:11,545 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:01:11" (1/1) ... [2022-01-31 17:01:11,546 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:01:11" (1/1) ... [2022-01-31 17:01:11,547 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 17:01:11,548 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 17:01:11,548 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 17:01:11,548 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 17:01:11,550 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:01:11" (1/1) ... [2022-01-31 17:01:11,555 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 17:01:11,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 17:01:11,570 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 17:01:11,588 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 17:01:11,597 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 17:01:11,597 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 17:01:11,597 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 17:01:11,597 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 17:01:11,598 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 17:01:11,598 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 17:01:11,598 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 17:01:11,598 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 17:01:11,598 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 17:01:11,599 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 17:01:11,599 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 17:01:11,599 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 17:01:11,599 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 17:01:11,599 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 17:01:11,600 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 17:01:11,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 17:01:11,601 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 17:01:11,601 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 17:01:11,601 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 17:01:11,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 17:01:11,601 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 17:01:11,659 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 17:01:11,660 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 17:01:11,801 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 17:01:11,806 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 17:01:11,806 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2022-01-31 17:01:11,807 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:01:11 BoogieIcfgContainer [2022-01-31 17:01:11,808 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 17:01:11,809 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 17:01:11,809 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 17:01:11,812 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 17:01:11,812 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 05:01:11" (1/3) ... [2022-01-31 17:01:11,812 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@643fdfb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:01:11, skipping insertion in model container [2022-01-31 17:01:11,813 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:01:11" (2/3) ... [2022-01-31 17:01:11,813 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@643fdfb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:01:11, skipping insertion in model container [2022-01-31 17:01:11,813 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:01:11" (3/3) ... [2022-01-31 17:01:11,814 INFO L111 eAbstractionObserver]: Analyzing ICFG sorting_selectionsort_2_ground.i [2022-01-31 17:01:11,817 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 17:01:11,817 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 17:01:11,847 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 17:01:11,853 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 17:01:11,853 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 17:01:11,871 INFO L276 IsEmpty]: Start isEmpty. Operand has 45 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 36 states have internal predecessors, (55), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 17:01:11,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-31 17:01:11,882 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:11,883 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:11,883 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:11,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:11,889 INFO L85 PathProgramCache]: Analyzing trace with hash -185709015, now seen corresponding path program 1 times [2022-01-31 17:01:11,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:11,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1066145266] [2022-01-31 17:01:11,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:11,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:11,947 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:11,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:12,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:12,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:12,064 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 17:01:12,066 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:12,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1066145266] [2022-01-31 17:01:12,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1066145266] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:12,068 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:12,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 17:01:12,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243178930] [2022-01-31 17:01:12,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:12,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 17:01:12,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:12,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 17:01:12,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 17:01:12,097 INFO L87 Difference]: Start difference. First operand has 45 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 36 states have internal predecessors, (55), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:12,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:12,154 INFO L93 Difference]: Finished difference Result 82 states and 123 transitions. [2022-01-31 17:01:12,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 17:01:12,156 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 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 16 [2022-01-31 17:01:12,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:12,162 INFO L225 Difference]: With dead ends: 82 [2022-01-31 17:01:12,163 INFO L226 Difference]: Without dead ends: 40 [2022-01-31 17:01:12,165 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 17:01:12,167 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 43 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:12,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 56 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:01:12,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-01-31 17:01:12,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-01-31 17:01:12,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 32 states have (on average 1.3125) internal successors, (42), 32 states have internal predecessors, (42), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 17:01:12,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2022-01-31 17:01:12,210 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 16 [2022-01-31 17:01:12,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:12,210 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2022-01-31 17:01:12,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:12,211 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2022-01-31 17:01:12,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-31 17:01:12,213 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:12,213 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:12,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 17:01:12,214 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:12,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:12,215 INFO L85 PathProgramCache]: Analyzing trace with hash 874426105, now seen corresponding path program 1 times [2022-01-31 17:01:12,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:12,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [829041591] [2022-01-31 17:01:12,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:12,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:12,222 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:12,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:12,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:12,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:12,298 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 17:01:12,298 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:12,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [829041591] [2022-01-31 17:01:12,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [829041591] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:12,299 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:12,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 17:01:12,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204073894] [2022-01-31 17:01:12,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:12,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 17:01:12,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:12,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 17:01:12,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 17:01:12,302 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:12,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:12,449 INFO L93 Difference]: Finished difference Result 92 states and 123 transitions. [2022-01-31 17:01:12,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 17:01:12,451 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 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 16 [2022-01-31 17:01:12,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:12,452 INFO L225 Difference]: With dead ends: 92 [2022-01-31 17:01:12,452 INFO L226 Difference]: Without dead ends: 60 [2022-01-31 17:01:12,453 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 17:01:12,454 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 82 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:12,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 45 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:12,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-01-31 17:01:12,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 42. [2022-01-31 17:01:12,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 34 states have internal predecessors, (44), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 17:01:12,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2022-01-31 17:01:12,463 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 16 [2022-01-31 17:01:12,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:12,465 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2022-01-31 17:01:12,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:12,466 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2022-01-31 17:01:12,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-31 17:01:12,467 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:12,467 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:12,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 17:01:12,468 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:12,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:12,471 INFO L85 PathProgramCache]: Analyzing trace with hash -2112897826, now seen corresponding path program 1 times [2022-01-31 17:01:12,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:12,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [630727434] [2022-01-31 17:01:12,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:12,491 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:12,491 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:12,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:12,493 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:12,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:12,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:12,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:12,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:12,571 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:12,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [630727434] [2022-01-31 17:01:12,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [630727434] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:12,571 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:12,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 17:01:12,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834304856] [2022-01-31 17:01:12,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:12,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 17:01:12,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:12,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 17:01:12,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 17:01:12,572 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:12,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:12,767 INFO L93 Difference]: Finished difference Result 113 states and 152 transitions. [2022-01-31 17:01:12,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 17:01:12,768 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 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 20 [2022-01-31 17:01:12,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:12,769 INFO L225 Difference]: With dead ends: 113 [2022-01-31 17:01:12,769 INFO L226 Difference]: Without dead ends: 80 [2022-01-31 17:01:12,769 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 17:01:12,770 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 147 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:12,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 43 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:12,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-01-31 17:01:12,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 62. [2022-01-31 17:01:12,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 52 states have (on average 1.3076923076923077) internal successors, (68), 52 states have internal predecessors, (68), 7 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:01:12,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 81 transitions. [2022-01-31 17:01:12,812 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 81 transitions. Word has length 20 [2022-01-31 17:01:12,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:12,812 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 81 transitions. [2022-01-31 17:01:12,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:12,813 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 81 transitions. [2022-01-31 17:01:12,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 17:01:12,813 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:12,813 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:12,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 17:01:12,814 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:12,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:12,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1293336384, now seen corresponding path program 2 times [2022-01-31 17:01:12,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:12,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [823093575] [2022-01-31 17:01:12,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:12,817 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:12,817 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:12,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:12,818 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:12,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:12,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:12,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:12,894 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 17:01:12,894 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:12,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [823093575] [2022-01-31 17:01:12,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [823093575] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:12,894 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:12,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 17:01:12,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158817218] [2022-01-31 17:01:12,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:12,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 17:01:12,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:12,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 17:01:12,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-31 17:01:12,896 INFO L87 Difference]: Start difference. First operand 62 states and 81 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:13,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:13,053 INFO L93 Difference]: Finished difference Result 111 states and 148 transitions. [2022-01-31 17:01:13,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 17:01:13,054 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 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 22 [2022-01-31 17:01:13,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:13,057 INFO L225 Difference]: With dead ends: 111 [2022-01-31 17:01:13,057 INFO L226 Difference]: Without dead ends: 65 [2022-01-31 17:01:13,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-31 17:01:13,067 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 93 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:13,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 45 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:13,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-01-31 17:01:13,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2022-01-31 17:01:13,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 53 states have (on average 1.3018867924528301) internal successors, (69), 53 states have internal predecessors, (69), 7 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:01:13,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 82 transitions. [2022-01-31 17:01:13,077 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 82 transitions. Word has length 22 [2022-01-31 17:01:13,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:13,077 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 82 transitions. [2022-01-31 17:01:13,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:13,078 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 82 transitions. [2022-01-31 17:01:13,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-31 17:01:13,078 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:13,078 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:13,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 17:01:13,079 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:13,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:13,082 INFO L85 PathProgramCache]: Analyzing trace with hash 408020165, now seen corresponding path program 1 times [2022-01-31 17:01:13,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:13,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1877163819] [2022-01-31 17:01:13,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:13,088 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:13,088 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:13,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:13,089 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:13,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:13,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:13,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:13,168 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 17:01:13,168 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:13,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1877163819] [2022-01-31 17:01:13,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1877163819] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:13,168 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:13,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 17:01:13,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695130962] [2022-01-31 17:01:13,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:13,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 17:01:13,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:13,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 17:01:13,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 17:01:13,171 INFO L87 Difference]: Start difference. First operand 63 states and 82 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 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 17:01:13,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:13,305 INFO L93 Difference]: Finished difference Result 114 states and 152 transitions. [2022-01-31 17:01:13,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 17:01:13,306 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 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 25 [2022-01-31 17:01:13,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:13,309 INFO L225 Difference]: With dead ends: 114 [2022-01-31 17:01:13,310 INFO L226 Difference]: Without dead ends: 68 [2022-01-31 17:01:13,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-01-31 17:01:13,318 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 103 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:13,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 45 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:13,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-01-31 17:01:13,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2022-01-31 17:01:13,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 56 states have (on average 1.3035714285714286) internal successors, (73), 56 states have internal predecessors, (73), 7 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:01:13,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 86 transitions. [2022-01-31 17:01:13,329 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 86 transitions. Word has length 25 [2022-01-31 17:01:13,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:13,329 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 86 transitions. [2022-01-31 17:01:13,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 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 17:01:13,329 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 86 transitions. [2022-01-31 17:01:13,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 17:01:13,330 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:13,330 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:13,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 17:01:13,330 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:13,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:13,330 INFO L85 PathProgramCache]: Analyzing trace with hash 611911328, now seen corresponding path program 2 times [2022-01-31 17:01:13,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:13,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [699280750] [2022-01-31 17:01:13,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:13,333 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:13,333 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:13,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:13,334 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:13,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:13,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:13,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:13,398 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 17:01:13,398 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:13,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [699280750] [2022-01-31 17:01:13,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [699280750] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:13,398 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:13,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 17:01:13,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432524964] [2022-01-31 17:01:13,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:13,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 17:01:13,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:13,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 17:01:13,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 17:01:13,399 INFO L87 Difference]: Start difference. First operand 66 states and 86 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 17:01:13,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:13,506 INFO L93 Difference]: Finished difference Result 105 states and 138 transitions. [2022-01-31 17:01:13,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 17:01:13,506 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 28 [2022-01-31 17:01:13,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:13,507 INFO L225 Difference]: With dead ends: 105 [2022-01-31 17:01:13,507 INFO L226 Difference]: Without dead ends: 61 [2022-01-31 17:01:13,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-31 17:01:13,508 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 64 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:13,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 51 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:13,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-01-31 17:01:13,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-01-31 17:01:13,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 52 states have internal predecessors, (67), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 17:01:13,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 78 transitions. [2022-01-31 17:01:13,517 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 78 transitions. Word has length 28 [2022-01-31 17:01:13,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:13,517 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 78 transitions. [2022-01-31 17:01:13,517 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 17:01:13,517 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 78 transitions. [2022-01-31 17:01:13,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-31 17:01:13,518 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:13,518 INFO L514 BasicCegarLoop]: trace histogram [2, 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 17:01:13,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 17:01:13,518 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:13,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:13,519 INFO L85 PathProgramCache]: Analyzing trace with hash 304744698, now seen corresponding path program 1 times [2022-01-31 17:01:13,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:13,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [850042312] [2022-01-31 17:01:13,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:13,521 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:13,521 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:13,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:13,522 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:13,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:13,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:13,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:13,556 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 17:01:13,557 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:13,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [850042312] [2022-01-31 17:01:13,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [850042312] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:13,557 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:13,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 17:01:13,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012441896] [2022-01-31 17:01:13,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:13,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 17:01:13,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:13,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 17:01:13,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 17:01:13,558 INFO L87 Difference]: Start difference. First operand 61 states and 78 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 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 17:01:13,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:13,715 INFO L93 Difference]: Finished difference Result 149 states and 200 transitions. [2022-01-31 17:01:13,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 17:01:13,715 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 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 29 [2022-01-31 17:01:13,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:13,717 INFO L225 Difference]: With dead ends: 149 [2022-01-31 17:01:13,717 INFO L226 Difference]: Without dead ends: 99 [2022-01-31 17:01:13,718 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 17:01:13,718 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 171 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:13,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 50 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:13,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-01-31 17:01:13,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 81. [2022-01-31 17:01:13,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 70 states have (on average 1.3) internal successors, (91), 70 states have internal predecessors, (91), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 17:01:13,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 106 transitions. [2022-01-31 17:01:13,728 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 106 transitions. Word has length 29 [2022-01-31 17:01:13,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:13,728 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 106 transitions. [2022-01-31 17:01:13,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 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 17:01:13,728 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 106 transitions. [2022-01-31 17:01:13,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-31 17:01:13,729 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:13,729 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 17:01:13,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 17:01:13,729 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:13,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:13,729 INFO L85 PathProgramCache]: Analyzing trace with hash 53068632, now seen corresponding path program 2 times [2022-01-31 17:01:13,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:13,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [752697959] [2022-01-31 17:01:13,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:13,731 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:13,731 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:13,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:13,732 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:13,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:13,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:13,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:13,770 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 17:01:13,770 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:13,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [752697959] [2022-01-31 17:01:13,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [752697959] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:13,771 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:13,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 17:01:13,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068484963] [2022-01-31 17:01:13,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:13,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 17:01:13,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:13,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 17:01:13,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-31 17:01:13,772 INFO L87 Difference]: Start difference. First operand 81 states and 106 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 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 17:01:13,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:13,981 INFO L93 Difference]: Finished difference Result 187 states and 254 transitions. [2022-01-31 17:01:13,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 17:01:13,981 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 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 31 [2022-01-31 17:01:13,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:13,983 INFO L225 Difference]: With dead ends: 187 [2022-01-31 17:01:13,983 INFO L226 Difference]: Without dead ends: 119 [2022-01-31 17:01:13,983 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 17:01:13,984 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 247 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:13,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 48 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:01:13,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-01-31 17:01:14,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 101. [2022-01-31 17:01:14,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 88 states have (on average 1.3068181818181819) internal successors, (115), 88 states have internal predecessors, (115), 10 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 17:01:14,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 134 transitions. [2022-01-31 17:01:14,013 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 134 transitions. Word has length 31 [2022-01-31 17:01:14,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:14,013 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 134 transitions. [2022-01-31 17:01:14,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 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 17:01:14,013 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 134 transitions. [2022-01-31 17:01:14,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-31 17:01:14,014 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:14,014 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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 17:01:14,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 17:01:14,016 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:14,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:14,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1289462218, now seen corresponding path program 3 times [2022-01-31 17:01:14,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:14,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [128571882] [2022-01-31 17:01:14,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:14,021 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:14,021 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:14,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:14,023 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:14,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:14,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:14,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:14,093 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 17:01:14,093 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:14,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [128571882] [2022-01-31 17:01:14,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [128571882] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:14,094 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:14,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 17:01:14,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302995522] [2022-01-31 17:01:14,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:14,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 17:01:14,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:14,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 17:01:14,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 17:01:14,095 INFO L87 Difference]: Start difference. First operand 101 states and 134 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 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 17:01:14,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:14,343 INFO L93 Difference]: Finished difference Result 225 states and 308 transitions. [2022-01-31 17:01:14,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 17:01:14,344 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 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 33 [2022-01-31 17:01:14,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:14,345 INFO L225 Difference]: With dead ends: 225 [2022-01-31 17:01:14,345 INFO L226 Difference]: Without dead ends: 139 [2022-01-31 17:01:14,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2022-01-31 17:01:14,347 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 278 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:14,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 53 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:01:14,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-01-31 17:01:14,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 121. [2022-01-31 17:01:14,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 106 states have (on average 1.3113207547169812) internal successors, (139), 106 states have internal predecessors, (139), 12 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-01-31 17:01:14,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 162 transitions. [2022-01-31 17:01:14,367 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 162 transitions. Word has length 33 [2022-01-31 17:01:14,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:14,367 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 162 transitions. [2022-01-31 17:01:14,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 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 17:01:14,367 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 162 transitions. [2022-01-31 17:01:14,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-31 17:01:14,371 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:14,371 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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 17:01:14,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 17:01:14,372 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:14,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:14,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1323547028, now seen corresponding path program 4 times [2022-01-31 17:01:14,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:14,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1862048011] [2022-01-31 17:01:14,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:14,375 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:14,375 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:14,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:14,376 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:14,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:14,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:14,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:14,466 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 17:01:14,466 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:14,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1862048011] [2022-01-31 17:01:14,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1862048011] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:14,467 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:14,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 17:01:14,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573883941] [2022-01-31 17:01:14,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:14,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 17:01:14,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:14,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 17:01:14,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-31 17:01:14,468 INFO L87 Difference]: Start difference. First operand 121 states and 162 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 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 17:01:14,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:14,724 INFO L93 Difference]: Finished difference Result 263 states and 362 transitions. [2022-01-31 17:01:14,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 17:01:14,725 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 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 35 [2022-01-31 17:01:14,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:14,726 INFO L225 Difference]: With dead ends: 263 [2022-01-31 17:01:14,726 INFO L226 Difference]: Without dead ends: 159 [2022-01-31 17:01:14,726 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 17:01:14,727 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 363 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:14,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [366 Valid, 50 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:01:14,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-01-31 17:01:14,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 141. [2022-01-31 17:01:14,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 124 states have (on average 1.314516129032258) internal successors, (163), 124 states have internal predecessors, (163), 14 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-01-31 17:01:14,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 190 transitions. [2022-01-31 17:01:14,742 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 190 transitions. Word has length 35 [2022-01-31 17:01:14,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:14,742 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 190 transitions. [2022-01-31 17:01:14,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 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 17:01:14,742 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 190 transitions. [2022-01-31 17:01:14,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-31 17:01:14,743 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:14,743 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 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 17:01:14,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 17:01:14,743 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:14,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:14,743 INFO L85 PathProgramCache]: Analyzing trace with hash -130435726, now seen corresponding path program 5 times [2022-01-31 17:01:14,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:14,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [699919678] [2022-01-31 17:01:14,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:14,746 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:14,746 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:14,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:14,747 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:14,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:14,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:14,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:14,841 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 17:01:14,842 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:14,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [699919678] [2022-01-31 17:01:14,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [699919678] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:14,842 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:14,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 17:01:14,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754581307] [2022-01-31 17:01:14,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:14,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 17:01:14,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:14,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 17:01:14,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-01-31 17:01:14,843 INFO L87 Difference]: Start difference. First operand 141 states and 190 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 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 17:01:15,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:15,299 INFO L93 Difference]: Finished difference Result 301 states and 416 transitions. [2022-01-31 17:01:15,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 17:01:15,300 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 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 37 [2022-01-31 17:01:15,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:15,301 INFO L225 Difference]: With dead ends: 301 [2022-01-31 17:01:15,301 INFO L226 Difference]: Without dead ends: 179 [2022-01-31 17:01:15,301 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 17:01:15,302 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 472 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:15,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [475 Valid, 50 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:01:15,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-01-31 17:01:15,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 161. [2022-01-31 17:01:15,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 142 states have (on average 1.3169014084507042) internal successors, (187), 142 states have internal predecessors, (187), 16 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-01-31 17:01:15,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 218 transitions. [2022-01-31 17:01:15,331 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 218 transitions. Word has length 37 [2022-01-31 17:01:15,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:15,332 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 218 transitions. [2022-01-31 17:01:15,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 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 17:01:15,332 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 218 transitions. [2022-01-31 17:01:15,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-31 17:01:15,332 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:15,332 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 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 17:01:15,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 17:01:15,333 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:15,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:15,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1543491120, now seen corresponding path program 6 times [2022-01-31 17:01:15,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:15,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1294870834] [2022-01-31 17:01:15,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:15,335 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:15,335 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:15,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:15,336 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:15,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:15,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:15,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:15,436 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 17:01:15,436 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:15,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1294870834] [2022-01-31 17:01:15,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1294870834] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:15,436 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:15,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 17:01:15,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746212881] [2022-01-31 17:01:15,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:15,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 17:01:15,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:15,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 17:01:15,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2022-01-31 17:01:15,437 INFO L87 Difference]: Start difference. First operand 161 states and 218 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 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 17:01:15,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:15,826 INFO L93 Difference]: Finished difference Result 339 states and 470 transitions. [2022-01-31 17:01:15,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 17:01:15,827 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 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 39 [2022-01-31 17:01:15,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:15,828 INFO L225 Difference]: With dead ends: 339 [2022-01-31 17:01:15,828 INFO L226 Difference]: Without dead ends: 199 [2022-01-31 17:01:15,828 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 17:01:15,829 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 589 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 592 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:15,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [592 Valid, 49 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:01:15,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-01-31 17:01:15,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 181. [2022-01-31 17:01:15,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 160 states have (on average 1.31875) internal successors, (211), 160 states have internal predecessors, (211), 18 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-01-31 17:01:15,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 246 transitions. [2022-01-31 17:01:15,844 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 246 transitions. Word has length 39 [2022-01-31 17:01:15,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:15,844 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 246 transitions. [2022-01-31 17:01:15,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 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 17:01:15,845 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 246 transitions. [2022-01-31 17:01:15,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-31 17:01:15,845 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:15,845 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 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 17:01:15,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-31 17:01:15,846 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:15,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:15,846 INFO L85 PathProgramCache]: Analyzing trace with hash 2014908078, now seen corresponding path program 7 times [2022-01-31 17:01:15,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:15,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [995059738] [2022-01-31 17:01:15,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:15,848 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:15,848 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:15,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:15,849 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:15,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:15,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:15,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:15,916 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 17:01:15,916 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:15,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [995059738] [2022-01-31 17:01:15,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [995059738] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:15,916 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:15,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 17:01:15,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303276751] [2022-01-31 17:01:15,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:15,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 17:01:15,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:15,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 17:01:15,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-01-31 17:01:15,917 INFO L87 Difference]: Start difference. First operand 181 states and 246 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 17:01:16,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:16,395 INFO L93 Difference]: Finished difference Result 377 states and 524 transitions. [2022-01-31 17:01:16,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 17:01:16,395 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 41 [2022-01-31 17:01:16,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:16,397 INFO L225 Difference]: With dead ends: 377 [2022-01-31 17:01:16,397 INFO L226 Difference]: Without dead ends: 219 [2022-01-31 17:01:16,397 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 17:01:16,400 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 605 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 608 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:16,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [608 Valid, 48 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:01:16,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-01-31 17:01:16,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 201. [2022-01-31 17:01:16,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 178 states have (on average 1.3202247191011236) internal successors, (235), 178 states have internal predecessors, (235), 20 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-01-31 17:01:16,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 274 transitions. [2022-01-31 17:01:16,434 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 274 transitions. Word has length 41 [2022-01-31 17:01:16,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:16,435 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 274 transitions. [2022-01-31 17:01:16,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 17:01:16,435 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 274 transitions. [2022-01-31 17:01:16,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-31 17:01:16,438 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:16,438 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 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 17:01:16,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 17:01:16,439 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:16,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:16,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1452397556, now seen corresponding path program 8 times [2022-01-31 17:01:16,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:16,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [442751999] [2022-01-31 17:01:16,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:16,441 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:16,441 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:16,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:16,442 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:16,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:16,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:16,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:16,593 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 17:01:16,593 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:16,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [442751999] [2022-01-31 17:01:16,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [442751999] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:16,593 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:16,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 17:01:16,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983596063] [2022-01-31 17:01:16,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:16,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 17:01:16,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:16,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 17:01:16,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2022-01-31 17:01:16,594 INFO L87 Difference]: Start difference. First operand 201 states and 274 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 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 17:01:17,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:17,196 INFO L93 Difference]: Finished difference Result 415 states and 578 transitions. [2022-01-31 17:01:17,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 17:01:17,197 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 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 43 [2022-01-31 17:01:17,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:17,199 INFO L225 Difference]: With dead ends: 415 [2022-01-31 17:01:17,199 INFO L226 Difference]: Without dead ends: 239 [2022-01-31 17:01:17,200 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 17:01:17,200 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 714 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 717 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:17,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [717 Valid, 59 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:01:17,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-01-31 17:01:17,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 221. [2022-01-31 17:01:17,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 196 states have (on average 1.3214285714285714) internal successors, (259), 196 states have internal predecessors, (259), 22 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-01-31 17:01:17,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 302 transitions. [2022-01-31 17:01:17,238 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 302 transitions. Word has length 43 [2022-01-31 17:01:17,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:17,238 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 302 transitions. [2022-01-31 17:01:17,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 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 17:01:17,238 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 302 transitions. [2022-01-31 17:01:17,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-31 17:01:17,239 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:17,239 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 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 17:01:17,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-31 17:01:17,239 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:17,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:17,256 INFO L85 PathProgramCache]: Analyzing trace with hash -638490134, now seen corresponding path program 9 times [2022-01-31 17:01:17,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:17,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1149330234] [2022-01-31 17:01:17,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:17,258 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:17,258 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:17,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:17,259 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:17,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:17,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:17,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:17,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:17,426 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:17,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1149330234] [2022-01-31 17:01:17,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1149330234] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:17,426 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:17,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 17:01:17,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367049176] [2022-01-31 17:01:17,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:17,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 17:01:17,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:17,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 17:01:17,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-01-31 17:01:17,428 INFO L87 Difference]: Start difference. First operand 221 states and 302 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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 17:01:18,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:18,161 INFO L93 Difference]: Finished difference Result 453 states and 632 transitions. [2022-01-31 17:01:18,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 17:01:18,161 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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 45 [2022-01-31 17:01:18,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:18,162 INFO L225 Difference]: With dead ends: 453 [2022-01-31 17:01:18,162 INFO L226 Difference]: Without dead ends: 259 [2022-01-31 17:01:18,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2022-01-31 17:01:18,163 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 668 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 671 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:18,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [671 Valid, 57 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:01:18,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-01-31 17:01:18,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 241. [2022-01-31 17:01:18,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 214 states have (on average 1.3224299065420562) internal successors, (283), 214 states have internal predecessors, (283), 24 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-01-31 17:01:18,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 330 transitions. [2022-01-31 17:01:18,207 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 330 transitions. Word has length 45 [2022-01-31 17:01:18,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:18,207 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 330 transitions. [2022-01-31 17:01:18,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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 17:01:18,207 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 330 transitions. [2022-01-31 17:01:18,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-31 17:01:18,208 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:18,208 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 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 17:01:18,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-31 17:01:18,208 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:18,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:18,208 INFO L85 PathProgramCache]: Analyzing trace with hash -157505464, now seen corresponding path program 10 times [2022-01-31 17:01:18,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:18,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1408973466] [2022-01-31 17:01:18,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:18,210 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:18,210 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:18,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:18,211 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:18,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:18,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:18,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:18,383 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 17:01:18,383 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:18,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1408973466] [2022-01-31 17:01:18,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1408973466] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:18,383 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:18,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 17:01:18,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21369150] [2022-01-31 17:01:18,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:18,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 17:01:18,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:18,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 17:01:18,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2022-01-31 17:01:18,384 INFO L87 Difference]: Start difference. First operand 241 states and 330 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 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 17:01:19,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:19,025 INFO L93 Difference]: Finished difference Result 491 states and 686 transitions. [2022-01-31 17:01:19,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 17:01:19,025 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 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 47 [2022-01-31 17:01:19,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:19,027 INFO L225 Difference]: With dead ends: 491 [2022-01-31 17:01:19,027 INFO L226 Difference]: Without dead ends: 279 [2022-01-31 17:01:19,027 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 17:01:19,028 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 724 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 727 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:19,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [727 Valid, 66 Invalid, 636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:01:19,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-01-31 17:01:19,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 261. [2022-01-31 17:01:19,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 232 states have (on average 1.3232758620689655) internal successors, (307), 232 states have internal predecessors, (307), 26 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-01-31 17:01:19,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 358 transitions. [2022-01-31 17:01:19,054 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 358 transitions. Word has length 47 [2022-01-31 17:01:19,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:19,054 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 358 transitions. [2022-01-31 17:01:19,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 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 17:01:19,054 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 358 transitions. [2022-01-31 17:01:19,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-01-31 17:01:19,055 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:19,055 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 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 17:01:19,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-31 17:01:19,055 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:19,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:19,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1787705562, now seen corresponding path program 11 times [2022-01-31 17:01:19,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:19,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1586988299] [2022-01-31 17:01:19,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:19,057 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:19,057 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:19,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:19,058 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:19,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:19,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:19,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:19,188 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 17:01:19,188 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:19,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1586988299] [2022-01-31 17:01:19,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1586988299] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:19,188 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:19,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 17:01:19,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512546343] [2022-01-31 17:01:19,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:19,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 17:01:19,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:19,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 17:01:19,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2022-01-31 17:01:19,190 INFO L87 Difference]: Start difference. First operand 261 states and 358 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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 17:01:19,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:19,747 INFO L93 Difference]: Finished difference Result 529 states and 740 transitions. [2022-01-31 17:01:19,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 17:01:19,747 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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 49 [2022-01-31 17:01:19,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:19,748 INFO L225 Difference]: With dead ends: 529 [2022-01-31 17:01:19,748 INFO L226 Difference]: Without dead ends: 299 [2022-01-31 17:01:19,749 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 17:01:19,750 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 965 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 968 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:19,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [968 Valid, 47 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:01:19,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-01-31 17:01:19,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 281. [2022-01-31 17:01:19,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 250 states have (on average 1.324) internal successors, (331), 250 states have internal predecessors, (331), 28 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-01-31 17:01:19,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 386 transitions. [2022-01-31 17:01:19,793 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 386 transitions. Word has length 49 [2022-01-31 17:01:19,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:19,794 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 386 transitions. [2022-01-31 17:01:19,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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 17:01:19,794 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 386 transitions. [2022-01-31 17:01:19,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-31 17:01:19,794 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:19,794 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 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 17:01:19,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-31 17:01:19,794 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:19,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:19,795 INFO L85 PathProgramCache]: Analyzing trace with hash -746936700, now seen corresponding path program 12 times [2022-01-31 17:01:19,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:19,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1798772274] [2022-01-31 17:01:19,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:19,796 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:19,796 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:19,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:19,797 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:19,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:19,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:19,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:19,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:19,904 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:19,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1798772274] [2022-01-31 17:01:19,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1798772274] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:19,905 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:19,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 17:01:19,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147719987] [2022-01-31 17:01:19,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:19,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 17:01:19,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:19,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 17:01:19,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2022-01-31 17:01:19,906 INFO L87 Difference]: Start difference. First operand 281 states and 386 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 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 17:01:20,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:20,536 INFO L93 Difference]: Finished difference Result 567 states and 794 transitions. [2022-01-31 17:01:20,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 17:01:20,536 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 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 51 [2022-01-31 17:01:20,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:20,538 INFO L225 Difference]: With dead ends: 567 [2022-01-31 17:01:20,538 INFO L226 Difference]: Without dead ends: 319 [2022-01-31 17:01:20,539 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 17:01:20,539 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 1194 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1197 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:20,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1197 Valid, 68 Invalid, 783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:01:20,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2022-01-31 17:01:20,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 301. [2022-01-31 17:01:20,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 268 states have (on average 1.3246268656716418) internal successors, (355), 268 states have internal predecessors, (355), 30 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-01-31 17:01:20,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 414 transitions. [2022-01-31 17:01:20,587 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 414 transitions. Word has length 51 [2022-01-31 17:01:20,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:20,587 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 414 transitions. [2022-01-31 17:01:20,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 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 17:01:20,587 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 414 transitions. [2022-01-31 17:01:20,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-31 17:01:20,587 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:20,587 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 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 17:01:20,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-31 17:01:20,588 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:20,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:20,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1295440286, now seen corresponding path program 13 times [2022-01-31 17:01:20,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:20,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [238966965] [2022-01-31 17:01:20,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:20,589 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:20,589 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:20,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:20,590 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:20,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:20,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:20,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:20,718 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 17:01:20,718 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:20,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [238966965] [2022-01-31 17:01:20,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [238966965] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:20,718 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:20,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 17:01:20,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917021092] [2022-01-31 17:01:20,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:20,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 17:01:20,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:20,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 17:01:20,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-01-31 17:01:20,719 INFO L87 Difference]: Start difference. First operand 301 states and 414 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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 17:01:21,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:21,344 INFO L93 Difference]: Finished difference Result 605 states and 848 transitions. [2022-01-31 17:01:21,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 17:01:21,345 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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 53 [2022-01-31 17:01:21,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:21,346 INFO L225 Difference]: With dead ends: 605 [2022-01-31 17:01:21,346 INFO L226 Difference]: Without dead ends: 339 [2022-01-31 17:01:21,347 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 17:01:21,348 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 953 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 956 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:21,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [956 Valid, 68 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:01:21,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2022-01-31 17:01:21,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 321. [2022-01-31 17:01:21,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 286 states have (on average 1.3251748251748252) internal successors, (379), 286 states have internal predecessors, (379), 32 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-01-31 17:01:21,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 442 transitions. [2022-01-31 17:01:21,416 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 442 transitions. Word has length 53 [2022-01-31 17:01:21,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:21,416 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 442 transitions. [2022-01-31 17:01:21,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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 17:01:21,416 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 442 transitions. [2022-01-31 17:01:21,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-31 17:01:21,416 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:21,416 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 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 17:01:21,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-31 17:01:21,417 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:21,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:21,417 INFO L85 PathProgramCache]: Analyzing trace with hash -126409024, now seen corresponding path program 14 times [2022-01-31 17:01:21,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:21,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [540913995] [2022-01-31 17:01:21,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:21,421 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:21,421 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:21,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:21,422 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:21,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:21,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:21,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:21,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:21,598 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:21,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [540913995] [2022-01-31 17:01:21,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [540913995] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:21,598 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:21,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 17:01:21,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320551421] [2022-01-31 17:01:21,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:21,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 17:01:21,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:21,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 17:01:21,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2022-01-31 17:01:21,600 INFO L87 Difference]: Start difference. First operand 321 states and 442 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 18 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 17:01:22,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:22,409 INFO L93 Difference]: Finished difference Result 643 states and 902 transitions. [2022-01-31 17:01:22,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 17:01:22,409 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 18 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 55 [2022-01-31 17:01:22,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:22,411 INFO L225 Difference]: With dead ends: 643 [2022-01-31 17:01:22,411 INFO L226 Difference]: Without dead ends: 359 [2022-01-31 17:01:22,412 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 17:01:22,412 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 1173 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1176 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:22,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1176 Valid, 62 Invalid, 812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:01:22,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-01-31 17:01:22,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 341. [2022-01-31 17:01:22,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 304 states have (on average 1.325657894736842) internal successors, (403), 304 states have internal predecessors, (403), 34 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2022-01-31 17:01:22,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 470 transitions. [2022-01-31 17:01:22,499 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 470 transitions. Word has length 55 [2022-01-31 17:01:22,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:22,499 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 470 transitions. [2022-01-31 17:01:22,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 18 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 17:01:22,500 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 470 transitions. [2022-01-31 17:01:22,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-31 17:01:22,500 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:22,500 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 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 17:01:22,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-31 17:01:22,500 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:22,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:22,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1968797794, now seen corresponding path program 15 times [2022-01-31 17:01:22,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:22,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [705790371] [2022-01-31 17:01:22,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:22,502 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:22,502 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:22,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:22,516 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:22,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:22,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:22,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:22,668 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 17:01:22,669 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:22,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [705790371] [2022-01-31 17:01:22,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [705790371] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:22,669 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:22,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 17:01:22,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394272887] [2022-01-31 17:01:22,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:22,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 17:01:22,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:22,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 17:01:22,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2022-01-31 17:01:22,671 INFO L87 Difference]: Start difference. First operand 341 states and 470 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 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 17:01:23,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:23,237 INFO L93 Difference]: Finished difference Result 681 states and 956 transitions. [2022-01-31 17:01:23,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 17:01:23,238 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 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 57 [2022-01-31 17:01:23,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:23,239 INFO L225 Difference]: With dead ends: 681 [2022-01-31 17:01:23,239 INFO L226 Difference]: Without dead ends: 379 [2022-01-31 17:01:23,240 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 17:01:23,241 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 1080 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 721 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1083 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:23,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1083 Valid, 65 Invalid, 937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 721 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:01:23,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2022-01-31 17:01:23,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 361. [2022-01-31 17:01:23,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 322 states have (on average 1.326086956521739) internal successors, (427), 322 states have internal predecessors, (427), 36 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-01-31 17:01:23,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 498 transitions. [2022-01-31 17:01:23,328 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 498 transitions. Word has length 57 [2022-01-31 17:01:23,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:23,329 INFO L470 AbstractCegarLoop]: Abstraction has 361 states and 498 transitions. [2022-01-31 17:01:23,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 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 17:01:23,329 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 498 transitions. [2022-01-31 17:01:23,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-31 17:01:23,336 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:23,336 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 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 17:01:23,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-31 17:01:23,336 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:23,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:23,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1317087484, now seen corresponding path program 16 times [2022-01-31 17:01:23,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:23,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [136434386] [2022-01-31 17:01:23,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:23,338 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:23,338 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:23,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:23,340 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:23,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:23,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:23,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:23,488 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 17:01:23,488 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:23,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [136434386] [2022-01-31 17:01:23,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [136434386] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:23,488 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:23,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 17:01:23,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309087355] [2022-01-31 17:01:23,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:23,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 17:01:23,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:23,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 17:01:23,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2022-01-31 17:01:23,489 INFO L87 Difference]: Start difference. First operand 361 states and 498 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 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 17:01:24,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:24,138 INFO L93 Difference]: Finished difference Result 719 states and 1010 transitions. [2022-01-31 17:01:24,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 17:01:24,140 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 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 59 [2022-01-31 17:01:24,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:24,141 INFO L225 Difference]: With dead ends: 719 [2022-01-31 17:01:24,141 INFO L226 Difference]: Without dead ends: 399 [2022-01-31 17:01:24,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=570, Invalid=912, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 17:01:24,143 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 1275 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1278 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:24,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1278 Valid, 54 Invalid, 902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:01:24,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2022-01-31 17:01:24,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 381. [2022-01-31 17:01:24,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 340 states have (on average 1.326470588235294) internal successors, (451), 340 states have internal predecessors, (451), 38 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-01-31 17:01:24,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 526 transitions. [2022-01-31 17:01:24,247 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 526 transitions. Word has length 59 [2022-01-31 17:01:24,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:24,247 INFO L470 AbstractCegarLoop]: Abstraction has 381 states and 526 transitions. [2022-01-31 17:01:24,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 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 17:01:24,247 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 526 transitions. [2022-01-31 17:01:24,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-31 17:01:24,248 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:24,248 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 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 17:01:24,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-31 17:01:24,248 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:24,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:24,248 INFO L85 PathProgramCache]: Analyzing trace with hash -2043090214, now seen corresponding path program 17 times [2022-01-31 17:01:24,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:24,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1143933061] [2022-01-31 17:01:24,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:24,250 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:24,250 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:24,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:24,264 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:24,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:24,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:24,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:24,456 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 17:01:24,457 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:24,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1143933061] [2022-01-31 17:01:24,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1143933061] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:24,457 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:24,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 17:01:24,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835261489] [2022-01-31 17:01:24,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:24,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 17:01:24,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:24,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 17:01:24,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2022-01-31 17:01:24,458 INFO L87 Difference]: Start difference. First operand 381 states and 526 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 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 17:01:25,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:25,235 INFO L93 Difference]: Finished difference Result 757 states and 1064 transitions. [2022-01-31 17:01:25,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 17:01:25,236 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 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 61 [2022-01-31 17:01:25,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:25,237 INFO L225 Difference]: With dead ends: 757 [2022-01-31 17:01:25,237 INFO L226 Difference]: Without dead ends: 419 [2022-01-31 17:01:25,239 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 17:01:25,242 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 1404 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 276 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1407 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 276 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:25,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1407 Valid, 58 Invalid, 983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [276 Valid, 707 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:01:25,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2022-01-31 17:01:25,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 401. [2022-01-31 17:01:25,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 358 states have (on average 1.3268156424581006) internal successors, (475), 358 states have internal predecessors, (475), 40 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2022-01-31 17:01:25,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 554 transitions. [2022-01-31 17:01:25,308 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 554 transitions. Word has length 61 [2022-01-31 17:01:25,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:25,308 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 554 transitions. [2022-01-31 17:01:25,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 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 17:01:25,309 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 554 transitions. [2022-01-31 17:01:25,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 17:01:25,309 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:25,309 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 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 17:01:25,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-31 17:01:25,309 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:25,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:25,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1358451400, now seen corresponding path program 18 times [2022-01-31 17:01:25,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:25,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1232794429] [2022-01-31 17:01:25,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:25,312 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:25,313 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:25,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:25,314 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:25,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:25,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:25,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:25,497 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 17:01:25,497 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:25,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1232794429] [2022-01-31 17:01:25,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1232794429] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:25,497 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:25,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 17:01:25,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824649007] [2022-01-31 17:01:25,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:25,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 17:01:25,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:25,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 17:01:25,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2022-01-31 17:01:25,499 INFO L87 Difference]: Start difference. First operand 401 states and 554 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 22 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 17:01:26,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:26,295 INFO L93 Difference]: Finished difference Result 795 states and 1118 transitions. [2022-01-31 17:01:26,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 17:01:26,295 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 22 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 63 [2022-01-31 17:01:26,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:26,297 INFO L225 Difference]: With dead ends: 795 [2022-01-31 17:01:26,297 INFO L226 Difference]: Without dead ends: 439 [2022-01-31 17:01:26,301 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 17:01:26,302 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 1367 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 270 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1370 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 1011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 270 IncrementalHoareTripleChecker+Valid, 741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:26,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1370 Valid, 57 Invalid, 1011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [270 Valid, 741 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:01:26,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2022-01-31 17:01:26,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 421. [2022-01-31 17:01:26,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 376 states have (on average 1.327127659574468) internal successors, (499), 376 states have internal predecessors, (499), 42 states have call successors, (42), 3 states have call predecessors, (42), 2 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2022-01-31 17:01:26,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 582 transitions. [2022-01-31 17:01:26,353 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 582 transitions. Word has length 63 [2022-01-31 17:01:26,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:26,354 INFO L470 AbstractCegarLoop]: Abstraction has 421 states and 582 transitions. [2022-01-31 17:01:26,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 22 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 17:01:26,354 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 582 transitions. [2022-01-31 17:01:26,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-31 17:01:26,354 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:26,354 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 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 17:01:26,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-31 17:01:26,354 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:26,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:26,355 INFO L85 PathProgramCache]: Analyzing trace with hash -550547434, now seen corresponding path program 19 times [2022-01-31 17:01:26,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:26,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [34583954] [2022-01-31 17:01:26,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:26,358 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:26,358 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:26,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:26,360 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:26,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:26,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:26,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:26,548 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 17:01:26,549 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:26,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [34583954] [2022-01-31 17:01:26,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [34583954] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:26,549 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:26,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 17:01:26,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415331778] [2022-01-31 17:01:26,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:26,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 17:01:26,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:26,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 17:01:26,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2022-01-31 17:01:26,550 INFO L87 Difference]: Start difference. First operand 421 states and 582 transitions. Second operand has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 23 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 17:01:27,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:27,427 INFO L93 Difference]: Finished difference Result 833 states and 1172 transitions. [2022-01-31 17:01:27,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 17:01:27,427 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 23 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 65 [2022-01-31 17:01:27,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:27,429 INFO L225 Difference]: With dead ends: 833 [2022-01-31 17:01:27,429 INFO L226 Difference]: Without dead ends: 459 [2022-01-31 17:01:27,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=759, Invalid=1221, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 17:01:27,432 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 1569 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 302 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1572 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 302 IncrementalHoareTripleChecker+Valid, 745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:27,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1572 Valid, 50 Invalid, 1047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [302 Valid, 745 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:01:27,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2022-01-31 17:01:27,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 441. [2022-01-31 17:01:27,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 394 states have (on average 1.3274111675126903) internal successors, (523), 394 states have internal predecessors, (523), 44 states have call successors, (44), 3 states have call predecessors, (44), 2 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2022-01-31 17:01:27,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 610 transitions. [2022-01-31 17:01:27,490 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 610 transitions. Word has length 65 [2022-01-31 17:01:27,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:27,490 INFO L470 AbstractCegarLoop]: Abstraction has 441 states and 610 transitions. [2022-01-31 17:01:27,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 23 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 17:01:27,491 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 610 transitions. [2022-01-31 17:01:27,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-31 17:01:27,492 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:27,492 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 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 17:01:27,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-31 17:01:27,492 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:27,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:27,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1543916684, now seen corresponding path program 20 times [2022-01-31 17:01:27,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:27,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [31432783] [2022-01-31 17:01:27,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:27,495 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:27,495 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:27,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:27,497 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:27,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:27,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:27,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:27,702 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 17:01:27,702 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:27,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [31432783] [2022-01-31 17:01:27,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [31432783] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:27,702 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:27,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 17:01:27,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434957743] [2022-01-31 17:01:27,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:27,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 17:01:27,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:27,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 17:01:27,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2022-01-31 17:01:27,703 INFO L87 Difference]: Start difference. First operand 441 states and 610 transitions. Second operand has 25 states, 25 states have (on average 2.4) internal successors, (60), 24 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 17:01:28,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:28,626 INFO L93 Difference]: Finished difference Result 871 states and 1226 transitions. [2022-01-31 17:01:28,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 17:01:28,626 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 24 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 67 [2022-01-31 17:01:28,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:28,628 INFO L225 Difference]: With dead ends: 871 [2022-01-31 17:01:28,628 INFO L226 Difference]: Without dead ends: 479 [2022-01-31 17:01:28,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=828, Invalid=1334, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 17:01:28,629 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 1922 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 857 mSolverCounterSat, 371 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1925 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 1228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 371 IncrementalHoareTripleChecker+Valid, 857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:28,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1925 Valid, 67 Invalid, 1228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [371 Valid, 857 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:01:28,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2022-01-31 17:01:28,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 461. [2022-01-31 17:01:28,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 412 states have (on average 1.3276699029126213) internal successors, (547), 412 states have internal predecessors, (547), 46 states have call successors, (46), 3 states have call predecessors, (46), 2 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2022-01-31 17:01:28,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 638 transitions. [2022-01-31 17:01:28,688 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 638 transitions. Word has length 67 [2022-01-31 17:01:28,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:28,688 INFO L470 AbstractCegarLoop]: Abstraction has 461 states and 638 transitions. [2022-01-31 17:01:28,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 24 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 17:01:28,688 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 638 transitions. [2022-01-31 17:01:28,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-31 17:01:28,688 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:28,688 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 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 17:01:28,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-01-31 17:01:28,689 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:28,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:28,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1605941074, now seen corresponding path program 21 times [2022-01-31 17:01:28,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:28,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1786931552] [2022-01-31 17:01:28,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:28,690 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:28,690 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:28,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:28,692 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:28,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:28,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:28,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:28,920 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 17:01:28,921 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:28,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1786931552] [2022-01-31 17:01:28,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1786931552] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:28,921 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:28,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 17:01:28,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677103573] [2022-01-31 17:01:28,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:28,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 17:01:28,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:28,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 17:01:28,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-01-31 17:01:28,923 INFO L87 Difference]: Start difference. First operand 461 states and 638 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 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 17:01:29,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:29,865 INFO L93 Difference]: Finished difference Result 909 states and 1280 transitions. [2022-01-31 17:01:29,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 17:01:29,865 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 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 69 [2022-01-31 17:01:29,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:29,867 INFO L225 Difference]: With dead ends: 909 [2022-01-31 17:01:29,868 INFO L226 Difference]: Without dead ends: 499 [2022-01-31 17:01:29,869 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 17:01:29,869 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 1377 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 945 mSolverCounterSat, 278 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1380 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 1223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 278 IncrementalHoareTripleChecker+Valid, 945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:29,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1380 Valid, 72 Invalid, 1223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [278 Valid, 945 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:01:29,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2022-01-31 17:01:29,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 481. [2022-01-31 17:01:29,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 430 states have (on average 1.327906976744186) internal successors, (571), 430 states have internal predecessors, (571), 48 states have call successors, (48), 3 states have call predecessors, (48), 2 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2022-01-31 17:01:29,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 666 transitions. [2022-01-31 17:01:29,957 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 666 transitions. Word has length 69 [2022-01-31 17:01:29,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:29,957 INFO L470 AbstractCegarLoop]: Abstraction has 481 states and 666 transitions. [2022-01-31 17:01:29,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 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 17:01:29,957 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 666 transitions. [2022-01-31 17:01:29,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-31 17:01:29,957 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:29,957 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 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 17:01:29,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-01-31 17:01:29,958 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:29,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:29,958 INFO L85 PathProgramCache]: Analyzing trace with hash 667302832, now seen corresponding path program 22 times [2022-01-31 17:01:29,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:29,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1486064429] [2022-01-31 17:01:29,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:29,959 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:29,959 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:29,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:29,960 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:29,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:30,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:30,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:30,190 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 17:01:30,190 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:30,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1486064429] [2022-01-31 17:01:30,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1486064429] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:30,190 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:30,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 17:01:30,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171934998] [2022-01-31 17:01:30,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:30,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 17:01:30,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:30,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 17:01:30,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2022-01-31 17:01:30,191 INFO L87 Difference]: Start difference. First operand 481 states and 666 transitions. Second operand has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 26 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 17:01:31,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:31,158 INFO L93 Difference]: Finished difference Result 947 states and 1334 transitions. [2022-01-31 17:01:31,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 17:01:31,158 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 26 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 71 [2022-01-31 17:01:31,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:31,160 INFO L225 Difference]: With dead ends: 947 [2022-01-31 17:01:31,160 INFO L226 Difference]: Without dead ends: 519 [2022-01-31 17:01:31,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=975, Invalid=1575, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 17:01:31,162 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 1502 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 979 mSolverCounterSat, 302 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1505 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 1281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 302 IncrementalHoareTripleChecker+Valid, 979 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:31,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1505 Valid, 72 Invalid, 1281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [302 Valid, 979 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:01:31,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2022-01-31 17:01:31,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 501. [2022-01-31 17:01:31,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 448 states have (on average 1.328125) internal successors, (595), 448 states have internal predecessors, (595), 50 states have call successors, (50), 3 states have call predecessors, (50), 2 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) [2022-01-31 17:01:31,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 694 transitions. [2022-01-31 17:01:31,248 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 694 transitions. Word has length 71 [2022-01-31 17:01:31,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:31,249 INFO L470 AbstractCegarLoop]: Abstraction has 501 states and 694 transitions. [2022-01-31 17:01:31,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 26 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 17:01:31,249 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 694 transitions. [2022-01-31 17:01:31,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-31 17:01:31,249 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:31,249 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 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 17:01:31,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-01-31 17:01:31,250 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:31,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:31,250 INFO L85 PathProgramCache]: Analyzing trace with hash 579084430, now seen corresponding path program 23 times [2022-01-31 17:01:31,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:31,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [584175098] [2022-01-31 17:01:31,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:31,253 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:31,253 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:31,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:31,255 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:31,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:31,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:31,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:31,507 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 17:01:31,508 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:31,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [584175098] [2022-01-31 17:01:31,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [584175098] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:31,508 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:31,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 17:01:31,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54075949] [2022-01-31 17:01:31,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:31,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 17:01:31,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:31,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 17:01:31,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2022-01-31 17:01:31,509 INFO L87 Difference]: Start difference. First operand 501 states and 694 transitions. Second operand has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 27 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 17:01:32,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:32,529 INFO L93 Difference]: Finished difference Result 985 states and 1388 transitions. [2022-01-31 17:01:32,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 17:01:32,531 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 27 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 73 [2022-01-31 17:01:32,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:32,532 INFO L225 Difference]: With dead ends: 985 [2022-01-31 17:01:32,533 INFO L226 Difference]: Without dead ends: 539 [2022-01-31 17:01:32,534 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 17:01:32,534 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 1874 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 935 mSolverCounterSat, 368 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1877 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 368 IncrementalHoareTripleChecker+Valid, 935 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:32,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1877 Valid, 58 Invalid, 1303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [368 Valid, 935 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:01:32,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2022-01-31 17:01:32,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 521. [2022-01-31 17:01:32,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 466 states have (on average 1.3283261802575108) internal successors, (619), 466 states have internal predecessors, (619), 52 states have call successors, (52), 3 states have call predecessors, (52), 2 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2022-01-31 17:01:32,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 722 transitions. [2022-01-31 17:01:32,610 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 722 transitions. Word has length 73 [2022-01-31 17:01:32,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:32,610 INFO L470 AbstractCegarLoop]: Abstraction has 521 states and 722 transitions. [2022-01-31 17:01:32,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 27 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 17:01:32,610 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 722 transitions. [2022-01-31 17:01:32,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-31 17:01:32,612 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:32,612 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 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 17:01:32,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-01-31 17:01:32,612 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:32,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:32,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1700546028, now seen corresponding path program 24 times [2022-01-31 17:01:32,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:32,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1154317026] [2022-01-31 17:01:32,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:32,614 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:32,614 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:32,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:32,615 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:32,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:32,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:32,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:32,909 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 17:01:32,909 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:32,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1154317026] [2022-01-31 17:01:32,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1154317026] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:32,909 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:32,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 17:01:32,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662452428] [2022-01-31 17:01:32,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:32,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 17:01:32,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:32,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 17:01:32,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2022-01-31 17:01:32,910 INFO L87 Difference]: Start difference. First operand 521 states and 722 transitions. Second operand has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 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 17:01:34,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:34,166 INFO L93 Difference]: Finished difference Result 1023 states and 1442 transitions. [2022-01-31 17:01:34,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 17:01:34,167 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 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 75 [2022-01-31 17:01:34,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:34,169 INFO L225 Difference]: With dead ends: 1023 [2022-01-31 17:01:34,169 INFO L226 Difference]: Without dead ends: 559 [2022-01-31 17:01:34,170 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 17:01:34,170 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 1775 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1057 mSolverCounterSat, 353 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1778 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 1410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 353 IncrementalHoareTripleChecker+Valid, 1057 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:34,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1778 Valid, 67 Invalid, 1410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [353 Valid, 1057 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:01:34,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2022-01-31 17:01:34,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 541. [2022-01-31 17:01:34,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 484 states have (on average 1.328512396694215) internal successors, (643), 484 states have internal predecessors, (643), 54 states have call successors, (54), 3 states have call predecessors, (54), 2 states have return successors, (53), 53 states have call predecessors, (53), 53 states have call successors, (53) [2022-01-31 17:01:34,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 750 transitions. [2022-01-31 17:01:34,247 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 750 transitions. Word has length 75 [2022-01-31 17:01:34,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:34,247 INFO L470 AbstractCegarLoop]: Abstraction has 541 states and 750 transitions. [2022-01-31 17:01:34,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 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 17:01:34,247 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 750 transitions. [2022-01-31 17:01:34,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-31 17:01:34,248 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:34,248 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 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 17:01:34,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-01-31 17:01:34,248 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:34,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:34,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1388350410, now seen corresponding path program 25 times [2022-01-31 17:01:34,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:34,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1113495634] [2022-01-31 17:01:34,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:34,250 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:34,250 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:34,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:34,251 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:34,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:34,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:34,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:34,547 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 17:01:34,547 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:34,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1113495634] [2022-01-31 17:01:34,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1113495634] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:34,548 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:34,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 17:01:34,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881988065] [2022-01-31 17:01:34,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:34,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 17:01:34,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:34,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 17:01:34,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2022-01-31 17:01:34,549 INFO L87 Difference]: Start difference. First operand 541 states and 750 transitions. Second operand has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 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 17:01:35,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:35,536 INFO L93 Difference]: Finished difference Result 1061 states and 1496 transitions. [2022-01-31 17:01:35,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 17:01:35,537 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 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 77 [2022-01-31 17:01:35,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:35,539 INFO L225 Difference]: With dead ends: 1061 [2022-01-31 17:01:35,539 INFO L226 Difference]: Without dead ends: 579 [2022-01-31 17:01:35,540 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 17:01:35,541 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 2136 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1011 mSolverCounterSat, 420 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2139 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 1431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 420 IncrementalHoareTripleChecker+Valid, 1011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:35,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2139 Valid, 69 Invalid, 1431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [420 Valid, 1011 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:01:35,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2022-01-31 17:01:35,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 561. [2022-01-31 17:01:35,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 502 states have (on average 1.3286852589641434) internal successors, (667), 502 states have internal predecessors, (667), 56 states have call successors, (56), 3 states have call predecessors, (56), 2 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2022-01-31 17:01:35,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 778 transitions. [2022-01-31 17:01:35,655 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 778 transitions. Word has length 77 [2022-01-31 17:01:35,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:35,656 INFO L470 AbstractCegarLoop]: Abstraction has 561 states and 778 transitions. [2022-01-31 17:01:35,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 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 17:01:35,656 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 778 transitions. [2022-01-31 17:01:35,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-31 17:01:35,656 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:35,656 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 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 17:01:35,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-01-31 17:01:35,656 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:35,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:35,657 INFO L85 PathProgramCache]: Analyzing trace with hash 2016072232, now seen corresponding path program 26 times [2022-01-31 17:01:35,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:35,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1804347481] [2022-01-31 17:01:35,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:35,658 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:35,658 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:35,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:35,659 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:35,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:36,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:36,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:36,041 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 17:01:36,041 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:36,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1804347481] [2022-01-31 17:01:36,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1804347481] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:36,041 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:36,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 17:01:36,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427446750] [2022-01-31 17:01:36,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:36,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 17:01:36,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:36,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 17:01:36,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2022-01-31 17:01:36,042 INFO L87 Difference]: Start difference. First operand 561 states and 778 transitions. Second operand has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 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 17:01:37,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:37,006 INFO L93 Difference]: Finished difference Result 1099 states and 1550 transitions. [2022-01-31 17:01:37,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 17:01:37,006 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 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 79 [2022-01-31 17:01:37,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:37,008 INFO L225 Difference]: With dead ends: 1099 [2022-01-31 17:01:37,008 INFO L226 Difference]: Without dead ends: 599 [2022-01-31 17:01:37,010 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 17:01:37,010 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 2719 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 983 mSolverCounterSat, 511 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2722 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 1494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 511 IncrementalHoareTripleChecker+Valid, 983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:37,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2722 Valid, 59 Invalid, 1494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [511 Valid, 983 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:01:37,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2022-01-31 17:01:37,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 581. [2022-01-31 17:01:37,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 520 states have (on average 1.3288461538461538) internal successors, (691), 520 states have internal predecessors, (691), 58 states have call successors, (58), 3 states have call predecessors, (58), 2 states have return successors, (57), 57 states have call predecessors, (57), 57 states have call successors, (57) [2022-01-31 17:01:37,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 806 transitions. [2022-01-31 17:01:37,144 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 806 transitions. Word has length 79 [2022-01-31 17:01:37,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:37,145 INFO L470 AbstractCegarLoop]: Abstraction has 581 states and 806 transitions. [2022-01-31 17:01:37,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 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 17:01:37,145 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 806 transitions. [2022-01-31 17:01:37,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-01-31 17:01:37,145 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:37,145 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 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 17:01:37,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-01-31 17:01:37,145 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:37,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:37,146 INFO L85 PathProgramCache]: Analyzing trace with hash -333645562, now seen corresponding path program 27 times [2022-01-31 17:01:37,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:37,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1156929238] [2022-01-31 17:01:37,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:37,147 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:37,147 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:37,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:37,148 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:37,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:37,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:37,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:37,486 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 17:01:37,486 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:37,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1156929238] [2022-01-31 17:01:37,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1156929238] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:37,486 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:37,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 17:01:37,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749201811] [2022-01-31 17:01:37,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:37,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 17:01:37,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:37,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 17:01:37,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2022-01-31 17:01:37,488 INFO L87 Difference]: Start difference. First operand 581 states and 806 transitions. Second operand has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 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 17:01:38,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:38,438 INFO L93 Difference]: Finished difference Result 1137 states and 1604 transitions. [2022-01-31 17:01:38,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 17:01:38,438 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 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 81 [2022-01-31 17:01:38,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:38,440 INFO L225 Difference]: With dead ends: 1137 [2022-01-31 17:01:38,440 INFO L226 Difference]: Without dead ends: 619 [2022-01-31 17:01:38,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1395, Invalid=2265, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 17:01:38,442 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 2167 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1069 mSolverCounterSat, 422 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2170 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 1491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 422 IncrementalHoareTripleChecker+Valid, 1069 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:38,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2170 Valid, 64 Invalid, 1491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [422 Valid, 1069 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:01:38,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2022-01-31 17:01:38,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 601. [2022-01-31 17:01:38,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 538 states have (on average 1.328996282527881) internal successors, (715), 538 states have internal predecessors, (715), 60 states have call successors, (60), 3 states have call predecessors, (60), 2 states have return successors, (59), 59 states have call predecessors, (59), 59 states have call successors, (59) [2022-01-31 17:01:38,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 834 transitions. [2022-01-31 17:01:38,564 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 834 transitions. Word has length 81 [2022-01-31 17:01:38,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:38,565 INFO L470 AbstractCegarLoop]: Abstraction has 601 states and 834 transitions. [2022-01-31 17:01:38,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 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 17:01:38,565 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 834 transitions. [2022-01-31 17:01:38,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-31 17:01:38,566 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:38,567 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 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 17:01:38,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-01-31 17:01:38,574 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:38,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:38,575 INFO L85 PathProgramCache]: Analyzing trace with hash 740352100, now seen corresponding path program 28 times [2022-01-31 17:01:38,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:38,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1933774403] [2022-01-31 17:01:38,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:38,579 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:38,579 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:38,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:38,580 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:38,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:38,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:38,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:38,997 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 17:01:38,997 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:38,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1933774403] [2022-01-31 17:01:38,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1933774403] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:38,997 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:38,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 17:01:38,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689239038] [2022-01-31 17:01:38,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:38,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 17:01:38,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:38,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 17:01:38,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 17:01:38,998 INFO L87 Difference]: Start difference. First operand 601 states and 834 transitions. Second operand has 33 states, 33 states have (on average 2.303030303030303) internal successors, (76), 32 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 17:01:40,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:40,484 INFO L93 Difference]: Finished difference Result 1175 states and 1658 transitions. [2022-01-31 17:01:40,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 17:01:40,484 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.303030303030303) internal successors, (76), 32 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 83 [2022-01-31 17:01:40,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:40,486 INFO L225 Difference]: With dead ends: 1175 [2022-01-31 17:01:40,486 INFO L226 Difference]: Without dead ends: 639 [2022-01-31 17:01:40,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1488, Invalid=2418, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 17:01:40,488 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 2135 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1199 mSolverCounterSat, 422 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2138 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 1621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 422 IncrementalHoareTripleChecker+Valid, 1199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:40,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2138 Valid, 72 Invalid, 1621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [422 Valid, 1199 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:01:40,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2022-01-31 17:01:40,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 621. [2022-01-31 17:01:40,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 621 states, 556 states have (on average 1.329136690647482) internal successors, (739), 556 states have internal predecessors, (739), 62 states have call successors, (62), 3 states have call predecessors, (62), 2 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) [2022-01-31 17:01:40,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 862 transitions. [2022-01-31 17:01:40,601 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 862 transitions. Word has length 83 [2022-01-31 17:01:40,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:40,601 INFO L470 AbstractCegarLoop]: Abstraction has 621 states and 862 transitions. [2022-01-31 17:01:40,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.303030303030303) internal successors, (76), 32 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 17:01:40,601 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 862 transitions. [2022-01-31 17:01:40,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-01-31 17:01:40,601 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:40,601 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 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 17:01:40,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-01-31 17:01:40,602 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:40,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:40,602 INFO L85 PathProgramCache]: Analyzing trace with hash 2059954242, now seen corresponding path program 29 times [2022-01-31 17:01:40,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:40,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1306055904] [2022-01-31 17:01:40,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:40,604 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:40,604 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:40,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:40,605 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:40,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:40,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:40,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:40,998 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 17:01:40,999 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:40,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1306055904] [2022-01-31 17:01:40,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1306055904] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:40,999 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:40,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 17:01:40,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912687747] [2022-01-31 17:01:40,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:40,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 17:01:40,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:40,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 17:01:41,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 17:01:41,000 INFO L87 Difference]: Start difference. First operand 621 states and 862 transitions. Second operand has 34 states, 34 states have (on average 2.2941176470588234) internal successors, (78), 33 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 17:01:42,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:42,381 INFO L93 Difference]: Finished difference Result 1213 states and 1712 transitions. [2022-01-31 17:01:42,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 17:01:42,382 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.2941176470588234) internal successors, (78), 33 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 85 [2022-01-31 17:01:42,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:42,384 INFO L225 Difference]: With dead ends: 1213 [2022-01-31 17:01:42,384 INFO L226 Difference]: Without dead ends: 659 [2022-01-31 17:01:42,385 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 17:01:42,386 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 2227 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1261 mSolverCounterSat, 440 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2230 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 1701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 440 IncrementalHoareTripleChecker+Valid, 1261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:42,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2230 Valid, 68 Invalid, 1701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [440 Valid, 1261 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:01:42,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2022-01-31 17:01:42,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 641. [2022-01-31 17:01:42,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 641 states, 574 states have (on average 1.329268292682927) internal successors, (763), 574 states have internal predecessors, (763), 64 states have call successors, (64), 3 states have call predecessors, (64), 2 states have return successors, (63), 63 states have call predecessors, (63), 63 states have call successors, (63) [2022-01-31 17:01:42,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 890 transitions. [2022-01-31 17:01:42,522 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 890 transitions. Word has length 85 [2022-01-31 17:01:42,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:42,522 INFO L470 AbstractCegarLoop]: Abstraction has 641 states and 890 transitions. [2022-01-31 17:01:42,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.2941176470588234) internal successors, (78), 33 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 17:01:42,522 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 890 transitions. [2022-01-31 17:01:42,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-01-31 17:01:42,522 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:42,523 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 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 17:01:42,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-01-31 17:01:42,523 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:42,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:42,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1112706912, now seen corresponding path program 30 times [2022-01-31 17:01:42,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:42,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1509422192] [2022-01-31 17:01:42,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:42,525 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:42,525 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:42,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:42,526 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:42,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:42,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:42,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:42,805 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 17:01:42,805 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:42,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1509422192] [2022-01-31 17:01:42,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1509422192] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:42,805 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:42,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 17:01:42,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081652744] [2022-01-31 17:01:42,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:42,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 17:01:42,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:42,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 17:01:42,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 17:01:42,807 INFO L87 Difference]: Start difference. First operand 641 states and 890 transitions. Second operand has 35 states, 35 states have (on average 2.2857142857142856) internal successors, (80), 34 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 17:01:44,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:44,430 INFO L93 Difference]: Finished difference Result 1251 states and 1766 transitions. [2022-01-31 17:01:44,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 17:01:44,430 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2857142857142856) internal successors, (80), 34 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 87 [2022-01-31 17:01:44,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:44,433 INFO L225 Difference]: With dead ends: 1251 [2022-01-31 17:01:44,433 INFO L226 Difference]: Without dead ends: 679 [2022-01-31 17:01:44,434 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 17:01:44,435 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 2767 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1121 mSolverCounterSat, 535 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2770 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 1656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 535 IncrementalHoareTripleChecker+Valid, 1121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:44,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2770 Valid, 63 Invalid, 1656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [535 Valid, 1121 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:01:44,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2022-01-31 17:01:44,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 661. [2022-01-31 17:01:44,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 661 states, 592 states have (on average 1.3293918918918919) internal successors, (787), 592 states have internal predecessors, (787), 66 states have call successors, (66), 3 states have call predecessors, (66), 2 states have return successors, (65), 65 states have call predecessors, (65), 65 states have call successors, (65) [2022-01-31 17:01:44,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 918 transitions. [2022-01-31 17:01:44,545 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 918 transitions. Word has length 87 [2022-01-31 17:01:44,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:44,545 INFO L470 AbstractCegarLoop]: Abstraction has 661 states and 918 transitions. [2022-01-31 17:01:44,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2857142857142856) internal successors, (80), 34 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 17:01:44,545 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 918 transitions. [2022-01-31 17:01:44,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-01-31 17:01:44,546 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:44,546 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 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 17:01:44,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-01-31 17:01:44,546 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:44,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:44,546 INFO L85 PathProgramCache]: Analyzing trace with hash -613295746, now seen corresponding path program 31 times [2022-01-31 17:01:44,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:44,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [122895443] [2022-01-31 17:01:44,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:44,548 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:44,548 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:44,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:44,549 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:44,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:44,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:44,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:44,973 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 17:01:44,973 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:44,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [122895443] [2022-01-31 17:01:44,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [122895443] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:44,973 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:44,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 17:01:44,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408997230] [2022-01-31 17:01:44,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:44,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 17:01:44,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:44,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 17:01:44,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 17:01:44,974 INFO L87 Difference]: Start difference. First operand 661 states and 918 transitions. Second operand has 36 states, 36 states have (on average 2.2777777777777777) internal successors, (82), 35 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 17:01:46,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:46,644 INFO L93 Difference]: Finished difference Result 1289 states and 1820 transitions. [2022-01-31 17:01:46,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 17:01:46,645 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.2777777777777777) internal successors, (82), 35 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 89 [2022-01-31 17:01:46,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:46,647 INFO L225 Difference]: With dead ends: 1289 [2022-01-31 17:01:46,647 INFO L226 Difference]: Without dead ends: 699 [2022-01-31 17:01:46,649 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 17:01:46,649 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 2552 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1259 mSolverCounterSat, 498 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2555 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 1757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 498 IncrementalHoareTripleChecker+Valid, 1259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:46,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2555 Valid, 68 Invalid, 1757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [498 Valid, 1259 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:01:46,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2022-01-31 17:01:46,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 681. [2022-01-31 17:01:46,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 610 states have (on average 1.3295081967213114) internal successors, (811), 610 states have internal predecessors, (811), 68 states have call successors, (68), 3 states have call predecessors, (68), 2 states have return successors, (67), 67 states have call predecessors, (67), 67 states have call successors, (67) [2022-01-31 17:01:46,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 946 transitions. [2022-01-31 17:01:46,786 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 946 transitions. Word has length 89 [2022-01-31 17:01:46,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:46,786 INFO L470 AbstractCegarLoop]: Abstraction has 681 states and 946 transitions. [2022-01-31 17:01:46,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.2777777777777777) internal successors, (82), 35 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 17:01:46,786 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 946 transitions. [2022-01-31 17:01:46,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-01-31 17:01:46,786 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:46,786 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 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 17:01:46,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-01-31 17:01:46,787 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:46,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:46,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1715502372, now seen corresponding path program 32 times [2022-01-31 17:01:46,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:46,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [514871886] [2022-01-31 17:01:46,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:46,789 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:46,789 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:46,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:46,791 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:46,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:47,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:47,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:47,239 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 17:01:47,239 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:47,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [514871886] [2022-01-31 17:01:47,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [514871886] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:47,239 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:47,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 17:01:47,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359285915] [2022-01-31 17:01:47,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:47,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 17:01:47,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:47,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 17:01:47,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 17:01:47,240 INFO L87 Difference]: Start difference. First operand 681 states and 946 transitions. Second operand has 37 states, 37 states have (on average 2.27027027027027) internal successors, (84), 36 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 17:01:48,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:48,963 INFO L93 Difference]: Finished difference Result 1327 states and 1874 transitions. [2022-01-31 17:01:48,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 17:01:48,964 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.27027027027027) internal successors, (84), 36 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 91 [2022-01-31 17:01:48,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:48,966 INFO L225 Difference]: With dead ends: 1327 [2022-01-31 17:01:48,966 INFO L226 Difference]: Without dead ends: 719 [2022-01-31 17:01:48,967 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 17:01:48,968 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 2855 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 1197 mSolverCounterSat, 557 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2858 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 1754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 557 IncrementalHoareTripleChecker+Valid, 1197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:48,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2858 Valid, 52 Invalid, 1754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [557 Valid, 1197 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:01:48,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2022-01-31 17:01:49,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 701. [2022-01-31 17:01:49,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 701 states, 628 states have (on average 1.3296178343949046) internal successors, (835), 628 states have internal predecessors, (835), 70 states have call successors, (70), 3 states have call predecessors, (70), 2 states have return successors, (69), 69 states have call predecessors, (69), 69 states have call successors, (69) [2022-01-31 17:01:49,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 974 transitions. [2022-01-31 17:01:49,111 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 974 transitions. Word has length 91 [2022-01-31 17:01:49,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:49,111 INFO L470 AbstractCegarLoop]: Abstraction has 701 states and 974 transitions. [2022-01-31 17:01:49,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.27027027027027) internal successors, (84), 36 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 17:01:49,112 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 974 transitions. [2022-01-31 17:01:49,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-01-31 17:01:49,112 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:49,112 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 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 17:01:49,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-01-31 17:01:49,112 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:49,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:49,113 INFO L85 PathProgramCache]: Analyzing trace with hash -79147846, now seen corresponding path program 33 times [2022-01-31 17:01:49,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:49,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1661820257] [2022-01-31 17:01:49,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:49,114 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:49,114 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:49,114 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:49,116 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:49,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:49,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:49,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:49,630 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 17:01:49,630 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:49,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1661820257] [2022-01-31 17:01:49,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1661820257] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:49,630 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:49,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 17:01:49,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994460558] [2022-01-31 17:01:49,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:49,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 17:01:49,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:49,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 17:01:49,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 17:01:49,631 INFO L87 Difference]: Start difference. First operand 701 states and 974 transitions. Second operand has 38 states, 38 states have (on average 2.263157894736842) internal successors, (86), 37 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 17:01:51,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:51,445 INFO L93 Difference]: Finished difference Result 1365 states and 1928 transitions. [2022-01-31 17:01:51,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 17:01:51,446 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.263157894736842) internal successors, (86), 37 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 93 [2022-01-31 17:01:51,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:51,452 INFO L225 Difference]: With dead ends: 1365 [2022-01-31 17:01:51,452 INFO L226 Difference]: Without dead ends: 739 [2022-01-31 17:01:51,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1998, Invalid=3258, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 17:01:51,454 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 2862 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1273 mSolverCounterSat, 557 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2865 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 1830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 557 IncrementalHoareTripleChecker+Valid, 1273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:51,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2865 Valid, 69 Invalid, 1830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [557 Valid, 1273 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:01:51,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2022-01-31 17:01:51,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 721. [2022-01-31 17:01:51,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 646 states have (on average 1.3297213622291022) internal successors, (859), 646 states have internal predecessors, (859), 72 states have call successors, (72), 3 states have call predecessors, (72), 2 states have return successors, (71), 71 states have call predecessors, (71), 71 states have call successors, (71) [2022-01-31 17:01:51,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 1002 transitions. [2022-01-31 17:01:51,595 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 1002 transitions. Word has length 93 [2022-01-31 17:01:51,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:51,596 INFO L470 AbstractCegarLoop]: Abstraction has 721 states and 1002 transitions. [2022-01-31 17:01:51,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.263157894736842) internal successors, (86), 37 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 17:01:51,596 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 1002 transitions. [2022-01-31 17:01:51,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-01-31 17:01:51,596 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:51,596 INFO L514 BasicCegarLoop]: trace histogram [35, 35, 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 17:01:51,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-01-31 17:01:51,597 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:51,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:51,597 INFO L85 PathProgramCache]: Analyzing trace with hash 499521304, now seen corresponding path program 34 times [2022-01-31 17:01:51,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:51,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1585818362] [2022-01-31 17:01:51,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:51,599 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:51,599 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:51,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:51,600 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:51,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:51,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:51,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:52,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:52,000 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:52,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1585818362] [2022-01-31 17:01:52,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1585818362] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:52,001 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:52,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-01-31 17:01:52,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265594577] [2022-01-31 17:01:52,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:52,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 17:01:52,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:52,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 17:01:52,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 17:01:52,002 INFO L87 Difference]: Start difference. First operand 721 states and 1002 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 17:01:53,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:53,530 INFO L93 Difference]: Finished difference Result 1403 states and 1982 transitions. [2022-01-31 17:01:53,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 17:01:53,531 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 95 [2022-01-31 17:01:53,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:53,533 INFO L225 Difference]: With dead ends: 1403 [2022-01-31 17:01:53,533 INFO L226 Difference]: Without dead ends: 759 [2022-01-31 17:01:53,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2109, Invalid=3441, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 17:01:53,535 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 3479 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1269 mSolverCounterSat, 667 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3482 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 1936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 667 IncrementalHoareTripleChecker+Valid, 1269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:53,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3482 Valid, 67 Invalid, 1936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [667 Valid, 1269 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:01:53,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2022-01-31 17:01:53,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 741. [2022-01-31 17:01:53,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 741 states, 664 states have (on average 1.3298192771084338) internal successors, (883), 664 states have internal predecessors, (883), 74 states have call successors, (74), 3 states have call predecessors, (74), 2 states have return successors, (73), 73 states have call predecessors, (73), 73 states have call successors, (73) [2022-01-31 17:01:53,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 1030 transitions. [2022-01-31 17:01:53,696 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 1030 transitions. Word has length 95 [2022-01-31 17:01:53,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:53,696 INFO L470 AbstractCegarLoop]: Abstraction has 741 states and 1030 transitions. [2022-01-31 17:01:53,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 17:01:53,696 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 1030 transitions. [2022-01-31 17:01:53,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-01-31 17:01:53,697 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:53,697 INFO L514 BasicCegarLoop]: trace histogram [36, 36, 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 17:01:53,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-01-31 17:01:53,697 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:53,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:53,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1745174026, now seen corresponding path program 35 times [2022-01-31 17:01:53,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:53,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [493818535] [2022-01-31 17:01:53,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:53,700 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:53,700 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:53,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:53,701 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:53,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:54,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:54,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:54,212 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 17:01:54,212 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:54,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [493818535] [2022-01-31 17:01:54,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [493818535] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:54,212 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:54,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-01-31 17:01:54,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480915090] [2022-01-31 17:01:54,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:54,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 17:01:54,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:54,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 17:01:54,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 17:01:54,214 INFO L87 Difference]: Start difference. First operand 741 states and 1030 transitions. Second operand has 40 states, 40 states have (on average 2.25) internal successors, (90), 39 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 17:01:56,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:56,166 INFO L93 Difference]: Finished difference Result 1441 states and 2036 transitions. [2022-01-31 17:01:56,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 17:01:56,166 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.25) internal successors, (90), 39 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 97 [2022-01-31 17:01:56,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:56,168 INFO L225 Difference]: With dead ends: 1441 [2022-01-31 17:01:56,168 INFO L226 Difference]: Without dead ends: 779 [2022-01-31 17:01:56,170 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 17:01:56,170 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 3070 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1353 mSolverCounterSat, 593 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3073 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 1946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 593 IncrementalHoareTripleChecker+Valid, 1353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:56,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3073 Valid, 67 Invalid, 1946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [593 Valid, 1353 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 17:01:56,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2022-01-31 17:01:56,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 761. [2022-01-31 17:01:56,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 761 states, 682 states have (on average 1.3299120234604105) internal successors, (907), 682 states have internal predecessors, (907), 76 states have call successors, (76), 3 states have call predecessors, (76), 2 states have return successors, (75), 75 states have call predecessors, (75), 75 states have call successors, (75) [2022-01-31 17:01:56,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 1058 transitions. [2022-01-31 17:01:56,316 INFO L78 Accepts]: Start accepts. Automaton has 761 states and 1058 transitions. Word has length 97 [2022-01-31 17:01:56,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:56,317 INFO L470 AbstractCegarLoop]: Abstraction has 761 states and 1058 transitions. [2022-01-31 17:01:56,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.25) internal successors, (90), 39 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 17:01:56,317 INFO L276 IsEmpty]: Start isEmpty. Operand 761 states and 1058 transitions. [2022-01-31 17:01:56,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-01-31 17:01:56,317 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:56,317 INFO L514 BasicCegarLoop]: trace histogram [37, 37, 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 17:01:56,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-01-31 17:01:56,317 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:56,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:56,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1471163732, now seen corresponding path program 36 times [2022-01-31 17:01:56,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:56,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1602251947] [2022-01-31 17:01:56,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:56,319 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:56,319 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:56,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:56,321 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:56,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:56,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:56,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:56,874 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 17:01:56,875 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:56,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1602251947] [2022-01-31 17:01:56,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1602251947] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:56,875 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:56,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-01-31 17:01:56,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064888495] [2022-01-31 17:01:56,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:56,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-31 17:01:56,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:56,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-31 17:01:56,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 17:01:56,876 INFO L87 Difference]: Start difference. First operand 761 states and 1058 transitions. Second operand has 41 states, 41 states have (on average 2.2439024390243905) internal successors, (92), 40 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 17:01:58,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:58,917 INFO L93 Difference]: Finished difference Result 1479 states and 2090 transitions. [2022-01-31 17:01:58,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 17:01:58,917 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.2439024390243905) internal successors, (92), 40 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 99 [2022-01-31 17:01:58,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:58,920 INFO L225 Difference]: With dead ends: 1479 [2022-01-31 17:01:58,920 INFO L226 Difference]: Without dead ends: 799 [2022-01-31 17:01:58,921 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 17:01:58,921 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 3170 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1471 mSolverCounterSat, 615 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3173 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 2086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 615 IncrementalHoareTripleChecker+Valid, 1471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:58,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3173 Valid, 69 Invalid, 2086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [615 Valid, 1471 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 17:01:58,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2022-01-31 17:01:59,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 781. [2022-01-31 17:01:59,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 781 states, 700 states have (on average 1.33) internal successors, (931), 700 states have internal predecessors, (931), 78 states have call successors, (78), 3 states have call predecessors, (78), 2 states have return successors, (77), 77 states have call predecessors, (77), 77 states have call successors, (77) [2022-01-31 17:01:59,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 1086 transitions. [2022-01-31 17:01:59,075 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 1086 transitions. Word has length 99 [2022-01-31 17:01:59,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:59,076 INFO L470 AbstractCegarLoop]: Abstraction has 781 states and 1086 transitions. [2022-01-31 17:01:59,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.2439024390243905) internal successors, (92), 40 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 17:01:59,076 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 1086 transitions. [2022-01-31 17:01:59,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-01-31 17:01:59,076 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:59,076 INFO L514 BasicCegarLoop]: trace histogram [38, 38, 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 17:01:59,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-01-31 17:01:59,076 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:59,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:59,077 INFO L85 PathProgramCache]: Analyzing trace with hash -4703950, now seen corresponding path program 37 times [2022-01-31 17:01:59,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:59,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1673558355] [2022-01-31 17:01:59,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:59,079 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:59,079 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:59,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:59,081 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:59,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:59,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:59,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:59,660 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 17:01:59,660 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:59,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1673558355] [2022-01-31 17:01:59,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1673558355] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:59,661 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:59,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-01-31 17:01:59,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418108379] [2022-01-31 17:01:59,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:59,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 17:01:59,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:59,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 17:01:59,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 17:01:59,662 INFO L87 Difference]: Start difference. First operand 781 states and 1086 transitions. Second operand has 42 states, 42 states have (on average 2.238095238095238) internal successors, (94), 41 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 17:02:01,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:01,578 INFO L93 Difference]: Finished difference Result 1517 states and 2144 transitions. [2022-01-31 17:02:01,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-31 17:02:01,578 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.238095238095238) internal successors, (94), 41 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 101 [2022-01-31 17:02:01,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:01,581 INFO L225 Difference]: With dead ends: 1517 [2022-01-31 17:02:01,581 INFO L226 Difference]: Without dead ends: 819 [2022-01-31 17:02:01,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2460, Invalid=4020, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 17:02:01,588 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 3593 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1359 mSolverCounterSat, 687 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3596 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 2046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 687 IncrementalHoareTripleChecker+Valid, 1359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:01,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3596 Valid, 57 Invalid, 2046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [687 Valid, 1359 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:02:01,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2022-01-31 17:02:01,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 801. [2022-01-31 17:02:01,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 801 states, 718 states have (on average 1.33008356545961) internal successors, (955), 718 states have internal predecessors, (955), 80 states have call successors, (80), 3 states have call predecessors, (80), 2 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2022-01-31 17:02:01,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 1114 transitions. [2022-01-31 17:02:01,772 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 1114 transitions. Word has length 101 [2022-01-31 17:02:01,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:01,774 INFO L470 AbstractCegarLoop]: Abstraction has 801 states and 1114 transitions. [2022-01-31 17:02:01,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.238095238095238) internal successors, (94), 41 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 17:02:01,774 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 1114 transitions. [2022-01-31 17:02:01,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-01-31 17:02:01,774 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:01,774 INFO L514 BasicCegarLoop]: trace histogram [39, 39, 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 17:02:01,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-01-31 17:02:01,774 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:01,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:01,775 INFO L85 PathProgramCache]: Analyzing trace with hash -974338672, now seen corresponding path program 38 times [2022-01-31 17:02:01,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:01,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1587608839] [2022-01-31 17:02:01,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:01,777 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:01,777 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:01,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:01,779 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:01,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:02,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:02,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:02,222 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 17:02:02,222 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:02,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1587608839] [2022-01-31 17:02:02,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1587608839] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:02,222 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:02,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-01-31 17:02:02,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632052258] [2022-01-31 17:02:02,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:02,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-31 17:02:02,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:02,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-31 17:02:02,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 17:02:02,223 INFO L87 Difference]: Start difference. First operand 801 states and 1114 transitions. Second operand has 43 states, 43 states have (on average 2.2325581395348837) internal successors, (96), 42 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 17:02:03,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:03,767 INFO L93 Difference]: Finished difference Result 1555 states and 2198 transitions. [2022-01-31 17:02:03,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-31 17:02:03,767 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.2325581395348837) internal successors, (96), 42 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 103 [2022-01-31 17:02:03,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:03,770 INFO L225 Difference]: With dead ends: 1555 [2022-01-31 17:02:03,770 INFO L226 Difference]: Without dead ends: 839 [2022-01-31 17:02:03,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2583, Invalid=4223, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 17:02:03,772 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 3321 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1483 mSolverCounterSat, 649 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3324 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 2132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 649 IncrementalHoareTripleChecker+Valid, 1483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:03,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3324 Valid, 77 Invalid, 2132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [649 Valid, 1483 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:02:03,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2022-01-31 17:02:03,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 821. [2022-01-31 17:02:03,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 736 states have (on average 1.330163043478261) internal successors, (979), 736 states have internal predecessors, (979), 82 states have call successors, (82), 3 states have call predecessors, (82), 2 states have return successors, (81), 81 states have call predecessors, (81), 81 states have call successors, (81) [2022-01-31 17:02:03,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 1142 transitions. [2022-01-31 17:02:03,956 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 1142 transitions. Word has length 103 [2022-01-31 17:02:03,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:03,956 INFO L470 AbstractCegarLoop]: Abstraction has 821 states and 1142 transitions. [2022-01-31 17:02:03,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.2325581395348837) internal successors, (96), 42 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 17:02:03,956 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 1142 transitions. [2022-01-31 17:02:03,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-01-31 17:02:03,957 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:03,957 INFO L514 BasicCegarLoop]: trace histogram [40, 40, 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 17:02:03,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-01-31 17:02:03,957 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:03,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:03,958 INFO L85 PathProgramCache]: Analyzing trace with hash -785403282, now seen corresponding path program 39 times [2022-01-31 17:02:03,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:03,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1871934181] [2022-01-31 17:02:03,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:03,960 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:03,960 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:03,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:03,961 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:04,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:04,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:04,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:04,582 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 17:02:04,582 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:04,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1871934181] [2022-01-31 17:02:04,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1871934181] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:04,582 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:04,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-01-31 17:02:04,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28413936] [2022-01-31 17:02:04,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:04,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 17:02:04,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:04,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 17:02:04,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 17:02:04,583 INFO L87 Difference]: Start difference. First operand 821 states and 1142 transitions. Second operand has 44 states, 44 states have (on average 2.227272727272727) internal successors, (98), 43 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 17:02:06,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:06,875 INFO L93 Difference]: Finished difference Result 1593 states and 2252 transitions. [2022-01-31 17:02:06,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-31 17:02:06,876 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.227272727272727) internal successors, (98), 43 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 105 [2022-01-31 17:02:06,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:06,878 INFO L225 Difference]: With dead ends: 1593 [2022-01-31 17:02:06,878 INFO L226 Difference]: Without dead ends: 859 [2022-01-31 17:02:06,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2709, Invalid=4431, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 17:02:06,880 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 3286 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1727 mSolverCounterSat, 639 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3289 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 2366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 639 IncrementalHoareTripleChecker+Valid, 1727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:06,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3289 Valid, 72 Invalid, 2366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [639 Valid, 1727 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 17:02:06,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2022-01-31 17:02:07,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 841. [2022-01-31 17:02:07,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 754 states have (on average 1.330238726790451) internal successors, (1003), 754 states have internal predecessors, (1003), 84 states have call successors, (84), 3 states have call predecessors, (84), 2 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) [2022-01-31 17:02:07,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 1170 transitions. [2022-01-31 17:02:07,065 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 1170 transitions. Word has length 105 [2022-01-31 17:02:07,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:07,066 INFO L470 AbstractCegarLoop]: Abstraction has 841 states and 1170 transitions. [2022-01-31 17:02:07,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.227272727272727) internal successors, (98), 43 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 17:02:07,066 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 1170 transitions. [2022-01-31 17:02:07,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-01-31 17:02:07,066 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:07,066 INFO L514 BasicCegarLoop]: trace histogram [41, 41, 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 17:02:07,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-01-31 17:02:07,066 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:07,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:07,067 INFO L85 PathProgramCache]: Analyzing trace with hash 392880076, now seen corresponding path program 40 times [2022-01-31 17:02:07,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:07,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [679153918] [2022-01-31 17:02:07,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:07,069 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:07,069 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:07,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:07,070 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:07,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:07,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:07,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:07,713 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 17:02:07,713 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:07,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [679153918] [2022-01-31 17:02:07,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [679153918] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:07,714 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:07,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-01-31 17:02:07,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910718713] [2022-01-31 17:02:07,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:07,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-31 17:02:07,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:07,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-31 17:02:07,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 17:02:07,715 INFO L87 Difference]: Start difference. First operand 841 states and 1170 transitions. Second operand has 45 states, 45 states have (on average 2.2222222222222223) internal successors, (100), 44 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 17:02:09,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:09,868 INFO L93 Difference]: Finished difference Result 1631 states and 2306 transitions. [2022-01-31 17:02:09,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 17:02:09,868 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.2222222222222223) internal successors, (100), 44 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 107 [2022-01-31 17:02:09,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:09,871 INFO L225 Difference]: With dead ends: 1631 [2022-01-31 17:02:09,871 INFO L226 Difference]: Without dead ends: 879 [2022-01-31 17:02:09,873 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 17:02:09,873 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 3134 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1623 mSolverCounterSat, 618 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3137 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 2241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 618 IncrementalHoareTripleChecker+Valid, 1623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:09,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3137 Valid, 62 Invalid, 2241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [618 Valid, 1623 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 17:02:09,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2022-01-31 17:02:10,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 861. [2022-01-31 17:02:10,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 861 states, 772 states have (on average 1.3303108808290156) internal successors, (1027), 772 states have internal predecessors, (1027), 86 states have call successors, (86), 3 states have call predecessors, (86), 2 states have return successors, (85), 85 states have call predecessors, (85), 85 states have call successors, (85) [2022-01-31 17:02:10,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 1198 transitions. [2022-01-31 17:02:10,075 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 1198 transitions. Word has length 107 [2022-01-31 17:02:10,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:10,075 INFO L470 AbstractCegarLoop]: Abstraction has 861 states and 1198 transitions. [2022-01-31 17:02:10,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.2222222222222223) internal successors, (100), 44 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 17:02:10,076 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 1198 transitions. [2022-01-31 17:02:10,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-01-31 17:02:10,076 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:10,076 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 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 17:02:10,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-01-31 17:02:10,076 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:10,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:10,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1148179030, now seen corresponding path program 41 times [2022-01-31 17:02:10,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:10,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1186163666] [2022-01-31 17:02:10,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:10,079 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:10,079 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:10,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:10,081 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:10,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:10,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:10,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:10,810 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 17:02:10,810 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:10,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1186163666] [2022-01-31 17:02:10,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1186163666] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:10,810 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:10,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-01-31 17:02:10,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528029237] [2022-01-31 17:02:10,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:10,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-31 17:02:10,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:10,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-31 17:02:10,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 17:02:10,811 INFO L87 Difference]: Start difference. First operand 861 states and 1198 transitions. Second operand has 46 states, 46 states have (on average 2.217391304347826) internal successors, (102), 45 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 17:02:12,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:12,843 INFO L93 Difference]: Finished difference Result 1669 states and 2360 transitions. [2022-01-31 17:02:12,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 17:02:12,843 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.217391304347826) internal successors, (102), 45 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 109 [2022-01-31 17:02:12,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:12,846 INFO L225 Difference]: With dead ends: 1669 [2022-01-31 17:02:12,846 INFO L226 Difference]: Without dead ends: 899 [2022-01-31 17:02:12,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2970, Invalid=4862, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 17:02:12,848 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 3579 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1565 mSolverCounterSat, 698 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3582 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 2263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 698 IncrementalHoareTripleChecker+Valid, 1565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:12,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3582 Valid, 57 Invalid, 2263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [698 Valid, 1565 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:02:12,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899 states. [2022-01-31 17:02:13,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899 to 881. [2022-01-31 17:02:13,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 881 states, 790 states have (on average 1.330379746835443) internal successors, (1051), 790 states have internal predecessors, (1051), 88 states have call successors, (88), 3 states have call predecessors, (88), 2 states have return successors, (87), 87 states have call predecessors, (87), 87 states have call successors, (87) [2022-01-31 17:02:13,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 881 states to 881 states and 1226 transitions. [2022-01-31 17:02:13,049 INFO L78 Accepts]: Start accepts. Automaton has 881 states and 1226 transitions. Word has length 109 [2022-01-31 17:02:13,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:13,049 INFO L470 AbstractCegarLoop]: Abstraction has 881 states and 1226 transitions. [2022-01-31 17:02:13,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.217391304347826) internal successors, (102), 45 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 17:02:13,063 INFO L276 IsEmpty]: Start isEmpty. Operand 881 states and 1226 transitions. [2022-01-31 17:02:13,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-01-31 17:02:13,064 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:13,064 INFO L514 BasicCegarLoop]: trace histogram [43, 43, 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 17:02:13,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-01-31 17:02:13,064 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:13,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:13,064 INFO L85 PathProgramCache]: Analyzing trace with hash -342262776, now seen corresponding path program 42 times [2022-01-31 17:02:13,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:13,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1305688921] [2022-01-31 17:02:13,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:13,074 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:13,074 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:13,075 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:13,076 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:13,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:13,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:13,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:13,751 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 17:02:13,751 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:13,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1305688921] [2022-01-31 17:02:13,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1305688921] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:13,751 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:13,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-01-31 17:02:13,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557316135] [2022-01-31 17:02:13,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:13,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-31 17:02:13,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:13,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-31 17:02:13,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 17:02:13,752 INFO L87 Difference]: Start difference. First operand 881 states and 1226 transitions. Second operand has 47 states, 47 states have (on average 2.2127659574468086) internal successors, (104), 46 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 17:02:15,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:15,821 INFO L93 Difference]: Finished difference Result 1707 states and 2414 transitions. [2022-01-31 17:02:15,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-31 17:02:15,822 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.2127659574468086) internal successors, (104), 46 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 111 [2022-01-31 17:02:15,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:15,824 INFO L225 Difference]: With dead ends: 1707 [2022-01-31 17:02:15,824 INFO L226 Difference]: Without dead ends: 919 [2022-01-31 17:02:15,826 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 17:02:15,826 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 4059 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1603 mSolverCounterSat, 786 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4062 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 2389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 786 IncrementalHoareTripleChecker+Valid, 1603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:15,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4062 Valid, 66 Invalid, 2389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [786 Valid, 1603 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:02:15,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 919 states. [2022-01-31 17:02:16,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 919 to 901. [2022-01-31 17:02:16,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 901 states, 808 states have (on average 1.3304455445544554) internal successors, (1075), 808 states have internal predecessors, (1075), 90 states have call successors, (90), 3 states have call predecessors, (90), 2 states have return successors, (89), 89 states have call predecessors, (89), 89 states have call successors, (89) [2022-01-31 17:02:16,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 901 states to 901 states and 1254 transitions. [2022-01-31 17:02:16,023 INFO L78 Accepts]: Start accepts. Automaton has 901 states and 1254 transitions. Word has length 111 [2022-01-31 17:02:16,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:16,024 INFO L470 AbstractCegarLoop]: Abstraction has 901 states and 1254 transitions. [2022-01-31 17:02:16,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.2127659574468086) internal successors, (104), 46 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 17:02:16,024 INFO L276 IsEmpty]: Start isEmpty. Operand 901 states and 1254 transitions. [2022-01-31 17:02:16,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-01-31 17:02:16,024 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:16,024 INFO L514 BasicCegarLoop]: trace histogram [44, 44, 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 17:02:16,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-01-31 17:02:16,024 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:16,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:16,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1049144038, now seen corresponding path program 43 times [2022-01-31 17:02:16,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:16,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [351789830] [2022-01-31 17:02:16,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:16,027 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:16,027 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:16,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:16,028 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:16,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:16,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:16,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:16,814 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 17:02:16,814 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:16,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [351789830] [2022-01-31 17:02:16,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [351789830] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:16,815 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:16,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-01-31 17:02:16,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505385600] [2022-01-31 17:02:16,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:16,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-31 17:02:16,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:16,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-31 17:02:16,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 17:02:16,816 INFO L87 Difference]: Start difference. First operand 901 states and 1254 transitions. Second operand has 48 states, 48 states have (on average 2.2083333333333335) internal successors, (106), 47 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 17:02:19,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:19,207 INFO L93 Difference]: Finished difference Result 1745 states and 2468 transitions. [2022-01-31 17:02:19,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 17:02:19,208 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.2083333333333335) internal successors, (106), 47 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 113 [2022-01-31 17:02:19,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:19,226 INFO L225 Difference]: With dead ends: 1745 [2022-01-31 17:02:19,226 INFO L226 Difference]: Without dead ends: 939 [2022-01-31 17:02:19,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3243, Invalid=5313, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 17:02:19,228 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 3656 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1693 mSolverCounterSat, 707 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3659 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 2400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 707 IncrementalHoareTripleChecker+Valid, 1693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:19,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3659 Valid, 62 Invalid, 2400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [707 Valid, 1693 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 17:02:19,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2022-01-31 17:02:19,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 921. [2022-01-31 17:02:19,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 921 states, 826 states have (on average 1.3305084745762712) internal successors, (1099), 826 states have internal predecessors, (1099), 92 states have call successors, (92), 3 states have call predecessors, (92), 2 states have return successors, (91), 91 states have call predecessors, (91), 91 states have call successors, (91) [2022-01-31 17:02:19,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 921 states to 921 states and 1282 transitions. [2022-01-31 17:02:19,437 INFO L78 Accepts]: Start accepts. Automaton has 921 states and 1282 transitions. Word has length 113 [2022-01-31 17:02:19,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:19,437 INFO L470 AbstractCegarLoop]: Abstraction has 921 states and 1282 transitions. [2022-01-31 17:02:19,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.2083333333333335) internal successors, (106), 47 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 17:02:19,437 INFO L276 IsEmpty]: Start isEmpty. Operand 921 states and 1282 transitions. [2022-01-31 17:02:19,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-01-31 17:02:19,438 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:19,438 INFO L514 BasicCegarLoop]: trace histogram [45, 45, 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 17:02:19,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-01-31 17:02:19,438 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:19,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:19,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1838704060, now seen corresponding path program 44 times [2022-01-31 17:02:19,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:19,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [153114943] [2022-01-31 17:02:19,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:19,440 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:19,440 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:19,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:19,449 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:19,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:20,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:20,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:20,183 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 17:02:20,183 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:20,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [153114943] [2022-01-31 17:02:20,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [153114943] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:20,183 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:20,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-01-31 17:02:20,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432830716] [2022-01-31 17:02:20,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:20,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-31 17:02:20,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:20,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-31 17:02:20,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 17:02:20,184 INFO L87 Difference]: Start difference. First operand 921 states and 1282 transitions. Second operand has 49 states, 49 states have (on average 2.204081632653061) internal successors, (108), 48 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 17:02:22,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:22,313 INFO L93 Difference]: Finished difference Result 1783 states and 2522 transitions. [2022-01-31 17:02:22,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 17:02:22,313 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.204081632653061) internal successors, (108), 48 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 115 [2022-01-31 17:02:22,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:22,322 INFO L225 Difference]: With dead ends: 1783 [2022-01-31 17:02:22,322 INFO L226 Difference]: Without dead ends: 959 [2022-01-31 17:02:22,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3384, Invalid=5546, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 17:02:22,324 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 3979 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1637 mSolverCounterSat, 769 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3982 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 2406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 769 IncrementalHoareTripleChecker+Valid, 1637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:22,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3982 Valid, 65 Invalid, 2406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [769 Valid, 1637 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:02:22,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2022-01-31 17:02:22,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 941. [2022-01-31 17:02:22,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 941 states, 844 states have (on average 1.330568720379147) internal successors, (1123), 844 states have internal predecessors, (1123), 94 states have call successors, (94), 3 states have call predecessors, (94), 2 states have return successors, (93), 93 states have call predecessors, (93), 93 states have call successors, (93) [2022-01-31 17:02:22,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 941 states to 941 states and 1310 transitions. [2022-01-31 17:02:22,569 INFO L78 Accepts]: Start accepts. Automaton has 941 states and 1310 transitions. Word has length 115 [2022-01-31 17:02:22,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:22,569 INFO L470 AbstractCegarLoop]: Abstraction has 941 states and 1310 transitions. [2022-01-31 17:02:22,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.204081632653061) internal successors, (108), 48 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 17:02:22,569 INFO L276 IsEmpty]: Start isEmpty. Operand 941 states and 1310 transitions. [2022-01-31 17:02:22,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-01-31 17:02:22,570 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:22,570 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 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 17:02:22,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-01-31 17:02:22,570 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:22,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:22,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1783114274, now seen corresponding path program 45 times [2022-01-31 17:02:22,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:22,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1090770017] [2022-01-31 17:02:22,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:22,580 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:22,580 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:22,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:22,582 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:22,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:23,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:23,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:23,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:02:23,401 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:23,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1090770017] [2022-01-31 17:02:23,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1090770017] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:23,401 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:23,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-01-31 17:02:23,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688034194] [2022-01-31 17:02:23,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:23,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 17:02:23,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:23,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 17:02:23,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 17:02:23,402 INFO L87 Difference]: Start difference. First operand 941 states and 1310 transitions. Second operand has 50 states, 50 states have (on average 2.2) internal successors, (110), 49 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 17:02:25,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:25,792 INFO L93 Difference]: Finished difference Result 1821 states and 2576 transitions. [2022-01-31 17:02:25,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-31 17:02:25,792 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.2) internal successors, (110), 49 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 117 [2022-01-31 17:02:25,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:25,795 INFO L225 Difference]: With dead ends: 1821 [2022-01-31 17:02:25,795 INFO L226 Difference]: Without dead ends: 979 [2022-01-31 17:02:25,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3528, Invalid=5784, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 17:02:25,797 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 3737 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1763 mSolverCounterSat, 728 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3740 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 2491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 728 IncrementalHoareTripleChecker+Valid, 1763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:25,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3740 Valid, 69 Invalid, 2491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [728 Valid, 1763 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 17:02:25,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 979 states. [2022-01-31 17:02:26,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 979 to 961. [2022-01-31 17:02:26,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 961 states, 862 states have (on average 1.3306264501160092) internal successors, (1147), 862 states have internal predecessors, (1147), 96 states have call successors, (96), 3 states have call predecessors, (96), 2 states have return successors, (95), 95 states have call predecessors, (95), 95 states have call successors, (95) [2022-01-31 17:02:26,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 961 states to 961 states and 1338 transitions. [2022-01-31 17:02:26,036 INFO L78 Accepts]: Start accepts. Automaton has 961 states and 1338 transitions. Word has length 117 [2022-01-31 17:02:26,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:26,036 INFO L470 AbstractCegarLoop]: Abstraction has 961 states and 1338 transitions. [2022-01-31 17:02:26,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.2) internal successors, (110), 49 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 17:02:26,036 INFO L276 IsEmpty]: Start isEmpty. Operand 961 states and 1338 transitions. [2022-01-31 17:02:26,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-01-31 17:02:26,036 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:26,036 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 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 17:02:26,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-01-31 17:02:26,037 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:26,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:26,037 INFO L85 PathProgramCache]: Analyzing trace with hash -867943808, now seen corresponding path program 46 times [2022-01-31 17:02:26,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:26,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [782443907] [2022-01-31 17:02:26,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:26,038 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:26,038 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:26,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:26,040 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:26,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:26,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:26,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:26,775 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 17:02:26,775 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:26,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [782443907] [2022-01-31 17:02:26,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [782443907] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:26,775 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:26,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-01-31 17:02:26,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919850622] [2022-01-31 17:02:26,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:26,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-31 17:02:26,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:26,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-31 17:02:26,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 17:02:26,776 INFO L87 Difference]: Start difference. First operand 961 states and 1338 transitions. Second operand has 51 states, 51 states have (on average 2.196078431372549) internal successors, (112), 50 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 17:02:29,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:29,465 INFO L93 Difference]: Finished difference Result 1859 states and 2630 transitions. [2022-01-31 17:02:29,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 17:02:29,465 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.196078431372549) internal successors, (112), 50 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 119 [2022-01-31 17:02:29,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:29,467 INFO L225 Difference]: With dead ends: 1859 [2022-01-31 17:02:29,467 INFO L226 Difference]: Without dead ends: 999 [2022-01-31 17:02:29,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3675, Invalid=6027, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 17:02:29,469 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 3959 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1769 mSolverCounterSat, 768 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3962 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 2537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 768 IncrementalHoareTripleChecker+Valid, 1769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:29,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3962 Valid, 62 Invalid, 2537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [768 Valid, 1769 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 17:02:29,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 999 states. [2022-01-31 17:02:29,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 999 to 981. [2022-01-31 17:02:29,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 981 states, 880 states have (on average 1.330681818181818) internal successors, (1171), 880 states have internal predecessors, (1171), 98 states have call successors, (98), 3 states have call predecessors, (98), 2 states have return successors, (97), 97 states have call predecessors, (97), 97 states have call successors, (97) [2022-01-31 17:02:29,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 981 states to 981 states and 1366 transitions. [2022-01-31 17:02:29,701 INFO L78 Accepts]: Start accepts. Automaton has 981 states and 1366 transitions. Word has length 119 [2022-01-31 17:02:29,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:29,702 INFO L470 AbstractCegarLoop]: Abstraction has 981 states and 1366 transitions. [2022-01-31 17:02:29,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.196078431372549) internal successors, (112), 50 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 17:02:29,702 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states and 1366 transitions. [2022-01-31 17:02:29,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-01-31 17:02:29,702 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:29,702 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 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 17:02:29,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-01-31 17:02:29,702 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:29,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:29,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1619154082, now seen corresponding path program 47 times [2022-01-31 17:02:29,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:29,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [184215955] [2022-01-31 17:02:29,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:29,704 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:29,704 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:29,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:29,706 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:29,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:30,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:30,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:30,536 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 17:02:30,536 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:30,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [184215955] [2022-01-31 17:02:30,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [184215955] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:30,536 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:30,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-01-31 17:02:30,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385520306] [2022-01-31 17:02:30,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:30,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-01-31 17:02:30,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:30,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-01-31 17:02:30,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 17:02:30,537 INFO L87 Difference]: Start difference. First operand 981 states and 1366 transitions. Second operand has 52 states, 52 states have (on average 2.1923076923076925) internal successors, (114), 51 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 17:02:33,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:33,220 INFO L93 Difference]: Finished difference Result 1897 states and 2684 transitions. [2022-01-31 17:02:33,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-31 17:02:33,220 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.1923076923076925) internal successors, (114), 51 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 121 [2022-01-31 17:02:33,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:33,222 INFO L225 Difference]: With dead ends: 1897 [2022-01-31 17:02:33,222 INFO L226 Difference]: Without dead ends: 1019 [2022-01-31 17:02:33,224 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 17:02:33,224 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 4803 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1749 mSolverCounterSat, 919 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4806 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 2668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 919 IncrementalHoareTripleChecker+Valid, 1749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:33,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4806 Valid, 49 Invalid, 2668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [919 Valid, 1749 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 17:02:33,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1019 states. [2022-01-31 17:02:33,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1019 to 1001. [2022-01-31 17:02:33,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1001 states, 898 states have (on average 1.3307349665924275) internal successors, (1195), 898 states have internal predecessors, (1195), 100 states have call successors, (100), 3 states have call predecessors, (100), 2 states have return successors, (99), 99 states have call predecessors, (99), 99 states have call successors, (99) [2022-01-31 17:02:33,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1001 states to 1001 states and 1394 transitions. [2022-01-31 17:02:33,498 INFO L78 Accepts]: Start accepts. Automaton has 1001 states and 1394 transitions. Word has length 121 [2022-01-31 17:02:33,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:33,498 INFO L470 AbstractCegarLoop]: Abstraction has 1001 states and 1394 transitions. [2022-01-31 17:02:33,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.1923076923076925) internal successors, (114), 51 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 17:02:33,498 INFO L276 IsEmpty]: Start isEmpty. Operand 1001 states and 1394 transitions. [2022-01-31 17:02:33,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-01-31 17:02:33,499 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:33,499 INFO L514 BasicCegarLoop]: trace histogram [49, 49, 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 17:02:33,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-01-31 17:02:33,499 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:33,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:33,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1977721668, now seen corresponding path program 48 times [2022-01-31 17:02:33,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:33,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1877867939] [2022-01-31 17:02:33,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:33,501 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:33,501 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:33,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:33,502 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:33,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:34,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:34,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:34,279 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 17:02:34,279 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:34,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1877867939] [2022-01-31 17:02:34,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1877867939] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:34,279 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:34,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-01-31 17:02:34,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757323617] [2022-01-31 17:02:34,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:34,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-31 17:02:34,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:34,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-31 17:02:34,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 17:02:34,281 INFO L87 Difference]: Start difference. First operand 1001 states and 1394 transitions. Second operand has 53 states, 53 states have (on average 2.188679245283019) internal successors, (116), 52 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 17:02:36,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:36,833 INFO L93 Difference]: Finished difference Result 1935 states and 2738 transitions. [2022-01-31 17:02:36,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-31 17:02:36,834 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.188679245283019) internal successors, (116), 52 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 123 [2022-01-31 17:02:36,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:36,836 INFO L225 Difference]: With dead ends: 1935 [2022-01-31 17:02:36,836 INFO L226 Difference]: Without dead ends: 1039 [2022-01-31 17:02:36,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3978, Invalid=6528, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 17:02:36,838 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 5429 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1821 mSolverCounterSat, 1039 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5432 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 2860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1039 IncrementalHoareTripleChecker+Valid, 1821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:36,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5432 Valid, 59 Invalid, 2860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1039 Valid, 1821 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:02:36,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1039 states. [2022-01-31 17:02:37,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1039 to 1021. [2022-01-31 17:02:37,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1021 states, 916 states have (on average 1.3307860262008733) internal successors, (1219), 916 states have internal predecessors, (1219), 102 states have call successors, (102), 3 states have call predecessors, (102), 2 states have return successors, (101), 101 states have call predecessors, (101), 101 states have call successors, (101) [2022-01-31 17:02:37,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 1422 transitions. [2022-01-31 17:02:37,103 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 1422 transitions. Word has length 123 [2022-01-31 17:02:37,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:37,103 INFO L470 AbstractCegarLoop]: Abstraction has 1021 states and 1422 transitions. [2022-01-31 17:02:37,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.188679245283019) internal successors, (116), 52 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 17:02:37,104 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 1422 transitions. [2022-01-31 17:02:37,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-01-31 17:02:37,104 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:37,104 INFO L514 BasicCegarLoop]: trace histogram [50, 50, 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 17:02:37,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-01-31 17:02:37,104 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:37,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:37,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1331179162, now seen corresponding path program 49 times [2022-01-31 17:02:37,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:37,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1211134374] [2022-01-31 17:02:37,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:37,106 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:37,106 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:37,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:37,108 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:37,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:37,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:37,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:37,999 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 17:02:38,000 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:38,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1211134374] [2022-01-31 17:02:38,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1211134374] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:38,000 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:38,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-01-31 17:02:38,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272840906] [2022-01-31 17:02:38,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:38,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-01-31 17:02:38,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:38,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-01-31 17:02:38,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 17:02:38,001 INFO L87 Difference]: Start difference. First operand 1021 states and 1422 transitions. Second operand has 54 states, 54 states have (on average 2.185185185185185) internal successors, (118), 53 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 17:02:40,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:40,747 INFO L93 Difference]: Finished difference Result 1973 states and 2792 transitions. [2022-01-31 17:02:40,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-31 17:02:40,747 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.185185185185185) internal successors, (118), 53 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 125 [2022-01-31 17:02:40,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:40,749 INFO L225 Difference]: With dead ends: 1973 [2022-01-31 17:02:40,749 INFO L226 Difference]: Without dead ends: 1059 [2022-01-31 17:02:40,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1325 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=4134, Invalid=6786, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 17:02:40,751 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 4397 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1857 mSolverCounterSat, 851 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4400 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 2708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 851 IncrementalHoareTripleChecker+Valid, 1857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:40,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4400 Valid, 69 Invalid, 2708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [851 Valid, 1857 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 17:02:40,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1059 states. [2022-01-31 17:02:41,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1059 to 1041. [2022-01-31 17:02:41,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1041 states, 934 states have (on average 1.3308351177730193) internal successors, (1243), 934 states have internal predecessors, (1243), 104 states have call successors, (104), 3 states have call predecessors, (104), 2 states have return successors, (103), 103 states have call predecessors, (103), 103 states have call successors, (103) [2022-01-31 17:02:41,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1041 states to 1041 states and 1450 transitions. [2022-01-31 17:02:41,027 INFO L78 Accepts]: Start accepts. Automaton has 1041 states and 1450 transitions. Word has length 125 [2022-01-31 17:02:41,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:41,027 INFO L470 AbstractCegarLoop]: Abstraction has 1041 states and 1450 transitions. [2022-01-31 17:02:41,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.185185185185185) internal successors, (118), 53 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 17:02:41,027 INFO L276 IsEmpty]: Start isEmpty. Operand 1041 states and 1450 transitions. [2022-01-31 17:02:41,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-01-31 17:02:41,027 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:41,027 INFO L514 BasicCegarLoop]: trace histogram [51, 51, 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 17:02:41,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-01-31 17:02:41,028 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:41,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:41,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1385889544, now seen corresponding path program 50 times [2022-01-31 17:02:41,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:41,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [160649720] [2022-01-31 17:02:41,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:41,029 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:41,029 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:41,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:41,031 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:41,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:41,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:41,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:41,833 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 17:02:41,833 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:41,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [160649720] [2022-01-31 17:02:41,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [160649720] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:41,834 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:41,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-01-31 17:02:41,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107712754] [2022-01-31 17:02:41,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:41,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-01-31 17:02:41,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:41,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-01-31 17:02:41,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 17:02:41,835 INFO L87 Difference]: Start difference. First operand 1041 states and 1450 transitions. Second operand has 55 states, 55 states have (on average 2.1818181818181817) internal successors, (120), 54 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 17:02:44,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:44,947 INFO L93 Difference]: Finished difference Result 2011 states and 2846 transitions. [2022-01-31 17:02:44,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-31 17:02:44,947 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.1818181818181817) internal successors, (120), 54 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 127 [2022-01-31 17:02:44,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:44,949 INFO L225 Difference]: With dead ends: 2011 [2022-01-31 17:02:44,949 INFO L226 Difference]: Without dead ends: 1079 [2022-01-31 17:02:44,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=4293, Invalid=7049, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 17:02:44,951 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 4533 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1871 mSolverCounterSat, 877 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4536 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 2748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 877 IncrementalHoareTripleChecker+Valid, 1871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:44,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4536 Valid, 57 Invalid, 2748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [877 Valid, 1871 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 17:02:44,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1079 states. [2022-01-31 17:02:45,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1079 to 1061. [2022-01-31 17:02:45,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1061 states, 952 states have (on average 1.3308823529411764) internal successors, (1267), 952 states have internal predecessors, (1267), 106 states have call successors, (106), 3 states have call predecessors, (106), 2 states have return successors, (105), 105 states have call predecessors, (105), 105 states have call successors, (105) [2022-01-31 17:02:45,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1061 states to 1061 states and 1478 transitions. [2022-01-31 17:02:45,248 INFO L78 Accepts]: Start accepts. Automaton has 1061 states and 1478 transitions. Word has length 127 [2022-01-31 17:02:45,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:45,248 INFO L470 AbstractCegarLoop]: Abstraction has 1061 states and 1478 transitions. [2022-01-31 17:02:45,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.1818181818181817) internal successors, (120), 54 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 17:02:45,248 INFO L276 IsEmpty]: Start isEmpty. Operand 1061 states and 1478 transitions. [2022-01-31 17:02:45,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-01-31 17:02:45,249 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:45,249 INFO L514 BasicCegarLoop]: trace histogram [52, 52, 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 17:02:45,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-01-31 17:02:45,249 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:45,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:45,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1148800042, now seen corresponding path program 51 times [2022-01-31 17:02:45,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:45,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1755225947] [2022-01-31 17:02:45,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:45,250 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:45,251 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:45,251 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:45,253 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:45,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:46,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:46,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:46,212 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 17:02:46,212 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:46,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1755225947] [2022-01-31 17:02:46,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1755225947] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:46,212 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:46,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-01-31 17:02:46,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059692482] [2022-01-31 17:02:46,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:46,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-31 17:02:46,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:46,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-31 17:02:46,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 17:02:46,213 INFO L87 Difference]: Start difference. First operand 1061 states and 1478 transitions. Second operand has 56 states, 56 states have (on average 2.1785714285714284) internal successors, (122), 55 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 17:02:49,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:49,305 INFO L93 Difference]: Finished difference Result 2049 states and 2900 transitions. [2022-01-31 17:02:49,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-31 17:02:49,306 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.1785714285714284) internal successors, (122), 55 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 129 [2022-01-31 17:02:49,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:49,308 INFO L225 Difference]: With dead ends: 2049 [2022-01-31 17:02:49,308 INFO L226 Difference]: Without dead ends: 1099 [2022-01-31 17:02:49,310 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 17:02:49,310 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 4266 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 2055 mSolverCounterSat, 830 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4269 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 2885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 830 IncrementalHoareTripleChecker+Valid, 2055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:49,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4269 Valid, 70 Invalid, 2885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [830 Valid, 2055 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 17:02:49,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2022-01-31 17:02:49,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 1081. [2022-01-31 17:02:49,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1081 states, 970 states have (on average 1.3309278350515463) internal successors, (1291), 970 states have internal predecessors, (1291), 108 states have call successors, (108), 3 states have call predecessors, (108), 2 states have return successors, (107), 107 states have call predecessors, (107), 107 states have call successors, (107) [2022-01-31 17:02:49,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1081 states to 1081 states and 1506 transitions. [2022-01-31 17:02:49,604 INFO L78 Accepts]: Start accepts. Automaton has 1081 states and 1506 transitions. Word has length 129 [2022-01-31 17:02:49,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:49,605 INFO L470 AbstractCegarLoop]: Abstraction has 1081 states and 1506 transitions. [2022-01-31 17:02:49,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.1785714285714284) internal successors, (122), 55 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 17:02:49,605 INFO L276 IsEmpty]: Start isEmpty. Operand 1081 states and 1506 transitions. [2022-01-31 17:02:49,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-01-31 17:02:49,605 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:49,605 INFO L514 BasicCegarLoop]: trace histogram [53, 53, 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 17:02:49,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-01-31 17:02:49,606 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:49,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:49,606 INFO L85 PathProgramCache]: Analyzing trace with hash -939055308, now seen corresponding path program 52 times [2022-01-31 17:02:49,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:49,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [228980258] [2022-01-31 17:02:49,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:49,609 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:49,609 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:49,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:49,612 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:49,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:50,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:50,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:50,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:02:50,677 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:50,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [228980258] [2022-01-31 17:02:50,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [228980258] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:50,677 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:50,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-01-31 17:02:50,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999931637] [2022-01-31 17:02:50,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:50,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-01-31 17:02:50,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:50,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-01-31 17:02:50,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 17:02:50,678 INFO L87 Difference]: Start difference. First operand 1081 states and 1506 transitions. Second operand has 57 states, 57 states have (on average 2.175438596491228) internal successors, (124), 56 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 17:02:53,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:53,842 INFO L93 Difference]: Finished difference Result 2087 states and 2954 transitions. [2022-01-31 17:02:53,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 17:02:53,842 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.175438596491228) internal successors, (124), 56 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 131 [2022-01-31 17:02:53,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:53,844 INFO L225 Difference]: With dead ends: 2087 [2022-01-31 17:02:53,844 INFO L226 Difference]: Without dead ends: 1119 [2022-01-31 17:02:53,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1484 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=4620, Invalid=7590, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 17:02:53,847 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 3856 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 2231 mSolverCounterSat, 758 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3859 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 2989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 758 IncrementalHoareTripleChecker+Valid, 2231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:53,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3859 Valid, 92 Invalid, 2989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [758 Valid, 2231 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 17:02:53,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2022-01-31 17:02:54,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 1101. [2022-01-31 17:02:54,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1101 states, 988 states have (on average 1.3309716599190284) internal successors, (1315), 988 states have internal predecessors, (1315), 110 states have call successors, (110), 3 states have call predecessors, (110), 2 states have return successors, (109), 109 states have call predecessors, (109), 109 states have call successors, (109) [2022-01-31 17:02:54,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1101 states to 1101 states and 1534 transitions. [2022-01-31 17:02:54,153 INFO L78 Accepts]: Start accepts. Automaton has 1101 states and 1534 transitions. Word has length 131 [2022-01-31 17:02:54,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:54,153 INFO L470 AbstractCegarLoop]: Abstraction has 1101 states and 1534 transitions. [2022-01-31 17:02:54,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.175438596491228) internal successors, (124), 56 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 17:02:54,153 INFO L276 IsEmpty]: Start isEmpty. Operand 1101 states and 1534 transitions. [2022-01-31 17:02:54,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-01-31 17:02:54,154 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:54,154 INFO L514 BasicCegarLoop]: trace histogram [54, 54, 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 17:02:54,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-01-31 17:02:54,154 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:54,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:54,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1237828846, now seen corresponding path program 53 times [2022-01-31 17:02:54,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:54,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2143577651] [2022-01-31 17:02:54,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:54,156 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:54,156 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:54,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:54,158 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:54,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:55,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:55,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:55,191 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 17:02:55,191 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:55,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2143577651] [2022-01-31 17:02:55,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2143577651] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:55,191 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:55,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-01-31 17:02:55,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825376762] [2022-01-31 17:02:55,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:55,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-01-31 17:02:55,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:55,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-01-31 17:02:55,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 17:02:55,193 INFO L87 Difference]: Start difference. First operand 1101 states and 1534 transitions. Second operand has 58 states, 58 states have (on average 2.1724137931034484) internal successors, (126), 57 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 17:02:58,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:58,083 INFO L93 Difference]: Finished difference Result 2125 states and 3008 transitions. [2022-01-31 17:02:58,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-31 17:02:58,083 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.1724137931034484) internal successors, (126), 57 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 133 [2022-01-31 17:02:58,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:58,085 INFO L225 Difference]: With dead ends: 2125 [2022-01-31 17:02:58,085 INFO L226 Difference]: Without dead ends: 1139 [2022-01-31 17:02:58,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4788, Invalid=7868, Unknown=0, NotChecked=0, Total=12656 [2022-01-31 17:02:58,087 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 4763 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 2051 mSolverCounterSat, 920 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4766 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 2971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 920 IncrementalHoareTripleChecker+Valid, 2051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:58,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4766 Valid, 69 Invalid, 2971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [920 Valid, 2051 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 17:02:58,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2022-01-31 17:02:58,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 1121. [2022-01-31 17:02:58,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1121 states, 1006 states have (on average 1.331013916500994) internal successors, (1339), 1006 states have internal predecessors, (1339), 112 states have call successors, (112), 3 states have call predecessors, (112), 2 states have return successors, (111), 111 states have call predecessors, (111), 111 states have call successors, (111) [2022-01-31 17:02:58,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1121 states to 1121 states and 1562 transitions. [2022-01-31 17:02:58,515 INFO L78 Accepts]: Start accepts. Automaton has 1121 states and 1562 transitions. Word has length 133 [2022-01-31 17:02:58,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:58,515 INFO L470 AbstractCegarLoop]: Abstraction has 1121 states and 1562 transitions. [2022-01-31 17:02:58,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.1724137931034484) internal successors, (126), 57 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 17:02:58,515 INFO L276 IsEmpty]: Start isEmpty. Operand 1121 states and 1562 transitions. [2022-01-31 17:02:58,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-01-31 17:02:58,516 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:58,516 INFO L514 BasicCegarLoop]: trace histogram [55, 55, 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 17:02:58,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-01-31 17:02:58,516 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:58,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:58,516 INFO L85 PathProgramCache]: Analyzing trace with hash -596390032, now seen corresponding path program 54 times [2022-01-31 17:02:58,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:58,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [936170193] [2022-01-31 17:02:58,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:58,518 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:58,518 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:58,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:58,520 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:58,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:59,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:59,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:59,546 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 17:02:59,546 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:59,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [936170193] [2022-01-31 17:02:59,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [936170193] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:59,547 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:59,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-01-31 17:02:59,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9627822] [2022-01-31 17:02:59,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:59,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-01-31 17:02:59,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:59,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-01-31 17:02:59,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 17:02:59,548 INFO L87 Difference]: Start difference. First operand 1121 states and 1562 transitions. Second operand has 59 states, 59 states have (on average 2.169491525423729) internal successors, (128), 58 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 17:03:03,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:03:03,259 INFO L93 Difference]: Finished difference Result 2163 states and 3062 transitions. [2022-01-31 17:03:03,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-31 17:03:03,259 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.169491525423729) internal successors, (128), 58 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 135 [2022-01-31 17:03:03,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:03:03,261 INFO L225 Difference]: With dead ends: 2163 [2022-01-31 17:03:03,262 INFO L226 Difference]: Without dead ends: 1159 [2022-01-31 17:03:03,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=4959, Invalid=8151, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 17:03:03,265 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 4672 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 2105 mSolverCounterSat, 909 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4675 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 3014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 909 IncrementalHoareTripleChecker+Valid, 2105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:03:03,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4675 Valid, 64 Invalid, 3014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [909 Valid, 2105 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 17:03:03,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2022-01-31 17:03:03,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 1141. [2022-01-31 17:03:03,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1141 states, 1024 states have (on average 1.3310546875) internal successors, (1363), 1024 states have internal predecessors, (1363), 114 states have call successors, (114), 3 states have call predecessors, (114), 2 states have return successors, (113), 113 states have call predecessors, (113), 113 states have call successors, (113) [2022-01-31 17:03:03,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 1590 transitions. [2022-01-31 17:03:03,605 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 1590 transitions. Word has length 135 [2022-01-31 17:03:03,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:03:03,605 INFO L470 AbstractCegarLoop]: Abstraction has 1141 states and 1590 transitions. [2022-01-31 17:03:03,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.169491525423729) internal successors, (128), 58 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 17:03:03,605 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 1590 transitions. [2022-01-31 17:03:03,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-01-31 17:03:03,605 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:03:03,606 INFO L514 BasicCegarLoop]: trace histogram [56, 56, 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 17:03:03,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-01-31 17:03:03,606 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:03:03,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:03:03,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1645986894, now seen corresponding path program 55 times [2022-01-31 17:03:03,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:03:03,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [262667768] [2022-01-31 17:03:03,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:03:03,613 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:03:03,613 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:03:03,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:03:03,619 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:03:03,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:04,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:03:04,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:04,628 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 17:03:04,628 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:03:04,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [262667768] [2022-01-31 17:03:04,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [262667768] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:03:04,629 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:03:04,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-01-31 17:03:04,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183728292] [2022-01-31 17:03:04,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:03:04,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-01-31 17:03:04,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:03:04,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-01-31 17:03:04,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 17:03:04,630 INFO L87 Difference]: Start difference. First operand 1141 states and 1590 transitions. Second operand has 60 states, 60 states have (on average 2.1666666666666665) internal successors, (130), 59 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 17:03:07,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:03:07,694 INFO L93 Difference]: Finished difference Result 2201 states and 3116 transitions. [2022-01-31 17:03:07,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-31 17:03:07,695 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.1666666666666665) internal successors, (130), 59 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 137 [2022-01-31 17:03:07,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:03:07,697 INFO L225 Difference]: With dead ends: 2201 [2022-01-31 17:03:07,697 INFO L226 Difference]: Without dead ends: 1179 [2022-01-31 17:03:07,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1652 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=5133, Invalid=8439, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 17:03:07,700 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 4905 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 2099 mSolverCounterSat, 950 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4908 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 3049 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 950 IncrementalHoareTripleChecker+Valid, 2099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:03:07,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4908 Valid, 69 Invalid, 3049 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [950 Valid, 2099 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 17:03:07,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1179 states. [2022-01-31 17:03:08,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1179 to 1161. [2022-01-31 17:03:08,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1161 states, 1042 states have (on average 1.3310940499040307) internal successors, (1387), 1042 states have internal predecessors, (1387), 116 states have call successors, (116), 3 states have call predecessors, (116), 2 states have return successors, (115), 115 states have call predecessors, (115), 115 states have call successors, (115) [2022-01-31 17:03:08,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1161 states to 1161 states and 1618 transitions. [2022-01-31 17:03:08,039 INFO L78 Accepts]: Start accepts. Automaton has 1161 states and 1618 transitions. Word has length 137 [2022-01-31 17:03:08,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:03:08,039 INFO L470 AbstractCegarLoop]: Abstraction has 1161 states and 1618 transitions. [2022-01-31 17:03:08,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.1666666666666665) internal successors, (130), 59 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 17:03:08,039 INFO L276 IsEmpty]: Start isEmpty. Operand 1161 states and 1618 transitions. [2022-01-31 17:03:08,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-01-31 17:03:08,040 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:03:08,040 INFO L514 BasicCegarLoop]: trace histogram [57, 57, 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 17:03:08,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-01-31 17:03:08,040 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:03:08,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:03:08,040 INFO L85 PathProgramCache]: Analyzing trace with hash 496630188, now seen corresponding path program 56 times [2022-01-31 17:03:08,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:03:08,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1469934177] [2022-01-31 17:03:08,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:03:08,041 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:03:08,042 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:03:08,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:03:08,044 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:03:08,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:09,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:03:09,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:09,171 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 17:03:09,171 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:03:09,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1469934177] [2022-01-31 17:03:09,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1469934177] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:03:09,171 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:03:09,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-01-31 17:03:09,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873471084] [2022-01-31 17:03:09,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:03:09,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-01-31 17:03:09,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:03:09,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-01-31 17:03:09,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 17:03:09,173 INFO L87 Difference]: Start difference. First operand 1161 states and 1618 transitions. Second operand has 61 states, 61 states have (on average 2.1639344262295084) internal successors, (132), 60 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 17:03:12,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:03:12,611 INFO L93 Difference]: Finished difference Result 2239 states and 3170 transitions. [2022-01-31 17:03:12,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-31 17:03:12,612 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.1639344262295084) internal successors, (132), 60 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 139 [2022-01-31 17:03:12,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:03:12,614 INFO L225 Difference]: With dead ends: 2239 [2022-01-31 17:03:12,614 INFO L226 Difference]: Without dead ends: 1199 [2022-01-31 17:03:12,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1710 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=5310, Invalid=8732, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 17:03:12,616 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 5088 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 2127 mSolverCounterSat, 980 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5091 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 3107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 980 IncrementalHoareTripleChecker+Valid, 2127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:03:12,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5091 Valid, 76 Invalid, 3107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [980 Valid, 2127 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 17:03:12,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1199 states. [2022-01-31 17:03:12,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1199 to 1181. [2022-01-31 17:03:12,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1181 states, 1060 states have (on average 1.3311320754716982) internal successors, (1411), 1060 states have internal predecessors, (1411), 118 states have call successors, (118), 3 states have call predecessors, (118), 2 states have return successors, (117), 117 states have call predecessors, (117), 117 states have call successors, (117) [2022-01-31 17:03:12,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1181 states to 1181 states and 1646 transitions. [2022-01-31 17:03:12,964 INFO L78 Accepts]: Start accepts. Automaton has 1181 states and 1646 transitions. Word has length 139 [2022-01-31 17:03:12,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:03:12,964 INFO L470 AbstractCegarLoop]: Abstraction has 1181 states and 1646 transitions. [2022-01-31 17:03:12,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.1639344262295084) internal successors, (132), 60 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 17:03:12,964 INFO L276 IsEmpty]: Start isEmpty. Operand 1181 states and 1646 transitions. [2022-01-31 17:03:12,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-01-31 17:03:12,965 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:03:12,965 INFO L514 BasicCegarLoop]: trace histogram [58, 58, 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 17:03:12,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-01-31 17:03:12,965 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:03:12,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:03:12,965 INFO L85 PathProgramCache]: Analyzing trace with hash -228569206, now seen corresponding path program 57 times [2022-01-31 17:03:12,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:03:12,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [549377406] [2022-01-31 17:03:12,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:03:12,966 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:03:12,966 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:03:12,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:03:12,969 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:03:12,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:14,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:03:14,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:14,171 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 17:03:14,171 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:03:14,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [549377406] [2022-01-31 17:03:14,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [549377406] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:03:14,171 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:03:14,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-01-31 17:03:14,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095596930] [2022-01-31 17:03:14,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:03:14,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-01-31 17:03:14,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:03:14,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-01-31 17:03:14,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 17:03:14,173 INFO L87 Difference]: Start difference. First operand 1181 states and 1646 transitions. Second operand has 62 states, 62 states have (on average 2.161290322580645) internal successors, (134), 61 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 17:03:17,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:03:17,770 INFO L93 Difference]: Finished difference Result 2277 states and 3224 transitions. [2022-01-31 17:03:17,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-31 17:03:17,770 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.161290322580645) internal successors, (134), 61 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 141 [2022-01-31 17:03:17,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:03:17,774 INFO L225 Difference]: With dead ends: 2277 [2022-01-31 17:03:17,774 INFO L226 Difference]: Without dead ends: 1219 [2022-01-31 17:03:17,776 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 17:03:17,780 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 5341 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 2145 mSolverCounterSat, 1028 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5344 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 3173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1028 IncrementalHoareTripleChecker+Valid, 2145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:03:17,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5344 Valid, 66 Invalid, 3173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1028 Valid, 2145 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 17:03:17,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1219 states. [2022-01-31 17:03:18,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1219 to 1201. [2022-01-31 17:03:18,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1201 states, 1078 states have (on average 1.3311688311688312) internal successors, (1435), 1078 states have internal predecessors, (1435), 120 states have call successors, (120), 3 states have call predecessors, (120), 2 states have return successors, (119), 119 states have call predecessors, (119), 119 states have call successors, (119) [2022-01-31 17:03:18,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1201 states to 1201 states and 1674 transitions. [2022-01-31 17:03:18,177 INFO L78 Accepts]: Start accepts. Automaton has 1201 states and 1674 transitions. Word has length 141 [2022-01-31 17:03:18,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:03:18,177 INFO L470 AbstractCegarLoop]: Abstraction has 1201 states and 1674 transitions. [2022-01-31 17:03:18,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.161290322580645) internal successors, (134), 61 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 17:03:18,177 INFO L276 IsEmpty]: Start isEmpty. Operand 1201 states and 1674 transitions. [2022-01-31 17:03:18,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-01-31 17:03:18,187 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:03:18,187 INFO L514 BasicCegarLoop]: trace histogram [59, 59, 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 17:03:18,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-01-31 17:03:18,188 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:03:18,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:03:18,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1360484888, now seen corresponding path program 58 times [2022-01-31 17:03:18,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:03:18,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1017501682] [2022-01-31 17:03:18,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:03:18,189 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:03:18,189 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:03:18,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:03:18,196 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:03:18,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:19,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:03:19,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:19,393 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 17:03:19,393 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:03:19,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1017501682] [2022-01-31 17:03:19,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1017501682] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:03:19,393 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:03:19,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-01-31 17:03:19,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311107800] [2022-01-31 17:03:19,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:03:19,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-01-31 17:03:19,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:03:19,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-01-31 17:03:19,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 17:03:19,395 INFO L87 Difference]: Start difference. First operand 1201 states and 1674 transitions. Second operand has 63 states, 63 states have (on average 2.1587301587301586) internal successors, (136), 62 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 17:03:23,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:03:23,387 INFO L93 Difference]: Finished difference Result 2315 states and 3278 transitions. [2022-01-31 17:03:23,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-31 17:03:23,388 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.1587301587301586) internal successors, (136), 62 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 143 [2022-01-31 17:03:23,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:03:23,390 INFO L225 Difference]: With dead ends: 2315 [2022-01-31 17:03:23,390 INFO L226 Difference]: Without dead ends: 1239 [2022-01-31 17:03:23,392 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1829 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=5673, Invalid=9333, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 17:03:23,392 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 4608 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 2285 mSolverCounterSat, 903 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4611 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 3188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 903 IncrementalHoareTripleChecker+Valid, 2285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:03:23,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4611 Valid, 69 Invalid, 3188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [903 Valid, 2285 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 17:03:23,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1239 states. [2022-01-31 17:03:23,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1239 to 1221. [2022-01-31 17:03:23,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1221 states, 1096 states have (on average 1.3312043795620438) internal successors, (1459), 1096 states have internal predecessors, (1459), 122 states have call successors, (122), 3 states have call predecessors, (122), 2 states have return successors, (121), 121 states have call predecessors, (121), 121 states have call successors, (121) [2022-01-31 17:03:23,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 1702 transitions. [2022-01-31 17:03:23,781 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 1702 transitions. Word has length 143 [2022-01-31 17:03:23,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:03:23,781 INFO L470 AbstractCegarLoop]: Abstraction has 1221 states and 1702 transitions. [2022-01-31 17:03:23,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.1587301587301586) internal successors, (136), 62 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 17:03:23,781 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 1702 transitions. [2022-01-31 17:03:23,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-01-31 17:03:23,782 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:03:23,782 INFO L514 BasicCegarLoop]: trace histogram [60, 60, 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 17:03:23,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-01-31 17:03:23,782 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:03:23,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:03:23,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1790237894, now seen corresponding path program 59 times [2022-01-31 17:03:23,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:03:23,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1887889810] [2022-01-31 17:03:23,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:03:23,784 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:03:23,784 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:03:23,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:03:23,786 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:03:23,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:24,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:03:24,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:24,877 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 17:03:24,877 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:03:24,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1887889810] [2022-01-31 17:03:24,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1887889810] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:03:24,877 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:03:24,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-01-31 17:03:24,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271042639] [2022-01-31 17:03:24,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:03:24,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-01-31 17:03:24,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:03:24,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-01-31 17:03:24,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 17:03:24,879 INFO L87 Difference]: Start difference. First operand 1221 states and 1702 transitions. Second operand has 64 states, 64 states have (on average 2.15625) internal successors, (138), 63 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 17:03:28,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:03:28,888 INFO L93 Difference]: Finished difference Result 2353 states and 3332 transitions. [2022-01-31 17:03:28,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-31 17:03:28,888 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.15625) internal successors, (138), 63 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 145 [2022-01-31 17:03:28,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:03:28,891 INFO L225 Difference]: With dead ends: 2353 [2022-01-31 17:03:28,891 INFO L226 Difference]: Without dead ends: 1259 [2022-01-31 17:03:28,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1890 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=5859, Invalid=9641, Unknown=0, NotChecked=0, Total=15500 [2022-01-31 17:03:28,893 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 6120 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 2247 mSolverCounterSat, 1171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6123 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 3418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1171 IncrementalHoareTripleChecker+Valid, 2247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:03:28,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6123 Valid, 75 Invalid, 3418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1171 Valid, 2247 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 17:03:28,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1259 states. [2022-01-31 17:03:29,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1259 to 1241. [2022-01-31 17:03:29,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1241 states, 1114 states have (on average 1.3312387791741471) internal successors, (1483), 1114 states have internal predecessors, (1483), 124 states have call successors, (124), 3 states have call predecessors, (124), 2 states have return successors, (123), 123 states have call predecessors, (123), 123 states have call successors, (123) [2022-01-31 17:03:29,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1241 states to 1241 states and 1730 transitions. [2022-01-31 17:03:29,290 INFO L78 Accepts]: Start accepts. Automaton has 1241 states and 1730 transitions. Word has length 145 [2022-01-31 17:03:29,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:03:29,290 INFO L470 AbstractCegarLoop]: Abstraction has 1241 states and 1730 transitions. [2022-01-31 17:03:29,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.15625) internal successors, (138), 63 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 17:03:29,290 INFO L276 IsEmpty]: Start isEmpty. Operand 1241 states and 1730 transitions. [2022-01-31 17:03:29,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-01-31 17:03:29,291 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:03:29,291 INFO L514 BasicCegarLoop]: trace histogram [61, 61, 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 17:03:29,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-01-31 17:03:29,291 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:03:29,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:03:29,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1682887716, now seen corresponding path program 60 times [2022-01-31 17:03:29,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:03:29,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1082110975] [2022-01-31 17:03:29,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:03:29,293 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:03:29,293 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:03:29,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:03:29,295 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:03:29,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:30,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:03:30,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:30,569 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 17:03:30,569 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:03:30,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1082110975] [2022-01-31 17:03:30,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1082110975] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:03:30,569 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:03:30,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-01-31 17:03:30,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407128955] [2022-01-31 17:03:30,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:03:30,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-01-31 17:03:30,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:03:30,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-01-31 17:03:30,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 17:03:30,571 INFO L87 Difference]: Start difference. First operand 1241 states and 1730 transitions. Second operand has 65 states, 65 states have (on average 2.1538461538461537) internal successors, (140), 64 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 17:03:35,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:03:35,181 INFO L93 Difference]: Finished difference Result 2391 states and 3386 transitions. [2022-01-31 17:03:35,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-31 17:03:35,182 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.1538461538461537) internal successors, (140), 64 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 147 [2022-01-31 17:03:35,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:03:35,184 INFO L225 Difference]: With dead ends: 2391 [2022-01-31 17:03:35,184 INFO L226 Difference]: Without dead ends: 1279 [2022-01-31 17:03:35,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1952 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=6048, Invalid=9954, Unknown=0, NotChecked=0, Total=16002 [2022-01-31 17:03:35,187 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 5602 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 2345 mSolverCounterSat, 1084 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5605 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 3429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1084 IncrementalHoareTripleChecker+Valid, 2345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:03:35,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5605 Valid, 76 Invalid, 3429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1084 Valid, 2345 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-31 17:03:35,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2022-01-31 17:03:35,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 1261. [2022-01-31 17:03:35,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1261 states, 1132 states have (on average 1.3312720848056536) internal successors, (1507), 1132 states have internal predecessors, (1507), 126 states have call successors, (126), 3 states have call predecessors, (126), 2 states have return successors, (125), 125 states have call predecessors, (125), 125 states have call successors, (125) [2022-01-31 17:03:35,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1261 states to 1261 states and 1758 transitions. [2022-01-31 17:03:35,607 INFO L78 Accepts]: Start accepts. Automaton has 1261 states and 1758 transitions. Word has length 147 [2022-01-31 17:03:35,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:03:35,607 INFO L470 AbstractCegarLoop]: Abstraction has 1261 states and 1758 transitions. [2022-01-31 17:03:35,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.1538461538461537) internal successors, (140), 64 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 17:03:35,607 INFO L276 IsEmpty]: Start isEmpty. Operand 1261 states and 1758 transitions. [2022-01-31 17:03:35,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-01-31 17:03:35,608 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:03:35,608 INFO L514 BasicCegarLoop]: trace histogram [62, 62, 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 17:03:35,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-01-31 17:03:35,608 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:03:35,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:03:35,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1598581762, now seen corresponding path program 61 times [2022-01-31 17:03:35,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:03:35,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [784611487] [2022-01-31 17:03:35,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:03:35,609 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:03:35,609 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:03:35,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:03:35,612 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:03:35,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:36,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:03:36,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:36,893 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 17:03:36,893 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:03:36,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [784611487] [2022-01-31 17:03:36,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [784611487] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:03:36,893 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:03:36,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-01-31 17:03:36,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688079693] [2022-01-31 17:03:36,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:03:36,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-01-31 17:03:36,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:03:36,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-01-31 17:03:36,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 17:03:36,894 INFO L87 Difference]: Start difference. First operand 1261 states and 1758 transitions. Second operand has 66 states, 66 states have (on average 2.1515151515151514) internal successors, (142), 65 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 17:03:41,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:03:41,511 INFO L93 Difference]: Finished difference Result 2429 states and 3440 transitions. [2022-01-31 17:03:41,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-31 17:03:41,511 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.1515151515151514) internal successors, (142), 65 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 149 [2022-01-31 17:03:41,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:03:41,514 INFO L225 Difference]: With dead ends: 2429 [2022-01-31 17:03:41,514 INFO L226 Difference]: Without dead ends: 1299 [2022-01-31 17:03:41,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2015 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=6240, Invalid=10272, Unknown=0, NotChecked=0, Total=16512 [2022-01-31 17:03:41,516 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 6505 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 2237 mSolverCounterSat, 1247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6508 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 3484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1247 IncrementalHoareTripleChecker+Valid, 2237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:03:41,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6508 Valid, 64 Invalid, 3484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1247 Valid, 2237 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-31 17:03:41,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1299 states. [2022-01-31 17:03:41,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1299 to 1281. [2022-01-31 17:03:41,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1281 states, 1150 states have (on average 1.3313043478260869) internal successors, (1531), 1150 states have internal predecessors, (1531), 128 states have call successors, (128), 3 states have call predecessors, (128), 2 states have return successors, (127), 127 states have call predecessors, (127), 127 states have call successors, (127) [2022-01-31 17:03:41,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1281 states to 1281 states and 1786 transitions. [2022-01-31 17:03:41,935 INFO L78 Accepts]: Start accepts. Automaton has 1281 states and 1786 transitions. Word has length 149 [2022-01-31 17:03:41,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:03:41,936 INFO L470 AbstractCegarLoop]: Abstraction has 1281 states and 1786 transitions. [2022-01-31 17:03:41,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.1515151515151514) internal successors, (142), 65 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 17:03:41,936 INFO L276 IsEmpty]: Start isEmpty. Operand 1281 states and 1786 transitions. [2022-01-31 17:03:41,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-01-31 17:03:41,936 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:03:41,936 INFO L514 BasicCegarLoop]: trace histogram [63, 63, 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 17:03:41,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-01-31 17:03:41,937 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:03:41,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:03:41,937 INFO L85 PathProgramCache]: Analyzing trace with hash -2110028704, now seen corresponding path program 62 times [2022-01-31 17:03:41,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:03:41,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1322222734] [2022-01-31 17:03:41,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:03:41,938 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:03:41,938 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:03:41,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:03:41,941 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:03:41,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:43,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:03:43,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:43,257 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 17:03:43,258 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:03:43,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1322222734] [2022-01-31 17:03:43,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1322222734] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:03:43,258 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:03:43,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-01-31 17:03:43,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605953520] [2022-01-31 17:03:43,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:03:43,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-01-31 17:03:43,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:03:43,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-01-31 17:03:43,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 17:03:43,259 INFO L87 Difference]: Start difference. First operand 1281 states and 1786 transitions. Second operand has 67 states, 67 states have (on average 2.1492537313432836) internal successors, (144), 66 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 17:03:47,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:03:47,027 INFO L93 Difference]: Finished difference Result 2467 states and 3494 transitions. [2022-01-31 17:03:47,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-31 17:03:47,027 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.1492537313432836) internal successors, (144), 66 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 151 [2022-01-31 17:03:47,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:03:47,056 INFO L225 Difference]: With dead ends: 2467 [2022-01-31 17:03:47,056 INFO L226 Difference]: Without dead ends: 1319 [2022-01-31 17:03:47,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2079 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=6435, Invalid=10595, Unknown=0, NotChecked=0, Total=17030 [2022-01-31 17:03:47,062 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 5901 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 2419 mSolverCounterSat, 1134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5904 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 3553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1134 IncrementalHoareTripleChecker+Valid, 2419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:03:47,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5904 Valid, 71 Invalid, 3553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1134 Valid, 2419 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 17:03:47,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1319 states. [2022-01-31 17:03:47,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1319 to 1301. [2022-01-31 17:03:47,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1301 states, 1168 states have (on average 1.331335616438356) internal successors, (1555), 1168 states have internal predecessors, (1555), 130 states have call successors, (130), 3 states have call predecessors, (130), 2 states have return successors, (129), 129 states have call predecessors, (129), 129 states have call successors, (129) [2022-01-31 17:03:47,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1301 states to 1301 states and 1814 transitions. [2022-01-31 17:03:47,488 INFO L78 Accepts]: Start accepts. Automaton has 1301 states and 1814 transitions. Word has length 151 [2022-01-31 17:03:47,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:03:47,488 INFO L470 AbstractCegarLoop]: Abstraction has 1301 states and 1814 transitions. [2022-01-31 17:03:47,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.1492537313432836) internal successors, (144), 66 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 17:03:47,489 INFO L276 IsEmpty]: Start isEmpty. Operand 1301 states and 1814 transitions. [2022-01-31 17:03:47,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-01-31 17:03:47,489 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:03:47,489 INFO L514 BasicCegarLoop]: trace histogram [64, 64, 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 17:03:47,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-01-31 17:03:47,489 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:03:47,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:03:47,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1261830850, now seen corresponding path program 63 times [2022-01-31 17:03:47,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:03:47,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1896219927] [2022-01-31 17:03:47,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:03:47,491 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:03:47,491 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:03:47,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:03:47,493 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:03:47,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:48,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:03:48,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:48,712 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 17:03:48,712 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:03:48,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1896219927] [2022-01-31 17:03:48,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1896219927] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:03:48,712 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:03:48,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-01-31 17:03:48,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945496413] [2022-01-31 17:03:48,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:03:48,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-01-31 17:03:48,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:03:48,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-01-31 17:03:48,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 17:03:48,714 INFO L87 Difference]: Start difference. First operand 1301 states and 1814 transitions. Second operand has 68 states, 68 states have (on average 2.1470588235294117) internal successors, (146), 67 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 17:03:52,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:03:52,481 INFO L93 Difference]: Finished difference Result 2505 states and 3548 transitions. [2022-01-31 17:03:52,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-31 17:03:52,482 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.1470588235294117) internal successors, (146), 67 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 153 [2022-01-31 17:03:52,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:03:52,493 INFO L225 Difference]: With dead ends: 2505 [2022-01-31 17:03:52,493 INFO L226 Difference]: Without dead ends: 1339 [2022-01-31 17:03:52,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2144 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=6633, Invalid=10923, Unknown=0, NotChecked=0, Total=17556 [2022-01-31 17:03:52,495 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 5850 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 2459 mSolverCounterSat, 1121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5853 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 3580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1121 IncrementalHoareTripleChecker+Valid, 2459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:03:52,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5853 Valid, 65 Invalid, 3580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1121 Valid, 2459 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 17:03:52,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1339 states. [2022-01-31 17:03:52,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1339 to 1321. [2022-01-31 17:03:52,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1321 states, 1186 states have (on average 1.3313659359190557) internal successors, (1579), 1186 states have internal predecessors, (1579), 132 states have call successors, (132), 3 states have call predecessors, (132), 2 states have return successors, (131), 131 states have call predecessors, (131), 131 states have call successors, (131) [2022-01-31 17:03:52,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1321 states to 1321 states and 1842 transitions. [2022-01-31 17:03:52,943 INFO L78 Accepts]: Start accepts. Automaton has 1321 states and 1842 transitions. Word has length 153 [2022-01-31 17:03:52,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:03:52,943 INFO L470 AbstractCegarLoop]: Abstraction has 1321 states and 1842 transitions. [2022-01-31 17:03:52,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.1470588235294117) internal successors, (146), 67 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 17:03:52,944 INFO L276 IsEmpty]: Start isEmpty. Operand 1321 states and 1842 transitions. [2022-01-31 17:03:52,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-01-31 17:03:52,944 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:03:52,944 INFO L514 BasicCegarLoop]: trace histogram [65, 65, 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 17:03:52,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-01-31 17:03:52,944 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:03:52,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:03:52,945 INFO L85 PathProgramCache]: Analyzing trace with hash 2107487900, now seen corresponding path program 64 times [2022-01-31 17:03:52,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:03:52,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1611048662] [2022-01-31 17:03:52,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:03:52,946 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:03:52,946 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:03:52,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:03:52,949 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:03:52,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:54,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:03:54,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:54,302 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 17:03:54,302 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:03:54,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1611048662] [2022-01-31 17:03:54,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1611048662] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:03:54,302 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:03:54,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-01-31 17:03:54,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463053191] [2022-01-31 17:03:54,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:03:54,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-01-31 17:03:54,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:03:54,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-01-31 17:03:54,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 17:03:54,304 INFO L87 Difference]: Start difference. First operand 1321 states and 1842 transitions. Second operand has 69 states, 69 states have (on average 2.1449275362318843) internal successors, (148), 68 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 17:03:58,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:03:58,355 INFO L93 Difference]: Finished difference Result 2543 states and 3602 transitions. [2022-01-31 17:03:58,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-31 17:03:58,356 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.1449275362318843) internal successors, (148), 68 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 155 [2022-01-31 17:03:58,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:03:58,363 INFO L225 Difference]: With dead ends: 2543 [2022-01-31 17:03:58,364 INFO L226 Difference]: Without dead ends: 1359 [2022-01-31 17:03:58,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2210 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=6834, Invalid=11256, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 17:03:58,366 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 6532 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 2499 mSolverCounterSat, 1242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6535 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 3741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1242 IncrementalHoareTripleChecker+Valid, 2499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:03:58,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6535 Valid, 57 Invalid, 3741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1242 Valid, 2499 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 17:03:58,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1359 states. [2022-01-31 17:03:58,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1359 to 1341. [2022-01-31 17:03:58,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1341 states, 1204 states have (on average 1.3313953488372092) internal successors, (1603), 1204 states have internal predecessors, (1603), 134 states have call successors, (134), 3 states have call predecessors, (134), 2 states have return successors, (133), 133 states have call predecessors, (133), 133 states have call successors, (133) [2022-01-31 17:03:58,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1341 states to 1341 states and 1870 transitions. [2022-01-31 17:03:58,829 INFO L78 Accepts]: Start accepts. Automaton has 1341 states and 1870 transitions. Word has length 155 [2022-01-31 17:03:58,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:03:58,830 INFO L470 AbstractCegarLoop]: Abstraction has 1341 states and 1870 transitions. [2022-01-31 17:03:58,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.1449275362318843) internal successors, (148), 68 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 17:03:58,830 INFO L276 IsEmpty]: Start isEmpty. Operand 1341 states and 1870 transitions. [2022-01-31 17:03:58,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-01-31 17:03:58,830 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:03:58,830 INFO L514 BasicCegarLoop]: trace histogram [66, 66, 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 17:03:58,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-01-31 17:03:58,831 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:03:58,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:03:58,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1617465466, now seen corresponding path program 65 times [2022-01-31 17:03:58,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:03:58,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [524243026] [2022-01-31 17:03:58,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:03:58,832 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:03:58,832 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:03:58,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:03:58,835 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:03:58,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:59,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:03:59,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:59,974 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 17:03:59,974 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:03:59,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [524243026] [2022-01-31 17:03:59,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [524243026] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:03:59,974 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:03:59,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-01-31 17:03:59,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488607735] [2022-01-31 17:03:59,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:03:59,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-01-31 17:03:59,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:03:59,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-01-31 17:03:59,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2022-01-31 17:03:59,976 INFO L87 Difference]: Start difference. First operand 1341 states and 1870 transitions. Second operand has 70 states, 70 states have (on average 2.142857142857143) internal successors, (150), 69 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 17:04:03,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:04:03,888 INFO L93 Difference]: Finished difference Result 2581 states and 3656 transitions. [2022-01-31 17:04:03,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-31 17:04:03,888 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.142857142857143) internal successors, (150), 69 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 157 [2022-01-31 17:04:03,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:04:03,890 INFO L225 Difference]: With dead ends: 2581 [2022-01-31 17:04:03,890 INFO L226 Difference]: Without dead ends: 1379 [2022-01-31 17:04:03,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2277 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=7038, Invalid=11594, Unknown=0, NotChecked=0, Total=18632 [2022-01-31 17:04:03,892 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 6883 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 2471 mSolverCounterSat, 1310 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6886 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 3781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1310 IncrementalHoareTripleChecker+Valid, 2471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:04:03,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6886 Valid, 69 Invalid, 3781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1310 Valid, 2471 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 17:04:03,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1379 states. [2022-01-31 17:04:04,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1379 to 1361. [2022-01-31 17:04:04,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1361 states, 1222 states have (on average 1.3314238952536825) internal successors, (1627), 1222 states have internal predecessors, (1627), 136 states have call successors, (136), 3 states have call predecessors, (136), 2 states have return successors, (135), 135 states have call predecessors, (135), 135 states have call successors, (135) [2022-01-31 17:04:04,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1361 states to 1361 states and 1898 transitions. [2022-01-31 17:04:04,354 INFO L78 Accepts]: Start accepts. Automaton has 1361 states and 1898 transitions. Word has length 157 [2022-01-31 17:04:04,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:04:04,355 INFO L470 AbstractCegarLoop]: Abstraction has 1361 states and 1898 transitions. [2022-01-31 17:04:04,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.142857142857143) internal successors, (150), 69 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 17:04:04,355 INFO L276 IsEmpty]: Start isEmpty. Operand 1361 states and 1898 transitions. [2022-01-31 17:04:04,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-01-31 17:04:04,355 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:04:04,355 INFO L514 BasicCegarLoop]: trace histogram [67, 67, 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 17:04:04,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-01-31 17:04:04,355 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:04:04,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:04:04,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1142658344, now seen corresponding path program 66 times [2022-01-31 17:04:04,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:04:04,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [810325635] [2022-01-31 17:04:04,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:04:04,357 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:04:04,357 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:04:04,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:04:04,360 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:04:04,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:05,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:04:05,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:05,743 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 17:04:05,743 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:04:05,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [810325635] [2022-01-31 17:04:05,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [810325635] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:04:05,743 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:04:05,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-01-31 17:04:05,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004796407] [2022-01-31 17:04:05,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:04:05,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-01-31 17:04:05,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:04:05,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-01-31 17:04:05,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 17:04:05,745 INFO L87 Difference]: Start difference. First operand 1361 states and 1898 transitions. Second operand has 71 states, 71 states have (on average 2.140845070422535) internal successors, (152), 70 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 17:04:09,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:04:09,668 INFO L93 Difference]: Finished difference Result 2619 states and 3710 transitions. [2022-01-31 17:04:09,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-31 17:04:09,668 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.140845070422535) internal successors, (152), 70 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 159 [2022-01-31 17:04:09,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:04:09,697 INFO L225 Difference]: With dead ends: 2619 [2022-01-31 17:04:09,697 INFO L226 Difference]: Without dead ends: 1399 [2022-01-31 17:04:09,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2345 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=7245, Invalid=11937, Unknown=0, NotChecked=0, Total=19182 [2022-01-31 17:04:09,699 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 6310 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 2459 mSolverCounterSat, 1209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6313 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 3668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1209 IncrementalHoareTripleChecker+Valid, 2459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:04:09,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6313 Valid, 59 Invalid, 3668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1209 Valid, 2459 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 17:04:09,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1399 states. [2022-01-31 17:04:10,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1399 to 1381. [2022-01-31 17:04:10,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1381 states, 1240 states have (on average 1.331451612903226) internal successors, (1651), 1240 states have internal predecessors, (1651), 138 states have call successors, (138), 3 states have call predecessors, (138), 2 states have return successors, (137), 137 states have call predecessors, (137), 137 states have call successors, (137) [2022-01-31 17:04:10,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1381 states to 1381 states and 1926 transitions. [2022-01-31 17:04:10,220 INFO L78 Accepts]: Start accepts. Automaton has 1381 states and 1926 transitions. Word has length 159 [2022-01-31 17:04:10,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:04:10,220 INFO L470 AbstractCegarLoop]: Abstraction has 1381 states and 1926 transitions. [2022-01-31 17:04:10,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.140845070422535) internal successors, (152), 70 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 17:04:10,221 INFO L276 IsEmpty]: Start isEmpty. Operand 1381 states and 1926 transitions. [2022-01-31 17:04:10,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-01-31 17:04:10,221 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:04:10,221 INFO L514 BasicCegarLoop]: trace histogram [68, 68, 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 17:04:10,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-01-31 17:04:10,221 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:04:10,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:04:10,222 INFO L85 PathProgramCache]: Analyzing trace with hash 668149174, now seen corresponding path program 67 times [2022-01-31 17:04:10,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:04:10,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1996445913] [2022-01-31 17:04:10,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:04:10,223 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:04:10,223 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:04:10,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:04:10,226 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:04:10,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:11,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:04:11,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:11,608 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 17:04:11,608 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:04:11,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1996445913] [2022-01-31 17:04:11,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1996445913] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:04:11,609 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:04:11,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-01-31 17:04:11,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342386120] [2022-01-31 17:04:11,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:04:11,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-01-31 17:04:11,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:04:11,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-01-31 17:04:11,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 17:04:11,610 INFO L87 Difference]: Start difference. First operand 1381 states and 1926 transitions. Second operand has 72 states, 72 states have (on average 2.138888888888889) internal successors, (154), 71 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 17:04:16,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:04:16,578 INFO L93 Difference]: Finished difference Result 2657 states and 3764 transitions. [2022-01-31 17:04:16,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-31 17:04:16,578 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.138888888888889) internal successors, (154), 71 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 161 [2022-01-31 17:04:16,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:04:16,581 INFO L225 Difference]: With dead ends: 2657 [2022-01-31 17:04:16,581 INFO L226 Difference]: Without dead ends: 1419 [2022-01-31 17:04:16,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2414 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=7455, Invalid=12285, Unknown=0, NotChecked=0, Total=19740 [2022-01-31 17:04:16,583 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 5783 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 2679 mSolverCounterSat, 1119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5786 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 3798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1119 IncrementalHoareTripleChecker+Valid, 2679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:04:16,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5786 Valid, 82 Invalid, 3798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1119 Valid, 2679 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-31 17:04:16,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1419 states. [2022-01-31 17:04:17,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1419 to 1401. [2022-01-31 17:04:17,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1401 states, 1258 states have (on average 1.3314785373608904) internal successors, (1675), 1258 states have internal predecessors, (1675), 140 states have call successors, (140), 3 states have call predecessors, (140), 2 states have return successors, (139), 139 states have call predecessors, (139), 139 states have call successors, (139) [2022-01-31 17:04:17,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1401 states to 1401 states and 1954 transitions. [2022-01-31 17:04:17,085 INFO L78 Accepts]: Start accepts. Automaton has 1401 states and 1954 transitions. Word has length 161 [2022-01-31 17:04:17,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:04:17,085 INFO L470 AbstractCegarLoop]: Abstraction has 1401 states and 1954 transitions. [2022-01-31 17:04:17,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.138888888888889) internal successors, (154), 71 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 17:04:17,085 INFO L276 IsEmpty]: Start isEmpty. Operand 1401 states and 1954 transitions. [2022-01-31 17:04:17,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-01-31 17:04:17,085 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:04:17,086 INFO L514 BasicCegarLoop]: trace histogram [69, 69, 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 17:04:17,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-01-31 17:04:17,086 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:04:17,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:04:17,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1392419092, now seen corresponding path program 68 times [2022-01-31 17:04:17,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:04:17,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [406023403] [2022-01-31 17:04:17,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:04:17,087 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:04:17,087 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:04:17,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:04:17,090 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:04:17,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:18,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:04:18,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:18,614 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 17:04:18,614 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:04:18,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [406023403] [2022-01-31 17:04:18,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [406023403] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:04:18,614 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:04:18,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-01-31 17:04:18,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094408552] [2022-01-31 17:04:18,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:04:18,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-01-31 17:04:18,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:04:18,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-01-31 17:04:18,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 17:04:18,616 INFO L87 Difference]: Start difference. First operand 1401 states and 1954 transitions. Second operand has 73 states, 73 states have (on average 2.136986301369863) internal successors, (156), 72 states have internal predecessors, (156), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:04:23,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:04:23,717 INFO L93 Difference]: Finished difference Result 2695 states and 3818 transitions. [2022-01-31 17:04:23,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-31 17:04:23,718 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.136986301369863) internal successors, (156), 72 states have internal predecessors, (156), 2 states have call successors, (3), 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 17:04:23,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:04:23,721 INFO L225 Difference]: With dead ends: 2695 [2022-01-31 17:04:23,721 INFO L226 Difference]: Without dead ends: 1439 [2022-01-31 17:04:23,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2484 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=7668, Invalid=12638, Unknown=0, NotChecked=0, Total=20306 [2022-01-31 17:04:23,723 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 5994 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 2683 mSolverCounterSat, 1164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5997 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 3847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1164 IncrementalHoareTripleChecker+Valid, 2683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:04:23,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5997 Valid, 74 Invalid, 3847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1164 Valid, 2683 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-31 17:04:23,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1439 states. [2022-01-31 17:04:24,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1439 to 1421. [2022-01-31 17:04:24,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1421 states, 1276 states have (on average 1.3315047021943573) internal successors, (1699), 1276 states have internal predecessors, (1699), 142 states have call successors, (142), 3 states have call predecessors, (142), 2 states have return successors, (141), 141 states have call predecessors, (141), 141 states have call successors, (141) [2022-01-31 17:04:24,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1421 states to 1421 states and 1982 transitions. [2022-01-31 17:04:24,232 INFO L78 Accepts]: Start accepts. Automaton has 1421 states and 1982 transitions. Word has length 163 [2022-01-31 17:04:24,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:04:24,232 INFO L470 AbstractCegarLoop]: Abstraction has 1421 states and 1982 transitions. [2022-01-31 17:04:24,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.136986301369863) internal successors, (156), 72 states have internal predecessors, (156), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:04:24,232 INFO L276 IsEmpty]: Start isEmpty. Operand 1421 states and 1982 transitions. [2022-01-31 17:04:24,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-01-31 17:04:24,232 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:04:24,233 INFO L514 BasicCegarLoop]: trace histogram [70, 70, 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 17:04:24,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-01-31 17:04:24,233 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:04:24,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:04:24,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1631108338, now seen corresponding path program 69 times [2022-01-31 17:04:24,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:04:24,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1081964197] [2022-01-31 17:04:24,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:04:24,234 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:04:24,234 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:04:24,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:04:24,237 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:04:24,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:25,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:04:25,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:25,446 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 17:04:25,446 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:04:25,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1081964197] [2022-01-31 17:04:25,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1081964197] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:04:25,446 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:04:25,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-01-31 17:04:25,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000395102] [2022-01-31 17:04:25,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:04:25,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-01-31 17:04:25,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:04:25,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-01-31 17:04:25,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 17:04:25,448 INFO L87 Difference]: Start difference. First operand 1421 states and 1982 transitions. Second operand has 74 states, 74 states have (on average 2.135135135135135) internal successors, (158), 73 states have internal predecessors, (158), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:04:30,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:04:30,583 INFO L93 Difference]: Finished difference Result 2733 states and 3872 transitions. [2022-01-31 17:04:30,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-31 17:04:30,583 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.135135135135135) internal successors, (158), 73 states have internal predecessors, (158), 2 states have call successors, (3), 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 165 [2022-01-31 17:04:30,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:04:30,594 INFO L225 Difference]: With dead ends: 2733 [2022-01-31 17:04:30,594 INFO L226 Difference]: Without dead ends: 1459 [2022-01-31 17:04:30,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2555 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=7884, Invalid=12996, Unknown=0, NotChecked=0, Total=20880 [2022-01-31 17:04:30,596 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 6427 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 2595 mSolverCounterSat, 1238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6430 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 3833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1238 IncrementalHoareTripleChecker+Valid, 2595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:04:30,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6430 Valid, 52 Invalid, 3833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1238 Valid, 2595 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 17:04:30,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1459 states. [2022-01-31 17:04:31,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1459 to 1441. [2022-01-31 17:04:31,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1441 states, 1294 states have (on average 1.3315301391035548) internal successors, (1723), 1294 states have internal predecessors, (1723), 144 states have call successors, (144), 3 states have call predecessors, (144), 2 states have return successors, (143), 143 states have call predecessors, (143), 143 states have call successors, (143) [2022-01-31 17:04:31,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1441 states to 1441 states and 2010 transitions. [2022-01-31 17:04:31,115 INFO L78 Accepts]: Start accepts. Automaton has 1441 states and 2010 transitions. Word has length 165 [2022-01-31 17:04:31,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:04:31,115 INFO L470 AbstractCegarLoop]: Abstraction has 1441 states and 2010 transitions. [2022-01-31 17:04:31,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.135135135135135) internal successors, (158), 73 states have internal predecessors, (158), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:04:31,116 INFO L276 IsEmpty]: Start isEmpty. Operand 1441 states and 2010 transitions. [2022-01-31 17:04:31,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-01-31 17:04:31,116 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:04:31,116 INFO L514 BasicCegarLoop]: trace histogram [71, 71, 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 17:04:31,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-01-31 17:04:31,116 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:04:31,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:04:31,117 INFO L85 PathProgramCache]: Analyzing trace with hash -916760240, now seen corresponding path program 70 times [2022-01-31 17:04:31,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:04:31,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [890450806] [2022-01-31 17:04:31,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:04:31,118 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:04:31,118 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:04:31,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:04:31,121 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:04:31,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:32,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:04:32,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:32,554 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 17:04:32,554 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:04:32,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [890450806] [2022-01-31 17:04:32,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [890450806] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:04:32,554 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:04:32,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-01-31 17:04:32,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444231207] [2022-01-31 17:04:32,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:04:32,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-01-31 17:04:32,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:04:32,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-01-31 17:04:32,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 17:04:32,556 INFO L87 Difference]: Start difference. First operand 1441 states and 2010 transitions. Second operand has 75 states, 75 states have (on average 2.1333333333333333) internal successors, (160), 74 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:04:37,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:04:37,466 INFO L93 Difference]: Finished difference Result 2771 states and 3926 transitions. [2022-01-31 17:04:37,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-31 17:04:37,467 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.1333333333333333) internal successors, (160), 74 states have internal predecessors, (160), 2 states have call successors, (3), 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 17:04:37,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:04:37,469 INFO L225 Difference]: With dead ends: 2771 [2022-01-31 17:04:37,469 INFO L226 Difference]: Without dead ends: 1479 [2022-01-31 17:04:37,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2627 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=8103, Invalid=13359, Unknown=0, NotChecked=0, Total=21462 [2022-01-31 17:04:37,471 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 5663 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 2719 mSolverCounterSat, 1113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5666 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 3832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1113 IncrementalHoareTripleChecker+Valid, 2719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:04:37,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5666 Valid, 79 Invalid, 3832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1113 Valid, 2719 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-31 17:04:37,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1479 states. [2022-01-31 17:04:38,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1479 to 1461. [2022-01-31 17:04:38,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1461 states, 1312 states have (on average 1.3315548780487805) internal successors, (1747), 1312 states have internal predecessors, (1747), 146 states have call successors, (146), 3 states have call predecessors, (146), 2 states have return successors, (145), 145 states have call predecessors, (145), 145 states have call successors, (145) [2022-01-31 17:04:38,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1461 states to 1461 states and 2038 transitions. [2022-01-31 17:04:38,004 INFO L78 Accepts]: Start accepts. Automaton has 1461 states and 2038 transitions. Word has length 167 [2022-01-31 17:04:38,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:04:38,004 INFO L470 AbstractCegarLoop]: Abstraction has 1461 states and 2038 transitions. [2022-01-31 17:04:38,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.1333333333333333) internal successors, (160), 74 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:04:38,004 INFO L276 IsEmpty]: Start isEmpty. Operand 1461 states and 2038 transitions. [2022-01-31 17:04:38,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-01-31 17:04:38,005 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:04:38,005 INFO L514 BasicCegarLoop]: trace histogram [72, 72, 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 17:04:38,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-01-31 17:04:38,005 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:04:38,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:04:38,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1287104978, now seen corresponding path program 71 times [2022-01-31 17:04:38,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:04:38,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [668711930] [2022-01-31 17:04:38,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:04:38,007 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:04:38,007 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:04:38,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:04:38,010 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:04:38,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:39,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:04:39,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:39,473 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 17:04:39,474 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:04:39,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [668711930] [2022-01-31 17:04:39,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [668711930] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:04:39,474 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:04:39,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-01-31 17:04:39,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875007575] [2022-01-31 17:04:39,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:04:39,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-01-31 17:04:39,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:04:39,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-01-31 17:04:39,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 17:04:39,476 INFO L87 Difference]: Start difference. First operand 1461 states and 2038 transitions. Second operand has 76 states, 76 states have (on average 2.1315789473684212) internal successors, (162), 75 states have internal predecessors, (162), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:04:44,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:04:44,869 INFO L93 Difference]: Finished difference Result 2809 states and 3980 transitions. [2022-01-31 17:04:44,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-31 17:04:44,869 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.1315789473684212) internal successors, (162), 75 states have internal predecessors, (162), 2 states have call successors, (3), 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 169 [2022-01-31 17:04:44,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:04:44,871 INFO L225 Difference]: With dead ends: 2809 [2022-01-31 17:04:44,871 INFO L226 Difference]: Without dead ends: 1499 [2022-01-31 17:04:44,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2700 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=8325, Invalid=13727, Unknown=0, NotChecked=0, Total=22052 [2022-01-31 17:04:44,874 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 5126 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 3277 mSolverCounterSat, 1022 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5129 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 4299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1022 IncrementalHoareTripleChecker+Valid, 3277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:04:44,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5129 Valid, 97 Invalid, 4299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1022 Valid, 3277 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-31 17:04:44,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1499 states. [2022-01-31 17:04:45,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1499 to 1481. [2022-01-31 17:04:45,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1481 states, 1330 states have (on average 1.331578947368421) internal successors, (1771), 1330 states have internal predecessors, (1771), 148 states have call successors, (148), 3 states have call predecessors, (148), 2 states have return successors, (147), 147 states have call predecessors, (147), 147 states have call successors, (147) [2022-01-31 17:04:45,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1481 states to 1481 states and 2066 transitions. [2022-01-31 17:04:45,440 INFO L78 Accepts]: Start accepts. Automaton has 1481 states and 2066 transitions. Word has length 169 [2022-01-31 17:04:45,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:04:45,441 INFO L470 AbstractCegarLoop]: Abstraction has 1481 states and 2066 transitions. [2022-01-31 17:04:45,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.1315789473684212) internal successors, (162), 75 states have internal predecessors, (162), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:04:45,441 INFO L276 IsEmpty]: Start isEmpty. Operand 1481 states and 2066 transitions. [2022-01-31 17:04:45,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-01-31 17:04:45,441 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:04:45,441 INFO L514 BasicCegarLoop]: trace histogram [73, 73, 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 17:04:45,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-01-31 17:04:45,442 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:04:45,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:04:45,442 INFO L85 PathProgramCache]: Analyzing trace with hash -706112628, now seen corresponding path program 72 times [2022-01-31 17:04:45,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:04:45,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1624310210] [2022-01-31 17:04:45,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:04:45,443 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:04:45,443 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:04:45,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:04:45,446 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:04:45,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:47,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:04:47,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:47,215 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 17:04:47,215 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:04:47,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1624310210] [2022-01-31 17:04:47,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1624310210] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:04:47,216 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:04:47,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-01-31 17:04:47,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907848668] [2022-01-31 17:04:47,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:04:47,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-01-31 17:04:47,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:04:47,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-01-31 17:04:47,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 17:04:47,218 INFO L87 Difference]: Start difference. First operand 1481 states and 2066 transitions. Second operand has 77 states, 77 states have (on average 2.1298701298701297) internal successors, (164), 76 states have internal predecessors, (164), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:04:52,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:04:52,914 INFO L93 Difference]: Finished difference Result 2847 states and 4034 transitions. [2022-01-31 17:04:52,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-31 17:04:52,915 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.1298701298701297) internal successors, (164), 76 states have internal predecessors, (164), 2 states have call successors, (3), 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 17:04:52,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:04:52,917 INFO L225 Difference]: With dead ends: 2847 [2022-01-31 17:04:52,917 INFO L226 Difference]: Without dead ends: 1519 [2022-01-31 17:04:52,919 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 17:04:52,919 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 7026 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 2761 mSolverCounterSat, 1352 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7029 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 4113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1352 IncrementalHoareTripleChecker+Valid, 2761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:04:52,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7029 Valid, 59 Invalid, 4113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1352 Valid, 2761 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-31 17:04:52,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1519 states. [2022-01-31 17:04:53,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1519 to 1501. [2022-01-31 17:04:53,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1501 states, 1348 states have (on average 1.3316023738872405) internal successors, (1795), 1348 states have internal predecessors, (1795), 150 states have call successors, (150), 3 states have call predecessors, (150), 2 states have return successors, (149), 149 states have call predecessors, (149), 149 states have call successors, (149) [2022-01-31 17:04:53,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1501 states to 1501 states and 2094 transitions. [2022-01-31 17:04:53,500 INFO L78 Accepts]: Start accepts. Automaton has 1501 states and 2094 transitions. Word has length 171 [2022-01-31 17:04:53,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:04:53,500 INFO L470 AbstractCegarLoop]: Abstraction has 1501 states and 2094 transitions. [2022-01-31 17:04:53,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.1298701298701297) internal successors, (164), 76 states have internal predecessors, (164), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:04:53,501 INFO L276 IsEmpty]: Start isEmpty. Operand 1501 states and 2094 transitions. [2022-01-31 17:04:53,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-01-31 17:04:53,501 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:04:53,501 INFO L514 BasicCegarLoop]: trace histogram [74, 74, 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 17:04:53,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-01-31 17:04:53,501 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:04:53,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:04:53,502 INFO L85 PathProgramCache]: Analyzing trace with hash -718212758, now seen corresponding path program 73 times [2022-01-31 17:04:53,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:04:53,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [705504265] [2022-01-31 17:04:53,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:04:53,503 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:04:53,503 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:04:53,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:04:53,506 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:04:53,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:54,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:04:54,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:54,703 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 17:04:54,703 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:04:54,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [705504265] [2022-01-31 17:04:54,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [705504265] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:04:54,703 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:04:54,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-01-31 17:04:54,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672725290] [2022-01-31 17:04:54,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:04:54,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-01-31 17:04:54,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:04:54,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-01-31 17:04:54,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 17:04:54,705 INFO L87 Difference]: Start difference. First operand 1501 states and 2094 transitions. Second operand has 78 states, 78 states have (on average 2.128205128205128) internal successors, (166), 77 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:04:59,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:04:59,982 INFO L93 Difference]: Finished difference Result 2885 states and 4088 transitions. [2022-01-31 17:04:59,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-31 17:04:59,983 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.128205128205128) internal successors, (166), 77 states have internal predecessors, (166), 2 states have call successors, (3), 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 173 [2022-01-31 17:04:59,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:04:59,985 INFO L225 Difference]: With dead ends: 2885 [2022-01-31 17:04:59,985 INFO L226 Difference]: Without dead ends: 1539 [2022-01-31 17:04:59,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2849 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=8778, Invalid=14478, Unknown=0, NotChecked=0, Total=23256 [2022-01-31 17:04:59,987 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 6790 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 2687 mSolverCounterSat, 1307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6793 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 3994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1307 IncrementalHoareTripleChecker+Valid, 2687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:04:59,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6793 Valid, 57 Invalid, 3994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1307 Valid, 2687 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-31 17:04:59,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1539 states. [2022-01-31 17:05:00,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1539 to 1521. [2022-01-31 17:05:00,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1521 states, 1366 states have (on average 1.3316251830161054) internal successors, (1819), 1366 states have internal predecessors, (1819), 152 states have call successors, (152), 3 states have call predecessors, (152), 2 states have return successors, (151), 151 states have call predecessors, (151), 151 states have call successors, (151) [2022-01-31 17:05:00,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1521 states to 1521 states and 2122 transitions. [2022-01-31 17:05:00,560 INFO L78 Accepts]: Start accepts. Automaton has 1521 states and 2122 transitions. Word has length 173 [2022-01-31 17:05:00,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:05:00,560 INFO L470 AbstractCegarLoop]: Abstraction has 1521 states and 2122 transitions. [2022-01-31 17:05:00,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.128205128205128) internal successors, (166), 77 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:05:00,560 INFO L276 IsEmpty]: Start isEmpty. Operand 1521 states and 2122 transitions. [2022-01-31 17:05:00,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-01-31 17:05:00,561 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:05:00,561 INFO L514 BasicCegarLoop]: trace histogram [75, 75, 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 17:05:00,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-01-31 17:05:00,561 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:05:00,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:05:00,561 INFO L85 PathProgramCache]: Analyzing trace with hash 538464200, now seen corresponding path program 74 times [2022-01-31 17:05:00,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:05:00,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [407714776] [2022-01-31 17:05:00,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:05:00,562 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:05:00,562 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:05:00,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:05:00,565 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:05:00,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:02,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:05:02,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:02,372 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 17:05:02,372 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:05:02,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [407714776] [2022-01-31 17:05:02,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [407714776] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:05:02,372 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:05:02,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-01-31 17:05:02,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119317230] [2022-01-31 17:05:02,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:05:02,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-01-31 17:05:02,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:05:02,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-01-31 17:05:02,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3005, Invalid=3157, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 17:05:02,374 INFO L87 Difference]: Start difference. First operand 1521 states and 2122 transitions. Second operand has 79 states, 79 states have (on average 2.1265822784810124) internal successors, (168), 78 states have internal predecessors, (168), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:05:08,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:05:08,522 INFO L93 Difference]: Finished difference Result 2923 states and 4142 transitions. [2022-01-31 17:05:08,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-31 17:05:08,522 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.1265822784810124) internal successors, (168), 78 states have internal predecessors, (168), 2 states have call successors, (3), 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 17:05:08,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:05:08,527 INFO L225 Difference]: With dead ends: 2923 [2022-01-31 17:05:08,527 INFO L226 Difference]: Without dead ends: 1559 [2022-01-31 17:05:08,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2925 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=9009, Invalid=14861, Unknown=0, NotChecked=0, Total=23870 [2022-01-31 17:05:08,529 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 6159 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 3087 mSolverCounterSat, 1205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6162 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 4292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1205 IncrementalHoareTripleChecker+Valid, 3087 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:05:08,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6162 Valid, 83 Invalid, 4292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1205 Valid, 3087 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-31 17:05:08,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1559 states. [2022-01-31 17:05:09,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1559 to 1541. [2022-01-31 17:05:09,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1541 states, 1384 states have (on average 1.3316473988439306) internal successors, (1843), 1384 states have internal predecessors, (1843), 154 states have call successors, (154), 3 states have call predecessors, (154), 2 states have return successors, (153), 153 states have call predecessors, (153), 153 states have call successors, (153) [2022-01-31 17:05:09,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1541 states to 1541 states and 2150 transitions. [2022-01-31 17:05:09,124 INFO L78 Accepts]: Start accepts. Automaton has 1541 states and 2150 transitions. Word has length 175 [2022-01-31 17:05:09,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:05:09,125 INFO L470 AbstractCegarLoop]: Abstraction has 1541 states and 2150 transitions. [2022-01-31 17:05:09,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.1265822784810124) internal successors, (168), 78 states have internal predecessors, (168), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:05:09,125 INFO L276 IsEmpty]: Start isEmpty. Operand 1541 states and 2150 transitions. [2022-01-31 17:05:09,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-01-31 17:05:09,125 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:05:09,125 INFO L514 BasicCegarLoop]: trace histogram [76, 76, 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 17:05:09,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-01-31 17:05:09,126 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:05:09,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:05:09,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1319210662, now seen corresponding path program 75 times [2022-01-31 17:05:09,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:05:09,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1907049050] [2022-01-31 17:05:09,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:05:09,127 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:05:09,127 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:05:09,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:05:09,130 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:05:09,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:10,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:05:10,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:10,507 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 17:05:10,507 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:05:10,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1907049050] [2022-01-31 17:05:10,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1907049050] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:05:10,507 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:05:10,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-01-31 17:05:10,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494318615] [2022-01-31 17:05:10,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:05:10,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-01-31 17:05:10,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:05:10,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-01-31 17:05:10,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 17:05:10,509 INFO L87 Difference]: Start difference. First operand 1541 states and 2150 transitions. Second operand has 80 states, 80 states have (on average 2.125) internal successors, (170), 79 states have internal predecessors, (170), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:05:16,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:05:16,037 INFO L93 Difference]: Finished difference Result 2961 states and 4196 transitions. [2022-01-31 17:05:16,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-01-31 17:05:16,038 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.125) internal successors, (170), 79 states have internal predecessors, (170), 2 states have call successors, (3), 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 177 [2022-01-31 17:05:16,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:05:16,040 INFO L225 Difference]: With dead ends: 2961 [2022-01-31 17:05:16,040 INFO L226 Difference]: Without dead ends: 1579 [2022-01-31 17:05:16,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3002 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=9243, Invalid=15249, Unknown=0, NotChecked=0, Total=24492 [2022-01-31 17:05:16,042 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 6724 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 2981 mSolverCounterSat, 1305 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6727 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 4286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1305 IncrementalHoareTripleChecker+Valid, 2981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:05:16,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6727 Valid, 85 Invalid, 4286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1305 Valid, 2981 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-31 17:05:16,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1579 states. [2022-01-31 17:05:16,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1579 to 1561. [2022-01-31 17:05:16,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1561 states, 1402 states have (on average 1.3316690442225392) internal successors, (1867), 1402 states have internal predecessors, (1867), 156 states have call successors, (156), 3 states have call predecessors, (156), 2 states have return successors, (155), 155 states have call predecessors, (155), 155 states have call successors, (155) [2022-01-31 17:05:16,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1561 states to 1561 states and 2178 transitions. [2022-01-31 17:05:16,650 INFO L78 Accepts]: Start accepts. Automaton has 1561 states and 2178 transitions. Word has length 177 [2022-01-31 17:05:16,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:05:16,650 INFO L470 AbstractCegarLoop]: Abstraction has 1561 states and 2178 transitions. [2022-01-31 17:05:16,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.125) internal successors, (170), 79 states have internal predecessors, (170), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:05:16,650 INFO L276 IsEmpty]: Start isEmpty. Operand 1561 states and 2178 transitions. [2022-01-31 17:05:16,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-01-31 17:05:16,651 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:05:16,651 INFO L514 BasicCegarLoop]: trace histogram [77, 77, 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 17:05:16,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-01-31 17:05:16,651 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:05:16,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:05:16,651 INFO L85 PathProgramCache]: Analyzing trace with hash -2716156, now seen corresponding path program 76 times [2022-01-31 17:05:16,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:05:16,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [224991613] [2022-01-31 17:05:16,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:05:16,653 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:05:16,653 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:05:16,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:05:16,656 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:05:16,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:18,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:05:18,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:18,504 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 17:05:18,504 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:05:18,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [224991613] [2022-01-31 17:05:18,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [224991613] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:05:18,504 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:05:18,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-01-31 17:05:18,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017107487] [2022-01-31 17:05:18,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:05:18,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-01-31 17:05:18,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:05:18,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-01-31 17:05:18,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3162, Invalid=3318, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 17:05:18,506 INFO L87 Difference]: Start difference. First operand 1561 states and 2178 transitions. Second operand has 81 states, 81 states have (on average 2.123456790123457) internal successors, (172), 80 states have internal predecessors, (172), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:05:25,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:05:25,290 INFO L93 Difference]: Finished difference Result 2999 states and 4250 transitions. [2022-01-31 17:05:25,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-01-31 17:05:25,291 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.123456790123457) internal successors, (172), 80 states have internal predecessors, (172), 2 states have call successors, (3), 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 17:05:25,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:05:25,293 INFO L225 Difference]: With dead ends: 2999 [2022-01-31 17:05:25,293 INFO L226 Difference]: Without dead ends: 1599 [2022-01-31 17:05:25,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3080 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=9480, Invalid=15642, Unknown=0, NotChecked=0, Total=25122 [2022-01-31 17:05:25,297 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 6641 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 3187 mSolverCounterSat, 1289 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6644 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 4476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1289 IncrementalHoareTripleChecker+Valid, 3187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:05:25,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6644 Valid, 66 Invalid, 4476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1289 Valid, 3187 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-01-31 17:05:25,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1599 states. [2022-01-31 17:05:25,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1599 to 1581. [2022-01-31 17:05:25,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1581 states, 1420 states have (on average 1.3316901408450703) internal successors, (1891), 1420 states have internal predecessors, (1891), 158 states have call successors, (158), 3 states have call predecessors, (158), 2 states have return successors, (157), 157 states have call predecessors, (157), 157 states have call successors, (157) [2022-01-31 17:05:25,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1581 states to 1581 states and 2206 transitions. [2022-01-31 17:05:25,937 INFO L78 Accepts]: Start accepts. Automaton has 1581 states and 2206 transitions. Word has length 179 [2022-01-31 17:05:25,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:05:25,937 INFO L470 AbstractCegarLoop]: Abstraction has 1581 states and 2206 transitions. [2022-01-31 17:05:25,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.123456790123457) internal successors, (172), 80 states have internal predecessors, (172), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:05:25,937 INFO L276 IsEmpty]: Start isEmpty. Operand 1581 states and 2206 transitions. [2022-01-31 17:05:25,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-01-31 17:05:25,937 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:05:25,938 INFO L514 BasicCegarLoop]: trace histogram [78, 78, 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 17:05:25,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-01-31 17:05:25,938 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:05:25,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:05:25,938 INFO L85 PathProgramCache]: Analyzing trace with hash 935931362, now seen corresponding path program 77 times [2022-01-31 17:05:25,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:05:25,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [139478299] [2022-01-31 17:05:25,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:05:25,939 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:05:25,939 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:05:25,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:05:25,943 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:05:25,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:27,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:05:27,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:27,894 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 17:05:27,894 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:05:27,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [139478299] [2022-01-31 17:05:27,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [139478299] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:05:27,895 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:05:27,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-01-31 17:05:27,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962051779] [2022-01-31 17:05:27,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:05:27,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-01-31 17:05:27,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:05:27,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-01-31 17:05:27,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2022-01-31 17:05:27,897 INFO L87 Difference]: Start difference. First operand 1581 states and 2206 transitions. Second operand has 82 states, 82 states have (on average 2.1219512195121952) internal successors, (174), 81 states have internal predecessors, (174), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:05:34,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:05:34,499 INFO L93 Difference]: Finished difference Result 3037 states and 4304 transitions. [2022-01-31 17:05:34,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-31 17:05:34,499 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.1219512195121952) internal successors, (174), 81 states have internal predecessors, (174), 2 states have call successors, (3), 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 181 [2022-01-31 17:05:34,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:05:34,501 INFO L225 Difference]: With dead ends: 3037 [2022-01-31 17:05:34,501 INFO L226 Difference]: Without dead ends: 1619 [2022-01-31 17:05:34,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3159 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=9720, Invalid=16040, Unknown=0, NotChecked=0, Total=25760 [2022-01-31 17:05:34,506 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 6475 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 3253 mSolverCounterSat, 1257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6478 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 4510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1257 IncrementalHoareTripleChecker+Valid, 3253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:05:34,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6478 Valid, 83 Invalid, 4510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1257 Valid, 3253 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-01-31 17:05:34,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1619 states. [2022-01-31 17:05:35,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1619 to 1601. [2022-01-31 17:05:35,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1601 states, 1438 states have (on average 1.3317107093184979) internal successors, (1915), 1438 states have internal predecessors, (1915), 160 states have call successors, (160), 3 states have call predecessors, (160), 2 states have return successors, (159), 159 states have call predecessors, (159), 159 states have call successors, (159) [2022-01-31 17:05:35,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1601 states to 1601 states and 2234 transitions. [2022-01-31 17:05:35,164 INFO L78 Accepts]: Start accepts. Automaton has 1601 states and 2234 transitions. Word has length 181 [2022-01-31 17:05:35,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:05:35,164 INFO L470 AbstractCegarLoop]: Abstraction has 1601 states and 2234 transitions. [2022-01-31 17:05:35,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.1219512195121952) internal successors, (174), 81 states have internal predecessors, (174), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:05:35,164 INFO L276 IsEmpty]: Start isEmpty. Operand 1601 states and 2234 transitions. [2022-01-31 17:05:35,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-01-31 17:05:35,165 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:05:35,165 INFO L514 BasicCegarLoop]: trace histogram [79, 79, 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 17:05:35,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-01-31 17:05:35,165 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:05:35,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:05:35,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1033064000, now seen corresponding path program 78 times [2022-01-31 17:05:35,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:05:35,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1543411682] [2022-01-31 17:05:35,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:05:35,167 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:05:35,167 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:05:35,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:05:35,170 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:05:35,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:36,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:05:36,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:36,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:05:36,895 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:05:36,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1543411682] [2022-01-31 17:05:36,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1543411682] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:05:36,896 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:05:36,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-01-31 17:05:36,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741236160] [2022-01-31 17:05:36,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:05:36,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-01-31 17:05:36,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:05:36,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-01-31 17:05:36,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3323, Invalid=3483, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 17:05:36,898 INFO L87 Difference]: Start difference. First operand 1601 states and 2234 transitions. Second operand has 83 states, 83 states have (on average 2.1204819277108435) internal successors, (176), 82 states have internal predecessors, (176), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:05:43,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:05:43,670 INFO L93 Difference]: Finished difference Result 3075 states and 4358 transitions. [2022-01-31 17:05:43,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-01-31 17:05:43,670 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.1204819277108435) internal successors, (176), 82 states have internal predecessors, (176), 2 states have call successors, (3), 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 17:05:43,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:05:43,673 INFO L225 Difference]: With dead ends: 3075 [2022-01-31 17:05:43,673 INFO L226 Difference]: Without dead ends: 1639 [2022-01-31 17:05:43,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3239 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=9963, Invalid=16443, Unknown=0, NotChecked=0, Total=26406 [2022-01-31 17:05:43,676 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 7295 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 3027 mSolverCounterSat, 1409 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7298 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 4436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1409 IncrementalHoareTripleChecker+Valid, 3027 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:05:43,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7298 Valid, 76 Invalid, 4436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1409 Valid, 3027 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-31 17:05:43,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1639 states. [2022-01-31 17:05:44,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1639 to 1621. [2022-01-31 17:05:44,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1621 states, 1456 states have (on average 1.3317307692307692) internal successors, (1939), 1456 states have internal predecessors, (1939), 162 states have call successors, (162), 3 states have call predecessors, (162), 2 states have return successors, (161), 161 states have call predecessors, (161), 161 states have call successors, (161) [2022-01-31 17:05:44,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 2262 transitions. [2022-01-31 17:05:44,344 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 2262 transitions. Word has length 183 [2022-01-31 17:05:44,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:05:44,344 INFO L470 AbstractCegarLoop]: Abstraction has 1621 states and 2262 transitions. [2022-01-31 17:05:44,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.1204819277108435) internal successors, (176), 82 states have internal predecessors, (176), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:05:44,344 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 2262 transitions. [2022-01-31 17:05:44,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-01-31 17:05:44,345 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:05:44,345 INFO L514 BasicCegarLoop]: trace histogram [80, 80, 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 17:05:44,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-01-31 17:05:44,345 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:05:44,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:05:44,345 INFO L85 PathProgramCache]: Analyzing trace with hash -111751394, now seen corresponding path program 79 times [2022-01-31 17:05:44,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:05:44,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1809504553] [2022-01-31 17:05:44,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:05:44,347 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:05:44,347 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:05:44,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:05:44,350 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:05:44,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:46,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:05:46,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:46,433 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 17:05:46,433 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:05:46,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1809504553] [2022-01-31 17:05:46,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1809504553] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:05:46,434 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:05:46,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-01-31 17:05:46,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400412968] [2022-01-31 17:05:46,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:05:46,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-01-31 17:05:46,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:05:46,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-01-31 17:05:46,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 17:05:46,436 INFO L87 Difference]: Start difference. First operand 1621 states and 2262 transitions. Second operand has 84 states, 84 states have (on average 2.119047619047619) internal successors, (178), 83 states have internal predecessors, (178), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:05:53,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:05:53,524 INFO L93 Difference]: Finished difference Result 3113 states and 4412 transitions. [2022-01-31 17:05:53,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-31 17:05:53,525 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.119047619047619) internal successors, (178), 83 states have internal predecessors, (178), 2 states have call successors, (3), 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 185 [2022-01-31 17:05:53,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:05:53,527 INFO L225 Difference]: With dead ends: 3113 [2022-01-31 17:05:53,527 INFO L226 Difference]: Without dead ends: 1659 [2022-01-31 17:05:53,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3320 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=10209, Invalid=16851, Unknown=0, NotChecked=0, Total=27060 [2022-01-31 17:05:53,530 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 7254 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 3097 mSolverCounterSat, 1397 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7257 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 4494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1397 IncrementalHoareTripleChecker+Valid, 3097 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:05:53,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7257 Valid, 81 Invalid, 4494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1397 Valid, 3097 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-01-31 17:05:53,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1659 states. [2022-01-31 17:05:54,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1659 to 1641. [2022-01-31 17:05:54,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1641 states, 1474 states have (on average 1.3317503392130259) internal successors, (1963), 1474 states have internal predecessors, (1963), 164 states have call successors, (164), 3 states have call predecessors, (164), 2 states have return successors, (163), 163 states have call predecessors, (163), 163 states have call successors, (163) [2022-01-31 17:05:54,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1641 states to 1641 states and 2290 transitions. [2022-01-31 17:05:54,213 INFO L78 Accepts]: Start accepts. Automaton has 1641 states and 2290 transitions. Word has length 185 [2022-01-31 17:05:54,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:05:54,214 INFO L470 AbstractCegarLoop]: Abstraction has 1641 states and 2290 transitions. [2022-01-31 17:05:54,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.119047619047619) internal successors, (178), 83 states have internal predecessors, (178), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:05:54,215 INFO L276 IsEmpty]: Start isEmpty. Operand 1641 states and 2290 transitions. [2022-01-31 17:05:54,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-01-31 17:05:54,215 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:05:54,215 INFO L514 BasicCegarLoop]: trace histogram [81, 81, 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 17:05:54,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-01-31 17:05:54,216 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:05:54,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:05:54,216 INFO L85 PathProgramCache]: Analyzing trace with hash -767717252, now seen corresponding path program 80 times [2022-01-31 17:05:54,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:05:54,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [45606976] [2022-01-31 17:05:54,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:05:54,218 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:05:54,218 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:05:54,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:05:54,226 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:05:54,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:55,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:05:55,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:55,754 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 17:05:55,754 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:05:55,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [45606976] [2022-01-31 17:05:55,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [45606976] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:05:55,754 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:05:55,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-01-31 17:05:55,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394229951] [2022-01-31 17:05:55,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:05:55,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-01-31 17:05:55,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:05:55,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-01-31 17:05:55,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3488, Invalid=3652, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 17:05:55,758 INFO L87 Difference]: Start difference. First operand 1641 states and 2290 transitions. Second operand has 85 states, 85 states have (on average 2.1176470588235294) internal successors, (180), 84 states have internal predecessors, (180), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:06:02,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:06:02,130 INFO L93 Difference]: Finished difference Result 3151 states and 4466 transitions. [2022-01-31 17:06:02,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-01-31 17:06:02,130 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.1176470588235294) internal successors, (180), 84 states have internal predecessors, (180), 2 states have call successors, (3), 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 17:06:02,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:06:02,133 INFO L225 Difference]: With dead ends: 3151 [2022-01-31 17:06:02,133 INFO L226 Difference]: Without dead ends: 1679 [2022-01-31 17:06:02,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3402 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=10458, Invalid=17264, Unknown=0, NotChecked=0, Total=27722 [2022-01-31 17:06:02,138 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 7168 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 3113 mSolverCounterSat, 1376 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7171 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 4489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1376 IncrementalHoareTripleChecker+Valid, 3113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:06:02,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7171 Valid, 82 Invalid, 4489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1376 Valid, 3113 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-31 17:06:02,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1679 states. [2022-01-31 17:06:02,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1679 to 1661. [2022-01-31 17:06:02,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1661 states, 1492 states have (on average 1.331769436997319) internal successors, (1987), 1492 states have internal predecessors, (1987), 166 states have call successors, (166), 3 states have call predecessors, (166), 2 states have return successors, (165), 165 states have call predecessors, (165), 165 states have call successors, (165) [2022-01-31 17:06:02,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1661 states to 1661 states and 2318 transitions. [2022-01-31 17:06:02,835 INFO L78 Accepts]: Start accepts. Automaton has 1661 states and 2318 transitions. Word has length 187 [2022-01-31 17:06:02,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:06:02,835 INFO L470 AbstractCegarLoop]: Abstraction has 1661 states and 2318 transitions. [2022-01-31 17:06:02,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.1176470588235294) internal successors, (180), 84 states have internal predecessors, (180), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:06:02,836 INFO L276 IsEmpty]: Start isEmpty. Operand 1661 states and 2318 transitions. [2022-01-31 17:06:02,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-01-31 17:06:02,836 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:06:02,836 INFO L514 BasicCegarLoop]: trace histogram [82, 82, 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 17:06:02,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-01-31 17:06:02,836 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:06:02,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:06:02,850 INFO L85 PathProgramCache]: Analyzing trace with hash 209285722, now seen corresponding path program 81 times [2022-01-31 17:06:02,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:06:02,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1755500244] [2022-01-31 17:06:02,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:06:02,852 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:06:02,852 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:06:02,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:06:02,856 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:06:02,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:04,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:06:04,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:04,940 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 17:06:04,940 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:06:04,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1755500244] [2022-01-31 17:06:04,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1755500244] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:06:04,940 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:06:04,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-01-31 17:06:04,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479327335] [2022-01-31 17:06:04,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:06:04,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-01-31 17:06:04,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:06:04,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-01-31 17:06:04,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2022-01-31 17:06:04,943 INFO L87 Difference]: Start difference. First operand 1661 states and 2318 transitions. Second operand has 86 states, 86 states have (on average 2.116279069767442) internal successors, (182), 85 states have internal predecessors, (182), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:06:12,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:06:12,606 INFO L93 Difference]: Finished difference Result 3189 states and 4520 transitions. [2022-01-31 17:06:12,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-31 17:06:12,606 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.116279069767442) internal successors, (182), 85 states have internal predecessors, (182), 2 states have call successors, (3), 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 189 [2022-01-31 17:06:12,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:06:12,609 INFO L225 Difference]: With dead ends: 3189 [2022-01-31 17:06:12,609 INFO L226 Difference]: Without dead ends: 1699 [2022-01-31 17:06:12,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3485 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=10710, Invalid=17682, Unknown=0, NotChecked=0, Total=28392 [2022-01-31 17:06:12,611 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 7073 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 3259 mSolverCounterSat, 1379 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7076 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 4638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1379 IncrementalHoareTripleChecker+Valid, 3259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:06:12,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7076 Valid, 77 Invalid, 4638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1379 Valid, 3259 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-01-31 17:06:12,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1699 states. [2022-01-31 17:06:13,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1699 to 1681. [2022-01-31 17:06:13,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1681 states, 1510 states have (on average 1.3317880794701986) internal successors, (2011), 1510 states have internal predecessors, (2011), 168 states have call successors, (168), 3 states have call predecessors, (168), 2 states have return successors, (167), 167 states have call predecessors, (167), 167 states have call successors, (167) [2022-01-31 17:06:13,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1681 states to 1681 states and 2346 transitions. [2022-01-31 17:06:13,322 INFO L78 Accepts]: Start accepts. Automaton has 1681 states and 2346 transitions. Word has length 189 [2022-01-31 17:06:13,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:06:13,322 INFO L470 AbstractCegarLoop]: Abstraction has 1681 states and 2346 transitions. [2022-01-31 17:06:13,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.116279069767442) internal successors, (182), 85 states have internal predecessors, (182), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:06:13,323 INFO L276 IsEmpty]: Start isEmpty. Operand 1681 states and 2346 transitions. [2022-01-31 17:06:13,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-01-31 17:06:13,323 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:06:13,323 INFO L514 BasicCegarLoop]: trace histogram [83, 83, 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 17:06:13,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-01-31 17:06:13,323 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:06:13,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:06:13,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1488694088, now seen corresponding path program 82 times [2022-01-31 17:06:13,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:06:13,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1099468767] [2022-01-31 17:06:13,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:06:13,325 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:06:13,325 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:06:13,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:06:13,329 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:06:13,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:15,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:06:15,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:15,608 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 17:06:15,608 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:06:15,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1099468767] [2022-01-31 17:06:15,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1099468767] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:06:15,609 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:06:15,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-01-31 17:06:15,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564059093] [2022-01-31 17:06:15,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:06:15,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-01-31 17:06:15,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:06:15,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-01-31 17:06:15,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3657, Invalid=3825, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 17:06:15,611 INFO L87 Difference]: Start difference. First operand 1681 states and 2346 transitions. Second operand has 87 states, 87 states have (on average 2.1149425287356323) internal successors, (184), 86 states have internal predecessors, (184), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:06:22,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:06:22,733 INFO L93 Difference]: Finished difference Result 3227 states and 4574 transitions. [2022-01-31 17:06:22,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-01-31 17:06:22,733 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.1149425287356323) internal successors, (184), 86 states have internal predecessors, (184), 2 states have call successors, (3), 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 17:06:22,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:06:22,736 INFO L225 Difference]: With dead ends: 3227 [2022-01-31 17:06:22,736 INFO L226 Difference]: Without dead ends: 1719 [2022-01-31 17:06:22,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3569 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=10965, Invalid=18105, Unknown=0, NotChecked=0, Total=29070 [2022-01-31 17:06:22,759 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 6836 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 3187 mSolverCounterSat, 1336 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6839 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 4523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1336 IncrementalHoareTripleChecker+Valid, 3187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:06:22,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6839 Valid, 72 Invalid, 4523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1336 Valid, 3187 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-31 17:06:22,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1719 states. [2022-01-31 17:06:23,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1719 to 1701. [2022-01-31 17:06:23,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1701 states, 1528 states have (on average 1.331806282722513) internal successors, (2035), 1528 states have internal predecessors, (2035), 170 states have call successors, (170), 3 states have call predecessors, (170), 2 states have return successors, (169), 169 states have call predecessors, (169), 169 states have call successors, (169) [2022-01-31 17:06:23,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1701 states to 1701 states and 2374 transitions. [2022-01-31 17:06:23,490 INFO L78 Accepts]: Start accepts. Automaton has 1701 states and 2374 transitions. Word has length 191 [2022-01-31 17:06:23,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:06:23,490 INFO L470 AbstractCegarLoop]: Abstraction has 1701 states and 2374 transitions. [2022-01-31 17:06:23,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 2.1149425287356323) internal successors, (184), 86 states have internal predecessors, (184), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:06:23,491 INFO L276 IsEmpty]: Start isEmpty. Operand 1701 states and 2374 transitions. [2022-01-31 17:06:23,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-01-31 17:06:23,491 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:06:23,491 INFO L514 BasicCegarLoop]: trace histogram [84, 84, 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 17:06:23,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-01-31 17:06:23,491 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:06:23,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:06:23,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1159719018, now seen corresponding path program 83 times [2022-01-31 17:06:23,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:06:23,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1156089742] [2022-01-31 17:06:23,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:06:23,493 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:06:23,493 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:06:23,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:06:23,497 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:06:23,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:25,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:06:25,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:25,758 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 17:06:25,758 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:06:25,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1156089742] [2022-01-31 17:06:25,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1156089742] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:06:25,758 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:06:25,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-01-31 17:06:25,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124397064] [2022-01-31 17:06:25,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:06:25,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-01-31 17:06:25,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:06:25,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-01-31 17:06:25,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2022-01-31 17:06:25,761 INFO L87 Difference]: Start difference. First operand 1701 states and 2374 transitions. Second operand has 88 states, 88 states have (on average 2.1136363636363638) internal successors, (186), 87 states have internal predecessors, (186), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:06:33,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:06:33,746 INFO L93 Difference]: Finished difference Result 3265 states and 4628 transitions. [2022-01-31 17:06:33,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-01-31 17:06:33,746 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.1136363636363638) internal successors, (186), 87 states have internal predecessors, (186), 2 states have call successors, (3), 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 193 [2022-01-31 17:06:33,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:06:33,749 INFO L225 Difference]: With dead ends: 3265 [2022-01-31 17:06:33,749 INFO L226 Difference]: Without dead ends: 1739 [2022-01-31 17:06:33,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3654 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=11223, Invalid=18533, Unknown=0, NotChecked=0, Total=29756 [2022-01-31 17:06:33,751 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 8297 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 3067 mSolverCounterSat, 1580 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8300 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 4647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1580 IncrementalHoareTripleChecker+Valid, 3067 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:06:33,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8300 Valid, 52 Invalid, 4647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1580 Valid, 3067 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-01-31 17:06:33,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1739 states. [2022-01-31 17:06:34,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1739 to 1721. [2022-01-31 17:06:34,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1721 states, 1546 states have (on average 1.331824062095731) internal successors, (2059), 1546 states have internal predecessors, (2059), 172 states have call successors, (172), 3 states have call predecessors, (172), 2 states have return successors, (171), 171 states have call predecessors, (171), 171 states have call successors, (171) [2022-01-31 17:06:34,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1721 states to 1721 states and 2402 transitions. [2022-01-31 17:06:34,497 INFO L78 Accepts]: Start accepts. Automaton has 1721 states and 2402 transitions. Word has length 193 [2022-01-31 17:06:34,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:06:34,497 INFO L470 AbstractCegarLoop]: Abstraction has 1721 states and 2402 transitions. [2022-01-31 17:06:34,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 2.1136363636363638) internal successors, (186), 87 states have internal predecessors, (186), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:06:34,497 INFO L276 IsEmpty]: Start isEmpty. Operand 1721 states and 2402 transitions. [2022-01-31 17:06:34,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-01-31 17:06:34,498 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:06:34,498 INFO L514 BasicCegarLoop]: trace histogram [85, 85, 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 17:06:34,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-01-31 17:06:34,498 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:06:34,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:06:34,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1452710644, now seen corresponding path program 84 times [2022-01-31 17:06:34,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:06:34,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [109345735] [2022-01-31 17:06:34,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:06:34,500 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:06:34,500 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:06:34,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:06:34,503 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:06:34,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:36,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:06:36,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:36,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:06:36,855 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:06:36,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [109345735] [2022-01-31 17:06:36,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [109345735] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:06:36,855 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:06:36,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-01-31 17:06:36,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485541571] [2022-01-31 17:06:36,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:06:36,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-01-31 17:06:36,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:06:36,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-01-31 17:06:36,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3830, Invalid=4002, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 17:06:36,857 INFO L87 Difference]: Start difference. First operand 1721 states and 2402 transitions. Second operand has 89 states, 89 states have (on average 2.1123595505617976) internal successors, (188), 88 states have internal predecessors, (188), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:06:44,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:06:44,235 INFO L93 Difference]: Finished difference Result 3303 states and 4682 transitions. [2022-01-31 17:06:44,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-31 17:06:44,235 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.1123595505617976) internal successors, (188), 88 states have internal predecessors, (188), 2 states have call successors, (3), 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 17:06:44,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:06:44,238 INFO L225 Difference]: With dead ends: 3303 [2022-01-31 17:06:44,238 INFO L226 Difference]: Without dead ends: 1759 [2022-01-31 17:06:44,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3740 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=11484, Invalid=18966, Unknown=0, NotChecked=0, Total=30450 [2022-01-31 17:06:44,253 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 8200 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 3285 mSolverCounterSat, 1575 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8203 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 4860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1575 IncrementalHoareTripleChecker+Valid, 3285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:06:44,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8203 Valid, 58 Invalid, 4860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1575 Valid, 3285 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-01-31 17:06:44,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1759 states. [2022-01-31 17:06:45,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1759 to 1741. [2022-01-31 17:06:45,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1741 states, 1564 states have (on average 1.331841432225064) internal successors, (2083), 1564 states have internal predecessors, (2083), 174 states have call successors, (174), 3 states have call predecessors, (174), 2 states have return successors, (173), 173 states have call predecessors, (173), 173 states have call successors, (173) [2022-01-31 17:06:45,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1741 states to 1741 states and 2430 transitions. [2022-01-31 17:06:45,041 INFO L78 Accepts]: Start accepts. Automaton has 1741 states and 2430 transitions. Word has length 195 [2022-01-31 17:06:45,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:06:45,041 INFO L470 AbstractCegarLoop]: Abstraction has 1741 states and 2430 transitions. [2022-01-31 17:06:45,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.1123595505617976) internal successors, (188), 88 states have internal predecessors, (188), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:06:45,041 INFO L276 IsEmpty]: Start isEmpty. Operand 1741 states and 2430 transitions. [2022-01-31 17:06:45,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-01-31 17:06:45,042 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:06:45,042 INFO L514 BasicCegarLoop]: trace histogram [86, 86, 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 17:06:45,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-01-31 17:06:45,042 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:06:45,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:06:45,042 INFO L85 PathProgramCache]: Analyzing trace with hash -558252334, now seen corresponding path program 85 times [2022-01-31 17:06:45,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:06:45,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [625647789] [2022-01-31 17:06:45,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:06:45,044 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:06:45,044 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:06:45,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:06:45,048 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:06:45,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:47,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:06:47,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:47,321 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 17:06:47,321 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:06:47,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [625647789] [2022-01-31 17:06:47,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [625647789] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:06:47,322 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:06:47,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-01-31 17:06:47,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671073712] [2022-01-31 17:06:47,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:06:47,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-01-31 17:06:47,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:06:47,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-01-31 17:06:47,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3918, Invalid=4092, Unknown=0, NotChecked=0, Total=8010 [2022-01-31 17:06:47,324 INFO L87 Difference]: Start difference. First operand 1741 states and 2430 transitions. Second operand has 90 states, 90 states have (on average 2.111111111111111) internal successors, (190), 89 states have internal predecessors, (190), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:06:55,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:06:55,856 INFO L93 Difference]: Finished difference Result 3341 states and 4736 transitions. [2022-01-31 17:06:55,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-01-31 17:06:55,856 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.111111111111111) internal successors, (190), 89 states have internal predecessors, (190), 2 states have call successors, (3), 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 197 [2022-01-31 17:06:55,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:06:55,859 INFO L225 Difference]: With dead ends: 3341 [2022-01-31 17:06:55,859 INFO L226 Difference]: Without dead ends: 1779 [2022-01-31 17:06:55,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3827 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=11748, Invalid=19404, Unknown=0, NotChecked=0, Total=31152 [2022-01-31 17:06:55,862 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 7433 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 3447 mSolverCounterSat, 1446 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7436 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 4893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1446 IncrementalHoareTripleChecker+Valid, 3447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:06:55,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7436 Valid, 78 Invalid, 4893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1446 Valid, 3447 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-01-31 17:06:55,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1779 states. [2022-01-31 17:06:56,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1779 to 1761. [2022-01-31 17:06:56,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1761 states, 1582 states have (on average 1.331858407079646) internal successors, (2107), 1582 states have internal predecessors, (2107), 176 states have call successors, (176), 3 states have call predecessors, (176), 2 states have return successors, (175), 175 states have call predecessors, (175), 175 states have call successors, (175) [2022-01-31 17:06:56,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1761 states to 1761 states and 2458 transitions. [2022-01-31 17:06:56,656 INFO L78 Accepts]: Start accepts. Automaton has 1761 states and 2458 transitions. Word has length 197 [2022-01-31 17:06:56,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:06:56,657 INFO L470 AbstractCegarLoop]: Abstraction has 1761 states and 2458 transitions. [2022-01-31 17:06:56,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.111111111111111) internal successors, (190), 89 states have internal predecessors, (190), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:06:56,657 INFO L276 IsEmpty]: Start isEmpty. Operand 1761 states and 2458 transitions. [2022-01-31 17:06:56,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-01-31 17:06:56,657 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:06:56,657 INFO L514 BasicCegarLoop]: trace histogram [87, 87, 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 17:06:56,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2022-01-31 17:06:56,658 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:06:56,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:06:56,658 INFO L85 PathProgramCache]: Analyzing trace with hash -358390992, now seen corresponding path program 86 times [2022-01-31 17:06:56,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:06:56,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [669965792] [2022-01-31 17:06:56,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:06:56,660 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:06:56,660 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:06:56,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:06:56,680 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:06:56,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:59,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:06:59,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:59,102 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 17:06:59,102 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:06:59,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [669965792] [2022-01-31 17:06:59,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [669965792] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:06:59,103 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:06:59,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-01-31 17:06:59,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196468275] [2022-01-31 17:06:59,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:06:59,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-01-31 17:06:59,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:06:59,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-01-31 17:06:59,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4007, Invalid=4183, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 17:06:59,105 INFO L87 Difference]: Start difference. First operand 1761 states and 2458 transitions. Second operand has 91 states, 91 states have (on average 2.10989010989011) internal successors, (192), 90 states have internal predecessors, (192), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:07:07,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:07:07,326 INFO L93 Difference]: Finished difference Result 3379 states and 4790 transitions. [2022-01-31 17:07:07,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-01-31 17:07:07,327 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.10989010989011) internal successors, (192), 90 states have internal predecessors, (192), 2 states have call successors, (3), 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 17:07:07,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:07:07,329 INFO L225 Difference]: With dead ends: 3379 [2022-01-31 17:07:07,329 INFO L226 Difference]: Without dead ends: 1799 [2022-01-31 17:07:07,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3915 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=12015, Invalid=19847, Unknown=0, NotChecked=0, Total=31862 [2022-01-31 17:07:07,332 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 7602 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 3427 mSolverCounterSat, 1473 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7605 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 4900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1473 IncrementalHoareTripleChecker+Valid, 3427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:07:07,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7605 Valid, 89 Invalid, 4900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1473 Valid, 3427 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-01-31 17:07:07,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1799 states. [2022-01-31 17:07:08,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1799 to 1781. [2022-01-31 17:07:08,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1781 states, 1600 states have (on average 1.331875) internal successors, (2131), 1600 states have internal predecessors, (2131), 178 states have call successors, (178), 3 states have call predecessors, (178), 2 states have return successors, (177), 177 states have call predecessors, (177), 177 states have call successors, (177) [2022-01-31 17:07:08,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1781 states to 1781 states and 2486 transitions. [2022-01-31 17:07:08,128 INFO L78 Accepts]: Start accepts. Automaton has 1781 states and 2486 transitions. Word has length 199 [2022-01-31 17:07:08,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:07:08,128 INFO L470 AbstractCegarLoop]: Abstraction has 1781 states and 2486 transitions. [2022-01-31 17:07:08,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.10989010989011) internal successors, (192), 90 states have internal predecessors, (192), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:07:08,128 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states and 2486 transitions. [2022-01-31 17:07:08,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-01-31 17:07:08,128 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:07:08,129 INFO L514 BasicCegarLoop]: trace histogram [88, 88, 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 17:07:08,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2022-01-31 17:07:08,129 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:07:08,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:07:08,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1565169650, now seen corresponding path program 87 times [2022-01-31 17:07:08,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:07:08,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [954107816] [2022-01-31 17:07:08,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:07:08,130 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:07:08,130 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:07:08,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:07:08,134 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:07:08,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:10,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:07:10,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:10,629 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 17:07:10,629 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:07:10,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [954107816] [2022-01-31 17:07:10,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [954107816] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:07:10,629 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:07:10,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-01-31 17:07:10,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312250372] [2022-01-31 17:07:10,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:07:10,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-01-31 17:07:10,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:07:10,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-01-31 17:07:10,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2022-01-31 17:07:10,632 INFO L87 Difference]: Start difference. First operand 1781 states and 2486 transitions. Second operand has 92 states, 92 states have (on average 2.108695652173913) internal successors, (194), 91 states have internal predecessors, (194), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:07:19,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:07:19,814 INFO L93 Difference]: Finished difference Result 3417 states and 4844 transitions. [2022-01-31 17:07:19,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-01-31 17:07:19,814 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.108695652173913) internal successors, (194), 91 states have internal predecessors, (194), 2 states have call successors, (3), 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 201 [2022-01-31 17:07:19,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:07:19,817 INFO L225 Difference]: With dead ends: 3417 [2022-01-31 17:07:19,817 INFO L226 Difference]: Without dead ends: 1819 [2022-01-31 17:07:19,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4004 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=12285, Invalid=20295, Unknown=0, NotChecked=0, Total=32580 [2022-01-31 17:07:19,820 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 7803 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 3389 mSolverCounterSat, 1506 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7806 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 4895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1506 IncrementalHoareTripleChecker+Valid, 3389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:07:19,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7806 Valid, 75 Invalid, 4895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1506 Valid, 3389 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-01-31 17:07:19,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1819 states. [2022-01-31 17:07:20,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1819 to 1801. [2022-01-31 17:07:20,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1801 states, 1618 states have (on average 1.3318912237330036) internal successors, (2155), 1618 states have internal predecessors, (2155), 180 states have call successors, (180), 3 states have call predecessors, (180), 2 states have return successors, (179), 179 states have call predecessors, (179), 179 states have call successors, (179) [2022-01-31 17:07:20,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1801 states to 1801 states and 2514 transitions. [2022-01-31 17:07:20,678 INFO L78 Accepts]: Start accepts. Automaton has 1801 states and 2514 transitions. Word has length 201 [2022-01-31 17:07:20,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:07:20,678 INFO L470 AbstractCegarLoop]: Abstraction has 1801 states and 2514 transitions. [2022-01-31 17:07:20,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.108695652173913) internal successors, (194), 91 states have internal predecessors, (194), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:07:20,678 INFO L276 IsEmpty]: Start isEmpty. Operand 1801 states and 2514 transitions. [2022-01-31 17:07:20,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-01-31 17:07:20,679 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:07:20,679 INFO L514 BasicCegarLoop]: trace histogram [89, 89, 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 17:07:20,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2022-01-31 17:07:20,679 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:07:20,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:07:20,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1638290068, now seen corresponding path program 88 times [2022-01-31 17:07:20,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:07:20,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1495649707] [2022-01-31 17:07:20,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:07:20,681 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:07:20,681 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:07:20,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:07:20,685 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:07:20,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:23,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:07:23,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:23,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:07:23,225 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:07:23,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1495649707] [2022-01-31 17:07:23,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1495649707] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:07:23,225 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:07:23,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-01-31 17:07:23,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294860443] [2022-01-31 17:07:23,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:07:23,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-01-31 17:07:23,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:07:23,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-01-31 17:07:23,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4188, Invalid=4368, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 17:07:23,228 INFO L87 Difference]: Start difference. First operand 1801 states and 2514 transitions. Second operand has 93 states, 93 states have (on average 2.10752688172043) internal successors, (196), 92 states have internal predecessors, (196), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:07:32,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:07:32,645 INFO L93 Difference]: Finished difference Result 3455 states and 4898 transitions. [2022-01-31 17:07:32,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-01-31 17:07:32,646 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 2.10752688172043) internal successors, (196), 92 states have internal predecessors, (196), 2 states have call successors, (3), 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 17:07:32,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:07:32,648 INFO L225 Difference]: With dead ends: 3455 [2022-01-31 17:07:32,648 INFO L226 Difference]: Without dead ends: 1839 [2022-01-31 17:07:32,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4094 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=12558, Invalid=20748, Unknown=0, NotChecked=0, Total=33306 [2022-01-31 17:07:32,651 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 7343 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 3631 mSolverCounterSat, 1439 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7346 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 5070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1439 IncrementalHoareTripleChecker+Valid, 3631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:07:32,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7346 Valid, 89 Invalid, 5070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1439 Valid, 3631 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-01-31 17:07:32,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1839 states. [2022-01-31 17:07:33,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1839 to 1821. [2022-01-31 17:07:33,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1821 states, 1636 states have (on average 1.3319070904645476) internal successors, (2179), 1636 states have internal predecessors, (2179), 182 states have call successors, (182), 3 states have call predecessors, (182), 2 states have return successors, (181), 181 states have call predecessors, (181), 181 states have call successors, (181) [2022-01-31 17:07:33,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1821 states to 1821 states and 2542 transitions. [2022-01-31 17:07:33,502 INFO L78 Accepts]: Start accepts. Automaton has 1821 states and 2542 transitions. Word has length 203 [2022-01-31 17:07:33,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:07:33,502 INFO L470 AbstractCegarLoop]: Abstraction has 1821 states and 2542 transitions. [2022-01-31 17:07:33,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 2.10752688172043) internal successors, (196), 92 states have internal predecessors, (196), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:07:33,502 INFO L276 IsEmpty]: Start isEmpty. Operand 1821 states and 2542 transitions. [2022-01-31 17:07:33,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-01-31 17:07:33,502 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:07:33,503 INFO L514 BasicCegarLoop]: trace histogram [90, 90, 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 17:07:33,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2022-01-31 17:07:33,503 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:07:33,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:07:33,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1107432266, now seen corresponding path program 89 times [2022-01-31 17:07:33,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:07:33,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1000547681] [2022-01-31 17:07:33,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:07:33,504 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:07:33,504 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:07:33,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:07:33,508 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:07:33,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:36,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:07:36,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:36,137 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 17:07:36,137 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:07:36,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1000547681] [2022-01-31 17:07:36,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1000547681] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:07:36,137 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:07:36,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-01-31 17:07:36,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490574372] [2022-01-31 17:07:36,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:07:36,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-01-31 17:07:36,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:07:36,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-01-31 17:07:36,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4280, Invalid=4462, Unknown=0, NotChecked=0, Total=8742 [2022-01-31 17:07:36,140 INFO L87 Difference]: Start difference. First operand 1821 states and 2542 transitions. Second operand has 94 states, 94 states have (on average 2.106382978723404) internal successors, (198), 93 states have internal predecessors, (198), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:07:45,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:07:45,597 INFO L93 Difference]: Finished difference Result 3493 states and 4952 transitions. [2022-01-31 17:07:45,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-01-31 17:07:45,597 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.106382978723404) internal successors, (198), 93 states have internal predecessors, (198), 2 states have call successors, (3), 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 205 [2022-01-31 17:07:45,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:07:45,600 INFO L225 Difference]: With dead ends: 3493 [2022-01-31 17:07:45,600 INFO L226 Difference]: Without dead ends: 1859 [2022-01-31 17:07:45,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4185 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=12834, Invalid=21206, Unknown=0, NotChecked=0, Total=34040 [2022-01-31 17:07:45,603 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 7925 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 3561 mSolverCounterSat, 1538 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7928 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 5099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1538 IncrementalHoareTripleChecker+Valid, 3561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:07:45,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7928 Valid, 66 Invalid, 5099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1538 Valid, 3561 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-01-31 17:07:45,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1859 states. [2022-01-31 17:07:46,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1859 to 1841. [2022-01-31 17:07:46,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1841 states, 1654 states have (on average 1.3319226118500604) internal successors, (2203), 1654 states have internal predecessors, (2203), 184 states have call successors, (184), 3 states have call predecessors, (184), 2 states have return successors, (183), 183 states have call predecessors, (183), 183 states have call successors, (183) [2022-01-31 17:07:46,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1841 states to 1841 states and 2570 transitions. [2022-01-31 17:07:46,470 INFO L78 Accepts]: Start accepts. Automaton has 1841 states and 2570 transitions. Word has length 205 [2022-01-31 17:07:46,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:07:46,470 INFO L470 AbstractCegarLoop]: Abstraction has 1841 states and 2570 transitions. [2022-01-31 17:07:46,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 2.106382978723404) internal successors, (198), 93 states have internal predecessors, (198), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:07:46,471 INFO L276 IsEmpty]: Start isEmpty. Operand 1841 states and 2570 transitions. [2022-01-31 17:07:46,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-01-31 17:07:46,471 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:07:46,471 INFO L514 BasicCegarLoop]: trace histogram [91, 91, 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 17:07:46,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2022-01-31 17:07:46,471 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:07:46,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:07:46,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1658291800, now seen corresponding path program 90 times [2022-01-31 17:07:46,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:07:46,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1448479360] [2022-01-31 17:07:46,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:07:46,473 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:07:46,473 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:07:46,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:07:46,477 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:07:46,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:48,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:07:48,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:48,902 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 17:07:48,902 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:07:48,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1448479360] [2022-01-31 17:07:48,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1448479360] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:07:48,902 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:07:48,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-01-31 17:07:48,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295974192] [2022-01-31 17:07:48,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:07:48,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-01-31 17:07:48,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:07:48,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-01-31 17:07:48,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4373, Invalid=4557, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 17:07:48,905 INFO L87 Difference]: Start difference. First operand 1841 states and 2570 transitions. Second operand has 95 states, 95 states have (on average 2.1052631578947367) internal successors, (200), 94 states have internal predecessors, (200), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:07:58,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:07:58,048 INFO L93 Difference]: Finished difference Result 3531 states and 5006 transitions. [2022-01-31 17:07:58,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-01-31 17:07:58,048 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.1052631578947367) internal successors, (200), 94 states have internal predecessors, (200), 2 states have call successors, (3), 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 17:07:58,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:07:58,051 INFO L225 Difference]: With dead ends: 3531 [2022-01-31 17:07:58,051 INFO L226 Difference]: Without dead ends: 1879 [2022-01-31 17:07:58,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4277 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=13113, Invalid=21669, Unknown=0, NotChecked=0, Total=34782 [2022-01-31 17:07:58,054 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 8483 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 3371 mSolverCounterSat, 1632 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8486 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 5003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1632 IncrementalHoareTripleChecker+Valid, 3371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:07:58,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8486 Valid, 65 Invalid, 5003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1632 Valid, 3371 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-01-31 17:07:58,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1879 states. [2022-01-31 17:07:58,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1879 to 1861. [2022-01-31 17:07:58,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1861 states, 1672 states have (on average 1.3319377990430623) internal successors, (2227), 1672 states have internal predecessors, (2227), 186 states have call successors, (186), 3 states have call predecessors, (186), 2 states have return successors, (185), 185 states have call predecessors, (185), 185 states have call successors, (185) [2022-01-31 17:07:58,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1861 states to 1861 states and 2598 transitions. [2022-01-31 17:07:58,946 INFO L78 Accepts]: Start accepts. Automaton has 1861 states and 2598 transitions. Word has length 207 [2022-01-31 17:07:58,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:07:58,946 INFO L470 AbstractCegarLoop]: Abstraction has 1861 states and 2598 transitions. [2022-01-31 17:07:58,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.1052631578947367) internal successors, (200), 94 states have internal predecessors, (200), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:07:58,946 INFO L276 IsEmpty]: Start isEmpty. Operand 1861 states and 2598 transitions. [2022-01-31 17:07:58,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-01-31 17:07:58,947 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:07:58,947 INFO L514 BasicCegarLoop]: trace histogram [92, 92, 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 17:07:58,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2022-01-31 17:07:58,947 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:07:58,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:07:58,947 INFO L85 PathProgramCache]: Analyzing trace with hash -934363002, now seen corresponding path program 91 times [2022-01-31 17:07:58,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:07:58,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [267446477] [2022-01-31 17:07:58,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:07:58,949 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:07:58,949 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:07:58,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:07:58,953 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:07:58,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:01,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:08:01,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:01,405 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 17:08:01,405 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:08:01,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [267446477] [2022-01-31 17:08:01,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [267446477] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:08:01,405 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:08:01,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-01-31 17:08:01,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247156587] [2022-01-31 17:08:01,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:08:01,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-01-31 17:08:01,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:08:01,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-01-31 17:08:01,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2022-01-31 17:08:01,408 INFO L87 Difference]: Start difference. First operand 1861 states and 2598 transitions. Second operand has 96 states, 96 states have (on average 2.1041666666666665) internal successors, (202), 95 states have internal predecessors, (202), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:08:10,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:08:10,825 INFO L93 Difference]: Finished difference Result 3569 states and 5060 transitions. [2022-01-31 17:08:10,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-01-31 17:08:10,825 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.1041666666666665) internal successors, (202), 95 states have internal predecessors, (202), 2 states have call successors, (3), 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 209 [2022-01-31 17:08:10,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:08:10,828 INFO L225 Difference]: With dead ends: 3569 [2022-01-31 17:08:10,828 INFO L226 Difference]: Without dead ends: 1899 [2022-01-31 17:08:10,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4370 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=13395, Invalid=22137, Unknown=0, NotChecked=0, Total=35532 [2022-01-31 17:08:10,831 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 10094 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 3579 mSolverCounterSat, 1901 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10097 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 5480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1901 IncrementalHoareTripleChecker+Valid, 3579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:08:10,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10097 Valid, 59 Invalid, 5480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1901 Valid, 3579 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-01-31 17:08:10,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1899 states. [2022-01-31 17:08:11,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1899 to 1881. [2022-01-31 17:08:11,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1881 states, 1690 states have (on average 1.3319526627218934) internal successors, (2251), 1690 states have internal predecessors, (2251), 188 states have call successors, (188), 3 states have call predecessors, (188), 2 states have return successors, (187), 187 states have call predecessors, (187), 187 states have call successors, (187) [2022-01-31 17:08:11,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1881 states to 1881 states and 2626 transitions. [2022-01-31 17:08:11,729 INFO L78 Accepts]: Start accepts. Automaton has 1881 states and 2626 transitions. Word has length 209 [2022-01-31 17:08:11,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:08:11,730 INFO L470 AbstractCegarLoop]: Abstraction has 1881 states and 2626 transitions. [2022-01-31 17:08:11,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.1041666666666665) internal successors, (202), 95 states have internal predecessors, (202), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:08:11,730 INFO L276 IsEmpty]: Start isEmpty. Operand 1881 states and 2626 transitions. [2022-01-31 17:08:11,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-01-31 17:08:11,730 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:08:11,731 INFO L514 BasicCegarLoop]: trace histogram [93, 93, 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 17:08:11,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2022-01-31 17:08:11,731 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:08:11,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:08:11,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1023490076, now seen corresponding path program 92 times [2022-01-31 17:08:11,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:08:11,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [626988934] [2022-01-31 17:08:11,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:08:11,732 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:08:11,732 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:08:11,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:08:11,736 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:08:11,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:14,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:08:14,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:14,535 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 17:08:14,536 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:08:14,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [626988934] [2022-01-31 17:08:14,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [626988934] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:08:14,536 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:08:14,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-01-31 17:08:14,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165272971] [2022-01-31 17:08:14,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:08:14,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-01-31 17:08:14,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:08:14,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-01-31 17:08:14,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4562, Invalid=4750, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 17:08:14,538 INFO L87 Difference]: Start difference. First operand 1881 states and 2626 transitions. Second operand has 97 states, 97 states have (on average 2.1030927835051547) internal successors, (204), 96 states have internal predecessors, (204), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:08:25,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:08:25,327 INFO L93 Difference]: Finished difference Result 3607 states and 5114 transitions. [2022-01-31 17:08:25,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-31 17:08:25,328 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.1030927835051547) internal successors, (204), 96 states have internal predecessors, (204), 2 states have call successors, (3), 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 17:08:25,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:08:25,330 INFO L225 Difference]: With dead ends: 3607 [2022-01-31 17:08:25,330 INFO L226 Difference]: Without dead ends: 1919 [2022-01-31 17:08:25,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4464 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=13680, Invalid=22610, Unknown=0, NotChecked=0, Total=36290 [2022-01-31 17:08:25,333 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 9052 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 3563 mSolverCounterSat, 1731 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9055 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 5294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1731 IncrementalHoareTripleChecker+Valid, 3563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:08:25,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9055 Valid, 69 Invalid, 5294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1731 Valid, 3563 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-01-31 17:08:25,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1919 states. [2022-01-31 17:08:26,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1919 to 1901. [2022-01-31 17:08:26,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1901 states, 1708 states have (on average 1.3319672131147542) internal successors, (2275), 1708 states have internal predecessors, (2275), 190 states have call successors, (190), 3 states have call predecessors, (190), 2 states have return successors, (189), 189 states have call predecessors, (189), 189 states have call successors, (189) [2022-01-31 17:08:26,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1901 states to 1901 states and 2654 transitions. [2022-01-31 17:08:26,260 INFO L78 Accepts]: Start accepts. Automaton has 1901 states and 2654 transitions. Word has length 211 [2022-01-31 17:08:26,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:08:26,260 INFO L470 AbstractCegarLoop]: Abstraction has 1901 states and 2654 transitions. [2022-01-31 17:08:26,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.1030927835051547) internal successors, (204), 96 states have internal predecessors, (204), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:08:26,260 INFO L276 IsEmpty]: Start isEmpty. Operand 1901 states and 2654 transitions. [2022-01-31 17:08:26,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-01-31 17:08:26,261 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:08:26,261 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 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 17:08:26,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2022-01-31 17:08:26,261 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:08:26,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:08:26,262 INFO L85 PathProgramCache]: Analyzing trace with hash -775262270, now seen corresponding path program 93 times [2022-01-31 17:08:26,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:08:26,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [799761006] [2022-01-31 17:08:26,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:08:26,263 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:08:26,263 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:08:26,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:08:26,268 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:08:26,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:29,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:08:29,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:29,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:08:29,109 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:08:29,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [799761006] [2022-01-31 17:08:29,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [799761006] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:08:29,109 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:08:29,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-01-31 17:08:29,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282761091] [2022-01-31 17:08:29,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:08:29,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-01-31 17:08:29,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:08:29,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-01-31 17:08:29,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 17:08:29,111 INFO L87 Difference]: Start difference. First operand 1901 states and 2654 transitions. Second operand has 98 states, 98 states have (on average 2.1020408163265305) internal successors, (206), 97 states have internal predecessors, (206), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:08:39,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:08:39,736 INFO L93 Difference]: Finished difference Result 3645 states and 5168 transitions. [2022-01-31 17:08:39,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-01-31 17:08:39,737 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.1020408163265305) internal successors, (206), 97 states have internal predecessors, (206), 2 states have call successors, (3), 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 213 [2022-01-31 17:08:39,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:08:39,740 INFO L225 Difference]: With dead ends: 3645 [2022-01-31 17:08:39,740 INFO L226 Difference]: Without dead ends: 1939 [2022-01-31 17:08:39,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4559 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=13968, Invalid=23088, Unknown=0, NotChecked=0, Total=37056 [2022-01-31 17:08:39,743 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 9122 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 3471 mSolverCounterSat, 1751 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9125 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 5222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1751 IncrementalHoareTripleChecker+Valid, 3471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:08:39,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9125 Valid, 71 Invalid, 5222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1751 Valid, 3471 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-01-31 17:08:39,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1939 states. [2022-01-31 17:08:40,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1939 to 1921. [2022-01-31 17:08:40,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1921 states, 1726 states have (on average 1.331981460023175) internal successors, (2299), 1726 states have internal predecessors, (2299), 192 states have call successors, (192), 3 states have call predecessors, (192), 2 states have return successors, (191), 191 states have call predecessors, (191), 191 states have call successors, (191) [2022-01-31 17:08:40,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1921 states to 1921 states and 2682 transitions. [2022-01-31 17:08:40,686 INFO L78 Accepts]: Start accepts. Automaton has 1921 states and 2682 transitions. Word has length 213 [2022-01-31 17:08:40,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:08:40,686 INFO L470 AbstractCegarLoop]: Abstraction has 1921 states and 2682 transitions. [2022-01-31 17:08:40,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.1020408163265305) internal successors, (206), 97 states have internal predecessors, (206), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:08:40,686 INFO L276 IsEmpty]: Start isEmpty. Operand 1921 states and 2682 transitions. [2022-01-31 17:08:40,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-01-31 17:08:40,687 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:08:40,687 INFO L514 BasicCegarLoop]: trace histogram [95, 95, 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 17:08:40,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2022-01-31 17:08:40,687 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:08:40,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:08:40,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1548458016, now seen corresponding path program 94 times [2022-01-31 17:08:40,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:08:40,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [911122428] [2022-01-31 17:08:40,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:08:40,689 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:08:40,689 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:08:40,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:08:40,694 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:08:40,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:43,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:08:43,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:43,567 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 17:08:43,567 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:08:43,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [911122428] [2022-01-31 17:08:43,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [911122428] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:08:43,567 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:08:43,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-01-31 17:08:43,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481037777] [2022-01-31 17:08:43,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:08:43,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-01-31 17:08:43,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:08:43,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-01-31 17:08:43,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4755, Invalid=4947, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 17:08:43,570 INFO L87 Difference]: Start difference. First operand 1921 states and 2682 transitions. Second operand has 99 states, 99 states have (on average 2.101010101010101) internal successors, (208), 98 states have internal predecessors, (208), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:08:54,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:08:54,052 INFO L93 Difference]: Finished difference Result 3683 states and 5222 transitions. [2022-01-31 17:08:54,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-01-31 17:08:54,052 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.101010101010101) internal successors, (208), 98 states have internal predecessors, (208), 2 states have call successors, (3), 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 17:08:54,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:08:54,055 INFO L225 Difference]: With dead ends: 3683 [2022-01-31 17:08:54,055 INFO L226 Difference]: Without dead ends: 1959 [2022-01-31 17:08:54,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4655 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=14259, Invalid=23571, Unknown=0, NotChecked=0, Total=37830 [2022-01-31 17:08:54,058 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 7883 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 3845 mSolverCounterSat, 1543 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7886 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 5388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1543 IncrementalHoareTripleChecker+Valid, 3845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:08:54,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7886 Valid, 74 Invalid, 5388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1543 Valid, 3845 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-01-31 17:08:54,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2022-01-31 17:08:55,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1941. [2022-01-31 17:08:55,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1941 states, 1744 states have (on average 1.3319954128440368) internal successors, (2323), 1744 states have internal predecessors, (2323), 194 states have call successors, (194), 3 states have call predecessors, (194), 2 states have return successors, (193), 193 states have call predecessors, (193), 193 states have call successors, (193) [2022-01-31 17:08:55,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1941 states to 1941 states and 2710 transitions. [2022-01-31 17:08:55,016 INFO L78 Accepts]: Start accepts. Automaton has 1941 states and 2710 transitions. Word has length 215 [2022-01-31 17:08:55,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:08:55,016 INFO L470 AbstractCegarLoop]: Abstraction has 1941 states and 2710 transitions. [2022-01-31 17:08:55,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.101010101010101) internal successors, (208), 98 states have internal predecessors, (208), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:08:55,016 INFO L276 IsEmpty]: Start isEmpty. Operand 1941 states and 2710 transitions. [2022-01-31 17:08:55,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2022-01-31 17:08:55,017 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:08:55,017 INFO L514 BasicCegarLoop]: trace histogram [96, 96, 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 17:08:55,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2022-01-31 17:08:55,017 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:08:55,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:08:55,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1260658942, now seen corresponding path program 95 times [2022-01-31 17:08:55,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:08:55,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1125657426] [2022-01-31 17:08:55,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:08:55,019 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:08:55,019 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:08:55,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:08:55,024 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:08:55,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:57,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:08:57,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:57,199 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 17:08:57,199 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:08:57,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1125657426] [2022-01-31 17:08:57,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1125657426] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:08:57,199 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:08:57,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-01-31 17:08:57,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962178806] [2022-01-31 17:08:57,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:08:57,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-01-31 17:08:57,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:08:57,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-01-31 17:08:57,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2022-01-31 17:08:57,202 INFO L87 Difference]: Start difference. First operand 1941 states and 2710 transitions. Second operand has 100 states, 100 states have (on average 2.1) internal successors, (210), 99 states have internal predecessors, (210), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:09:07,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:09:07,003 INFO L93 Difference]: Finished difference Result 3721 states and 5276 transitions. [2022-01-31 17:09:07,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-01-31 17:09:07,004 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.1) internal successors, (210), 99 states have internal predecessors, (210), 2 states have call successors, (3), 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 217 [2022-01-31 17:09:07,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:09:07,007 INFO L225 Difference]: With dead ends: 3721 [2022-01-31 17:09:07,007 INFO L226 Difference]: Without dead ends: 1979 [2022-01-31 17:09:07,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4752 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=14553, Invalid=24059, Unknown=0, NotChecked=0, Total=38612 [2022-01-31 17:09:07,010 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 10360 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 3755 mSolverCounterSat, 1967 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10363 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 5722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1967 IncrementalHoareTripleChecker+Valid, 3755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:09:07,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10363 Valid, 76 Invalid, 5722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1967 Valid, 3755 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-01-31 17:09:07,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1979 states. [2022-01-31 17:09:08,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1979 to 1961. [2022-01-31 17:09:08,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1961 states, 1762 states have (on average 1.3320090805902383) internal successors, (2347), 1762 states have internal predecessors, (2347), 196 states have call successors, (196), 3 states have call predecessors, (196), 2 states have return successors, (195), 195 states have call predecessors, (195), 195 states have call successors, (195) [2022-01-31 17:09:08,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1961 states to 1961 states and 2738 transitions. [2022-01-31 17:09:08,076 INFO L78 Accepts]: Start accepts. Automaton has 1961 states and 2738 transitions. Word has length 217 [2022-01-31 17:09:08,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:09:08,076 INFO L470 AbstractCegarLoop]: Abstraction has 1961 states and 2738 transitions. [2022-01-31 17:09:08,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 2.1) internal successors, (210), 99 states have internal predecessors, (210), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:09:08,076 INFO L276 IsEmpty]: Start isEmpty. Operand 1961 states and 2738 transitions. [2022-01-31 17:09:08,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-01-31 17:09:08,077 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:09:08,077 INFO L514 BasicCegarLoop]: trace histogram [97, 97, 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 17:09:08,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2022-01-31 17:09:08,077 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:09:08,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:09:08,077 INFO L85 PathProgramCache]: Analyzing trace with hash -436344228, now seen corresponding path program 96 times [2022-01-31 17:09:08,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:09:08,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1014644896] [2022-01-31 17:09:08,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:09:08,078 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:09:08,078 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:09:08,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:09:08,083 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:09:08,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:09:11,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:09:11,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:09:11,118 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 17:09:11,118 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:09:11,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1014644896] [2022-01-31 17:09:11,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1014644896] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:09:11,119 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:09:11,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-01-31 17:09:11,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902784127] [2022-01-31 17:09:11,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:09:11,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-01-31 17:09:11,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:09:11,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-01-31 17:09:11,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4952, Invalid=5148, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 17:09:11,121 INFO L87 Difference]: Start difference. First operand 1961 states and 2738 transitions. Second operand has 101 states, 101 states have (on average 2.099009900990099) internal successors, (212), 100 states have internal predecessors, (212), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:09:21,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:09:21,689 INFO L93 Difference]: Finished difference Result 3759 states and 5330 transitions. [2022-01-31 17:09:21,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-01-31 17:09:21,689 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.099009900990099) internal successors, (212), 100 states have internal predecessors, (212), 2 states have call successors, (3), 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 17:09:21,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:09:21,692 INFO L225 Difference]: With dead ends: 3759 [2022-01-31 17:09:21,692 INFO L226 Difference]: Without dead ends: 1999 [2022-01-31 17:09:21,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4850 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=14850, Invalid=24552, Unknown=0, NotChecked=0, Total=39402 [2022-01-31 17:09:21,696 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 8889 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 3621 mSolverCounterSat, 1715 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8892 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 5336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1715 IncrementalHoareTripleChecker+Valid, 3621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:09:21,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8892 Valid, 68 Invalid, 5336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1715 Valid, 3621 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-01-31 17:09:21,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1999 states. [2022-01-31 17:09:22,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1999 to 1981. [2022-01-31 17:09:22,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1981 states, 1780 states have (on average 1.3320224719101124) internal successors, (2371), 1780 states have internal predecessors, (2371), 198 states have call successors, (198), 3 states have call predecessors, (198), 2 states have return successors, (197), 197 states have call predecessors, (197), 197 states have call successors, (197) [2022-01-31 17:09:22,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1981 states to 1981 states and 2766 transitions. [2022-01-31 17:09:22,718 INFO L78 Accepts]: Start accepts. Automaton has 1981 states and 2766 transitions. Word has length 219 [2022-01-31 17:09:22,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:09:22,718 INFO L470 AbstractCegarLoop]: Abstraction has 1981 states and 2766 transitions. [2022-01-31 17:09:22,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.099009900990099) internal successors, (212), 100 states have internal predecessors, (212), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:09:22,718 INFO L276 IsEmpty]: Start isEmpty. Operand 1981 states and 2766 transitions. [2022-01-31 17:09:22,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-01-31 17:09:22,719 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:09:22,719 INFO L514 BasicCegarLoop]: trace histogram [98, 98, 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 17:09:22,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2022-01-31 17:09:22,719 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:09:22,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:09:22,719 INFO L85 PathProgramCache]: Analyzing trace with hash 831181882, now seen corresponding path program 97 times [2022-01-31 17:09:22,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:09:22,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [315249142] [2022-01-31 17:09:22,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:09:22,731 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:09:22,731 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:09:22,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:09:22,736 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:09:22,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:09:25,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:09:25,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:09:25,728 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 17:09:25,728 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:09:25,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [315249142] [2022-01-31 17:09:25,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [315249142] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:09:25,728 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:09:25,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2022-01-31 17:09:25,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766421594] [2022-01-31 17:09:25,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:09:25,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-01-31 17:09:25,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:09:25,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-01-31 17:09:25,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2022-01-31 17:09:25,732 INFO L87 Difference]: Start difference. First operand 1981 states and 2766 transitions. Second operand has 102 states, 102 states have (on average 2.0980392156862746) internal successors, (214), 101 states have internal predecessors, (214), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:09:35,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:09:35,894 INFO L93 Difference]: Finished difference Result 3797 states and 5384 transitions. [2022-01-31 17:09:35,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-01-31 17:09:35,894 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.0980392156862746) internal successors, (214), 101 states have internal predecessors, (214), 2 states have call successors, (3), 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 221 [2022-01-31 17:09:35,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:09:35,897 INFO L225 Difference]: With dead ends: 3797 [2022-01-31 17:09:35,897 INFO L226 Difference]: Without dead ends: 2019 [2022-01-31 17:09:35,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4949 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=15150, Invalid=25050, Unknown=0, NotChecked=0, Total=40200 [2022-01-31 17:09:35,901 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 8092 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 4255 mSolverCounterSat, 1577 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8095 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 5832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1577 IncrementalHoareTripleChecker+Valid, 4255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:09:35,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8095 Valid, 88 Invalid, 5832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1577 Valid, 4255 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-01-31 17:09:35,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2019 states. [2022-01-31 17:09:36,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2019 to 2001. [2022-01-31 17:09:36,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2001 states, 1798 states have (on average 1.332035595105673) internal successors, (2395), 1798 states have internal predecessors, (2395), 200 states have call successors, (200), 3 states have call predecessors, (200), 2 states have return successors, (199), 199 states have call predecessors, (199), 199 states have call successors, (199) [2022-01-31 17:09:36,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2001 states to 2001 states and 2794 transitions. [2022-01-31 17:09:36,946 INFO L78 Accepts]: Start accepts. Automaton has 2001 states and 2794 transitions. Word has length 221 [2022-01-31 17:09:36,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:09:36,947 INFO L470 AbstractCegarLoop]: Abstraction has 2001 states and 2794 transitions. [2022-01-31 17:09:36,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 2.0980392156862746) internal successors, (214), 101 states have internal predecessors, (214), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:09:36,947 INFO L276 IsEmpty]: Start isEmpty. Operand 2001 states and 2794 transitions. [2022-01-31 17:09:36,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2022-01-31 17:09:36,947 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:09:36,948 INFO L514 BasicCegarLoop]: trace histogram [99, 99, 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 17:09:36,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2022-01-31 17:09:36,948 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:09:36,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:09:36,948 INFO L85 PathProgramCache]: Analyzing trace with hash -846938472, now seen corresponding path program 98 times [2022-01-31 17:09:36,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:09:36,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [244091921] [2022-01-31 17:09:36,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:09:36,950 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:09:36,950 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:09:36,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:09:36,955 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:09:36,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:09:39,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:09:39,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:09:39,477 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 17:09:39,477 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:09:39,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [244091921] [2022-01-31 17:09:39,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [244091921] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:09:39,477 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:09:39,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2022-01-31 17:09:39,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554140530] [2022-01-31 17:09:39,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:09:39,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-01-31 17:09:39,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:09:39,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-01-31 17:09:39,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 17:09:39,480 INFO L87 Difference]: Start difference. First operand 2001 states and 2794 transitions. Second operand has 103 states, 103 states have (on average 2.0970873786407767) internal successors, (216), 102 states have internal predecessors, (216), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:09:49,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:09:49,843 INFO L93 Difference]: Finished difference Result 3835 states and 5438 transitions. [2022-01-31 17:09:49,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-01-31 17:09:49,844 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 2.0970873786407767) internal successors, (216), 102 states have internal predecessors, (216), 2 states have call successors, (3), 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 17:09:49,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:09:49,846 INFO L225 Difference]: With dead ends: 3835 [2022-01-31 17:09:49,846 INFO L226 Difference]: Without dead ends: 2039 [2022-01-31 17:09:49,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5049 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=15453, Invalid=25553, Unknown=0, NotChecked=0, Total=41006 [2022-01-31 17:09:49,850 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 9376 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 3719 mSolverCounterSat, 1808 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9379 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 5527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1808 IncrementalHoareTripleChecker+Valid, 3719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:09:49,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9379 Valid, 66 Invalid, 5527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1808 Valid, 3719 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-01-31 17:09:49,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2039 states. [2022-01-31 17:09:50,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2039 to 2021. [2022-01-31 17:09:50,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2021 states, 1816 states have (on average 1.3320484581497798) internal successors, (2419), 1816 states have internal predecessors, (2419), 202 states have call successors, (202), 3 states have call predecessors, (202), 2 states have return successors, (201), 201 states have call predecessors, (201), 201 states have call successors, (201) [2022-01-31 17:09:50,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2021 states to 2021 states and 2822 transitions. [2022-01-31 17:09:50,895 INFO L78 Accepts]: Start accepts. Automaton has 2021 states and 2822 transitions. Word has length 223 [2022-01-31 17:09:50,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:09:50,895 INFO L470 AbstractCegarLoop]: Abstraction has 2021 states and 2822 transitions. [2022-01-31 17:09:50,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 2.0970873786407767) internal successors, (216), 102 states have internal predecessors, (216), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:09:50,895 INFO L276 IsEmpty]: Start isEmpty. Operand 2021 states and 2822 transitions. [2022-01-31 17:09:50,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2022-01-31 17:09:50,896 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:09:50,896 INFO L514 BasicCegarLoop]: trace histogram [100, 100, 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 17:09:50,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2022-01-31 17:09:50,896 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:09:50,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:09:50,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1387104630, now seen corresponding path program 99 times [2022-01-31 17:09:50,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:09:50,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1444758923] [2022-01-31 17:09:50,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:09:50,897 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:09:50,897 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:09:50,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:09:50,903 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:09:50,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:09:54,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:09:54,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:09:54,159 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 17:09:54,159 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:09:54,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1444758923] [2022-01-31 17:09:54,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1444758923] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:09:54,159 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:09:54,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2022-01-31 17:09:54,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692484567] [2022-01-31 17:09:54,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:09:54,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-01-31 17:09:54,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:09:54,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-01-31 17:09:54,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-01-31 17:09:54,162 INFO L87 Difference]: Start difference. First operand 2021 states and 2822 transitions. Second operand has 104 states, 104 states have (on average 2.0961538461538463) internal successors, (218), 103 states have internal predecessors, (218), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:10:06,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:10:06,301 INFO L93 Difference]: Finished difference Result 3873 states and 5492 transitions. [2022-01-31 17:10:06,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-01-31 17:10:06,301 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.0961538461538463) internal successors, (218), 103 states have internal predecessors, (218), 2 states have call successors, (3), 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 225 [2022-01-31 17:10:06,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:10:06,304 INFO L225 Difference]: With dead ends: 3873 [2022-01-31 17:10:06,304 INFO L226 Difference]: Without dead ends: 2059 [2022-01-31 17:10:06,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5150 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=15759, Invalid=26061, Unknown=0, NotChecked=0, Total=41820 [2022-01-31 17:10:06,308 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 9635 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 3763 mSolverCounterSat, 1848 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9638 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 5611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1848 IncrementalHoareTripleChecker+Valid, 3763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:10:06,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9638 Valid, 71 Invalid, 5611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1848 Valid, 3763 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-01-31 17:10:06,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2059 states. [2022-01-31 17:10:07,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2059 to 2041. [2022-01-31 17:10:07,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2041 states, 1834 states have (on average 1.33206106870229) internal successors, (2443), 1834 states have internal predecessors, (2443), 204 states have call successors, (204), 3 states have call predecessors, (204), 2 states have return successors, (203), 203 states have call predecessors, (203), 203 states have call successors, (203) [2022-01-31 17:10:07,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2041 states to 2041 states and 2850 transitions. [2022-01-31 17:10:07,396 INFO L78 Accepts]: Start accepts. Automaton has 2041 states and 2850 transitions. Word has length 225 [2022-01-31 17:10:07,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:10:07,396 INFO L470 AbstractCegarLoop]: Abstraction has 2041 states and 2850 transitions. [2022-01-31 17:10:07,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 2.0961538461538463) internal successors, (218), 103 states have internal predecessors, (218), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:10:07,396 INFO L276 IsEmpty]: Start isEmpty. Operand 2041 states and 2850 transitions. [2022-01-31 17:10:07,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2022-01-31 17:10:07,397 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:10:07,397 INFO L514 BasicCegarLoop]: trace histogram [101, 101, 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 17:10:07,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2022-01-31 17:10:07,397 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:10:07,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:10:07,397 INFO L85 PathProgramCache]: Analyzing trace with hash 818877652, now seen corresponding path program 100 times [2022-01-31 17:10:07,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:10:07,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [926870127] [2022-01-31 17:10:07,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:10:07,398 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:10:07,398 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:10:07,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:10:07,404 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:10:07,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:10:10,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:10:10,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:10:10,581 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 17:10:10,581 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:10:10,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [926870127] [2022-01-31 17:10:10,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [926870127] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:10:10,581 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:10:10,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2022-01-31 17:10:10,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408131297] [2022-01-31 17:10:10,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:10:10,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-01-31 17:10:10,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:10:10,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-01-31 17:10:10,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5358, Invalid=5562, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 17:10:10,585 INFO L87 Difference]: Start difference. First operand 2041 states and 2850 transitions. Second operand has 105 states, 105 states have (on average 2.0952380952380953) internal successors, (220), 104 states have internal predecessors, (220), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:10:23,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:10:23,247 INFO L93 Difference]: Finished difference Result 3911 states and 5546 transitions. [2022-01-31 17:10:23,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-01-31 17:10:23,247 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.0952380952380953) internal successors, (220), 104 states have internal predecessors, (220), 2 states have call successors, (3), 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 17:10:23,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:10:23,250 INFO L225 Difference]: With dead ends: 3911 [2022-01-31 17:10:23,250 INFO L226 Difference]: Without dead ends: 2079 [2022-01-31 17:10:23,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5252 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=16068, Invalid=26574, Unknown=0, NotChecked=0, Total=42642 [2022-01-31 17:10:23,253 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 9611 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 3929 mSolverCounterSat, 1848 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9614 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 5777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1848 IncrementalHoareTripleChecker+Valid, 3929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:10:23,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9614 Valid, 61 Invalid, 5777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1848 Valid, 3929 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-01-31 17:10:23,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2079 states. [2022-01-31 17:10:24,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2079 to 2061. [2022-01-31 17:10:24,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2061 states, 1852 states have (on average 1.33207343412527) internal successors, (2467), 1852 states have internal predecessors, (2467), 206 states have call successors, (206), 3 states have call predecessors, (206), 2 states have return successors, (205), 205 states have call predecessors, (205), 205 states have call successors, (205) [2022-01-31 17:10:24,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2061 states to 2061 states and 2878 transitions. [2022-01-31 17:10:24,387 INFO L78 Accepts]: Start accepts. Automaton has 2061 states and 2878 transitions. Word has length 227 [2022-01-31 17:10:24,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:10:24,387 INFO L470 AbstractCegarLoop]: Abstraction has 2061 states and 2878 transitions. [2022-01-31 17:10:24,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 2.0952380952380953) internal successors, (220), 104 states have internal predecessors, (220), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:10:24,387 INFO L276 IsEmpty]: Start isEmpty. Operand 2061 states and 2878 transitions. [2022-01-31 17:10:24,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2022-01-31 17:10:24,388 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:10:24,388 INFO L514 BasicCegarLoop]: trace histogram [102, 102, 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 17:10:24,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2022-01-31 17:10:24,388 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:10:24,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:10:24,389 INFO L85 PathProgramCache]: Analyzing trace with hash 213598386, now seen corresponding path program 101 times [2022-01-31 17:10:24,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:10:24,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [571989019] [2022-01-31 17:10:24,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:10:24,390 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:10:24,390 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:10:24,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:10:24,395 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:10:24,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:10:27,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:10:27,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:10:27,512 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 17:10:27,512 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:10:27,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [571989019] [2022-01-31 17:10:27,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [571989019] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:10:27,512 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:10:27,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2022-01-31 17:10:27,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392928207] [2022-01-31 17:10:27,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:10:27,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-01-31 17:10:27,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:10:27,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-01-31 17:10:27,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2022-01-31 17:10:27,514 INFO L87 Difference]: Start difference. First operand 2061 states and 2878 transitions. Second operand has 106 states, 106 states have (on average 2.0943396226415096) internal successors, (222), 105 states have internal predecessors, (222), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:10:40,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:10:40,367 INFO L93 Difference]: Finished difference Result 3949 states and 5600 transitions. [2022-01-31 17:10:40,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-01-31 17:10:40,368 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.0943396226415096) internal successors, (222), 105 states have internal predecessors, (222), 2 states have call successors, (3), 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 229 [2022-01-31 17:10:40,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:10:40,386 INFO L225 Difference]: With dead ends: 3949 [2022-01-31 17:10:40,386 INFO L226 Difference]: Without dead ends: 2099 [2022-01-31 17:10:40,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5355 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=16380, Invalid=27092, Unknown=0, NotChecked=0, Total=43472 [2022-01-31 17:10:40,399 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 11370 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 3979 mSolverCounterSat, 2159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11373 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 6138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2159 IncrementalHoareTripleChecker+Valid, 3979 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:10:40,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11373 Valid, 61 Invalid, 6138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2159 Valid, 3979 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-01-31 17:10:40,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2099 states. [2022-01-31 17:10:41,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2099 to 2081. [2022-01-31 17:10:41,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2081 states, 1870 states have (on average 1.3320855614973262) internal successors, (2491), 1870 states have internal predecessors, (2491), 208 states have call successors, (208), 3 states have call predecessors, (208), 2 states have return successors, (207), 207 states have call predecessors, (207), 207 states have call successors, (207) [2022-01-31 17:10:41,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2081 states to 2081 states and 2906 transitions. [2022-01-31 17:10:41,516 INFO L78 Accepts]: Start accepts. Automaton has 2081 states and 2906 transitions. Word has length 229 [2022-01-31 17:10:41,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:10:41,516 INFO L470 AbstractCegarLoop]: Abstraction has 2081 states and 2906 transitions. [2022-01-31 17:10:41,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 2.0943396226415096) internal successors, (222), 105 states have internal predecessors, (222), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:10:41,517 INFO L276 IsEmpty]: Start isEmpty. Operand 2081 states and 2906 transitions. [2022-01-31 17:10:41,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2022-01-31 17:10:41,517 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:10:41,518 INFO L514 BasicCegarLoop]: trace histogram [103, 103, 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 17:10:41,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2022-01-31 17:10:41,519 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:10:41,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:10:41,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1639191280, now seen corresponding path program 102 times [2022-01-31 17:10:41,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:10:41,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [190538810] [2022-01-31 17:10:41,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:10:41,520 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:10:41,520 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:10:41,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:10:41,525 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:10:41,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:10:44,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:10:44,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:10:44,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:10:44,691 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:10:44,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [190538810] [2022-01-31 17:10:44,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [190538810] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:10:44,692 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:10:44,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [107] imperfect sequences [] total 107 [2022-01-31 17:10:44,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290996934] [2022-01-31 17:10:44,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:10:44,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-01-31 17:10:44,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:10:44,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-01-31 17:10:44,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5567, Invalid=5775, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 17:10:44,695 INFO L87 Difference]: Start difference. First operand 2081 states and 2906 transitions. Second operand has 107 states, 107 states have (on average 2.0934579439252334) internal successors, (224), 106 states have internal predecessors, (224), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:10:57,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:10:57,440 INFO L93 Difference]: Finished difference Result 3987 states and 5654 transitions. [2022-01-31 17:10:57,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-01-31 17:10:57,441 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.0934579439252334) internal successors, (224), 106 states have internal predecessors, (224), 2 states have call successors, (3), 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 17:10:57,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:10:57,444 INFO L225 Difference]: With dead ends: 3987 [2022-01-31 17:10:57,444 INFO L226 Difference]: Without dead ends: 2119 [2022-01-31 17:10:57,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5459 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=16695, Invalid=27615, Unknown=0, NotChecked=0, Total=44310 [2022-01-31 17:10:57,447 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 11000 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 3781 mSolverCounterSat, 2102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11003 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 5883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2102 IncrementalHoareTripleChecker+Valid, 3781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:10:57,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11003 Valid, 66 Invalid, 5883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2102 Valid, 3781 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-01-31 17:10:57,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2119 states. [2022-01-31 17:10:58,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2119 to 2101. [2022-01-31 17:10:58,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2101 states, 1888 states have (on average 1.3320974576271187) internal successors, (2515), 1888 states have internal predecessors, (2515), 210 states have call successors, (210), 3 states have call predecessors, (210), 2 states have return successors, (209), 209 states have call predecessors, (209), 209 states have call successors, (209) [2022-01-31 17:10:58,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2101 states to 2101 states and 2934 transitions. [2022-01-31 17:10:58,596 INFO L78 Accepts]: Start accepts. Automaton has 2101 states and 2934 transitions. Word has length 231 [2022-01-31 17:10:58,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:10:58,596 INFO L470 AbstractCegarLoop]: Abstraction has 2101 states and 2934 transitions. [2022-01-31 17:10:58,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 2.0934579439252334) internal successors, (224), 106 states have internal predecessors, (224), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:10:58,597 INFO L276 IsEmpty]: Start isEmpty. Operand 2101 states and 2934 transitions. [2022-01-31 17:10:58,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2022-01-31 17:10:58,597 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:10:58,597 INFO L514 BasicCegarLoop]: trace histogram [104, 104, 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 17:10:58,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2022-01-31 17:10:58,597 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:10:58,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:10:58,598 INFO L85 PathProgramCache]: Analyzing trace with hash 241367534, now seen corresponding path program 103 times [2022-01-31 17:10:58,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:10:58,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1690846338] [2022-01-31 17:10:58,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:10:58,599 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:10:58,599 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:10:58,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:10:58,604 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:10:58,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:11:01,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:11:01,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:11:01,872 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 17:11:01,872 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:11:01,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1690846338] [2022-01-31 17:11:01,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1690846338] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:11:01,873 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:11:01,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2022-01-31 17:11:01,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427376790] [2022-01-31 17:11:01,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:11:01,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-01-31 17:11:01,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:11:01,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-01-31 17:11:01,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5673, Invalid=5883, Unknown=0, NotChecked=0, Total=11556 [2022-01-31 17:11:01,876 INFO L87 Difference]: Start difference. First operand 2101 states and 2934 transitions. Second operand has 108 states, 108 states have (on average 2.0925925925925926) internal successors, (226), 107 states have internal predecessors, (226), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:11:13,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:11:13,609 INFO L93 Difference]: Finished difference Result 4025 states and 5708 transitions. [2022-01-31 17:11:13,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-01-31 17:11:13,609 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 2.0925925925925926) internal successors, (226), 107 states have internal predecessors, (226), 2 states have call successors, (3), 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 233 [2022-01-31 17:11:13,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:11:13,612 INFO L225 Difference]: With dead ends: 4025 [2022-01-31 17:11:13,612 INFO L226 Difference]: Without dead ends: 2139 [2022-01-31 17:11:13,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5564 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=17013, Invalid=28143, Unknown=0, NotChecked=0, Total=45156 [2022-01-31 17:11:13,616 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 10048 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 3941 mSolverCounterSat, 1932 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10051 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 5873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1932 IncrementalHoareTripleChecker+Valid, 3941 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:11:13,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10051 Valid, 63 Invalid, 5873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1932 Valid, 3941 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-01-31 17:11:13,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2139 states. [2022-01-31 17:11:14,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2139 to 2121. [2022-01-31 17:11:14,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2121 states, 1906 states have (on average 1.3321091290661071) internal successors, (2539), 1906 states have internal predecessors, (2539), 212 states have call successors, (212), 3 states have call predecessors, (212), 2 states have return successors, (211), 211 states have call predecessors, (211), 211 states have call successors, (211) [2022-01-31 17:11:14,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2121 states to 2121 states and 2962 transitions. [2022-01-31 17:11:14,791 INFO L78 Accepts]: Start accepts. Automaton has 2121 states and 2962 transitions. Word has length 233 [2022-01-31 17:11:14,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:11:14,791 INFO L470 AbstractCegarLoop]: Abstraction has 2121 states and 2962 transitions. [2022-01-31 17:11:14,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 2.0925925925925926) internal successors, (226), 107 states have internal predecessors, (226), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:11:14,792 INFO L276 IsEmpty]: Start isEmpty. Operand 2121 states and 2962 transitions. [2022-01-31 17:11:14,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-01-31 17:11:14,792 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:11:14,792 INFO L514 BasicCegarLoop]: trace histogram [105, 105, 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 17:11:14,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2022-01-31 17:11:14,792 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:11:14,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:11:14,793 INFO L85 PathProgramCache]: Analyzing trace with hash -722843828, now seen corresponding path program 104 times [2022-01-31 17:11:14,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:11:14,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [46470704] [2022-01-31 17:11:14,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:11:14,794 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:11:14,794 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:11:14,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:11:14,799 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:11:14,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:11:17,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:11:17,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:11:17,912 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 17:11:17,912 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:11:17,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [46470704] [2022-01-31 17:11:17,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [46470704] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:11:17,912 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:11:17,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [109] imperfect sequences [] total 109 [2022-01-31 17:11:17,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879610411] [2022-01-31 17:11:17,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:11:17,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-01-31 17:11:17,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:11:17,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-01-31 17:11:17,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5780, Invalid=5992, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 17:11:17,915 INFO L87 Difference]: Start difference. First operand 2121 states and 2962 transitions. Second operand has 109 states, 109 states have (on average 2.091743119266055) internal successors, (228), 108 states have internal predecessors, (228), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:11:30,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:11:30,990 INFO L93 Difference]: Finished difference Result 4063 states and 5762 transitions. [2022-01-31 17:11:30,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-01-31 17:11:30,991 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 2.091743119266055) internal successors, (228), 108 states have internal predecessors, (228), 2 states have call successors, (3), 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 17:11:30,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:11:30,994 INFO L225 Difference]: With dead ends: 4063 [2022-01-31 17:11:30,994 INFO L226 Difference]: Without dead ends: 2159 [2022-01-31 17:11:30,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5670 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=17334, Invalid=28676, Unknown=0, NotChecked=0, Total=46010 [2022-01-31 17:11:30,997 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 10375 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 3979 mSolverCounterSat, 1995 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10378 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 5974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1995 IncrementalHoareTripleChecker+Valid, 3979 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:11:30,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10378 Valid, 73 Invalid, 5974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1995 Valid, 3979 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-01-31 17:11:30,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2159 states. [2022-01-31 17:11:32,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2159 to 2141. [2022-01-31 17:11:32,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2141 states, 1924 states have (on average 1.3321205821205822) internal successors, (2563), 1924 states have internal predecessors, (2563), 214 states have call successors, (214), 3 states have call predecessors, (214), 2 states have return successors, (213), 213 states have call predecessors, (213), 213 states have call successors, (213) [2022-01-31 17:11:32,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2141 states to 2141 states and 2990 transitions. [2022-01-31 17:11:32,194 INFO L78 Accepts]: Start accepts. Automaton has 2141 states and 2990 transitions. Word has length 235 [2022-01-31 17:11:32,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:11:32,194 INFO L470 AbstractCegarLoop]: Abstraction has 2141 states and 2990 transitions. [2022-01-31 17:11:32,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 2.091743119266055) internal successors, (228), 108 states have internal predecessors, (228), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:11:32,195 INFO L276 IsEmpty]: Start isEmpty. Operand 2141 states and 2990 transitions. [2022-01-31 17:11:32,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2022-01-31 17:11:32,195 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:11:32,195 INFO L514 BasicCegarLoop]: trace histogram [106, 106, 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 17:11:32,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2022-01-31 17:11:32,195 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:11:32,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:11:32,196 INFO L85 PathProgramCache]: Analyzing trace with hash 382973226, now seen corresponding path program 105 times [2022-01-31 17:11:32,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:11:32,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [643195371] [2022-01-31 17:11:32,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:11:32,197 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:11:32,197 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:11:32,197 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:11:32,202 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:11:32,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:11:35,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:11:35,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:11:35,513 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 17:11:35,514 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:11:35,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [643195371] [2022-01-31 17:11:35,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [643195371] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:11:35,514 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:11:35,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [110] imperfect sequences [] total 110 [2022-01-31 17:11:35,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236109615] [2022-01-31 17:11:35,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:11:35,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-01-31 17:11:35,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:11:35,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-01-31 17:11:35,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5888, Invalid=6102, Unknown=0, NotChecked=0, Total=11990 [2022-01-31 17:11:35,516 INFO L87 Difference]: Start difference. First operand 2141 states and 2990 transitions. Second operand has 110 states, 110 states have (on average 2.090909090909091) internal successors, (230), 109 states have internal predecessors, (230), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:11:48,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:11:48,716 INFO L93 Difference]: Finished difference Result 4101 states and 5816 transitions. [2022-01-31 17:11:48,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-01-31 17:11:48,717 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.090909090909091) internal successors, (230), 109 states have internal predecessors, (230), 2 states have call successors, (3), 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 237 [2022-01-31 17:11:48,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:11:48,720 INFO L225 Difference]: With dead ends: 4101 [2022-01-31 17:11:48,720 INFO L226 Difference]: Without dead ends: 2179 [2022-01-31 17:11:48,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5777 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=17658, Invalid=29214, Unknown=0, NotChecked=0, Total=46872 [2022-01-31 17:11:48,724 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 9347 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 4187 mSolverCounterSat, 1808 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9350 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 5995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1808 IncrementalHoareTripleChecker+Valid, 4187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:11:48,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9350 Valid, 82 Invalid, 5995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1808 Valid, 4187 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-01-31 17:11:48,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2179 states. [2022-01-31 17:11:49,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2179 to 2161. [2022-01-31 17:11:49,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2161 states, 1942 states have (on average 1.332131822863028) internal successors, (2587), 1942 states have internal predecessors, (2587), 216 states have call successors, (216), 3 states have call predecessors, (216), 2 states have return successors, (215), 215 states have call predecessors, (215), 215 states have call successors, (215) [2022-01-31 17:11:49,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2161 states to 2161 states and 3018 transitions. [2022-01-31 17:11:49,933 INFO L78 Accepts]: Start accepts. Automaton has 2161 states and 3018 transitions. Word has length 237 [2022-01-31 17:11:49,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:11:49,933 INFO L470 AbstractCegarLoop]: Abstraction has 2161 states and 3018 transitions. [2022-01-31 17:11:49,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 2.090909090909091) internal successors, (230), 109 states have internal predecessors, (230), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:11:49,934 INFO L276 IsEmpty]: Start isEmpty. Operand 2161 states and 3018 transitions. [2022-01-31 17:11:49,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-01-31 17:11:49,934 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:11:49,934 INFO L514 BasicCegarLoop]: trace histogram [107, 107, 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 17:11:49,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2022-01-31 17:11:49,934 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:11:49,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:11:49,935 INFO L85 PathProgramCache]: Analyzing trace with hash -2078727288, now seen corresponding path program 106 times [2022-01-31 17:11:49,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:11:49,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [4259110] [2022-01-31 17:11:49,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:11:49,936 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:11:49,936 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:11:49,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:11:49,941 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:11:49,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:11:53,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:11:53,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:11:53,512 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 17:11:53,512 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:11:53,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [4259110] [2022-01-31 17:11:53,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [4259110] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:11:53,512 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:11:53,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [111] imperfect sequences [] total 111 [2022-01-31 17:11:53,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695297012] [2022-01-31 17:11:53,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:11:53,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-01-31 17:11:53,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:11:53,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-01-31 17:11:53,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5997, Invalid=6213, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 17:11:53,516 INFO L87 Difference]: Start difference. First operand 2161 states and 3018 transitions. Second operand has 111 states, 111 states have (on average 2.09009009009009) internal successors, (232), 110 states have internal predecessors, (232), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:12:07,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:12:07,294 INFO L93 Difference]: Finished difference Result 4139 states and 5870 transitions. [2022-01-31 17:12:07,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-01-31 17:12:07,295 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 2.09009009009009) internal successors, (232), 110 states have internal predecessors, (232), 2 states have call successors, (3), 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 17:12:07,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:12:07,298 INFO L225 Difference]: With dead ends: 4139 [2022-01-31 17:12:07,298 INFO L226 Difference]: Without dead ends: 2199 [2022-01-31 17:12:07,301 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 17:12:07,301 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 10152 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 4291 mSolverCounterSat, 1953 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10155 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 6244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1953 IncrementalHoareTripleChecker+Valid, 4291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:12:07,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10155 Valid, 87 Invalid, 6244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1953 Valid, 4291 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-01-31 17:12:07,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2022-01-31 17:12:08,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 2181. [2022-01-31 17:12:08,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2181 states, 1960 states have (on average 1.332142857142857) internal successors, (2611), 1960 states have internal predecessors, (2611), 218 states have call successors, (218), 3 states have call predecessors, (218), 2 states have return successors, (217), 217 states have call predecessors, (217), 217 states have call successors, (217) [2022-01-31 17:12:08,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2181 states to 2181 states and 3046 transitions. [2022-01-31 17:12:08,513 INFO L78 Accepts]: Start accepts. Automaton has 2181 states and 3046 transitions. Word has length 239 [2022-01-31 17:12:08,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:12:08,513 INFO L470 AbstractCegarLoop]: Abstraction has 2181 states and 3046 transitions. [2022-01-31 17:12:08,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 2.09009009009009) internal successors, (232), 110 states have internal predecessors, (232), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:12:08,514 INFO L276 IsEmpty]: Start isEmpty. Operand 2181 states and 3046 transitions. [2022-01-31 17:12:08,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2022-01-31 17:12:08,514 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:12:08,514 INFO L514 BasicCegarLoop]: trace histogram [108, 108, 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 17:12:08,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2022-01-31 17:12:08,514 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:12:08,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:12:08,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1245941146, now seen corresponding path program 107 times [2022-01-31 17:12:08,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:12:08,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [560669605] [2022-01-31 17:12:08,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:12:08,516 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:12:08,516 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:12:08,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:12:08,522 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:12:08,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:11,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:12:11,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:11,508 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 17:12:11,508 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:12:11,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [560669605] [2022-01-31 17:12:11,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [560669605] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:12:11,508 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:12:11,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [112] imperfect sequences [] total 112 [2022-01-31 17:12:11,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727222865] [2022-01-31 17:12:11,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:12:11,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-01-31 17:12:11,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:12:11,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-01-31 17:12:11,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6107, Invalid=6325, Unknown=0, NotChecked=0, Total=12432 [2022-01-31 17:12:11,511 INFO L87 Difference]: Start difference. First operand 2181 states and 3046 transitions. Second operand has 112 states, 112 states have (on average 2.0892857142857144) internal successors, (234), 111 states have internal predecessors, (234), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:12:24,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:12:24,806 INFO L93 Difference]: Finished difference Result 4177 states and 5924 transitions. [2022-01-31 17:12:24,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-01-31 17:12:24,806 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 2.0892857142857144) internal successors, (234), 111 states have internal predecessors, (234), 2 states have call successors, (3), 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 241 [2022-01-31 17:12:24,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:12:24,809 INFO L225 Difference]: With dead ends: 4177 [2022-01-31 17:12:24,809 INFO L226 Difference]: Without dead ends: 2219 [2022-01-31 17:12:24,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5994 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=18315, Invalid=30305, Unknown=0, NotChecked=0, Total=48620 [2022-01-31 17:12:24,813 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 9628 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 4289 mSolverCounterSat, 1861 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9631 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 6150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1861 IncrementalHoareTripleChecker+Valid, 4289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:12:24,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9631 Valid, 82 Invalid, 6150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1861 Valid, 4289 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-01-31 17:12:24,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2219 states. [2022-01-31 17:12:26,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2219 to 2201. [2022-01-31 17:12:26,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2201 states, 1978 states have (on average 1.332153690596562) internal successors, (2635), 1978 states have internal predecessors, (2635), 220 states have call successors, (220), 3 states have call predecessors, (220), 2 states have return successors, (219), 219 states have call predecessors, (219), 219 states have call successors, (219) [2022-01-31 17:12:26,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2201 states to 2201 states and 3074 transitions. [2022-01-31 17:12:26,075 INFO L78 Accepts]: Start accepts. Automaton has 2201 states and 3074 transitions. Word has length 241 [2022-01-31 17:12:26,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:12:26,075 INFO L470 AbstractCegarLoop]: Abstraction has 2201 states and 3074 transitions. [2022-01-31 17:12:26,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 2.0892857142857144) internal successors, (234), 111 states have internal predecessors, (234), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:12:26,075 INFO L276 IsEmpty]: Start isEmpty. Operand 2201 states and 3074 transitions. [2022-01-31 17:12:26,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-01-31 17:12:26,076 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:12:26,076 INFO L514 BasicCegarLoop]: trace histogram [109, 109, 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 17:12:26,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2022-01-31 17:12:26,076 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:12:26,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:12:26,076 INFO L85 PathProgramCache]: Analyzing trace with hash 197624260, now seen corresponding path program 108 times [2022-01-31 17:12:26,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:12:26,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [171622035] [2022-01-31 17:12:26,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:12:26,077 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:12:26,077 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:12:26,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:12:26,084 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:12:26,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:29,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:12:29,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:29,342 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 17:12:29,342 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:12:29,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [171622035] [2022-01-31 17:12:29,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [171622035] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:12:29,342 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:12:29,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [113] imperfect sequences [] total 113 [2022-01-31 17:12:29,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309495845] [2022-01-31 17:12:29,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:12:29,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-01-31 17:12:29,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:12:29,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-01-31 17:12:29,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6218, Invalid=6438, Unknown=0, NotChecked=0, Total=12656 [2022-01-31 17:12:29,345 INFO L87 Difference]: Start difference. First operand 2201 states and 3074 transitions. Second operand has 113 states, 113 states have (on average 2.088495575221239) internal successors, (236), 112 states have internal predecessors, (236), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:12:42,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:12:42,897 INFO L93 Difference]: Finished difference Result 4215 states and 5978 transitions. [2022-01-31 17:12:42,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-01-31 17:12:42,897 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 2.088495575221239) internal successors, (236), 112 states have internal predecessors, (236), 2 states have call successors, (3), 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 17:12:42,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:12:42,900 INFO L225 Difference]: With dead ends: 4215 [2022-01-31 17:12:42,900 INFO L226 Difference]: Without dead ends: 2239 [2022-01-31 17:12:42,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6104 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=18648, Invalid=30858, Unknown=0, NotChecked=0, Total=49506 [2022-01-31 17:12:42,905 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 10673 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 4009 mSolverCounterSat, 2046 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10676 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 6055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2046 IncrementalHoareTripleChecker+Valid, 4009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:12:42,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10676 Valid, 73 Invalid, 6055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2046 Valid, 4009 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-01-31 17:12:42,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2239 states. [2022-01-31 17:12:44,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2239 to 2221. [2022-01-31 17:12:44,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2221 states, 1996 states have (on average 1.3321643286573146) internal successors, (2659), 1996 states have internal predecessors, (2659), 222 states have call successors, (222), 3 states have call predecessors, (222), 2 states have return successors, (221), 221 states have call predecessors, (221), 221 states have call successors, (221) [2022-01-31 17:12:44,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2221 states to 2221 states and 3102 transitions. [2022-01-31 17:12:44,165 INFO L78 Accepts]: Start accepts. Automaton has 2221 states and 3102 transitions. Word has length 243 [2022-01-31 17:12:44,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:12:44,165 INFO L470 AbstractCegarLoop]: Abstraction has 2221 states and 3102 transitions. [2022-01-31 17:12:44,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 2.088495575221239) internal successors, (236), 112 states have internal predecessors, (236), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:12:44,165 INFO L276 IsEmpty]: Start isEmpty. Operand 2221 states and 3102 transitions. [2022-01-31 17:12:44,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2022-01-31 17:12:44,166 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:12:44,166 INFO L514 BasicCegarLoop]: trace histogram [110, 110, 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 17:12:44,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2022-01-31 17:12:44,166 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:12:44,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:12:44,167 INFO L85 PathProgramCache]: Analyzing trace with hash 189542818, now seen corresponding path program 109 times [2022-01-31 17:12:44,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:12:44,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [173534564] [2022-01-31 17:12:44,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:12:44,168 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:12:44,168 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:12:44,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:12:44,174 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:12:44,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:47,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:12:47,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:47,366 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 17:12:47,366 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:12:47,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [173534564] [2022-01-31 17:12:47,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [173534564] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:12:47,366 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:12:47,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [114] imperfect sequences [] total 114 [2022-01-31 17:12:47,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690966655] [2022-01-31 17:12:47,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:12:47,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2022-01-31 17:12:47,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:12:47,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2022-01-31 17:12:47,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6330, Invalid=6552, Unknown=0, NotChecked=0, Total=12882 [2022-01-31 17:12:47,369 INFO L87 Difference]: Start difference. First operand 2221 states and 3102 transitions. Second operand has 114 states, 114 states have (on average 2.087719298245614) internal successors, (238), 113 states have internal predecessors, (238), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:13:00,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:13:00,918 INFO L93 Difference]: Finished difference Result 4253 states and 6032 transitions. [2022-01-31 17:13:00,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-01-31 17:13:00,918 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 2.087719298245614) internal successors, (238), 113 states have internal predecessors, (238), 2 states have call successors, (3), 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 245 [2022-01-31 17:13:00,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:13:00,922 INFO L225 Difference]: With dead ends: 4253 [2022-01-31 17:13:00,922 INFO L226 Difference]: Without dead ends: 2259 [2022-01-31 17:13:00,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6215 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=18984, Invalid=31416, Unknown=0, NotChecked=0, Total=50400 [2022-01-31 17:13:00,928 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 11187 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 4011 mSolverCounterSat, 2138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11190 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 6149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2138 IncrementalHoareTripleChecker+Valid, 4011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:13:00,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11190 Valid, 57 Invalid, 6149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2138 Valid, 4011 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-01-31 17:13:00,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2259 states. [2022-01-31 17:13:02,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2259 to 2241. [2022-01-31 17:13:02,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2241 states, 2014 states have (on average 1.3321747765640517) internal successors, (2683), 2014 states have internal predecessors, (2683), 224 states have call successors, (224), 3 states have call predecessors, (224), 2 states have return successors, (223), 223 states have call predecessors, (223), 223 states have call successors, (223) [2022-01-31 17:13:02,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2241 states to 2241 states and 3130 transitions. [2022-01-31 17:13:02,243 INFO L78 Accepts]: Start accepts. Automaton has 2241 states and 3130 transitions. Word has length 245 [2022-01-31 17:13:02,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:13:02,243 INFO L470 AbstractCegarLoop]: Abstraction has 2241 states and 3130 transitions. [2022-01-31 17:13:02,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 2.087719298245614) internal successors, (238), 113 states have internal predecessors, (238), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:13:02,243 INFO L276 IsEmpty]: Start isEmpty. Operand 2241 states and 3130 transitions. [2022-01-31 17:13:02,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2022-01-31 17:13:02,250 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:13:02,250 INFO L514 BasicCegarLoop]: trace histogram [111, 111, 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 17:13:02,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2022-01-31 17:13:02,250 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:13:02,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:13:02,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1013211648, now seen corresponding path program 110 times [2022-01-31 17:13:02,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:13:02,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [122695689] [2022-01-31 17:13:02,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:13:02,251 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:13:02,251 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:13:02,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:13:02,258 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:13:02,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:05,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:13:05,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:05,840 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 17:13:05,840 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:13:05,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [122695689] [2022-01-31 17:13:05,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [122695689] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:13:05,840 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:13:05,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [115] imperfect sequences [] total 115 [2022-01-31 17:13:05,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111357483] [2022-01-31 17:13:05,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:13:05,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-01-31 17:13:05,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:13:05,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-01-31 17:13:05,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6443, Invalid=6667, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 17:13:05,844 INFO L87 Difference]: Start difference. First operand 2241 states and 3130 transitions. Second operand has 115 states, 115 states have (on average 2.0869565217391304) internal successors, (240), 114 states have internal predecessors, (240), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:13:20,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:13:20,688 INFO L93 Difference]: Finished difference Result 4291 states and 6086 transitions. [2022-01-31 17:13:20,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-01-31 17:13:20,688 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 2.0869565217391304) internal successors, (240), 114 states have internal predecessors, (240), 2 states have call successors, (3), 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 17:13:20,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:13:20,692 INFO L225 Difference]: With dead ends: 4291 [2022-01-31 17:13:20,692 INFO L226 Difference]: Without dead ends: 2279 [2022-01-31 17:13:20,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6327 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=19323, Invalid=31979, Unknown=0, NotChecked=0, Total=51302 [2022-01-31 17:13:20,700 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 10447 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 4391 mSolverCounterSat, 2010 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10450 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 6401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2010 IncrementalHoareTripleChecker+Valid, 4391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:13:20,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10450 Valid, 73 Invalid, 6401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2010 Valid, 4391 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-01-31 17:13:20,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2279 states. [2022-01-31 17:13:21,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2279 to 2261. [2022-01-31 17:13:21,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2261 states, 2032 states have (on average 1.3321850393700787) internal successors, (2707), 2032 states have internal predecessors, (2707), 226 states have call successors, (226), 3 states have call predecessors, (226), 2 states have return successors, (225), 225 states have call predecessors, (225), 225 states have call successors, (225) [2022-01-31 17:13:22,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2261 states to 2261 states and 3158 transitions. [2022-01-31 17:13:22,001 INFO L78 Accepts]: Start accepts. Automaton has 2261 states and 3158 transitions. Word has length 247 [2022-01-31 17:13:22,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:13:22,002 INFO L470 AbstractCegarLoop]: Abstraction has 2261 states and 3158 transitions. [2022-01-31 17:13:22,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 2.0869565217391304) internal successors, (240), 114 states have internal predecessors, (240), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:13:22,002 INFO L276 IsEmpty]: Start isEmpty. Operand 2261 states and 3158 transitions. [2022-01-31 17:13:22,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2022-01-31 17:13:22,003 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:13:22,003 INFO L514 BasicCegarLoop]: trace histogram [112, 112, 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 17:13:22,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2022-01-31 17:13:22,003 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:13:22,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:13:22,003 INFO L85 PathProgramCache]: Analyzing trace with hash -2009992482, now seen corresponding path program 111 times [2022-01-31 17:13:22,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:13:22,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1926665179] [2022-01-31 17:13:22,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:13:22,004 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:13:22,004 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:13:22,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:13:22,011 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:13:22,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:25,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:13:25,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:25,066 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 17:13:25,066 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:13:25,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1926665179] [2022-01-31 17:13:25,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1926665179] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:13:25,066 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:13:25,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [116] imperfect sequences [] total 116 [2022-01-31 17:13:25,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989508407] [2022-01-31 17:13:25,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:13:25,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-01-31 17:13:25,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:13:25,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-01-31 17:13:25,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6557, Invalid=6783, Unknown=0, NotChecked=0, Total=13340 [2022-01-31 17:13:25,071 INFO L87 Difference]: Start difference. First operand 2261 states and 3158 transitions. Second operand has 116 states, 116 states have (on average 2.086206896551724) internal successors, (242), 115 states have internal predecessors, (242), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:13:39,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:13:39,351 INFO L93 Difference]: Finished difference Result 4329 states and 6140 transitions. [2022-01-31 17:13:39,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-01-31 17:13:39,351 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 2.086206896551724) internal successors, (242), 115 states have internal predecessors, (242), 2 states have call successors, (3), 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 249 [2022-01-31 17:13:39,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:13:39,354 INFO L225 Difference]: With dead ends: 4329 [2022-01-31 17:13:39,355 INFO L226 Difference]: Without dead ends: 2299 [2022-01-31 17:13:39,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6440 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=19665, Invalid=32547, Unknown=0, NotChecked=0, Total=52212 [2022-01-31 17:13:39,361 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 10768 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 4351 mSolverCounterSat, 2063 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10771 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 6414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2063 IncrementalHoareTripleChecker+Valid, 4351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:13:39,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10771 Valid, 83 Invalid, 6414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2063 Valid, 4351 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-01-31 17:13:39,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2299 states. [2022-01-31 17:13:40,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2299 to 2281. [2022-01-31 17:13:40,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2281 states, 2050 states have (on average 1.3321951219512196) internal successors, (2731), 2050 states have internal predecessors, (2731), 228 states have call successors, (228), 3 states have call predecessors, (228), 2 states have return successors, (227), 227 states have call predecessors, (227), 227 states have call successors, (227) [2022-01-31 17:13:40,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2281 states to 2281 states and 3186 transitions. [2022-01-31 17:13:40,688 INFO L78 Accepts]: Start accepts. Automaton has 2281 states and 3186 transitions. Word has length 249 [2022-01-31 17:13:40,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:13:40,689 INFO L470 AbstractCegarLoop]: Abstraction has 2281 states and 3186 transitions. [2022-01-31 17:13:40,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 2.086206896551724) internal successors, (242), 115 states have internal predecessors, (242), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:13:40,689 INFO L276 IsEmpty]: Start isEmpty. Operand 2281 states and 3186 transitions. [2022-01-31 17:13:40,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2022-01-31 17:13:40,689 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:13:40,690 INFO L514 BasicCegarLoop]: trace histogram [113, 113, 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 17:13:40,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2022-01-31 17:13:40,690 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:13:40,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:13:40,690 INFO L85 PathProgramCache]: Analyzing trace with hash 383697980, now seen corresponding path program 112 times [2022-01-31 17:13:40,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:13:40,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [360463397] [2022-01-31 17:13:40,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:13:40,691 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:13:40,691 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:13:40,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:13:40,697 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:13:40,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:43,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:13:43,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:43,915 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 17:13:43,915 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:13:43,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [360463397] [2022-01-31 17:13:43,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [360463397] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:13:43,916 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:13:43,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [117] imperfect sequences [] total 117 [2022-01-31 17:13:43,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960193088] [2022-01-31 17:13:43,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:13:43,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-01-31 17:13:43,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:13:43,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-01-31 17:13:43,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6672, Invalid=6900, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 17:13:43,918 INFO L87 Difference]: Start difference. First operand 2281 states and 3186 transitions. Second operand has 117 states, 117 states have (on average 2.0854700854700856) internal successors, (244), 116 states have internal predecessors, (244), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:13:58,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:13:58,732 INFO L93 Difference]: Finished difference Result 4367 states and 6194 transitions. [2022-01-31 17:13:58,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-01-31 17:13:58,733 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 2.0854700854700856) internal successors, (244), 116 states have internal predecessors, (244), 2 states have call successors, (3), 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 17:13:58,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:13:58,736 INFO L225 Difference]: With dead ends: 4367 [2022-01-31 17:13:58,736 INFO L226 Difference]: Without dead ends: 2319 [2022-01-31 17:13:58,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6554 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=20010, Invalid=33120, Unknown=0, NotChecked=0, Total=53130 [2022-01-31 17:13:58,739 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 12516 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 4187 mSolverCounterSat, 2372 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12519 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 6559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2372 IncrementalHoareTripleChecker+Valid, 4187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:13:58,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12519 Valid, 57 Invalid, 6559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2372 Valid, 4187 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-01-31 17:13:58,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2319 states. [2022-01-31 17:14:00,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2319 to 2301. [2022-01-31 17:14:00,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2301 states, 2068 states have (on average 1.3322050290135397) internal successors, (2755), 2068 states have internal predecessors, (2755), 230 states have call successors, (230), 3 states have call predecessors, (230), 2 states have return successors, (229), 229 states have call predecessors, (229), 229 states have call successors, (229) [2022-01-31 17:14:00,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2301 states to 2301 states and 3214 transitions. [2022-01-31 17:14:00,140 INFO L78 Accepts]: Start accepts. Automaton has 2301 states and 3214 transitions. Word has length 251 [2022-01-31 17:14:00,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:14:00,140 INFO L470 AbstractCegarLoop]: Abstraction has 2301 states and 3214 transitions. [2022-01-31 17:14:00,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 2.0854700854700856) internal successors, (244), 116 states have internal predecessors, (244), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:14:00,140 INFO L276 IsEmpty]: Start isEmpty. Operand 2301 states and 3214 transitions. [2022-01-31 17:14:00,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2022-01-31 17:14:00,141 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:14:00,141 INFO L514 BasicCegarLoop]: trace histogram [114, 114, 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 17:14:00,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2022-01-31 17:14:00,141 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:14:00,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:14:00,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1382238694, now seen corresponding path program 113 times [2022-01-31 17:14:00,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:14:00,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [115713075] [2022-01-31 17:14:00,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:14:00,143 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:14:00,143 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:14:00,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:14:00,149 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:14:00,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:14:03,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:14:03,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:14:03,090 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 17:14:03,090 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:14:03,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [115713075] [2022-01-31 17:14:03,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [115713075] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:14:03,090 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:14:03,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [118] imperfect sequences [] total 118 [2022-01-31 17:14:03,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477109844] [2022-01-31 17:14:03,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:14:03,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2022-01-31 17:14:03,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:14:03,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2022-01-31 17:14:03,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6788, Invalid=7018, Unknown=0, NotChecked=0, Total=13806 [2022-01-31 17:14:03,093 INFO L87 Difference]: Start difference. First operand 2301 states and 3214 transitions. Second operand has 118 states, 118 states have (on average 2.0847457627118646) internal successors, (246), 117 states have internal predecessors, (246), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:14:18,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:14:18,559 INFO L93 Difference]: Finished difference Result 4405 states and 6248 transitions. [2022-01-31 17:14:18,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-01-31 17:14:18,559 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 2.0847457627118646) internal successors, (246), 117 states have internal predecessors, (246), 2 states have call successors, (3), 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 253 [2022-01-31 17:14:18,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:14:18,562 INFO L225 Difference]: With dead ends: 4405 [2022-01-31 17:14:18,562 INFO L226 Difference]: Without dead ends: 2339 [2022-01-31 17:14:18,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6669 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=20358, Invalid=33698, Unknown=0, NotChecked=0, Total=54056 [2022-01-31 17:14:18,566 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 10597 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 4527 mSolverCounterSat, 2042 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10600 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 6569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2042 IncrementalHoareTripleChecker+Valid, 4527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:14:18,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10600 Valid, 90 Invalid, 6569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2042 Valid, 4527 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-01-31 17:14:18,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2339 states. [2022-01-31 17:14:20,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2339 to 2321. [2022-01-31 17:14:20,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2321 states, 2086 states have (on average 1.332214765100671) internal successors, (2779), 2086 states have internal predecessors, (2779), 232 states have call successors, (232), 3 states have call predecessors, (232), 2 states have return successors, (231), 231 states have call predecessors, (231), 231 states have call successors, (231) [2022-01-31 17:14:20,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2321 states to 2321 states and 3242 transitions. [2022-01-31 17:14:20,005 INFO L78 Accepts]: Start accepts. Automaton has 2321 states and 3242 transitions. Word has length 253 [2022-01-31 17:14:20,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:14:20,005 INFO L470 AbstractCegarLoop]: Abstraction has 2321 states and 3242 transitions. [2022-01-31 17:14:20,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 2.0847457627118646) internal successors, (246), 117 states have internal predecessors, (246), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:14:20,005 INFO L276 IsEmpty]: Start isEmpty. Operand 2321 states and 3242 transitions. [2022-01-31 17:14:20,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2022-01-31 17:14:20,020 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:14:20,020 INFO L514 BasicCegarLoop]: trace histogram [115, 115, 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 17:14:20,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2022-01-31 17:14:20,020 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:14:20,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:14:20,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1935300488, now seen corresponding path program 114 times [2022-01-31 17:14:20,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:14:20,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2127939349] [2022-01-31 17:14:20,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:14:20,021 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:14:20,021 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:14:20,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:14:20,028 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:14:20,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:14:22,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:14:22,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:14:22,777 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 17:14:22,777 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:14:22,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2127939349] [2022-01-31 17:14:22,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2127939349] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:14:22,777 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:14:22,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [119] imperfect sequences [] total 119 [2022-01-31 17:14:22,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107471064] [2022-01-31 17:14:22,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:14:22,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-01-31 17:14:22,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:14:22,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-01-31 17:14:22,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6905, Invalid=7137, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 17:14:22,780 INFO L87 Difference]: Start difference. First operand 2321 states and 3242 transitions. Second operand has 119 states, 119 states have (on average 2.0840336134453783) internal successors, (248), 118 states have internal predecessors, (248), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:14:38,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:14:38,341 INFO L93 Difference]: Finished difference Result 4443 states and 6302 transitions. [2022-01-31 17:14:38,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-01-31 17:14:38,341 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 2.0840336134453783) internal successors, (248), 118 states have internal predecessors, (248), 2 states have call successors, (3), 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 17:14:38,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:14:38,345 INFO L225 Difference]: With dead ends: 4443 [2022-01-31 17:14:38,345 INFO L226 Difference]: Without dead ends: 2359 [2022-01-31 17:14:38,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6785 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=20709, Invalid=34281, Unknown=0, NotChecked=0, Total=54990 [2022-01-31 17:14:38,350 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 9961 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 4609 mSolverCounterSat, 1938 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9964 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 6547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1938 IncrementalHoareTripleChecker+Valid, 4609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:14:38,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9964 Valid, 68 Invalid, 6547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1938 Valid, 4609 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-01-31 17:14:38,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2359 states. [2022-01-31 17:14:39,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2359 to 2341. [2022-01-31 17:14:39,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2341 states, 2104 states have (on average 1.3322243346007605) internal successors, (2803), 2104 states have internal predecessors, (2803), 234 states have call successors, (234), 3 states have call predecessors, (234), 2 states have return successors, (233), 233 states have call predecessors, (233), 233 states have call successors, (233) [2022-01-31 17:14:39,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2341 states to 2341 states and 3270 transitions. [2022-01-31 17:14:39,748 INFO L78 Accepts]: Start accepts. Automaton has 2341 states and 3270 transitions. Word has length 255 [2022-01-31 17:14:39,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:14:39,748 INFO L470 AbstractCegarLoop]: Abstraction has 2341 states and 3270 transitions. [2022-01-31 17:14:39,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 2.0840336134453783) internal successors, (248), 118 states have internal predecessors, (248), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:14:39,748 INFO L276 IsEmpty]: Start isEmpty. Operand 2341 states and 3270 transitions. [2022-01-31 17:14:39,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2022-01-31 17:14:39,749 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:14:39,749 INFO L514 BasicCegarLoop]: trace histogram [116, 116, 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 17:14:39,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2022-01-31 17:14:39,749 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:14:39,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:14:39,749 INFO L85 PathProgramCache]: Analyzing trace with hash -851739818, now seen corresponding path program 115 times [2022-01-31 17:14:39,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:14:39,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2129965441] [2022-01-31 17:14:39,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:14:39,755 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:14:39,755 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:14:39,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:14:39,762 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:14:39,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:14:44,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:14:44,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:14:44,042 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 17:14:44,042 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:14:44,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2129965441] [2022-01-31 17:14:44,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2129965441] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:14:44,042 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:14:44,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [120] imperfect sequences [] total 120 [2022-01-31 17:14:44,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108379607] [2022-01-31 17:14:44,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:14:44,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2022-01-31 17:14:44,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:14:44,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2022-01-31 17:14:44,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7023, Invalid=7257, Unknown=0, NotChecked=0, Total=14280 [2022-01-31 17:14:44,046 INFO L87 Difference]: Start difference. First operand 2341 states and 3270 transitions. Second operand has 120 states, 120 states have (on average 2.0833333333333335) internal successors, (250), 119 states have internal predecessors, (250), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:01,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:01,549 INFO L93 Difference]: Finished difference Result 4481 states and 6356 transitions. [2022-01-31 17:15:01,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-01-31 17:15:01,549 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 2.0833333333333335) internal successors, (250), 119 states have internal predecessors, (250), 2 states have call successors, (3), 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 257 [2022-01-31 17:15:01,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:01,553 INFO L225 Difference]: With dead ends: 4481 [2022-01-31 17:15:01,553 INFO L226 Difference]: Without dead ends: 2379 [2022-01-31 17:15:01,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6902 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=21063, Invalid=34869, Unknown=0, NotChecked=0, Total=55932 [2022-01-31 17:15:01,557 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 11461 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 4469 mSolverCounterSat, 2193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11464 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 6662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2193 IncrementalHoareTripleChecker+Valid, 4469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:01,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11464 Valid, 78 Invalid, 6662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2193 Valid, 4469 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-01-31 17:15:01,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2379 states. [2022-01-31 17:15:02,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2379 to 2361. [2022-01-31 17:15:02,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2361 states, 2122 states have (on average 1.3322337417530632) internal successors, (2827), 2122 states have internal predecessors, (2827), 236 states have call successors, (236), 3 states have call predecessors, (236), 2 states have return successors, (235), 235 states have call predecessors, (235), 235 states have call successors, (235) [2022-01-31 17:15:02,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2361 states to 2361 states and 3298 transitions. [2022-01-31 17:15:02,985 INFO L78 Accepts]: Start accepts. Automaton has 2361 states and 3298 transitions. Word has length 257 [2022-01-31 17:15:02,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:02,985 INFO L470 AbstractCegarLoop]: Abstraction has 2361 states and 3298 transitions. [2022-01-31 17:15:02,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 120 states have (on average 2.0833333333333335) internal successors, (250), 119 states have internal predecessors, (250), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:02,985 INFO L276 IsEmpty]: Start isEmpty. Operand 2361 states and 3298 transitions. [2022-01-31 17:15:02,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2022-01-31 17:15:02,986 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:02,986 INFO L514 BasicCegarLoop]: trace histogram [117, 117, 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 17:15:02,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2022-01-31 17:15:02,986 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:02,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:02,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1067978420, now seen corresponding path program 116 times [2022-01-31 17:15:02,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:02,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1900216054] [2022-01-31 17:15:02,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:02,988 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:02,988 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:02,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:02,995 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:03,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:06,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:06,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:06,200 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 17:15:06,200 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:06,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1900216054] [2022-01-31 17:15:06,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1900216054] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:06,200 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:06,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [121] imperfect sequences [] total 121 [2022-01-31 17:15:06,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629332641] [2022-01-31 17:15:06,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:06,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2022-01-31 17:15:06,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:06,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2022-01-31 17:15:06,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7142, Invalid=7378, Unknown=0, NotChecked=0, Total=14520 [2022-01-31 17:15:06,204 INFO L87 Difference]: Start difference. First operand 2361 states and 3298 transitions. Second operand has 121 states, 121 states have (on average 2.0826446280991737) internal successors, (252), 120 states have internal predecessors, (252), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)