/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-lopstr16/break-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 19:56:49,269 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 19:56:49,270 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 19:56:49,317 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 19:56:49,333 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 19:56:49,334 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 19:56:49,336 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 19:56:49,348 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 19:56:49,349 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 19:56:49,355 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 19:56:49,357 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 19:56:49,358 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 19:56:49,363 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 19:56:49,367 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 19:56:49,368 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 19:56:49,369 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 19:56:49,371 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 19:56:49,377 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 19:56:49,377 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 19:56:49,378 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 19:56:49,384 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 19:56:49,397 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 19:56:49,397 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 19:56:49,399 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 19:56:49,399 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 19:56:49,399 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 19:56:49,399 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 19:56:49,399 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 19:56:49,399 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 19:56:49,399 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 19:56:49,400 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 19:56:49,400 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 19:56:49,401 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 19:56:49,401 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 19:56:49,401 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 19:56:49,401 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 19:56:49,401 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 19:56:49,401 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 19:56:49,401 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 19:56:49,402 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 19:56:49,402 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 19:56:49,402 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 19:56:49,402 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 19:56:49,402 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 19:56:49,402 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 19:56:49,640 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 19:56:49,671 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 19:56:49,673 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 19:56:49,674 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 19:56:49,674 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 19:56:49,675 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-lopstr16/break-1.i [2022-01-31 19:56:49,724 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8824c7c97/896c5961e8394c5796757f0b2075a733/FLAG68a82a104 [2022-01-31 19:56:50,107 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 19:56:50,108 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-lopstr16/break-1.i [2022-01-31 19:56:50,117 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8824c7c97/896c5961e8394c5796757f0b2075a733/FLAG68a82a104 [2022-01-31 19:56:50,503 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8824c7c97/896c5961e8394c5796757f0b2075a733 [2022-01-31 19:56:50,505 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 19:56:50,507 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 19:56:50,510 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 19:56:50,510 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 19:56:50,513 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 19:56:50,513 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 07:56:50" (1/1) ... [2022-01-31 19:56:50,517 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e3a8b9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:56:50, skipping insertion in model container [2022-01-31 19:56:50,517 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 07:56:50" (1/1) ... [2022-01-31 19:56:50,521 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 19:56:50,533 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 19:56:50,670 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-lopstr16/break-1.i[800,813] [2022-01-31 19:56:50,683 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 19:56:56,508 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 19:56:56,520 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-lopstr16/break-1.i[800,813] [2022-01-31 19:56:56,523 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 19:56:56,539 INFO L208 MainTranslator]: Completed translation [2022-01-31 19:56:56,539 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:56:56 WrapperNode [2022-01-31 19:56:56,539 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 19:56:56,540 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 19:56:56,540 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 19:56:56,540 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 19:56:56,551 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:56:56" (1/1) ... [2022-01-31 19:56:56,551 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:56:56" (1/1) ... [2022-01-31 19:56:56,558 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:56:56" (1/1) ... [2022-01-31 19:56:56,558 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:56:56" (1/1) ... [2022-01-31 19:56:56,563 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:56:56" (1/1) ... [2022-01-31 19:56:56,566 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:56:56" (1/1) ... [2022-01-31 19:56:56,567 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:56:56" (1/1) ... [2022-01-31 19:56:56,569 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 19:56:56,570 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 19:56:56,570 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 19:56:56,570 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 19:56:56,571 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:56:56" (1/1) ... [2022-01-31 19:56:56,581 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 19:56:56,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 19:56:56,606 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 19:56:56,620 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 19:56:56,647 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 19:56:56,647 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 19:56:56,647 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 19:56:56,647 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 19:56:56,647 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 19:56:56,647 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 19:56:56,647 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 19:56:56,647 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 19:56:56,647 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 19:56:56,648 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 19:56:56,648 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 19:56:56,648 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 19:56:56,648 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2022-01-31 19:56:56,648 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 19:56:56,649 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 19:56:56,650 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-31 19:56:56,650 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-01-31 19:56:56,650 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-01-31 19:56:56,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 19:56:56,650 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 19:56:56,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 19:56:56,650 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 19:56:56,650 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 19:56:56,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 19:56:56,775 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 19:56:56,776 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 19:56:56,931 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 19:56:56,935 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 19:56:56,936 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-31 19:56:56,937 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 07:56:56 BoogieIcfgContainer [2022-01-31 19:56:56,937 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 19:56:56,938 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 19:56:56,939 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 19:56:56,948 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 19:56:56,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 07:56:50" (1/3) ... [2022-01-31 19:56:56,948 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25969f93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 07:56:56, skipping insertion in model container [2022-01-31 19:56:56,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:56:56" (2/3) ... [2022-01-31 19:56:56,949 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25969f93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 07:56:56, skipping insertion in model container [2022-01-31 19:56:56,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 07:56:56" (3/3) ... [2022-01-31 19:56:56,952 INFO L111 eAbstractionObserver]: Analyzing ICFG break-1.i [2022-01-31 19:56:56,957 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 19:56:56,958 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 19:56:57,008 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 19:56:57,016 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 19:56:57,016 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 19:56:57,031 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 19 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 19:56:57,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-31 19:56:57,045 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:57,045 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:57,046 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:57,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:57,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1774353919, now seen corresponding path program 1 times [2022-01-31 19:56:57,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:57,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [882487515] [2022-01-31 19:56:57,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:57,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:57,112 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:57,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:57,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:57,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:57,257 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 19:56:57,258 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:57,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [882487515] [2022-01-31 19:56:57,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [882487515] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:57,261 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:57,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 19:56:57,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057242561] [2022-01-31 19:56:57,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:57,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 19:56:57,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:57,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 19:56:57,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 19:56:57,296 INFO L87 Difference]: Start difference. First operand has 26 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 19 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:56:57,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:57,379 INFO L93 Difference]: Finished difference Result 54 states and 72 transitions. [2022-01-31 19:56:57,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 19:56:57,381 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-01-31 19:56:57,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:57,387 INFO L225 Difference]: With dead ends: 54 [2022-01-31 19:56:57,388 INFO L226 Difference]: Without dead ends: 29 [2022-01-31 19:56:57,391 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 19:56:57,394 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 18 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:57,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 29 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:56:57,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-31 19:56:57,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 21. [2022-01-31 19:56:57,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:56:57,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2022-01-31 19:56:57,434 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 14 [2022-01-31 19:56:57,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:57,434 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2022-01-31 19:56:57,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:56:57,435 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2022-01-31 19:56:57,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-31 19:56:57,435 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:57,435 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:57,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 19:56:57,436 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:57,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:57,436 INFO L85 PathProgramCache]: Analyzing trace with hash -216690582, now seen corresponding path program 1 times [2022-01-31 19:56:57,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:57,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1491416070] [2022-01-31 19:56:57,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:57,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:57,439 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:57,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:57,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:57,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:57,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:56:57,530 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:57,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1491416070] [2022-01-31 19:56:57,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1491416070] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:57,531 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:57,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 19:56:57,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410084323] [2022-01-31 19:56:57,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:57,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 19:56:57,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:57,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 19:56:57,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 19:56:57,533 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:56:57,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:57,627 INFO L93 Difference]: Finished difference Result 52 states and 64 transitions. [2022-01-31 19:56:57,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 19:56:57,628 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-01-31 19:56:57,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:57,629 INFO L225 Difference]: With dead ends: 52 [2022-01-31 19:56:57,629 INFO L226 Difference]: Without dead ends: 40 [2022-01-31 19:56:57,629 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 19:56:57,630 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 28 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:57,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 26 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:56:57,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-01-31 19:56:57,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 22. [2022-01-31 19:56:57,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:56:57,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2022-01-31 19:56:57,638 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 14 [2022-01-31 19:56:57,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:57,638 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2022-01-31 19:56:57,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:56:57,639 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2022-01-31 19:56:57,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-31 19:56:57,639 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:57,639 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:57,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 19:56:57,641 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:57,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:57,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1421479250, now seen corresponding path program 1 times [2022-01-31 19:56:57,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:57,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1693135624] [2022-01-31 19:56:57,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:57,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:57,645 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:57,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:57,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:57,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:57,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:56:57,705 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:57,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1693135624] [2022-01-31 19:56:57,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1693135624] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:57,706 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:57,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 19:56:57,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477680072] [2022-01-31 19:56:57,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:57,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 19:56:57,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:57,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 19:56:57,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 19:56:57,708 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:56:57,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:57,768 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2022-01-31 19:56:57,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 19:56:57,769 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-01-31 19:56:57,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:57,770 INFO L225 Difference]: With dead ends: 42 [2022-01-31 19:56:57,770 INFO L226 Difference]: Without dead ends: 23 [2022-01-31 19:56:57,771 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 19:56:57,774 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 15 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:57,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 34 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 19:56:57,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-01-31 19:56:57,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2022-01-31 19:56:57,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:56:57,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2022-01-31 19:56:57,783 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 15 [2022-01-31 19:56:57,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:57,784 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2022-01-31 19:56:57,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:56:57,784 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2022-01-31 19:56:57,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-31 19:56:57,784 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:57,785 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:57,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 19:56:57,785 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:57,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:57,785 INFO L85 PathProgramCache]: Analyzing trace with hash -2014988331, now seen corresponding path program 1 times [2022-01-31 19:56:57,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:57,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [871171190] [2022-01-31 19:56:57,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:57,802 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:56:57,802 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:56:57,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:57,806 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:57,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:57,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:57,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:57,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:56:57,899 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:57,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [871171190] [2022-01-31 19:56:57,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [871171190] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:57,900 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:57,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 19:56:57,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966434601] [2022-01-31 19:56:57,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:57,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 19:56:57,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:57,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 19:56:57,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 19:56:57,901 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:56:57,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:57,986 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2022-01-31 19:56:57,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 19:56:57,987 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-01-31 19:56:57,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:57,988 INFO L225 Difference]: With dead ends: 49 [2022-01-31 19:56:57,988 INFO L226 Difference]: Without dead ends: 37 [2022-01-31 19:56:57,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-31 19:56:57,998 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 19 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:57,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 26 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:56:57,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-31 19:56:58,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 25. [2022-01-31 19:56:58,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:56:58,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2022-01-31 19:56:58,006 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 17 [2022-01-31 19:56:58,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:58,007 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2022-01-31 19:56:58,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:56:58,007 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2022-01-31 19:56:58,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-31 19:56:58,008 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:58,008 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:58,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 19:56:58,009 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:58,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:58,009 INFO L85 PathProgramCache]: Analyzing trace with hash 318821514, now seen corresponding path program 2 times [2022-01-31 19:56:58,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:58,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1218140230] [2022-01-31 19:56:58,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:58,017 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:56:58,018 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:56:58,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:58,020 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:58,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:58,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:58,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:58,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:56:58,113 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:58,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1218140230] [2022-01-31 19:56:58,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1218140230] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:58,113 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:58,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 19:56:58,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223585684] [2022-01-31 19:56:58,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:58,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 19:56:58,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:58,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 19:56:58,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 19:56:58,115 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 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 19:56:58,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:58,206 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2022-01-31 19:56:58,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 19:56:58,208 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 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 19:56:58,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:58,213 INFO L225 Difference]: With dead ends: 57 [2022-01-31 19:56:58,218 INFO L226 Difference]: Without dead ends: 45 [2022-01-31 19:56:58,220 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 19:56:58,220 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 24 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:58,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 33 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:56:58,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-01-31 19:56:58,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2022-01-31 19:56:58,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:56:58,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2022-01-31 19:56:58,226 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 20 [2022-01-31 19:56:58,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:58,226 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2022-01-31 19:56:58,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 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 19:56:58,227 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2022-01-31 19:56:58,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-31 19:56:58,227 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:58,227 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:58,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 19:56:58,227 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:58,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:58,228 INFO L85 PathProgramCache]: Analyzing trace with hash -82673739, now seen corresponding path program 3 times [2022-01-31 19:56:58,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:58,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [300355642] [2022-01-31 19:56:58,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:58,239 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:56:58,239 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:56:58,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:58,241 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:58,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:58,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:58,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:58,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:56:58,339 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:58,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [300355642] [2022-01-31 19:56:58,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [300355642] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:58,340 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:58,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 19:56:58,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275580637] [2022-01-31 19:56:58,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:58,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 19:56:58,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:58,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 19:56:58,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-31 19:56:58,341 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 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 19:56:58,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:58,446 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2022-01-31 19:56:58,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 19:56:58,447 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-01-31 19:56:58,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:58,449 INFO L225 Difference]: With dead ends: 65 [2022-01-31 19:56:58,449 INFO L226 Difference]: Without dead ends: 53 [2022-01-31 19:56:58,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-01-31 19:56:58,452 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 35 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:58,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 30 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:56:58,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-01-31 19:56:58,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 31. [2022-01-31 19:56:58,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 25 states have (on average 1.08) internal successors, (27), 25 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:56:58,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2022-01-31 19:56:58,466 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 23 [2022-01-31 19:56:58,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:58,466 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2022-01-31 19:56:58,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 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 19:56:58,466 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2022-01-31 19:56:58,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-31 19:56:58,467 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:58,467 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:58,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 19:56:58,468 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:58,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:58,468 INFO L85 PathProgramCache]: Analyzing trace with hash 456163498, now seen corresponding path program 4 times [2022-01-31 19:56:58,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:58,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2024598000] [2022-01-31 19:56:58,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:58,475 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:56:58,476 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:56:58,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:58,477 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:58,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:58,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:58,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:58,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:56:58,575 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:58,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2024598000] [2022-01-31 19:56:58,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2024598000] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:58,575 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:58,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 19:56:58,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069757535] [2022-01-31 19:56:58,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:58,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 19:56:58,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:58,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 19:56:58,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 19:56:58,578 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:56:58,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:58,688 INFO L93 Difference]: Finished difference Result 73 states and 80 transitions. [2022-01-31 19:56:58,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 19:56:58,689 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-01-31 19:56:58,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:58,691 INFO L225 Difference]: With dead ends: 73 [2022-01-31 19:56:58,691 INFO L226 Difference]: Without dead ends: 61 [2022-01-31 19:56:58,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-01-31 19:56:58,694 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 43 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:58,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 37 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:56:58,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-01-31 19:56:58,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 34. [2022-01-31 19:56:58,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:56:58,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2022-01-31 19:56:58,702 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 26 [2022-01-31 19:56:58,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:58,702 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2022-01-31 19:56:58,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:56:58,703 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2022-01-31 19:56:58,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-31 19:56:58,703 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:58,703 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:58,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 19:56:58,704 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:58,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:58,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1631461483, now seen corresponding path program 5 times [2022-01-31 19:56:58,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:58,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1608301776] [2022-01-31 19:56:58,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:58,708 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:56:58,708 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:56:58,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:58,709 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:58,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:58,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:58,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:58,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:56:58,830 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:58,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1608301776] [2022-01-31 19:56:58,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1608301776] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:58,830 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:58,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 19:56:58,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354533375] [2022-01-31 19:56:58,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:58,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 19:56:58,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:58,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 19:56:58,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-31 19:56:58,832 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:56:58,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:58,958 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2022-01-31 19:56:58,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 19:56:58,958 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-01-31 19:56:58,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:58,959 INFO L225 Difference]: With dead ends: 81 [2022-01-31 19:56:58,959 INFO L226 Difference]: Without dead ends: 69 [2022-01-31 19:56:58,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2022-01-31 19:56:58,960 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 63 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:58,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 34 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:56:58,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-01-31 19:56:58,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 37. [2022-01-31 19:56:58,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:56:58,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2022-01-31 19:56:58,965 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 29 [2022-01-31 19:56:58,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:58,966 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2022-01-31 19:56:58,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:56:58,966 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2022-01-31 19:56:58,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 19:56:58,966 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:58,967 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:58,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 19:56:58,967 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:58,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:58,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1354142922, now seen corresponding path program 6 times [2022-01-31 19:56:58,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:58,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1485846903] [2022-01-31 19:56:58,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:58,971 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:56:58,971 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:56:58,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:58,972 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:59,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:59,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:59,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:59,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:56:59,087 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:59,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1485846903] [2022-01-31 19:56:59,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1485846903] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:59,087 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:59,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 19:56:59,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210301369] [2022-01-31 19:56:59,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:59,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 19:56:59,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:59,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 19:56:59,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-01-31 19:56:59,089 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 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 19:56:59,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:59,279 INFO L93 Difference]: Finished difference Result 89 states and 98 transitions. [2022-01-31 19:56:59,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 19:56:59,280 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 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 32 [2022-01-31 19:56:59,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:59,281 INFO L225 Difference]: With dead ends: 89 [2022-01-31 19:56:59,281 INFO L226 Difference]: Without dead ends: 77 [2022-01-31 19:56:59,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2022-01-31 19:56:59,282 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 53 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:59,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 51 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:56:59,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-01-31 19:56:59,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 40. [2022-01-31 19:56:59,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 34 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:56:59,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2022-01-31 19:56:59,289 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 32 [2022-01-31 19:56:59,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:59,289 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2022-01-31 19:56:59,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 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 19:56:59,290 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2022-01-31 19:56:59,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-31 19:56:59,290 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:59,290 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:59,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 19:56:59,291 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:59,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:59,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1017239413, now seen corresponding path program 7 times [2022-01-31 19:56:59,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:59,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [26719779] [2022-01-31 19:56:59,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:59,295 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:56:59,295 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:56:59,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:59,297 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:59,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:59,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:59,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:59,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:56:59,413 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:59,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [26719779] [2022-01-31 19:56:59,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [26719779] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:59,413 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:59,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 19:56:59,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999239992] [2022-01-31 19:56:59,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:59,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 19:56:59,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:59,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 19:56:59,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2022-01-31 19:56:59,415 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:56:59,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:59,548 INFO L93 Difference]: Finished difference Result 97 states and 107 transitions. [2022-01-31 19:56:59,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 19:56:59,548 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-01-31 19:56:59,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:59,549 INFO L225 Difference]: With dead ends: 97 [2022-01-31 19:56:59,549 INFO L226 Difference]: Without dead ends: 85 [2022-01-31 19:56:59,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=74, Unknown=0, NotChecked=0, Total=132 [2022-01-31 19:56:59,550 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 103 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:59,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 38 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:56:59,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-01-31 19:56:59,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 43. [2022-01-31 19:56:59,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 37 states have (on average 1.054054054054054) internal successors, (39), 37 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:56:59,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2022-01-31 19:56:59,557 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 35 [2022-01-31 19:56:59,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:59,557 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2022-01-31 19:56:59,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:56:59,557 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2022-01-31 19:56:59,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-31 19:56:59,558 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:59,558 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:59,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 19:56:59,559 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:59,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:59,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1663373546, now seen corresponding path program 8 times [2022-01-31 19:56:59,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:59,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1050833320] [2022-01-31 19:56:59,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:59,564 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:56:59,564 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:56:59,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:59,565 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:59,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:59,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:59,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:59,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:56:59,706 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:59,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1050833320] [2022-01-31 19:56:59,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1050833320] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:59,707 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:59,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 19:56:59,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200333867] [2022-01-31 19:56:59,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:59,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 19:56:59,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:59,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 19:56:59,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-01-31 19:56:59,709 INFO L87 Difference]: Start difference. First operand 43 states and 44 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 19:56:59,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:59,849 INFO L93 Difference]: Finished difference Result 105 states and 116 transitions. [2022-01-31 19:56:59,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 19:56:59,850 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 38 [2022-01-31 19:56:59,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:59,852 INFO L225 Difference]: With dead ends: 105 [2022-01-31 19:56:59,852 INFO L226 Difference]: Without dead ends: 93 [2022-01-31 19:56:59,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=87, Unknown=0, NotChecked=0, Total=156 [2022-01-31 19:56:59,853 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 84 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:59,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 45 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:56:59,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-01-31 19:56:59,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 46. [2022-01-31 19:56:59,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 40 states have (on average 1.05) internal successors, (42), 40 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:56:59,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2022-01-31 19:56:59,866 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 38 [2022-01-31 19:56:59,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:59,867 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2022-01-31 19:56:59,867 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 19:56:59,867 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2022-01-31 19:56:59,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-31 19:56:59,868 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:59,868 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:59,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 19:56:59,868 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:59,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:59,869 INFO L85 PathProgramCache]: Analyzing trace with hash 601909077, now seen corresponding path program 9 times [2022-01-31 19:56:59,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:59,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [226748326] [2022-01-31 19:56:59,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:59,873 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:56:59,873 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:56:59,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:59,875 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:59,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:00,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:00,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:00,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:00,012 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:00,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [226748326] [2022-01-31 19:57:00,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [226748326] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:00,012 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:00,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 19:57:00,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478807381] [2022-01-31 19:57:00,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:00,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 19:57:00,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:00,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 19:57:00,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2022-01-31 19:57:00,014 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:00,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:00,171 INFO L93 Difference]: Finished difference Result 113 states and 125 transitions. [2022-01-31 19:57:00,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 19:57:00,172 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-01-31 19:57:00,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:00,173 INFO L225 Difference]: With dead ends: 113 [2022-01-31 19:57:00,173 INFO L226 Difference]: Without dead ends: 101 [2022-01-31 19:57:00,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2022-01-31 19:57:00,174 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 86 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:00,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 57 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:57:00,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-01-31 19:57:00,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 49. [2022-01-31 19:57:00,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 43 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:57:00,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2022-01-31 19:57:00,180 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 41 [2022-01-31 19:57:00,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:00,180 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2022-01-31 19:57:00,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:00,181 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2022-01-31 19:57:00,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-31 19:57:00,181 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:00,181 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:00,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-31 19:57:00,182 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:00,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:00,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1936853750, now seen corresponding path program 10 times [2022-01-31 19:57:00,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:00,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [539597795] [2022-01-31 19:57:00,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:00,185 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:00,186 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:57:00,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:00,187 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:00,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:00,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:00,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:00,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:00,326 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:00,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [539597795] [2022-01-31 19:57:00,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [539597795] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:00,327 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:00,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 19:57:00,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214762757] [2022-01-31 19:57:00,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:00,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 19:57:00,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:00,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 19:57:00,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-01-31 19:57:00,328 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 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 19:57:00,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:00,512 INFO L93 Difference]: Finished difference Result 121 states and 134 transitions. [2022-01-31 19:57:00,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 19:57:00,513 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 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 44 [2022-01-31 19:57:00,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:00,515 INFO L225 Difference]: With dead ends: 121 [2022-01-31 19:57:00,515 INFO L226 Difference]: Without dead ends: 109 [2022-01-31 19:57:00,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=116, Unknown=0, NotChecked=0, Total=210 [2022-01-31 19:57:00,516 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 112 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:00,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 49 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:57:00,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-01-31 19:57:00,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 52. [2022-01-31 19:57:00,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 46 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:57:00,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2022-01-31 19:57:00,522 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 44 [2022-01-31 19:57:00,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:00,522 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2022-01-31 19:57:00,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 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 19:57:00,523 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2022-01-31 19:57:00,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-31 19:57:00,523 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:00,523 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:00,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 19:57:00,524 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:00,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:00,524 INFO L85 PathProgramCache]: Analyzing trace with hash 153849653, now seen corresponding path program 11 times [2022-01-31 19:57:00,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:00,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [462519258] [2022-01-31 19:57:00,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:00,528 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:00,528 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:57:00,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:00,530 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:00,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:00,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:00,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:00,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:00,691 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:00,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [462519258] [2022-01-31 19:57:00,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [462519258] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:00,691 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:00,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 19:57:00,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801419173] [2022-01-31 19:57:00,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:00,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 19:57:00,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:00,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 19:57:00,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2022-01-31 19:57:00,693 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:00,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:00,886 INFO L93 Difference]: Finished difference Result 129 states and 143 transitions. [2022-01-31 19:57:00,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 19:57:00,886 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-01-31 19:57:00,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:00,887 INFO L225 Difference]: With dead ends: 129 [2022-01-31 19:57:00,887 INFO L226 Difference]: Without dead ends: 117 [2022-01-31 19:57:00,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=132, Unknown=0, NotChecked=0, Total=240 [2022-01-31 19:57:00,888 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 108 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:00,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 56 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:57:00,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-01-31 19:57:00,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 55. [2022-01-31 19:57:00,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 49 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:57:00,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2022-01-31 19:57:00,894 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 47 [2022-01-31 19:57:00,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:00,894 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2022-01-31 19:57:00,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:00,895 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2022-01-31 19:57:00,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-31 19:57:00,895 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:00,896 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:00,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-31 19:57:00,896 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:00,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:00,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1316798166, now seen corresponding path program 12 times [2022-01-31 19:57:00,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:00,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [880174439] [2022-01-31 19:57:00,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:00,900 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:00,900 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:57:00,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:00,902 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:00,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:01,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:01,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:01,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:01,080 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:01,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [880174439] [2022-01-31 19:57:01,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [880174439] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:01,081 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:01,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 19:57:01,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889225503] [2022-01-31 19:57:01,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:01,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 19:57:01,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:01,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 19:57:01,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2022-01-31 19:57:01,082 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 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 19:57:01,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:01,305 INFO L93 Difference]: Finished difference Result 137 states and 152 transitions. [2022-01-31 19:57:01,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 19:57:01,305 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 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 50 [2022-01-31 19:57:01,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:01,306 INFO L225 Difference]: With dead ends: 137 [2022-01-31 19:57:01,307 INFO L226 Difference]: Without dead ends: 125 [2022-01-31 19:57:01,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=149, Unknown=0, NotChecked=0, Total=272 [2022-01-31 19:57:01,308 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 113 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:01,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 73 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:57:01,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-01-31 19:57:01,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 58. [2022-01-31 19:57:01,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:57:01,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2022-01-31 19:57:01,314 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 50 [2022-01-31 19:57:01,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:01,314 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2022-01-31 19:57:01,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 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 19:57:01,314 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2022-01-31 19:57:01,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-31 19:57:01,315 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:01,315 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:01,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-31 19:57:01,315 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:01,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:01,316 INFO L85 PathProgramCache]: Analyzing trace with hash -424587499, now seen corresponding path program 13 times [2022-01-31 19:57:01,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:01,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [61533524] [2022-01-31 19:57:01,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:01,319 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:01,319 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:57:01,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:01,321 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:01,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:01,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:01,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:01,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:01,505 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:01,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [61533524] [2022-01-31 19:57:01,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [61533524] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:01,505 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:01,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 19:57:01,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98541391] [2022-01-31 19:57:01,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:01,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 19:57:01,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:01,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 19:57:01,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2022-01-31 19:57:01,507 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:01,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:01,721 INFO L93 Difference]: Finished difference Result 145 states and 161 transitions. [2022-01-31 19:57:01,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 19:57:01,721 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-01-31 19:57:01,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:01,723 INFO L225 Difference]: With dead ends: 145 [2022-01-31 19:57:01,723 INFO L226 Difference]: Without dead ends: 133 [2022-01-31 19:57:01,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=139, Invalid=167, Unknown=0, NotChecked=0, Total=306 [2022-01-31 19:57:01,724 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 172 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:01,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 50 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:57:01,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-01-31 19:57:01,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 61. [2022-01-31 19:57:01,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 55 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:57:01,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2022-01-31 19:57:01,730 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 53 [2022-01-31 19:57:01,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:01,730 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2022-01-31 19:57:01,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:01,731 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2022-01-31 19:57:01,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 19:57:01,731 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:01,731 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:01,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-31 19:57:01,731 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:01,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:01,732 INFO L85 PathProgramCache]: Analyzing trace with hash -2129201846, now seen corresponding path program 14 times [2022-01-31 19:57:01,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:01,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [563205280] [2022-01-31 19:57:01,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:01,740 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:01,740 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:57:01,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:01,742 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:01,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:01,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:01,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:01,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:01,948 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:01,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [563205280] [2022-01-31 19:57:01,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [563205280] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:01,948 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:01,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 19:57:01,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274261262] [2022-01-31 19:57:01,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:01,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 19:57:01,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:01,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 19:57:01,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-01-31 19:57:01,949 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 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 19:57:02,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:02,198 INFO L93 Difference]: Finished difference Result 153 states and 170 transitions. [2022-01-31 19:57:02,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 19:57:02,198 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 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 56 [2022-01-31 19:57:02,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:02,201 INFO L225 Difference]: With dead ends: 153 [2022-01-31 19:57:02,201 INFO L226 Difference]: Without dead ends: 141 [2022-01-31 19:57:02,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=156, Invalid=186, Unknown=0, NotChecked=0, Total=342 [2022-01-31 19:57:02,202 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 171 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:02,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 57 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:57:02,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-01-31 19:57:02,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 64. [2022-01-31 19:57:02,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 58 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:57:02,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2022-01-31 19:57:02,214 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 56 [2022-01-31 19:57:02,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:02,215 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2022-01-31 19:57:02,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 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 19:57:02,215 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2022-01-31 19:57:02,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-31 19:57:02,216 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:02,216 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:02,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-31 19:57:02,216 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:02,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:02,216 INFO L85 PathProgramCache]: Analyzing trace with hash -601905419, now seen corresponding path program 15 times [2022-01-31 19:57:02,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:02,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [682481055] [2022-01-31 19:57:02,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:02,220 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:02,220 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:57:02,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:02,223 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:02,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:02,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:02,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:02,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:02,468 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:02,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [682481055] [2022-01-31 19:57:02,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [682481055] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:02,469 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:02,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 19:57:02,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212147393] [2022-01-31 19:57:02,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:02,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 19:57:02,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:02,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 19:57:02,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2022-01-31 19:57:02,470 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:02,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:02,754 INFO L93 Difference]: Finished difference Result 161 states and 179 transitions. [2022-01-31 19:57:02,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 19:57:02,755 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-01-31 19:57:02,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:02,756 INFO L225 Difference]: With dead ends: 161 [2022-01-31 19:57:02,756 INFO L226 Difference]: Without dead ends: 149 [2022-01-31 19:57:02,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=206, Unknown=0, NotChecked=0, Total=380 [2022-01-31 19:57:02,757 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 215 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:02,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 59 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:57:02,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-01-31 19:57:02,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 67. [2022-01-31 19:57:02,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 61 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:57:02,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2022-01-31 19:57:02,766 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 59 [2022-01-31 19:57:02,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:02,767 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2022-01-31 19:57:02,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:02,767 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2022-01-31 19:57:02,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 19:57:02,767 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:02,768 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:02,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-31 19:57:02,768 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:02,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:02,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1797582486, now seen corresponding path program 16 times [2022-01-31 19:57:02,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:02,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1813401396] [2022-01-31 19:57:02,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:02,772 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:02,772 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:57:02,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:02,775 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:02,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:03,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:03,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:03,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:03,031 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:03,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1813401396] [2022-01-31 19:57:03,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1813401396] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:03,031 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:03,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 19:57:03,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378573218] [2022-01-31 19:57:03,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:03,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 19:57:03,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:03,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 19:57:03,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2022-01-31 19:57:03,032 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand has 20 states, 20 states have (on average 2.9) internal successors, (58), 19 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 19:57:03,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:03,269 INFO L93 Difference]: Finished difference Result 169 states and 188 transitions. [2022-01-31 19:57:03,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 19:57:03,269 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 19 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 62 [2022-01-31 19:57:03,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:03,270 INFO L225 Difference]: With dead ends: 169 [2022-01-31 19:57:03,270 INFO L226 Difference]: Without dead ends: 157 [2022-01-31 19:57:03,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=193, Invalid=227, Unknown=0, NotChecked=0, Total=420 [2022-01-31 19:57:03,271 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 136 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:03,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 81 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:57:03,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-01-31 19:57:03,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 70. [2022-01-31 19:57:03,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 64 states have (on average 1.03125) internal successors, (66), 64 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:57:03,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2022-01-31 19:57:03,276 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 62 [2022-01-31 19:57:03,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:03,276 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2022-01-31 19:57:03,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 19 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 19:57:03,276 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2022-01-31 19:57:03,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-31 19:57:03,277 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:03,277 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:03,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-31 19:57:03,277 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:03,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:03,277 INFO L85 PathProgramCache]: Analyzing trace with hash 245667541, now seen corresponding path program 17 times [2022-01-31 19:57:03,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:03,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [897865735] [2022-01-31 19:57:03,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:03,283 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:03,283 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:57:03,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:03,285 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:03,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:03,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:03,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:03,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:03,499 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:03,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [897865735] [2022-01-31 19:57:03,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [897865735] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:03,499 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:03,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 19:57:03,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030884684] [2022-01-31 19:57:03,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:03,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 19:57:03,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:03,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 19:57:03,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2022-01-31 19:57:03,500 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 20 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:03,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:03,786 INFO L93 Difference]: Finished difference Result 177 states and 197 transitions. [2022-01-31 19:57:03,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 19:57:03,787 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 20 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2022-01-31 19:57:03,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:03,789 INFO L225 Difference]: With dead ends: 177 [2022-01-31 19:57:03,789 INFO L226 Difference]: Without dead ends: 165 [2022-01-31 19:57:03,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=213, Invalid=249, Unknown=0, NotChecked=0, Total=462 [2022-01-31 19:57:03,794 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 180 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:03,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 68 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:57:03,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-01-31 19:57:03,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 73. [2022-01-31 19:57:03,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 67 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:57:03,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2022-01-31 19:57:03,806 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 65 [2022-01-31 19:57:03,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:03,807 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2022-01-31 19:57:03,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 20 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:03,807 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2022-01-31 19:57:03,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-31 19:57:03,811 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:03,811 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:03,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-31 19:57:03,812 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:03,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:03,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1864264310, now seen corresponding path program 18 times [2022-01-31 19:57:03,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:03,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [631405926] [2022-01-31 19:57:03,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:03,816 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:03,816 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:57:03,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:03,819 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:03,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:04,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:04,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:04,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:04,075 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:04,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [631405926] [2022-01-31 19:57:04,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [631405926] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:04,075 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:04,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 19:57:04,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474300087] [2022-01-31 19:57:04,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:04,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 19:57:04,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:04,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 19:57:04,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2022-01-31 19:57:04,077 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 21 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 19:57:04,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:04,339 INFO L93 Difference]: Finished difference Result 185 states and 206 transitions. [2022-01-31 19:57:04,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 19:57:04,343 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 21 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 68 [2022-01-31 19:57:04,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:04,345 INFO L225 Difference]: With dead ends: 185 [2022-01-31 19:57:04,345 INFO L226 Difference]: Without dead ends: 173 [2022-01-31 19:57:04,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=234, Invalid=272, Unknown=0, NotChecked=0, Total=506 [2022-01-31 19:57:04,345 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 206 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:04,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 70 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:57:04,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-01-31 19:57:04,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 76. [2022-01-31 19:57:04,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 70 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:57:04,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2022-01-31 19:57:04,353 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 68 [2022-01-31 19:57:04,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:04,353 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2022-01-31 19:57:04,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 21 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 19:57:04,353 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2022-01-31 19:57:04,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-31 19:57:04,354 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:04,354 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:04,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-31 19:57:04,354 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:04,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:04,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1997660491, now seen corresponding path program 19 times [2022-01-31 19:57:04,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:04,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1946572410] [2022-01-31 19:57:04,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:04,358 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:04,358 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:57:04,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:04,361 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:04,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:04,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:04,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:04,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:04,648 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:04,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1946572410] [2022-01-31 19:57:04,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1946572410] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:04,648 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:04,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 19:57:04,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137908776] [2022-01-31 19:57:04,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:04,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 19:57:04,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:04,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 19:57:04,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2022-01-31 19:57:04,650 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 22 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:04,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:04,946 INFO L93 Difference]: Finished difference Result 193 states and 215 transitions. [2022-01-31 19:57:04,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 19:57:04,949 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 22 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2022-01-31 19:57:04,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:04,950 INFO L225 Difference]: With dead ends: 193 [2022-01-31 19:57:04,950 INFO L226 Difference]: Without dead ends: 181 [2022-01-31 19:57:04,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=256, Invalid=296, Unknown=0, NotChecked=0, Total=552 [2022-01-31 19:57:04,951 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 229 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:04,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 62 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:57:04,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-01-31 19:57:04,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 79. [2022-01-31 19:57:04,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 73 states have internal predecessors, (75), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:57:04,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2022-01-31 19:57:04,959 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 71 [2022-01-31 19:57:04,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:04,959 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2022-01-31 19:57:04,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 22 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:04,960 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2022-01-31 19:57:04,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 19:57:04,960 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:04,960 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:04,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-31 19:57:04,961 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:04,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:04,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1136427434, now seen corresponding path program 20 times [2022-01-31 19:57:04,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:04,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [445977184] [2022-01-31 19:57:04,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:04,965 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:04,965 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:57:04,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:04,970 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:05,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:05,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:05,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:05,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:05,282 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:05,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [445977184] [2022-01-31 19:57:05,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [445977184] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:05,282 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:05,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 19:57:05,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359521128] [2022-01-31 19:57:05,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:05,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 19:57:05,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:05,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 19:57:05,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2022-01-31 19:57:05,284 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 23 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 19:57:05,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:05,575 INFO L93 Difference]: Finished difference Result 201 states and 224 transitions. [2022-01-31 19:57:05,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 19:57:05,575 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 23 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 74 [2022-01-31 19:57:05,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:05,576 INFO L225 Difference]: With dead ends: 201 [2022-01-31 19:57:05,576 INFO L226 Difference]: Without dead ends: 189 [2022-01-31 19:57:05,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=279, Invalid=321, Unknown=0, NotChecked=0, Total=600 [2022-01-31 19:57:05,577 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 189 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:05,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 74 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:57:05,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-01-31 19:57:05,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 82. [2022-01-31 19:57:05,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 76 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:57:05,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2022-01-31 19:57:05,582 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 74 [2022-01-31 19:57:05,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:05,583 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2022-01-31 19:57:05,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 23 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 19:57:05,583 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2022-01-31 19:57:05,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-31 19:57:05,583 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:05,583 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:05,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-31 19:57:05,584 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:05,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:05,584 INFO L85 PathProgramCache]: Analyzing trace with hash 455753365, now seen corresponding path program 21 times [2022-01-31 19:57:05,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:05,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1638764689] [2022-01-31 19:57:05,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:05,587 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:05,587 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:57:05,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:05,590 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:05,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:05,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:05,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:05,894 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 19:57:05,894 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:05,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1638764689] [2022-01-31 19:57:05,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1638764689] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:05,895 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:05,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 19:57:05,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834708779] [2022-01-31 19:57:05,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:05,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 19:57:05,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:05,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 19:57:05,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2022-01-31 19:57:05,896 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:06,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:06,225 INFO L93 Difference]: Finished difference Result 209 states and 233 transitions. [2022-01-31 19:57:06,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 19:57:06,225 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2022-01-31 19:57:06,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:06,227 INFO L225 Difference]: With dead ends: 209 [2022-01-31 19:57:06,227 INFO L226 Difference]: Without dead ends: 197 [2022-01-31 19:57:06,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2022-01-31 19:57:06,228 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 275 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:06,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 76 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:57:06,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-01-31 19:57:06,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 85. [2022-01-31 19:57:06,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 79 states have (on average 1.0253164556962024) internal successors, (81), 79 states have internal predecessors, (81), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:57:06,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2022-01-31 19:57:06,233 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 77 [2022-01-31 19:57:06,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:06,234 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2022-01-31 19:57:06,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:06,234 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2022-01-31 19:57:06,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-31 19:57:06,234 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:06,235 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:06,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-31 19:57:06,235 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:06,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:06,235 INFO L85 PathProgramCache]: Analyzing trace with hash -964831798, now seen corresponding path program 22 times [2022-01-31 19:57:06,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:06,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2146822686] [2022-01-31 19:57:06,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:06,238 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:06,238 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:57:06,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:06,241 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:06,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:06,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:06,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:06,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:06,612 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:06,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2146822686] [2022-01-31 19:57:06,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2146822686] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:06,612 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:06,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 19:57:06,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646088957] [2022-01-31 19:57:06,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:06,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 19:57:06,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:06,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 19:57:06,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-01-31 19:57:06,614 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 25 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 19:57:06,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:06,968 INFO L93 Difference]: Finished difference Result 217 states and 242 transitions. [2022-01-31 19:57:06,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 19:57:06,968 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 25 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 80 [2022-01-31 19:57:06,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:06,970 INFO L225 Difference]: With dead ends: 217 [2022-01-31 19:57:06,970 INFO L226 Difference]: Without dead ends: 205 [2022-01-31 19:57:06,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=328, Invalid=374, Unknown=0, NotChecked=0, Total=702 [2022-01-31 19:57:06,971 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 214 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:06,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 88 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:57:06,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-01-31 19:57:06,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 88. [2022-01-31 19:57:06,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 82 states have (on average 1.024390243902439) internal successors, (84), 82 states have internal predecessors, (84), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:57:06,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2022-01-31 19:57:06,977 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 80 [2022-01-31 19:57:06,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:06,977 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2022-01-31 19:57:06,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 25 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 19:57:06,978 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2022-01-31 19:57:06,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-31 19:57:06,978 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:06,978 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:06,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-31 19:57:06,979 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:06,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:06,979 INFO L85 PathProgramCache]: Analyzing trace with hash 990312053, now seen corresponding path program 23 times [2022-01-31 19:57:06,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:06,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [10320063] [2022-01-31 19:57:06,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:06,983 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:06,983 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:57:06,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:06,987 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:07,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:07,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:07,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:07,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:07,354 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:07,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [10320063] [2022-01-31 19:57:07,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [10320063] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:07,354 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:07,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 19:57:07,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991724360] [2022-01-31 19:57:07,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:07,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 19:57:07,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:07,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 19:57:07,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2022-01-31 19:57:07,356 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 26 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:07,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:07,737 INFO L93 Difference]: Finished difference Result 225 states and 251 transitions. [2022-01-31 19:57:07,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 19:57:07,738 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 26 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-01-31 19:57:07,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:07,739 INFO L225 Difference]: With dead ends: 225 [2022-01-31 19:57:07,739 INFO L226 Difference]: Without dead ends: 213 [2022-01-31 19:57:07,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=354, Invalid=402, Unknown=0, NotChecked=0, Total=756 [2022-01-31 19:57:07,740 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 207 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:07,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 100 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:57:07,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-01-31 19:57:07,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 91. [2022-01-31 19:57:07,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 85 states have (on average 1.0235294117647058) internal successors, (87), 85 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:57:07,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2022-01-31 19:57:07,747 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 83 [2022-01-31 19:57:07,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:07,747 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2022-01-31 19:57:07,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 26 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:07,748 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2022-01-31 19:57:07,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-01-31 19:57:07,748 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:07,748 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:07,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-01-31 19:57:07,749 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:07,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:07,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1665691158, now seen corresponding path program 24 times [2022-01-31 19:57:07,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:07,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1455343715] [2022-01-31 19:57:07,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:07,752 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:07,752 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:57:07,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:07,756 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:07,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:08,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:08,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:08,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:08,144 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:08,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1455343715] [2022-01-31 19:57:08,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1455343715] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:08,144 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:08,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 19:57:08,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390358775] [2022-01-31 19:57:08,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:08,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 19:57:08,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:08,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 19:57:08,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2022-01-31 19:57:08,146 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand has 28 states, 28 states have (on average 2.9285714285714284) internal successors, (82), 27 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 19:57:08,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:08,517 INFO L93 Difference]: Finished difference Result 233 states and 260 transitions. [2022-01-31 19:57:08,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 19:57:08,518 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.9285714285714284) internal successors, (82), 27 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 86 [2022-01-31 19:57:08,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:08,519 INFO L225 Difference]: With dead ends: 233 [2022-01-31 19:57:08,519 INFO L226 Difference]: Without dead ends: 221 [2022-01-31 19:57:08,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=381, Invalid=431, Unknown=0, NotChecked=0, Total=812 [2022-01-31 19:57:08,520 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 263 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:08,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 87 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:57:08,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-01-31 19:57:08,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 94. [2022-01-31 19:57:08,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 88 states have (on average 1.0227272727272727) internal successors, (90), 88 states have internal predecessors, (90), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:57:08,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2022-01-31 19:57:08,527 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 86 [2022-01-31 19:57:08,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:08,527 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2022-01-31 19:57:08,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.9285714285714284) internal successors, (82), 27 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 19:57:08,527 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2022-01-31 19:57:08,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-01-31 19:57:08,528 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:08,528 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:08,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-01-31 19:57:08,528 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:08,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:08,529 INFO L85 PathProgramCache]: Analyzing trace with hash -474855851, now seen corresponding path program 25 times [2022-01-31 19:57:08,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:08,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1084943847] [2022-01-31 19:57:08,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:08,532 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:08,532 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:57:08,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:08,536 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:08,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:08,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:08,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:08,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:08,962 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:08,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1084943847] [2022-01-31 19:57:08,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1084943847] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:08,962 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:08,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 19:57:08,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929776388] [2022-01-31 19:57:08,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:08,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 19:57:08,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:08,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 19:57:08,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2022-01-31 19:57:08,964 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand has 29 states, 29 states have (on average 2.9310344827586206) internal successors, (85), 28 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:09,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:09,351 INFO L93 Difference]: Finished difference Result 241 states and 269 transitions. [2022-01-31 19:57:09,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 19:57:09,352 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.9310344827586206) internal successors, (85), 28 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2022-01-31 19:57:09,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:09,354 INFO L225 Difference]: With dead ends: 241 [2022-01-31 19:57:09,354 INFO L226 Difference]: Without dead ends: 229 [2022-01-31 19:57:09,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=409, Invalid=461, Unknown=0, NotChecked=0, Total=870 [2022-01-31 19:57:09,355 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 256 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:09,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 94 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:57:09,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-01-31 19:57:09,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 97. [2022-01-31 19:57:09,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 91 states have (on average 1.021978021978022) internal successors, (93), 91 states have internal predecessors, (93), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:57:09,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2022-01-31 19:57:09,363 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 89 [2022-01-31 19:57:09,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:09,363 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2022-01-31 19:57:09,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.9310344827586206) internal successors, (85), 28 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:09,363 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2022-01-31 19:57:09,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-01-31 19:57:09,364 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:09,364 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:09,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-01-31 19:57:09,364 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:09,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:09,365 INFO L85 PathProgramCache]: Analyzing trace with hash -730089974, now seen corresponding path program 26 times [2022-01-31 19:57:09,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:09,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2006202209] [2022-01-31 19:57:09,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:09,368 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:09,368 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:57:09,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:09,372 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:09,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:09,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:09,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:09,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:09,808 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:09,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2006202209] [2022-01-31 19:57:09,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2006202209] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:09,809 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:09,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 19:57:09,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926487150] [2022-01-31 19:57:09,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:09,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 19:57:09,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:09,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 19:57:09,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2022-01-31 19:57:09,810 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand has 30 states, 30 states have (on average 2.933333333333333) internal successors, (88), 29 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 19:57:10,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:10,192 INFO L93 Difference]: Finished difference Result 249 states and 278 transitions. [2022-01-31 19:57:10,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 19:57:10,193 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.933333333333333) internal successors, (88), 29 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 92 [2022-01-31 19:57:10,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:10,194 INFO L225 Difference]: With dead ends: 249 [2022-01-31 19:57:10,194 INFO L226 Difference]: Without dead ends: 237 [2022-01-31 19:57:10,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=438, Invalid=492, Unknown=0, NotChecked=0, Total=930 [2022-01-31 19:57:10,195 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 267 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:10,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 91 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:57:10,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-01-31 19:57:10,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 100. [2022-01-31 19:57:10,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 94 states have (on average 1.0212765957446808) internal successors, (96), 94 states have internal predecessors, (96), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:57:10,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2022-01-31 19:57:10,201 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 92 [2022-01-31 19:57:10,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:10,201 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2022-01-31 19:57:10,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.933333333333333) internal successors, (88), 29 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 19:57:10,201 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2022-01-31 19:57:10,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-01-31 19:57:10,202 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:10,202 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:10,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-01-31 19:57:10,203 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:10,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:10,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1977232949, now seen corresponding path program 27 times [2022-01-31 19:57:10,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:10,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1200618155] [2022-01-31 19:57:10,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:10,207 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:10,207 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:57:10,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:10,211 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:10,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:10,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:10,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:10,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:10,650 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:10,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1200618155] [2022-01-31 19:57:10,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1200618155] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:10,650 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:10,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 19:57:10,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667004579] [2022-01-31 19:57:10,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:10,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 19:57:10,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:10,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 19:57:10,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2022-01-31 19:57:10,652 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand has 31 states, 31 states have (on average 2.935483870967742) internal successors, (91), 30 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:11,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:11,056 INFO L93 Difference]: Finished difference Result 257 states and 287 transitions. [2022-01-31 19:57:11,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 19:57:11,056 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.935483870967742) internal successors, (91), 30 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2022-01-31 19:57:11,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:11,058 INFO L225 Difference]: With dead ends: 257 [2022-01-31 19:57:11,058 INFO L226 Difference]: Without dead ends: 245 [2022-01-31 19:57:11,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=468, Invalid=524, Unknown=0, NotChecked=0, Total=992 [2022-01-31 19:57:11,059 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 302 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:11,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [330 Valid, 98 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:57:11,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-01-31 19:57:11,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 103. [2022-01-31 19:57:11,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 97 states have (on average 1.0206185567010309) internal successors, (99), 97 states have internal predecessors, (99), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:57:11,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2022-01-31 19:57:11,065 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 95 [2022-01-31 19:57:11,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:11,065 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2022-01-31 19:57:11,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.935483870967742) internal successors, (91), 30 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:11,065 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2022-01-31 19:57:11,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-01-31 19:57:11,066 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:11,066 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:11,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-01-31 19:57:11,066 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:11,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:11,066 INFO L85 PathProgramCache]: Analyzing trace with hash 643580458, now seen corresponding path program 28 times [2022-01-31 19:57:11,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:11,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1645816956] [2022-01-31 19:57:11,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:11,069 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:11,069 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:57:11,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:11,074 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:11,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:11,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:11,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:11,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:11,539 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:11,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1645816956] [2022-01-31 19:57:11,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1645816956] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:11,539 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:11,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 19:57:11,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415660856] [2022-01-31 19:57:11,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:11,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 19:57:11,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:11,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 19:57:11,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2022-01-31 19:57:11,540 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand has 32 states, 32 states have (on average 2.9375) internal successors, (94), 31 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 19:57:11,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:11,944 INFO L93 Difference]: Finished difference Result 265 states and 296 transitions. [2022-01-31 19:57:11,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 19:57:11,944 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.9375) internal successors, (94), 31 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 98 [2022-01-31 19:57:11,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:11,945 INFO L225 Difference]: With dead ends: 265 [2022-01-31 19:57:11,946 INFO L226 Difference]: Without dead ends: 253 [2022-01-31 19:57:11,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=499, Invalid=557, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 19:57:11,947 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 364 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:11,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [393 Valid, 90 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:57:11,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-01-31 19:57:11,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 106. [2022-01-31 19:57:11,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 100 states have (on average 1.02) internal successors, (102), 100 states have internal predecessors, (102), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:57:11,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2022-01-31 19:57:11,953 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 98 [2022-01-31 19:57:11,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:11,953 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2022-01-31 19:57:11,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.9375) internal successors, (94), 31 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 19:57:11,953 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2022-01-31 19:57:11,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-01-31 19:57:11,954 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:11,954 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:11,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-01-31 19:57:11,954 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:11,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:11,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1750290923, now seen corresponding path program 29 times [2022-01-31 19:57:11,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:11,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [239658721] [2022-01-31 19:57:11,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:11,957 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:11,958 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:57:11,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:11,962 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:12,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:12,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:12,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:12,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:12,406 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:12,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [239658721] [2022-01-31 19:57:12,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [239658721] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:12,407 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:12,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 19:57:12,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638457482] [2022-01-31 19:57:12,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:12,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 19:57:12,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:12,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 19:57:12,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 19:57:12,408 INFO L87 Difference]: Start difference. First operand 106 states and 107 transitions. Second operand has 33 states, 33 states have (on average 2.9393939393939394) internal successors, (97), 32 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:12,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:12,894 INFO L93 Difference]: Finished difference Result 273 states and 305 transitions. [2022-01-31 19:57:12,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 19:57:12,894 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.9393939393939394) internal successors, (97), 32 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 101 [2022-01-31 19:57:12,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:12,895 INFO L225 Difference]: With dead ends: 273 [2022-01-31 19:57:12,895 INFO L226 Difference]: Without dead ends: 261 [2022-01-31 19:57:12,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=531, Invalid=591, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 19:57:12,897 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 402 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:12,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [432 Valid, 97 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:57:12,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-01-31 19:57:12,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 109. [2022-01-31 19:57:12,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 103 states have (on average 1.0194174757281553) internal successors, (105), 103 states have internal predecessors, (105), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:57:12,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2022-01-31 19:57:12,904 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 101 [2022-01-31 19:57:12,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:12,904 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2022-01-31 19:57:12,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.9393939393939394) internal successors, (97), 32 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:12,904 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2022-01-31 19:57:12,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-01-31 19:57:12,905 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:12,905 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:12,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-01-31 19:57:12,906 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:12,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:12,906 INFO L85 PathProgramCache]: Analyzing trace with hash 359347786, now seen corresponding path program 30 times [2022-01-31 19:57:12,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:12,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1716417725] [2022-01-31 19:57:12,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:12,909 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:12,909 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:57:12,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:12,914 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:12,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:13,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:13,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:13,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:13,384 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:13,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1716417725] [2022-01-31 19:57:13,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1716417725] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:13,384 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:13,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 19:57:13,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370006193] [2022-01-31 19:57:13,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:13,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 19:57:13,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:13,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 19:57:13,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 19:57:13,386 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand has 34 states, 34 states have (on average 2.9411764705882355) internal successors, (100), 33 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 19:57:13,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:13,886 INFO L93 Difference]: Finished difference Result 281 states and 314 transitions. [2022-01-31 19:57:13,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 19:57:13,887 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.9411764705882355) internal successors, (100), 33 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 104 [2022-01-31 19:57:13,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:13,888 INFO L225 Difference]: With dead ends: 281 [2022-01-31 19:57:13,888 INFO L226 Difference]: Without dead ends: 269 [2022-01-31 19:57:13,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=564, Invalid=626, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 19:57:13,889 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 296 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:13,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [327 Valid, 99 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:57:13,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-01-31 19:57:13,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 112. [2022-01-31 19:57:13,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 106 states have (on average 1.0188679245283019) internal successors, (108), 106 states have internal predecessors, (108), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:57:13,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2022-01-31 19:57:13,897 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 104 [2022-01-31 19:57:13,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:13,897 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2022-01-31 19:57:13,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.9411764705882355) internal successors, (100), 33 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 19:57:13,897 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2022-01-31 19:57:13,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-01-31 19:57:13,898 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:13,898 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:13,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-01-31 19:57:13,899 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:13,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:13,899 INFO L85 PathProgramCache]: Analyzing trace with hash 349685237, now seen corresponding path program 31 times [2022-01-31 19:57:13,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:13,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [236780363] [2022-01-31 19:57:13,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:13,902 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:13,902 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:57:13,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:13,908 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:13,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:14,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:14,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:14,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:14,460 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:14,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [236780363] [2022-01-31 19:57:14,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [236780363] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:14,460 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:14,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 19:57:14,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199008960] [2022-01-31 19:57:14,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:14,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 19:57:14,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:14,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 19:57:14,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 19:57:14,462 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand has 35 states, 35 states have (on average 2.942857142857143) internal successors, (103), 34 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:14,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:14,954 INFO L93 Difference]: Finished difference Result 289 states and 323 transitions. [2022-01-31 19:57:14,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 19:57:14,954 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.942857142857143) internal successors, (103), 34 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 107 [2022-01-31 19:57:14,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:14,956 INFO L225 Difference]: With dead ends: 289 [2022-01-31 19:57:14,956 INFO L226 Difference]: Without dead ends: 277 [2022-01-31 19:57:14,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=598, Invalid=662, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 19:57:14,957 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 412 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:14,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [444 Valid, 96 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:57:14,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-01-31 19:57:14,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 115. [2022-01-31 19:57:14,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 109 states have (on average 1.018348623853211) internal successors, (111), 109 states have internal predecessors, (111), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:57:14,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2022-01-31 19:57:14,964 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 107 [2022-01-31 19:57:14,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:14,964 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2022-01-31 19:57:14,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.942857142857143) internal successors, (103), 34 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:14,964 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2022-01-31 19:57:14,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-01-31 19:57:14,965 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:14,965 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:14,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-01-31 19:57:14,966 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:14,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:14,966 INFO L85 PathProgramCache]: Analyzing trace with hash 255496810, now seen corresponding path program 32 times [2022-01-31 19:57:14,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:14,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1462325550] [2022-01-31 19:57:14,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:14,970 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:14,970 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:57:14,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:14,976 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:15,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:15,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:15,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:15,548 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 19:57:15,548 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:15,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1462325550] [2022-01-31 19:57:15,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1462325550] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:15,548 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:15,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 19:57:15,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461551780] [2022-01-31 19:57:15,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:15,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 19:57:15,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:15,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 19:57:15,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 19:57:15,550 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand has 36 states, 36 states have (on average 2.9444444444444446) internal successors, (106), 35 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 19:57:16,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:16,004 INFO L93 Difference]: Finished difference Result 297 states and 332 transitions. [2022-01-31 19:57:16,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 19:57:16,004 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.9444444444444446) internal successors, (106), 35 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 110 [2022-01-31 19:57:16,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:16,006 INFO L225 Difference]: With dead ends: 297 [2022-01-31 19:57:16,006 INFO L226 Difference]: Without dead ends: 285 [2022-01-31 19:57:16,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=633, Invalid=699, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 19:57:16,007 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 378 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:16,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [411 Valid, 98 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:57:16,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-01-31 19:57:16,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 118. [2022-01-31 19:57:16,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 112 states have (on average 1.0178571428571428) internal successors, (114), 112 states have internal predecessors, (114), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:57:16,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 119 transitions. [2022-01-31 19:57:16,014 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 119 transitions. Word has length 110 [2022-01-31 19:57:16,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:16,015 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 119 transitions. [2022-01-31 19:57:16,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.9444444444444446) internal successors, (106), 35 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 19:57:16,015 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 119 transitions. [2022-01-31 19:57:16,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-01-31 19:57:16,016 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:16,016 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:16,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-01-31 19:57:16,016 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:16,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:16,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1098287659, now seen corresponding path program 33 times [2022-01-31 19:57:16,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:16,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [38039016] [2022-01-31 19:57:16,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:16,020 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:16,020 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:57:16,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:16,026 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:16,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:16,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:16,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:16,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:16,568 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:16,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [38039016] [2022-01-31 19:57:16,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [38039016] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:16,568 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:16,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 19:57:16,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6297362] [2022-01-31 19:57:16,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:16,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 19:57:16,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:16,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 19:57:16,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 19:57:16,570 INFO L87 Difference]: Start difference. First operand 118 states and 119 transitions. Second operand has 37 states, 37 states have (on average 2.945945945945946) internal successors, (109), 36 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:17,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:17,033 INFO L93 Difference]: Finished difference Result 305 states and 341 transitions. [2022-01-31 19:57:17,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 19:57:17,034 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.945945945945946) internal successors, (109), 36 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 113 [2022-01-31 19:57:17,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:17,036 INFO L225 Difference]: With dead ends: 305 [2022-01-31 19:57:17,036 INFO L226 Difference]: Without dead ends: 293 [2022-01-31 19:57:17,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=669, Invalid=737, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 19:57:17,037 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 446 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:17,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [480 Valid, 100 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:57:17,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-01-31 19:57:17,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 121. [2022-01-31 19:57:17,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 115 states have (on average 1.017391304347826) internal successors, (117), 115 states have internal predecessors, (117), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:57:17,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2022-01-31 19:57:17,044 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 113 [2022-01-31 19:57:17,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:17,044 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2022-01-31 19:57:17,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.945945945945946) internal successors, (109), 36 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:17,044 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2022-01-31 19:57:17,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-01-31 19:57:17,045 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:17,045 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:17,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-01-31 19:57:17,046 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:17,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:17,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1948494198, now seen corresponding path program 34 times [2022-01-31 19:57:17,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:17,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1076533189] [2022-01-31 19:57:17,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:17,049 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:17,049 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:57:17,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:17,055 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:17,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:17,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:17,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:17,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:17,719 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:17,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1076533189] [2022-01-31 19:57:17,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1076533189] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:17,720 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:17,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 19:57:17,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265474330] [2022-01-31 19:57:17,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:17,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 19:57:17,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:17,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 19:57:17,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 19:57:17,721 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand has 38 states, 38 states have (on average 2.9473684210526314) internal successors, (112), 37 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 19:57:18,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:18,295 INFO L93 Difference]: Finished difference Result 313 states and 350 transitions. [2022-01-31 19:57:18,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 19:57:18,295 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.9473684210526314) internal successors, (112), 37 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 116 [2022-01-31 19:57:18,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:18,299 INFO L225 Difference]: With dead ends: 313 [2022-01-31 19:57:18,299 INFO L226 Difference]: Without dead ends: 301 [2022-01-31 19:57:18,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=706, Invalid=776, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 19:57:18,300 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 367 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:18,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 117 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:57:18,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2022-01-31 19:57:18,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 124. [2022-01-31 19:57:18,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 118 states have (on average 1.0169491525423728) internal successors, (120), 118 states have internal predecessors, (120), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:57:18,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 125 transitions. [2022-01-31 19:57:18,307 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 125 transitions. Word has length 116 [2022-01-31 19:57:18,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:18,308 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 125 transitions. [2022-01-31 19:57:18,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.9473684210526314) internal successors, (112), 37 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 19:57:18,308 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 125 transitions. [2022-01-31 19:57:18,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-01-31 19:57:18,309 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:18,309 INFO L514 BasicCegarLoop]: trace histogram [35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:18,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-01-31 19:57:18,309 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:18,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:18,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1265614261, now seen corresponding path program 35 times [2022-01-31 19:57:18,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:18,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1982877181] [2022-01-31 19:57:18,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:18,314 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:18,314 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:57:18,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:18,320 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:18,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:18,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:18,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:18,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:18,929 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:18,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1982877181] [2022-01-31 19:57:18,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1982877181] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:18,929 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:18,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-01-31 19:57:18,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909029637] [2022-01-31 19:57:18,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:18,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 19:57:18,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:18,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 19:57:18,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 19:57:18,931 INFO L87 Difference]: Start difference. First operand 124 states and 125 transitions. Second operand has 39 states, 39 states have (on average 2.948717948717949) internal successors, (115), 38 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:19,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:19,494 INFO L93 Difference]: Finished difference Result 321 states and 359 transitions. [2022-01-31 19:57:19,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 19:57:19,499 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.948717948717949) internal successors, (115), 38 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 119 [2022-01-31 19:57:19,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:19,501 INFO L225 Difference]: With dead ends: 321 [2022-01-31 19:57:19,501 INFO L226 Difference]: Without dead ends: 309 [2022-01-31 19:57:19,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=744, Invalid=816, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 19:57:19,502 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 420 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 233 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 233 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:19,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [456 Valid, 109 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [233 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:57:19,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2022-01-31 19:57:19,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 127. [2022-01-31 19:57:19,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 121 states have (on average 1.0165289256198347) internal successors, (123), 121 states have internal predecessors, (123), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:57:19,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2022-01-31 19:57:19,508 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 119 [2022-01-31 19:57:19,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:19,508 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2022-01-31 19:57:19,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.948717948717949) internal successors, (115), 38 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:19,509 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2022-01-31 19:57:19,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-01-31 19:57:19,509 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:19,510 INFO L514 BasicCegarLoop]: trace histogram [36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:19,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-01-31 19:57:19,510 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:19,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:19,510 INFO L85 PathProgramCache]: Analyzing trace with hash 769819306, now seen corresponding path program 36 times [2022-01-31 19:57:19,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:19,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1381913653] [2022-01-31 19:57:19,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:19,514 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:19,514 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:57:19,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:19,520 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:19,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:20,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:20,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:20,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:20,116 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:20,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1381913653] [2022-01-31 19:57:20,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1381913653] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:20,116 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:20,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-01-31 19:57:20,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724902379] [2022-01-31 19:57:20,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:20,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 19:57:20,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:20,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 19:57:20,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 19:57:20,118 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand has 40 states, 40 states have (on average 2.95) internal successors, (118), 39 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 19:57:20,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:20,595 INFO L93 Difference]: Finished difference Result 329 states and 368 transitions. [2022-01-31 19:57:20,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 19:57:20,596 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.95) internal successors, (118), 39 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 122 [2022-01-31 19:57:20,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:20,598 INFO L225 Difference]: With dead ends: 329 [2022-01-31 19:57:20,598 INFO L226 Difference]: Without dead ends: 317 [2022-01-31 19:57:20,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=783, Invalid=857, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 19:57:20,599 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 440 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 250 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 250 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:20,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [477 Valid, 116 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [250 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:57:20,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2022-01-31 19:57:20,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 130. [2022-01-31 19:57:20,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 124 states have (on average 1.0161290322580645) internal successors, (126), 124 states have internal predecessors, (126), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:57:20,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 131 transitions. [2022-01-31 19:57:20,605 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 131 transitions. Word has length 122 [2022-01-31 19:57:20,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:20,605 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 131 transitions. [2022-01-31 19:57:20,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.95) internal successors, (118), 39 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 19:57:20,606 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 131 transitions. [2022-01-31 19:57:20,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-01-31 19:57:20,607 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:20,607 INFO L514 BasicCegarLoop]: trace histogram [37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:20,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-01-31 19:57:20,607 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:20,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:20,607 INFO L85 PathProgramCache]: Analyzing trace with hash 934845845, now seen corresponding path program 37 times [2022-01-31 19:57:20,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:20,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1895606821] [2022-01-31 19:57:20,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:20,610 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:20,610 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:57:20,611 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:20,616 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:20,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:21,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:21,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:21,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:21,268 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:21,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1895606821] [2022-01-31 19:57:21,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1895606821] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:21,268 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:21,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-01-31 19:57:21,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198731580] [2022-01-31 19:57:21,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:21,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-31 19:57:21,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:21,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-31 19:57:21,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 19:57:21,270 INFO L87 Difference]: Start difference. First operand 130 states and 131 transitions. Second operand has 41 states, 41 states have (on average 2.951219512195122) internal successors, (121), 40 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:21,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:21,751 INFO L93 Difference]: Finished difference Result 337 states and 377 transitions. [2022-01-31 19:57:21,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-31 19:57:21,752 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.951219512195122) internal successors, (121), 40 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 125 [2022-01-31 19:57:21,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:21,753 INFO L225 Difference]: With dead ends: 337 [2022-01-31 19:57:21,753 INFO L226 Difference]: Without dead ends: 325 [2022-01-31 19:57:21,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=823, Invalid=899, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 19:57:21,754 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 394 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:21,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [432 Valid, 123 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:57:21,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2022-01-31 19:57:21,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 133. [2022-01-31 19:57:21,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 127 states have (on average 1.015748031496063) internal successors, (129), 127 states have internal predecessors, (129), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:57:21,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2022-01-31 19:57:21,761 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 125 [2022-01-31 19:57:21,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:21,761 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2022-01-31 19:57:21,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.951219512195122) internal successors, (121), 40 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:21,761 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2022-01-31 19:57:21,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-01-31 19:57:21,762 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:21,762 INFO L514 BasicCegarLoop]: trace histogram [38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:21,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-01-31 19:57:21,762 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:21,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:21,763 INFO L85 PathProgramCache]: Analyzing trace with hash -497084726, now seen corresponding path program 38 times [2022-01-31 19:57:21,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:21,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1409912799] [2022-01-31 19:57:21,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:21,766 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:21,766 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:57:21,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:21,772 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:21,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:22,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:22,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:22,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:22,429 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:22,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1409912799] [2022-01-31 19:57:22,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1409912799] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:22,429 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:22,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-01-31 19:57:22,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582637812] [2022-01-31 19:57:22,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:22,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 19:57:22,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:22,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 19:57:22,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 19:57:22,431 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand has 42 states, 42 states have (on average 2.9523809523809526) internal successors, (124), 41 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 19:57:22,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:22,932 INFO L93 Difference]: Finished difference Result 345 states and 386 transitions. [2022-01-31 19:57:22,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-31 19:57:22,933 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.9523809523809526) internal successors, (124), 41 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 128 [2022-01-31 19:57:22,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:22,934 INFO L225 Difference]: With dead ends: 345 [2022-01-31 19:57:22,934 INFO L226 Difference]: Without dead ends: 333 [2022-01-31 19:57:22,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=864, Invalid=942, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 19:57:22,935 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 390 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:22,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [429 Valid, 120 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:57:22,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-01-31 19:57:22,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 136. [2022-01-31 19:57:22,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 130 states have (on average 1.0153846153846153) internal successors, (132), 130 states have internal predecessors, (132), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:57:22,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 137 transitions. [2022-01-31 19:57:22,942 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 137 transitions. Word has length 128 [2022-01-31 19:57:22,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:22,942 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 137 transitions. [2022-01-31 19:57:22,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.9523809523809526) internal successors, (124), 41 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 19:57:22,942 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 137 transitions. [2022-01-31 19:57:22,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-01-31 19:57:22,943 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:22,943 INFO L514 BasicCegarLoop]: trace histogram [39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:22,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-01-31 19:57:22,943 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:22,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:22,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1525541515, now seen corresponding path program 39 times [2022-01-31 19:57:22,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:22,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1172548296] [2022-01-31 19:57:22,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:22,947 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:22,947 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:57:22,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:22,953 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:23,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:23,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:23,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:23,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:23,636 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:23,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1172548296] [2022-01-31 19:57:23,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1172548296] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:23,636 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:23,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-01-31 19:57:23,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129175404] [2022-01-31 19:57:23,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:23,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-31 19:57:23,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:23,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-31 19:57:23,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 19:57:23,638 INFO L87 Difference]: Start difference. First operand 136 states and 137 transitions. Second operand has 43 states, 43 states have (on average 2.953488372093023) internal successors, (127), 42 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:24,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:24,110 INFO L93 Difference]: Finished difference Result 353 states and 395 transitions. [2022-01-31 19:57:24,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-31 19:57:24,110 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.953488372093023) internal successors, (127), 42 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 131 [2022-01-31 19:57:24,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:24,111 INFO L225 Difference]: With dead ends: 353 [2022-01-31 19:57:24,112 INFO L226 Difference]: Without dead ends: 341 [2022-01-31 19:57:24,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=906, Invalid=986, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 19:57:24,113 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 515 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 296 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 555 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 296 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:24,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [555 Valid, 112 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [296 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:57:24,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2022-01-31 19:57:24,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 139. [2022-01-31 19:57:24,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 133 states have (on average 1.0150375939849625) internal successors, (135), 133 states have internal predecessors, (135), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:57:24,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 140 transitions. [2022-01-31 19:57:24,119 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 140 transitions. Word has length 131 [2022-01-31 19:57:24,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:24,120 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 140 transitions. [2022-01-31 19:57:24,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.953488372093023) internal successors, (127), 42 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:24,120 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 140 transitions. [2022-01-31 19:57:24,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-01-31 19:57:24,120 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:24,120 INFO L514 BasicCegarLoop]: trace histogram [40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:24,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-01-31 19:57:24,121 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:24,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:24,121 INFO L85 PathProgramCache]: Analyzing trace with hash 14947050, now seen corresponding path program 40 times [2022-01-31 19:57:24,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:24,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1578446503] [2022-01-31 19:57:24,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:24,126 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:24,126 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:57:24,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:24,132 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:24,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:24,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:24,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:24,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:24,844 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:24,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1578446503] [2022-01-31 19:57:24,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1578446503] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:24,845 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:24,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-01-31 19:57:24,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016497693] [2022-01-31 19:57:24,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:24,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 19:57:24,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:24,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 19:57:24,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 19:57:24,847 INFO L87 Difference]: Start difference. First operand 139 states and 140 transitions. Second operand has 44 states, 44 states have (on average 2.9545454545454546) internal successors, (130), 43 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 19:57:25,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:25,349 INFO L93 Difference]: Finished difference Result 361 states and 404 transitions. [2022-01-31 19:57:25,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 19:57:25,349 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.9545454545454546) internal successors, (130), 43 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 134 [2022-01-31 19:57:25,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:25,351 INFO L225 Difference]: With dead ends: 361 [2022-01-31 19:57:25,351 INFO L226 Difference]: Without dead ends: 349 [2022-01-31 19:57:25,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=949, Invalid=1031, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 19:57:25,358 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 541 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 312 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 582 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 312 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:25,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [582 Valid, 114 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [312 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:57:25,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-01-31 19:57:25,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 142. [2022-01-31 19:57:25,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 136 states have (on average 1.0147058823529411) internal successors, (138), 136 states have internal predecessors, (138), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:57:25,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 143 transitions. [2022-01-31 19:57:25,366 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 143 transitions. Word has length 134 [2022-01-31 19:57:25,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:25,366 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 143 transitions. [2022-01-31 19:57:25,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.9545454545454546) internal successors, (130), 43 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 19:57:25,366 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 143 transitions. [2022-01-31 19:57:25,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-01-31 19:57:25,367 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:25,367 INFO L514 BasicCegarLoop]: trace histogram [41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:25,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-01-31 19:57:25,367 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:25,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:25,368 INFO L85 PathProgramCache]: Analyzing trace with hash 984229205, now seen corresponding path program 41 times [2022-01-31 19:57:25,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:25,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [225751335] [2022-01-31 19:57:25,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:25,371 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:25,371 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:57:25,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:25,377 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:25,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:26,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:26,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:26,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:26,122 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:26,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [225751335] [2022-01-31 19:57:26,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [225751335] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:26,122 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:26,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-01-31 19:57:26,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777015959] [2022-01-31 19:57:26,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:26,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-31 19:57:26,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:26,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-31 19:57:26,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 19:57:26,124 INFO L87 Difference]: Start difference. First operand 142 states and 143 transitions. Second operand has 45 states, 45 states have (on average 2.9555555555555557) internal successors, (133), 44 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:26,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:26,634 INFO L93 Difference]: Finished difference Result 369 states and 413 transitions. [2022-01-31 19:57:26,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 19:57:26,634 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.9555555555555557) internal successors, (133), 44 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 137 [2022-01-31 19:57:26,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:26,636 INFO L225 Difference]: With dead ends: 369 [2022-01-31 19:57:26,636 INFO L226 Difference]: Without dead ends: 357 [2022-01-31 19:57:26,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=993, Invalid=1077, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 19:57:26,637 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 453 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:26,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [495 Valid, 136 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:57:26,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2022-01-31 19:57:26,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 145. [2022-01-31 19:57:26,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 139 states have (on average 1.014388489208633) internal successors, (141), 139 states have internal predecessors, (141), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:57:26,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2022-01-31 19:57:26,644 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 137 [2022-01-31 19:57:26,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:26,644 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2022-01-31 19:57:26,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.9555555555555557) internal successors, (133), 44 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:26,644 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2022-01-31 19:57:26,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-01-31 19:57:26,645 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:26,645 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:26,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-01-31 19:57:26,645 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:26,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:26,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1803777802, now seen corresponding path program 42 times [2022-01-31 19:57:26,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:26,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1240655277] [2022-01-31 19:57:26,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:26,649 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:26,649 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:57:26,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:26,656 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:26,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:27,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:27,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:27,477 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 19:57:27,478 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:27,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1240655277] [2022-01-31 19:57:27,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1240655277] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:27,478 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:27,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-01-31 19:57:27,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866530566] [2022-01-31 19:57:27,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:27,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-31 19:57:27,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:27,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-31 19:57:27,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 19:57:27,479 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand has 46 states, 46 states have (on average 2.9565217391304346) internal successors, (136), 45 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 19:57:28,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:28,048 INFO L93 Difference]: Finished difference Result 377 states and 422 transitions. [2022-01-31 19:57:28,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-31 19:57:28,048 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.9565217391304346) internal successors, (136), 45 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 140 [2022-01-31 19:57:28,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:28,050 INFO L225 Difference]: With dead ends: 377 [2022-01-31 19:57:28,050 INFO L226 Difference]: Without dead ends: 365 [2022-01-31 19:57:28,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1038, Invalid=1124, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 19:57:28,051 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 695 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 411 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 738 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 411 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:28,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [738 Valid, 113 Invalid, 880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [411 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:57:28,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2022-01-31 19:57:28,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 148. [2022-01-31 19:57:28,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 142 states have (on average 1.0140845070422535) internal successors, (144), 142 states have internal predecessors, (144), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:57:28,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 149 transitions. [2022-01-31 19:57:28,058 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 149 transitions. Word has length 140 [2022-01-31 19:57:28,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:28,058 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 149 transitions. [2022-01-31 19:57:28,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.9565217391304346) internal successors, (136), 45 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 19:57:28,058 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 149 transitions. [2022-01-31 19:57:28,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-01-31 19:57:28,059 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:28,059 INFO L514 BasicCegarLoop]: trace histogram [43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:28,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-01-31 19:57:28,059 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:28,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:28,059 INFO L85 PathProgramCache]: Analyzing trace with hash 86953269, now seen corresponding path program 43 times [2022-01-31 19:57:28,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:28,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1338591010] [2022-01-31 19:57:28,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:28,066 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:28,066 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:57:28,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:28,076 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:28,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:28,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:28,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:28,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:28,944 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:28,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1338591010] [2022-01-31 19:57:28,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1338591010] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:28,944 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:28,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-01-31 19:57:28,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202854998] [2022-01-31 19:57:28,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:28,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-31 19:57:28,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:28,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-31 19:57:28,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 19:57:28,946 INFO L87 Difference]: Start difference. First operand 148 states and 149 transitions. Second operand has 47 states, 47 states have (on average 2.9574468085106385) internal successors, (139), 46 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:29,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:29,516 INFO L93 Difference]: Finished difference Result 385 states and 431 transitions. [2022-01-31 19:57:29,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 19:57:29,516 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.9574468085106385) internal successors, (139), 46 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2022-01-31 19:57:29,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:29,518 INFO L225 Difference]: With dead ends: 385 [2022-01-31 19:57:29,518 INFO L226 Difference]: Without dead ends: 373 [2022-01-31 19:57:29,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1084, Invalid=1172, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 19:57:29,519 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 475 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 519 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:29,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [519 Valid, 130 Invalid, 790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:57:29,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2022-01-31 19:57:29,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 151. [2022-01-31 19:57:29,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 145 states have (on average 1.013793103448276) internal successors, (147), 145 states have internal predecessors, (147), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:57:29,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 152 transitions. [2022-01-31 19:57:29,526 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 152 transitions. Word has length 143 [2022-01-31 19:57:29,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:29,526 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 152 transitions. [2022-01-31 19:57:29,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.9574468085106385) internal successors, (139), 46 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:29,526 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 152 transitions. [2022-01-31 19:57:29,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-01-31 19:57:29,527 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:29,527 INFO L514 BasicCegarLoop]: trace histogram [44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:29,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-01-31 19:57:29,527 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:29,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:29,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1362148566, now seen corresponding path program 44 times [2022-01-31 19:57:29,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:29,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1259325333] [2022-01-31 19:57:29,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:29,531 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:29,531 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:57:29,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:29,539 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:29,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:30,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:30,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:30,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:30,440 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:30,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1259325333] [2022-01-31 19:57:30,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1259325333] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:30,441 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:30,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-01-31 19:57:30,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372739399] [2022-01-31 19:57:30,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:30,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-31 19:57:30,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:30,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-31 19:57:30,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 19:57:30,443 INFO L87 Difference]: Start difference. First operand 151 states and 152 transitions. Second operand has 48 states, 48 states have (on average 2.9583333333333335) internal successors, (142), 47 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 19:57:31,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:31,046 INFO L93 Difference]: Finished difference Result 393 states and 440 transitions. [2022-01-31 19:57:31,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 19:57:31,047 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.9583333333333335) internal successors, (142), 47 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 146 [2022-01-31 19:57:31,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:31,048 INFO L225 Difference]: With dead ends: 393 [2022-01-31 19:57:31,048 INFO L226 Difference]: Without dead ends: 381 [2022-01-31 19:57:31,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1131, Invalid=1221, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 19:57:31,049 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 525 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 293 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 293 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:31,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [570 Valid, 132 Invalid, 879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [293 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:57:31,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2022-01-31 19:57:31,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 154. [2022-01-31 19:57:31,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 148 states have (on average 1.0135135135135136) internal successors, (150), 148 states have internal predecessors, (150), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:57:31,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 155 transitions. [2022-01-31 19:57:31,055 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 155 transitions. Word has length 146 [2022-01-31 19:57:31,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:31,055 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 155 transitions. [2022-01-31 19:57:31,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.9583333333333335) internal successors, (142), 47 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 19:57:31,056 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 155 transitions. [2022-01-31 19:57:31,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-01-31 19:57:31,056 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:31,056 INFO L514 BasicCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:31,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-01-31 19:57:31,057 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:31,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:31,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1456344341, now seen corresponding path program 45 times [2022-01-31 19:57:31,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:31,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2123852449] [2022-01-31 19:57:31,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:31,061 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:31,061 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:57:31,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:31,069 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:31,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:32,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:32,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:32,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:32,026 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:32,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2123852449] [2022-01-31 19:57:32,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2123852449] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:32,026 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:32,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-01-31 19:57:32,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055292068] [2022-01-31 19:57:32,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:32,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-31 19:57:32,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:32,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-31 19:57:32,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 19:57:32,027 INFO L87 Difference]: Start difference. First operand 154 states and 155 transitions. Second operand has 49 states, 49 states have (on average 2.9591836734693877) internal successors, (145), 48 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:32,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:32,643 INFO L93 Difference]: Finished difference Result 401 states and 449 transitions. [2022-01-31 19:57:32,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-31 19:57:32,643 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.9591836734693877) internal successors, (145), 48 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 149 [2022-01-31 19:57:32,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:32,645 INFO L225 Difference]: With dead ends: 401 [2022-01-31 19:57:32,645 INFO L226 Difference]: Without dead ends: 389 [2022-01-31 19:57:32,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1179, Invalid=1271, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 19:57:32,646 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 578 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 325 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 624 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 325 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:32,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [624 Valid, 139 Invalid, 887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [325 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:57:32,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2022-01-31 19:57:32,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 157. [2022-01-31 19:57:32,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 151 states have (on average 1.0132450331125828) internal successors, (153), 151 states have internal predecessors, (153), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:57:32,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2022-01-31 19:57:32,652 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 149 [2022-01-31 19:57:32,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:32,653 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2022-01-31 19:57:32,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.9591836734693877) internal successors, (145), 48 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:32,653 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2022-01-31 19:57:32,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-01-31 19:57:32,654 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:32,654 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:32,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-01-31 19:57:32,654 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:32,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:32,654 INFO L85 PathProgramCache]: Analyzing trace with hash 567899978, now seen corresponding path program 46 times [2022-01-31 19:57:32,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:32,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2119748107] [2022-01-31 19:57:32,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:32,659 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:32,659 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:57:32,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:32,668 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:32,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:33,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:33,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:33,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:33,652 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:33,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2119748107] [2022-01-31 19:57:33,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2119748107] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:33,652 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:33,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-01-31 19:57:33,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869738731] [2022-01-31 19:57:33,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:33,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 19:57:33,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:33,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 19:57:33,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 19:57:33,654 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand has 50 states, 50 states have (on average 2.96) internal successors, (148), 49 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 19:57:34,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:34,254 INFO L93 Difference]: Finished difference Result 409 states and 458 transitions. [2022-01-31 19:57:34,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 19:57:34,255 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.96) internal successors, (148), 49 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 152 [2022-01-31 19:57:34,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:34,257 INFO L225 Difference]: With dead ends: 409 [2022-01-31 19:57:34,257 INFO L226 Difference]: Without dead ends: 397 [2022-01-31 19:57:34,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1228, Invalid=1322, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 19:57:34,258 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 598 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 340 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 645 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 340 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:34,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [645 Valid, 146 Invalid, 892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [340 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:57:34,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2022-01-31 19:57:34,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 160. [2022-01-31 19:57:34,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 154 states have (on average 1.0129870129870129) internal successors, (156), 154 states have internal predecessors, (156), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:57:34,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 161 transitions. [2022-01-31 19:57:34,265 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 161 transitions. Word has length 152 [2022-01-31 19:57:34,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:34,265 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 161 transitions. [2022-01-31 19:57:34,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.96) internal successors, (148), 49 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 19:57:34,265 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 161 transitions. [2022-01-31 19:57:34,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-01-31 19:57:34,266 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:34,266 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:34,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-01-31 19:57:34,266 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:34,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:34,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1489640203, now seen corresponding path program 47 times [2022-01-31 19:57:34,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:34,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1314275831] [2022-01-31 19:57:34,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:34,270 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:34,270 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:57:34,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:34,277 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:34,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:35,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:35,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:35,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:35,194 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:35,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1314275831] [2022-01-31 19:57:35,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1314275831] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:35,194 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:35,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-01-31 19:57:35,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366778648] [2022-01-31 19:57:35,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:35,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-31 19:57:35,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:35,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-31 19:57:35,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 19:57:35,195 INFO L87 Difference]: Start difference. First operand 160 states and 161 transitions. Second operand has 51 states, 51 states have (on average 2.9607843137254903) internal successors, (151), 50 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:35,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:35,807 INFO L93 Difference]: Finished difference Result 417 states and 467 transitions. [2022-01-31 19:57:35,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-31 19:57:35,808 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.9607843137254903) internal successors, (151), 50 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 155 [2022-01-31 19:57:35,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:35,809 INFO L225 Difference]: With dead ends: 417 [2022-01-31 19:57:35,809 INFO L226 Difference]: Without dead ends: 405 [2022-01-31 19:57:35,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1278, Invalid=1374, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 19:57:35,810 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 504 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 275 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 552 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 275 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:35,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [552 Valid, 153 Invalid, 869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [275 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:57:35,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2022-01-31 19:57:35,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 163. [2022-01-31 19:57:35,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 157 states have (on average 1.0127388535031847) internal successors, (159), 157 states have internal predecessors, (159), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:57:35,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 164 transitions. [2022-01-31 19:57:35,816 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 164 transitions. Word has length 155 [2022-01-31 19:57:35,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:35,816 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 164 transitions. [2022-01-31 19:57:35,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.9607843137254903) internal successors, (151), 50 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:35,816 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 164 transitions. [2022-01-31 19:57:35,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-01-31 19:57:35,817 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:35,817 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:35,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-01-31 19:57:35,817 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:35,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:35,818 INFO L85 PathProgramCache]: Analyzing trace with hash 104076138, now seen corresponding path program 48 times [2022-01-31 19:57:35,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:35,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1493918855] [2022-01-31 19:57:35,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:35,821 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:35,821 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:57:35,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:35,828 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:35,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:36,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:36,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:36,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:36,764 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:36,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1493918855] [2022-01-31 19:57:36,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1493918855] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:36,765 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:36,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-01-31 19:57:36,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258275924] [2022-01-31 19:57:36,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:36,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-01-31 19:57:36,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:36,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-01-31 19:57:36,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 19:57:36,766 INFO L87 Difference]: Start difference. First operand 163 states and 164 transitions. Second operand has 52 states, 52 states have (on average 2.9615384615384617) internal successors, (154), 51 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 19:57:37,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:37,391 INFO L93 Difference]: Finished difference Result 425 states and 476 transitions. [2022-01-31 19:57:37,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-31 19:57:37,392 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.9615384615384617) internal successors, (154), 51 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 158 [2022-01-31 19:57:37,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:37,393 INFO L225 Difference]: With dead ends: 425 [2022-01-31 19:57:37,393 INFO L226 Difference]: Without dead ends: 413 [2022-01-31 19:57:37,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1329, Invalid=1427, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 19:57:37,394 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 512 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 278 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 278 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:37,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [561 Valid, 145 Invalid, 898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [278 Valid, 620 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:57:37,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2022-01-31 19:57:37,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 166. [2022-01-31 19:57:37,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 160 states have (on average 1.0125) internal successors, (162), 160 states have internal predecessors, (162), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:57:37,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 167 transitions. [2022-01-31 19:57:37,402 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 167 transitions. Word has length 158 [2022-01-31 19:57:37,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:37,402 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 167 transitions. [2022-01-31 19:57:37,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.9615384615384617) internal successors, (154), 51 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 19:57:37,402 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 167 transitions. [2022-01-31 19:57:37,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-01-31 19:57:37,403 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:37,403 INFO L514 BasicCegarLoop]: trace histogram [49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:37,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-01-31 19:57:37,403 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:37,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:37,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1939100885, now seen corresponding path program 49 times [2022-01-31 19:57:37,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:37,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1053624603] [2022-01-31 19:57:37,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:37,407 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:37,407 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:57:37,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:37,415 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:37,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:38,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:38,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:38,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:38,396 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:38,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1053624603] [2022-01-31 19:57:38,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1053624603] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:38,396 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:38,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-01-31 19:57:38,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431184504] [2022-01-31 19:57:38,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:38,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-31 19:57:38,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:38,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-31 19:57:38,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 19:57:38,398 INFO L87 Difference]: Start difference. First operand 166 states and 167 transitions. Second operand has 53 states, 53 states have (on average 2.9622641509433962) internal successors, (157), 52 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:39,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:39,023 INFO L93 Difference]: Finished difference Result 433 states and 485 transitions. [2022-01-31 19:57:39,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-31 19:57:39,024 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.9622641509433962) internal successors, (157), 52 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have 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 19:57:39,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:39,025 INFO L225 Difference]: With dead ends: 433 [2022-01-31 19:57:39,026 INFO L226 Difference]: Without dead ends: 421 [2022-01-31 19:57:39,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1381, Invalid=1481, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 19:57:39,027 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 592 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 332 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 642 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 332 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:39,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [642 Valid, 142 Invalid, 920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [332 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:57:39,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2022-01-31 19:57:39,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 169. [2022-01-31 19:57:39,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 163 states have (on average 1.0122699386503067) internal successors, (165), 163 states have internal predecessors, (165), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:57:39,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 170 transitions. [2022-01-31 19:57:39,035 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 170 transitions. Word has length 161 [2022-01-31 19:57:39,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:39,035 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 170 transitions. [2022-01-31 19:57:39,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.9622641509433962) internal successors, (157), 52 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:39,035 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 170 transitions. [2022-01-31 19:57:39,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-01-31 19:57:39,036 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:39,036 INFO L514 BasicCegarLoop]: trace histogram [50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:39,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-01-31 19:57:39,036 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:39,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:39,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1477372022, now seen corresponding path program 50 times [2022-01-31 19:57:39,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:39,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1777881066] [2022-01-31 19:57:39,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:39,040 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:39,040 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:57:39,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:39,048 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:39,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:40,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:40,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:40,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:40,082 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:40,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1777881066] [2022-01-31 19:57:40,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1777881066] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:40,082 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:40,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-01-31 19:57:40,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803031541] [2022-01-31 19:57:40,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:40,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-01-31 19:57:40,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:40,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-01-31 19:57:40,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 19:57:40,084 INFO L87 Difference]: Start difference. First operand 169 states and 170 transitions. Second operand has 54 states, 54 states have (on average 2.962962962962963) internal successors, (160), 53 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 19:57:40,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:40,741 INFO L93 Difference]: Finished difference Result 441 states and 494 transitions. [2022-01-31 19:57:40,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-31 19:57:40,742 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.962962962962963) internal successors, (160), 53 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 164 [2022-01-31 19:57:40,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:40,743 INFO L225 Difference]: With dead ends: 441 [2022-01-31 19:57:40,743 INFO L226 Difference]: Without dead ends: 429 [2022-01-31 19:57:40,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1434, Invalid=1536, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 19:57:40,744 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 696 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 400 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 747 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 400 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:40,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [747 Valid, 134 Invalid, 988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [400 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:57:40,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2022-01-31 19:57:40,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 172. [2022-01-31 19:57:40,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 166 states have (on average 1.0120481927710843) internal successors, (168), 166 states have internal predecessors, (168), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:57:40,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 173 transitions. [2022-01-31 19:57:40,751 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 173 transitions. Word has length 164 [2022-01-31 19:57:40,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:40,751 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 173 transitions. [2022-01-31 19:57:40,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.962962962962963) internal successors, (160), 53 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 19:57:40,751 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 173 transitions. [2022-01-31 19:57:40,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-01-31 19:57:40,754 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:40,754 INFO L514 BasicCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:40,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-01-31 19:57:40,755 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:40,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:40,755 INFO L85 PathProgramCache]: Analyzing trace with hash 513236149, now seen corresponding path program 51 times [2022-01-31 19:57:40,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:40,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2044791515] [2022-01-31 19:57:40,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:40,758 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:40,759 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:57:40,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:40,767 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:40,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:41,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:41,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:41,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:41,834 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:41,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2044791515] [2022-01-31 19:57:41,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2044791515] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:41,835 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:41,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-01-31 19:57:41,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109512781] [2022-01-31 19:57:41,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:41,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-01-31 19:57:41,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:41,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-01-31 19:57:41,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 19:57:41,836 INFO L87 Difference]: Start difference. First operand 172 states and 173 transitions. Second operand has 55 states, 55 states have (on average 2.963636363636364) internal successors, (163), 54 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:42,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:42,531 INFO L93 Difference]: Finished difference Result 449 states and 503 transitions. [2022-01-31 19:57:42,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-31 19:57:42,532 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.963636363636364) internal successors, (163), 54 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have 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 19:57:42,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:42,533 INFO L225 Difference]: With dead ends: 449 [2022-01-31 19:57:42,533 INFO L226 Difference]: Without dead ends: 437 [2022-01-31 19:57:42,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1488, Invalid=1592, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 19:57:42,535 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 848 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 498 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 900 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 1087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 498 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:42,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [900 Valid, 136 Invalid, 1087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [498 Valid, 589 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:57:42,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2022-01-31 19:57:42,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 175. [2022-01-31 19:57:42,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 169 states have (on average 1.0118343195266273) internal successors, (171), 169 states have internal predecessors, (171), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:57:42,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 176 transitions. [2022-01-31 19:57:42,541 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 176 transitions. Word has length 167 [2022-01-31 19:57:42,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:42,541 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 176 transitions. [2022-01-31 19:57:42,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.963636363636364) internal successors, (163), 54 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:42,541 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 176 transitions. [2022-01-31 19:57:42,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-01-31 19:57:42,542 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:42,542 INFO L514 BasicCegarLoop]: trace histogram [52, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:42,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-01-31 19:57:42,542 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:42,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:42,542 INFO L85 PathProgramCache]: Analyzing trace with hash 2107802538, now seen corresponding path program 52 times [2022-01-31 19:57:42,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:42,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [526087976] [2022-01-31 19:57:42,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:42,548 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:42,548 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:57:42,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:42,558 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:42,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:43,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:43,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:43,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:43,636 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:43,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [526087976] [2022-01-31 19:57:43,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [526087976] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:43,636 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:43,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-01-31 19:57:43,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607524902] [2022-01-31 19:57:43,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:43,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-31 19:57:43,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:43,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-31 19:57:43,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 19:57:43,638 INFO L87 Difference]: Start difference. First operand 175 states and 176 transitions. Second operand has 56 states, 56 states have (on average 2.9642857142857144) internal successors, (166), 55 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 19:57:44,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:44,357 INFO L93 Difference]: Finished difference Result 457 states and 512 transitions. [2022-01-31 19:57:44,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 19:57:44,357 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.9642857142857144) internal successors, (166), 55 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 170 [2022-01-31 19:57:44,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:44,359 INFO L225 Difference]: With dead ends: 457 [2022-01-31 19:57:44,359 INFO L226 Difference]: Without dead ends: 445 [2022-01-31 19:57:44,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1543, Invalid=1649, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 19:57:44,360 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 580 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 318 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 633 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 318 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:44,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [633 Valid, 148 Invalid, 998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 680 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:57:44,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2022-01-31 19:57:44,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 178. [2022-01-31 19:57:44,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 172 states have (on average 1.0116279069767442) internal successors, (174), 172 states have internal predecessors, (174), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:57:44,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 179 transitions. [2022-01-31 19:57:44,367 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 179 transitions. Word has length 170 [2022-01-31 19:57:44,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:44,367 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 179 transitions. [2022-01-31 19:57:44,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.9642857142857144) internal successors, (166), 55 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 19:57:44,367 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 179 transitions. [2022-01-31 19:57:44,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-01-31 19:57:44,368 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:44,368 INFO L514 BasicCegarLoop]: trace histogram [53, 53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:44,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-01-31 19:57:44,368 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:44,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:44,368 INFO L85 PathProgramCache]: Analyzing trace with hash -798163819, now seen corresponding path program 53 times [2022-01-31 19:57:44,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:44,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [821880256] [2022-01-31 19:57:44,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:44,371 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:44,371 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:57:44,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:44,379 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:44,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:45,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:45,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:45,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:45,476 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:45,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [821880256] [2022-01-31 19:57:45,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [821880256] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:45,476 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:45,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-01-31 19:57:45,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568587406] [2022-01-31 19:57:45,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:45,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-01-31 19:57:45,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:45,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-01-31 19:57:45,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 19:57:45,479 INFO L87 Difference]: Start difference. First operand 178 states and 179 transitions. Second operand has 57 states, 57 states have (on average 2.9649122807017543) internal successors, (169), 56 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:46,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:46,246 INFO L93 Difference]: Finished difference Result 465 states and 521 transitions. [2022-01-31 19:57:46,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-31 19:57:46,246 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.9649122807017543) internal successors, (169), 56 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have 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 19:57:46,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:46,248 INFO L225 Difference]: With dead ends: 465 [2022-01-31 19:57:46,248 INFO L226 Difference]: Without dead ends: 453 [2022-01-31 19:57:46,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1599, Invalid=1707, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 19:57:46,248 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 912 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 539 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 966 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 1176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 539 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:46,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [966 Valid, 135 Invalid, 1176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [539 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:57:46,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2022-01-31 19:57:46,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 181. [2022-01-31 19:57:46,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 175 states have (on average 1.0114285714285713) internal successors, (177), 175 states have internal predecessors, (177), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:57:46,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 182 transitions. [2022-01-31 19:57:46,255 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 182 transitions. Word has length 173 [2022-01-31 19:57:46,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:46,255 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 182 transitions. [2022-01-31 19:57:46,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.9649122807017543) internal successors, (169), 56 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:46,256 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 182 transitions. [2022-01-31 19:57:46,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-01-31 19:57:46,256 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:46,256 INFO L514 BasicCegarLoop]: trace histogram [54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:46,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-01-31 19:57:46,257 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:46,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:46,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1213880266, now seen corresponding path program 54 times [2022-01-31 19:57:46,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:46,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [788722774] [2022-01-31 19:57:46,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:46,260 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:46,260 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:57:46,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:46,269 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:46,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:47,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:47,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:47,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:47,439 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:47,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [788722774] [2022-01-31 19:57:47,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [788722774] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:47,439 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:47,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-01-31 19:57:47,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558762406] [2022-01-31 19:57:47,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:47,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-01-31 19:57:47,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:47,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-01-31 19:57:47,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 19:57:47,441 INFO L87 Difference]: Start difference. First operand 181 states and 182 transitions. Second operand has 58 states, 58 states have (on average 2.9655172413793105) internal successors, (172), 57 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 19:57:48,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:48,186 INFO L93 Difference]: Finished difference Result 473 states and 530 transitions. [2022-01-31 19:57:48,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-31 19:57:48,187 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.9655172413793105) internal successors, (172), 57 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 176 [2022-01-31 19:57:48,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:48,189 INFO L225 Difference]: With dead ends: 473 [2022-01-31 19:57:48,189 INFO L226 Difference]: Without dead ends: 461 [2022-01-31 19:57:48,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1656, Invalid=1766, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 19:57:48,191 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 890 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 522 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 945 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 1140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 522 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:48,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [945 Valid, 152 Invalid, 1140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [522 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:57:48,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2022-01-31 19:57:48,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 184. [2022-01-31 19:57:48,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 178 states have (on average 1.0112359550561798) internal successors, (180), 178 states have internal predecessors, (180), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:57:48,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 185 transitions. [2022-01-31 19:57:48,199 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 185 transitions. Word has length 176 [2022-01-31 19:57:48,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:48,199 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 185 transitions. [2022-01-31 19:57:48,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.9655172413793105) internal successors, (172), 57 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 19:57:48,199 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 185 transitions. [2022-01-31 19:57:48,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-01-31 19:57:48,200 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:48,200 INFO L514 BasicCegarLoop]: trace histogram [55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:48,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-01-31 19:57:48,200 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:48,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:48,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1455633525, now seen corresponding path program 55 times [2022-01-31 19:57:48,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:48,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2076119029] [2022-01-31 19:57:48,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:48,203 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:48,204 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:57:48,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:48,214 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:48,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:49,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:49,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:49,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:49,431 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:49,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2076119029] [2022-01-31 19:57:49,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2076119029] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:49,432 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:49,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-01-31 19:57:49,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859210192] [2022-01-31 19:57:49,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:49,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-01-31 19:57:49,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:49,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-01-31 19:57:49,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 19:57:49,434 INFO L87 Difference]: Start difference. First operand 184 states and 185 transitions. Second operand has 59 states, 59 states have (on average 2.9661016949152543) internal successors, (175), 58 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:50,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:50,136 INFO L93 Difference]: Finished difference Result 481 states and 539 transitions. [2022-01-31 19:57:50,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-31 19:57:50,136 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.9661016949152543) internal successors, (175), 58 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have 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 19:57:50,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:50,138 INFO L225 Difference]: With dead ends: 481 [2022-01-31 19:57:50,138 INFO L226 Difference]: Without dead ends: 469 [2022-01-31 19:57:50,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1714, Invalid=1826, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 19:57:50,139 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 646 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 359 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 702 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 1036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 359 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:50,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [702 Valid, 164 Invalid, 1036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [359 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:57:50,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2022-01-31 19:57:50,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 187. [2022-01-31 19:57:50,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 181 states have (on average 1.011049723756906) internal successors, (183), 181 states have internal predecessors, (183), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:57:50,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 188 transitions. [2022-01-31 19:57:50,146 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 188 transitions. Word has length 179 [2022-01-31 19:57:50,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:50,146 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 188 transitions. [2022-01-31 19:57:50,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.9661016949152543) internal successors, (175), 58 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:50,147 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 188 transitions. [2022-01-31 19:57:50,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-01-31 19:57:50,147 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:50,147 INFO L514 BasicCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:50,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-01-31 19:57:50,148 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:50,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:50,148 INFO L85 PathProgramCache]: Analyzing trace with hash 866817002, now seen corresponding path program 56 times [2022-01-31 19:57:50,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:50,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2129789068] [2022-01-31 19:57:50,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:50,151 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:50,151 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:57:50,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:50,161 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:50,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:51,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:51,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:51,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:51,438 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:51,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2129789068] [2022-01-31 19:57:51,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2129789068] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:51,438 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:51,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-01-31 19:57:51,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032357212] [2022-01-31 19:57:51,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:51,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-01-31 19:57:51,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:51,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-01-31 19:57:51,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 19:57:51,440 INFO L87 Difference]: Start difference. First operand 187 states and 188 transitions. Second operand has 60 states, 60 states have (on average 2.966666666666667) internal successors, (178), 59 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 19:57:52,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:52,176 INFO L93 Difference]: Finished difference Result 489 states and 548 transitions. [2022-01-31 19:57:52,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-31 19:57:52,176 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.966666666666667) internal successors, (178), 59 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 182 [2022-01-31 19:57:52,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:52,178 INFO L225 Difference]: With dead ends: 489 [2022-01-31 19:57:52,178 INFO L226 Difference]: Without dead ends: 477 [2022-01-31 19:57:52,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1773, Invalid=1887, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 19:57:52,178 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 777 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 446 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 834 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 1104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 446 IncrementalHoareTripleChecker+Valid, 658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:52,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [834 Valid, 146 Invalid, 1104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [446 Valid, 658 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:57:52,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2022-01-31 19:57:52,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 190. [2022-01-31 19:57:52,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 184 states have (on average 1.0108695652173914) internal successors, (186), 184 states have internal predecessors, (186), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:57:52,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 191 transitions. [2022-01-31 19:57:52,184 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 191 transitions. Word has length 182 [2022-01-31 19:57:52,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:52,185 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 191 transitions. [2022-01-31 19:57:52,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.966666666666667) internal successors, (178), 59 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 19:57:52,185 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 191 transitions. [2022-01-31 19:57:52,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-01-31 19:57:52,185 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:52,185 INFO L514 BasicCegarLoop]: trace histogram [57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:52,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-01-31 19:57:52,186 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:52,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:52,186 INFO L85 PathProgramCache]: Analyzing trace with hash 80217173, now seen corresponding path program 57 times [2022-01-31 19:57:52,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:52,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1218688059] [2022-01-31 19:57:52,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:52,191 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:52,191 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:57:52,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:52,199 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:52,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:53,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:53,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:53,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:53,484 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:53,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1218688059] [2022-01-31 19:57:53,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1218688059] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:53,484 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:53,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-01-31 19:57:53,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063656887] [2022-01-31 19:57:53,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:53,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-01-31 19:57:53,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:53,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-01-31 19:57:53,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 19:57:53,486 INFO L87 Difference]: Start difference. First operand 190 states and 191 transitions. Second operand has 61 states, 61 states have (on average 2.9672131147540983) internal successors, (181), 60 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:54,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:54,252 INFO L93 Difference]: Finished difference Result 497 states and 557 transitions. [2022-01-31 19:57:54,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-31 19:57:54,252 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.9672131147540983) internal successors, (181), 60 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have 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 19:57:54,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:54,254 INFO L225 Difference]: With dead ends: 497 [2022-01-31 19:57:54,255 INFO L226 Difference]: Without dead ends: 485 [2022-01-31 19:57:54,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1833, Invalid=1949, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 19:57:54,256 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 638 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 352 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 696 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 1037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 352 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:54,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [696 Valid, 173 Invalid, 1037 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [352 Valid, 685 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:57:54,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2022-01-31 19:57:54,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 193. [2022-01-31 19:57:54,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 187 states have (on average 1.0106951871657754) internal successors, (189), 187 states have internal predecessors, (189), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:57:54,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 194 transitions. [2022-01-31 19:57:54,264 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 194 transitions. Word has length 185 [2022-01-31 19:57:54,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:54,264 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 194 transitions. [2022-01-31 19:57:54,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.9672131147540983) internal successors, (181), 60 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:54,264 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 194 transitions. [2022-01-31 19:57:54,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-01-31 19:57:54,265 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:54,265 INFO L514 BasicCegarLoop]: trace histogram [58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:54,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-01-31 19:57:54,265 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:54,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:54,266 INFO L85 PathProgramCache]: Analyzing trace with hash -173721590, now seen corresponding path program 58 times [2022-01-31 19:57:54,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:54,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [724067337] [2022-01-31 19:57:54,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:54,268 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:54,269 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:57:54,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:54,279 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:54,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:55,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:55,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:55,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:55,585 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:55,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [724067337] [2022-01-31 19:57:55,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [724067337] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:55,585 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:55,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-01-31 19:57:55,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436133511] [2022-01-31 19:57:55,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:55,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-01-31 19:57:55,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:55,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-01-31 19:57:55,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 19:57:55,587 INFO L87 Difference]: Start difference. First operand 193 states and 194 transitions. Second operand has 62 states, 62 states have (on average 2.967741935483871) internal successors, (184), 61 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 19:57:56,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:56,384 INFO L93 Difference]: Finished difference Result 505 states and 566 transitions. [2022-01-31 19:57:56,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-31 19:57:56,384 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.967741935483871) internal successors, (184), 61 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 188 [2022-01-31 19:57:56,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:56,386 INFO L225 Difference]: With dead ends: 505 [2022-01-31 19:57:56,387 INFO L226 Difference]: Without dead ends: 493 [2022-01-31 19:57:56,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1894, Invalid=2012, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 19:57:56,388 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 628 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 341 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 687 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 1069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 341 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:56,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [687 Valid, 165 Invalid, 1069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [341 Valid, 728 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:57:56,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2022-01-31 19:57:56,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 196. [2022-01-31 19:57:56,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 190 states have (on average 1.0105263157894737) internal successors, (192), 190 states have internal predecessors, (192), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:57:56,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 197 transitions. [2022-01-31 19:57:56,396 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 197 transitions. Word has length 188 [2022-01-31 19:57:56,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:56,396 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 197 transitions. [2022-01-31 19:57:56,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.967741935483871) internal successors, (184), 61 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 19:57:56,396 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 197 transitions. [2022-01-31 19:57:56,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-01-31 19:57:56,397 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:56,397 INFO L514 BasicCegarLoop]: trace histogram [59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:56,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-01-31 19:57:56,397 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:56,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:56,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1826001867, now seen corresponding path program 59 times [2022-01-31 19:57:56,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:56,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1145110581] [2022-01-31 19:57:56,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:56,403 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:56,403 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:57:56,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:56,414 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:56,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:57,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:57,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:57,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:57,826 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:57,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1145110581] [2022-01-31 19:57:57,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1145110581] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:57,827 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:57,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-01-31 19:57:57,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846851111] [2022-01-31 19:57:57,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:57,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-01-31 19:57:57,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:57,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-01-31 19:57:57,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 19:57:57,829 INFO L87 Difference]: Start difference. First operand 196 states and 197 transitions. Second operand has 63 states, 63 states have (on average 2.9682539682539684) internal successors, (187), 62 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:58,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:58,705 INFO L93 Difference]: Finished difference Result 513 states and 575 transitions. [2022-01-31 19:57:58,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-31 19:57:58,705 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.9682539682539684) internal successors, (187), 62 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have 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 19:57:58,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:58,707 INFO L225 Difference]: With dead ends: 513 [2022-01-31 19:57:58,707 INFO L226 Difference]: Without dead ends: 501 [2022-01-31 19:57:58,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1956, Invalid=2076, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 19:57:58,708 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 903 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 523 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 963 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 1236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 523 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:58,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [963 Valid, 162 Invalid, 1236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [523 Valid, 713 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 19:57:58,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2022-01-31 19:57:58,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 199. [2022-01-31 19:57:58,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 193 states have (on average 1.0103626943005182) internal successors, (195), 193 states have internal predecessors, (195), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:57:58,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 200 transitions. [2022-01-31 19:57:58,759 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 200 transitions. Word has length 191 [2022-01-31 19:57:58,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:58,760 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 200 transitions. [2022-01-31 19:57:58,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.9682539682539684) internal successors, (187), 62 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:58,760 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 200 transitions. [2022-01-31 19:57:58,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-01-31 19:57:58,761 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:58,761 INFO L514 BasicCegarLoop]: trace histogram [60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:58,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-01-31 19:57:58,761 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:58,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:58,762 INFO L85 PathProgramCache]: Analyzing trace with hash -287554518, now seen corresponding path program 60 times [2022-01-31 19:57:58,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:58,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1422849728] [2022-01-31 19:57:58,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:58,765 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:58,765 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:57:58,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:58,776 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:58,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:00,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:58:00,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:00,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:58:00,170 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:58:00,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1422849728] [2022-01-31 19:58:00,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1422849728] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:58:00,170 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:58:00,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-01-31 19:58:00,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964302672] [2022-01-31 19:58:00,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:58:00,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-01-31 19:58:00,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:58:00,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-01-31 19:58:00,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 19:58:00,172 INFO L87 Difference]: Start difference. First operand 199 states and 200 transitions. Second operand has 64 states, 64 states have (on average 2.96875) internal successors, (190), 63 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 19:58:00,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:58:00,983 INFO L93 Difference]: Finished difference Result 521 states and 584 transitions. [2022-01-31 19:58:00,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-31 19:58:00,984 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.96875) internal successors, (190), 63 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 194 [2022-01-31 19:58:00,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:58:00,985 INFO L225 Difference]: With dead ends: 521 [2022-01-31 19:58:00,985 INFO L226 Difference]: Without dead ends: 509 [2022-01-31 19:58:00,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2019, Invalid=2141, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 19:58:00,986 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 872 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 505 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 933 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 1163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 505 IncrementalHoareTripleChecker+Valid, 658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:58:00,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [933 Valid, 149 Invalid, 1163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [505 Valid, 658 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:58:00,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2022-01-31 19:58:00,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 202. [2022-01-31 19:58:00,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 196 states have (on average 1.010204081632653) internal successors, (198), 196 states have internal predecessors, (198), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:58:00,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 203 transitions. [2022-01-31 19:58:00,999 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 203 transitions. Word has length 194 [2022-01-31 19:58:00,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:58:00,999 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 203 transitions. [2022-01-31 19:58:00,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.96875) internal successors, (190), 63 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 19:58:00,999 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 203 transitions. [2022-01-31 19:58:01,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-01-31 19:58:01,000 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:58:01,000 INFO L514 BasicCegarLoop]: trace histogram [61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:58:01,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-01-31 19:58:01,000 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:58:01,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:58:01,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1403925, now seen corresponding path program 61 times [2022-01-31 19:58:01,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:58:01,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [207109328] [2022-01-31 19:58:01,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:58:01,003 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:58:01,003 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:58:01,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:58:01,015 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:58:01,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:02,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:58:02,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:02,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:58:02,412 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:58:02,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [207109328] [2022-01-31 19:58:02,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [207109328] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:58:02,412 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:58:02,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-01-31 19:58:02,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139109397] [2022-01-31 19:58:02,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:58:02,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-01-31 19:58:02,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:58:02,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-01-31 19:58:02,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 19:58:02,414 INFO L87 Difference]: Start difference. First operand 202 states and 203 transitions. Second operand has 65 states, 65 states have (on average 2.9692307692307693) internal successors, (193), 64 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:03,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:58:03,257 INFO L93 Difference]: Finished difference Result 529 states and 593 transitions. [2022-01-31 19:58:03,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-31 19:58:03,257 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.9692307692307693) internal successors, (193), 64 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have 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 19:58:03,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:58:03,259 INFO L225 Difference]: With dead ends: 529 [2022-01-31 19:58:03,259 INFO L226 Difference]: Without dead ends: 517 [2022-01-31 19:58:03,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2083, Invalid=2207, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 19:58:03,260 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 925 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 537 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 987 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 1208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 537 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:58:03,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [987 Valid, 161 Invalid, 1208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [537 Valid, 671 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:58:03,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2022-01-31 19:58:03,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 205. [2022-01-31 19:58:03,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 199 states have (on average 1.0100502512562815) internal successors, (201), 199 states have internal predecessors, (201), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:58:03,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 206 transitions. [2022-01-31 19:58:03,268 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 206 transitions. Word has length 197 [2022-01-31 19:58:03,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:58:03,269 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 206 transitions. [2022-01-31 19:58:03,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.9692307692307693) internal successors, (193), 64 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:03,269 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 206 transitions. [2022-01-31 19:58:03,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2022-01-31 19:58:03,270 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:58:03,270 INFO L514 BasicCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:58:03,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-01-31 19:58:03,270 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:58:03,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:58:03,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1247918154, now seen corresponding path program 62 times [2022-01-31 19:58:03,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:58:03,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1890550274] [2022-01-31 19:58:03,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:58:03,280 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:58:03,280 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:58:03,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:58:03,292 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:58:03,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:04,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:58:04,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:04,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:58:04,725 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:58:04,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1890550274] [2022-01-31 19:58:04,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1890550274] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:58:04,725 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:58:04,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-01-31 19:58:04,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314001473] [2022-01-31 19:58:04,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:58:04,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-01-31 19:58:04,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:58:04,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-01-31 19:58:04,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 19:58:04,727 INFO L87 Difference]: Start difference. First operand 205 states and 206 transitions. Second operand has 66 states, 66 states have (on average 2.9696969696969697) internal successors, (196), 65 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 19:58:05,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:58:05,636 INFO L93 Difference]: Finished difference Result 537 states and 602 transitions. [2022-01-31 19:58:05,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-31 19:58:05,636 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.9696969696969697) internal successors, (196), 65 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 200 [2022-01-31 19:58:05,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:58:05,638 INFO L225 Difference]: With dead ends: 537 [2022-01-31 19:58:05,638 INFO L226 Difference]: Without dead ends: 525 [2022-01-31 19:58:05,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2148, Invalid=2274, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 19:58:05,639 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 921 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 746 mSolverCounterSat, 534 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 984 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 1280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 534 IncrementalHoareTripleChecker+Valid, 746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:58:05,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [984 Valid, 163 Invalid, 1280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [534 Valid, 746 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:58:05,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2022-01-31 19:58:05,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 208. [2022-01-31 19:58:05,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 202 states have (on average 1.00990099009901) internal successors, (204), 202 states have internal predecessors, (204), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:58:05,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 209 transitions. [2022-01-31 19:58:05,648 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 209 transitions. Word has length 200 [2022-01-31 19:58:05,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:58:05,648 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 209 transitions. [2022-01-31 19:58:05,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.9696969696969697) internal successors, (196), 65 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 19:58:05,648 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 209 transitions. [2022-01-31 19:58:05,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-01-31 19:58:05,649 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:58:05,649 INFO L514 BasicCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:58:05,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-01-31 19:58:05,649 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:58:05,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:58:05,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1866073077, now seen corresponding path program 63 times [2022-01-31 19:58:05,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:58:05,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1523962712] [2022-01-31 19:58:05,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:58:05,656 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:58:05,656 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:58:05,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:58:05,669 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:58:05,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:07,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:58:07,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:07,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:58:07,182 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:58:07,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1523962712] [2022-01-31 19:58:07,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1523962712] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:58:07,182 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:58:07,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-01-31 19:58:07,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201377675] [2022-01-31 19:58:07,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:58:07,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-01-31 19:58:07,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:58:07,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-01-31 19:58:07,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 19:58:07,184 INFO L87 Difference]: Start difference. First operand 208 states and 209 transitions. Second operand has 67 states, 67 states have (on average 2.970149253731343) internal successors, (199), 66 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:08,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:58:08,109 INFO L93 Difference]: Finished difference Result 545 states and 611 transitions. [2022-01-31 19:58:08,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-31 19:58:08,109 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.970149253731343) internal successors, (199), 66 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have 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 19:58:08,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:58:08,111 INFO L225 Difference]: With dead ends: 545 [2022-01-31 19:58:08,111 INFO L226 Difference]: Without dead ends: 533 [2022-01-31 19:58:08,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2214, Invalid=2342, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 19:58:08,112 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 1067 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 634 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1131 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 1307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 634 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:58:08,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1131 Valid, 160 Invalid, 1307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [634 Valid, 673 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 19:58:08,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2022-01-31 19:58:08,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 211. [2022-01-31 19:58:08,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 205 states have (on average 1.0097560975609756) internal successors, (207), 205 states have internal predecessors, (207), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:58:08,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 212 transitions. [2022-01-31 19:58:08,119 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 212 transitions. Word has length 203 [2022-01-31 19:58:08,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:58:08,119 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 212 transitions. [2022-01-31 19:58:08,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.970149253731343) internal successors, (199), 66 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:08,119 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 212 transitions. [2022-01-31 19:58:08,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2022-01-31 19:58:08,120 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:58:08,120 INFO L514 BasicCegarLoop]: trace histogram [64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:58:08,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-01-31 19:58:08,120 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:58:08,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:58:08,120 INFO L85 PathProgramCache]: Analyzing trace with hash 499618922, now seen corresponding path program 64 times [2022-01-31 19:58:08,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:58:08,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [915438592] [2022-01-31 19:58:08,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:58:08,122 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:58:08,122 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:58:08,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:58:08,137 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:58:08,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:09,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:58:09,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:09,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:58:09,649 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:58:09,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [915438592] [2022-01-31 19:58:09,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [915438592] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:58:09,649 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:58:09,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-01-31 19:58:09,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135302611] [2022-01-31 19:58:09,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:58:09,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-01-31 19:58:09,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:58:09,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-01-31 19:58:09,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 19:58:09,652 INFO L87 Difference]: Start difference. First operand 211 states and 212 transitions. Second operand has 68 states, 68 states have (on average 2.9705882352941178) internal successors, (202), 67 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 19:58:10,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:58:10,592 INFO L93 Difference]: Finished difference Result 553 states and 620 transitions. [2022-01-31 19:58:10,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-31 19:58:10,593 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.9705882352941178) internal successors, (202), 67 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 206 [2022-01-31 19:58:10,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:58:10,594 INFO L225 Difference]: With dead ends: 553 [2022-01-31 19:58:10,594 INFO L226 Difference]: Without dead ends: 541 [2022-01-31 19:58:10,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2281, Invalid=2411, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 19:58:10,595 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 856 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 487 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 921 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 1201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 487 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:58:10,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [921 Valid, 162 Invalid, 1201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [487 Valid, 714 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 19:58:10,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2022-01-31 19:58:10,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 214. [2022-01-31 19:58:10,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 208 states have (on average 1.0096153846153846) internal successors, (210), 208 states have internal predecessors, (210), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:58:10,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 215 transitions. [2022-01-31 19:58:10,604 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 215 transitions. Word has length 206 [2022-01-31 19:58:10,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:58:10,604 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 215 transitions. [2022-01-31 19:58:10,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.9705882352941178) internal successors, (202), 67 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 19:58:10,604 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 215 transitions. [2022-01-31 19:58:10,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-01-31 19:58:10,605 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:58:10,605 INFO L514 BasicCegarLoop]: trace histogram [65, 65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:58:10,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-01-31 19:58:10,605 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:58:10,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:58:10,606 INFO L85 PathProgramCache]: Analyzing trace with hash 163918805, now seen corresponding path program 65 times [2022-01-31 19:58:10,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:58:10,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1728606583] [2022-01-31 19:58:10,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:58:10,628 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:58:10,628 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:58:10,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:58:10,643 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:58:10,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:12,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:58:12,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:12,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:58:12,254 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:58:12,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1728606583] [2022-01-31 19:58:12,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1728606583] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:58:12,254 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:58:12,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-01-31 19:58:12,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467913987] [2022-01-31 19:58:12,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:58:12,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-01-31 19:58:12,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:58:12,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-01-31 19:58:12,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 19:58:12,258 INFO L87 Difference]: Start difference. First operand 214 states and 215 transitions. Second operand has 69 states, 69 states have (on average 2.971014492753623) internal successors, (205), 68 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:13,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:58:13,361 INFO L93 Difference]: Finished difference Result 561 states and 629 transitions. [2022-01-31 19:58:13,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-31 19:58:13,362 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.971014492753623) internal successors, (205), 68 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have 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 19:58:13,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:58:13,364 INFO L225 Difference]: With dead ends: 561 [2022-01-31 19:58:13,364 INFO L226 Difference]: Without dead ends: 549 [2022-01-31 19:58:13,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2349, Invalid=2481, Unknown=0, NotChecked=0, Total=4830 [2022-01-31 19:58:13,366 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 846 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 479 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 912 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 1218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 479 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:58:13,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [912 Valid, 169 Invalid, 1218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [479 Valid, 739 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 19:58:13,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2022-01-31 19:58:13,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 217. [2022-01-31 19:58:13,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 211 states have (on average 1.009478672985782) internal successors, (213), 211 states have internal predecessors, (213), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:58:13,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 218 transitions. [2022-01-31 19:58:13,376 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 218 transitions. Word has length 209 [2022-01-31 19:58:13,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:58:13,376 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 218 transitions. [2022-01-31 19:58:13,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.971014492753623) internal successors, (205), 68 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:13,376 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 218 transitions. [2022-01-31 19:58:13,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2022-01-31 19:58:13,377 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:58:13,377 INFO L514 BasicCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:58:13,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-01-31 19:58:13,377 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:58:13,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:58:13,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1994401654, now seen corresponding path program 66 times [2022-01-31 19:58:13,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:58:13,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1857635848] [2022-01-31 19:58:13,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:58:13,380 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:58:13,380 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:58:13,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:58:13,393 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:58:13,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:15,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:58:15,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:15,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:58:15,121 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:58:15,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1857635848] [2022-01-31 19:58:15,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1857635848] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:58:15,121 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:58:15,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-01-31 19:58:15,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654621358] [2022-01-31 19:58:15,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:58:15,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-01-31 19:58:15,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:58:15,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-01-31 19:58:15,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2022-01-31 19:58:15,123 INFO L87 Difference]: Start difference. First operand 217 states and 218 transitions. Second operand has 70 states, 70 states have (on average 2.9714285714285715) internal successors, (208), 69 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 19:58:16,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:58:16,175 INFO L93 Difference]: Finished difference Result 569 states and 638 transitions. [2022-01-31 19:58:16,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-31 19:58:16,176 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.9714285714285715) internal successors, (208), 69 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 212 [2022-01-31 19:58:16,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:58:16,177 INFO L225 Difference]: With dead ends: 569 [2022-01-31 19:58:16,178 INFO L226 Difference]: Without dead ends: 557 [2022-01-31 19:58:16,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2418, Invalid=2552, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 19:58:16,178 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 896 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 760 mSolverCounterSat, 513 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 963 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 1273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 513 IncrementalHoareTripleChecker+Valid, 760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:58:16,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [963 Valid, 166 Invalid, 1273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [513 Valid, 760 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 19:58:16,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2022-01-31 19:58:16,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 220. [2022-01-31 19:58:16,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 214 states have (on average 1.0093457943925233) internal successors, (216), 214 states have internal predecessors, (216), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:58:16,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 221 transitions. [2022-01-31 19:58:16,187 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 221 transitions. Word has length 212 [2022-01-31 19:58:16,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:58:16,187 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 221 transitions. [2022-01-31 19:58:16,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.9714285714285715) internal successors, (208), 69 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 19:58:16,188 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 221 transitions. [2022-01-31 19:58:16,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-01-31 19:58:16,189 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:58:16,189 INFO L514 BasicCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:58:16,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-01-31 19:58:16,189 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:58:16,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:58:16,189 INFO L85 PathProgramCache]: Analyzing trace with hash -563807307, now seen corresponding path program 67 times [2022-01-31 19:58:16,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:58:16,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1358510296] [2022-01-31 19:58:16,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:58:16,192 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:58:16,192 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:58:16,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:58:16,207 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:58:16,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:17,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:58:17,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:17,872 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 19:58:17,872 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:58:17,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1358510296] [2022-01-31 19:58:17,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1358510296] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:58:17,872 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:58:17,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-01-31 19:58:17,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888154624] [2022-01-31 19:58:17,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:58:17,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-01-31 19:58:17,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:58:17,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-01-31 19:58:17,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 19:58:17,875 INFO L87 Difference]: Start difference. First operand 220 states and 221 transitions. Second operand has 71 states, 71 states have (on average 2.971830985915493) internal successors, (211), 70 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:18,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:58:18,837 INFO L93 Difference]: Finished difference Result 577 states and 647 transitions. [2022-01-31 19:58:18,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-31 19:58:18,837 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.971830985915493) internal successors, (211), 70 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have 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 19:58:18,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:58:18,839 INFO L225 Difference]: With dead ends: 577 [2022-01-31 19:58:18,839 INFO L226 Difference]: Without dead ends: 565 [2022-01-31 19:58:18,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2488, Invalid=2624, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 19:58:18,840 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 862 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 765 mSolverCounterSat, 487 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 930 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 1252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 487 IncrementalHoareTripleChecker+Valid, 765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:58:18,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [930 Valid, 178 Invalid, 1252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [487 Valid, 765 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:58:18,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2022-01-31 19:58:18,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 223. [2022-01-31 19:58:18,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 217 states have (on average 1.0092165898617511) internal successors, (219), 217 states have internal predecessors, (219), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:58:18,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 224 transitions. [2022-01-31 19:58:18,849 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 224 transitions. Word has length 215 [2022-01-31 19:58:18,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:58:18,849 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 224 transitions. [2022-01-31 19:58:18,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.971830985915493) internal successors, (211), 70 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:18,849 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 224 transitions. [2022-01-31 19:58:18,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-01-31 19:58:18,850 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:58:18,850 INFO L514 BasicCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:58:18,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-01-31 19:58:18,850 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:58:18,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:58:18,851 INFO L85 PathProgramCache]: Analyzing trace with hash -688094038, now seen corresponding path program 68 times [2022-01-31 19:58:18,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:58:18,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [807381010] [2022-01-31 19:58:18,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:58:18,856 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:58:18,856 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:58:18,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:58:18,871 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:58:18,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:20,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:58:20,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:20,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:58:20,545 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:58:20,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [807381010] [2022-01-31 19:58:20,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [807381010] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:58:20,545 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:58:20,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-01-31 19:58:20,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292085262] [2022-01-31 19:58:20,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:58:20,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-01-31 19:58:20,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:58:20,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-01-31 19:58:20,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 19:58:20,547 INFO L87 Difference]: Start difference. First operand 223 states and 224 transitions. Second operand has 72 states, 72 states have (on average 2.9722222222222223) internal successors, (214), 71 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 19:58:21,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:58:21,544 INFO L93 Difference]: Finished difference Result 585 states and 656 transitions. [2022-01-31 19:58:21,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-31 19:58:21,545 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.9722222222222223) internal successors, (214), 71 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 218 [2022-01-31 19:58:21,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:58:21,546 INFO L225 Difference]: With dead ends: 585 [2022-01-31 19:58:21,547 INFO L226 Difference]: Without dead ends: 573 [2022-01-31 19:58:21,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2559, Invalid=2697, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 19:58:21,548 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 960 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 552 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1029 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 1338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 552 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:58:21,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1029 Valid, 180 Invalid, 1338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [552 Valid, 786 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 19:58:21,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2022-01-31 19:58:21,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 226. [2022-01-31 19:58:21,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 220 states have (on average 1.009090909090909) internal successors, (222), 220 states have internal predecessors, (222), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:58:21,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 227 transitions. [2022-01-31 19:58:21,556 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 227 transitions. Word has length 218 [2022-01-31 19:58:21,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:58:21,557 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 227 transitions. [2022-01-31 19:58:21,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.9722222222222223) internal successors, (214), 71 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 19:58:21,557 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 227 transitions. [2022-01-31 19:58:21,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-01-31 19:58:21,558 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:58:21,558 INFO L514 BasicCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:58:21,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-01-31 19:58:21,558 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:58:21,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:58:21,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1052288107, now seen corresponding path program 69 times [2022-01-31 19:58:21,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:58:21,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1194237999] [2022-01-31 19:58:21,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:58:21,565 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:58:21,566 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:58:21,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:58:21,581 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:58:21,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:23,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:58:23,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:23,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:58:23,389 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:58:23,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1194237999] [2022-01-31 19:58:23,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1194237999] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:58:23,389 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:58:23,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-01-31 19:58:23,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971837954] [2022-01-31 19:58:23,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:58:23,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-01-31 19:58:23,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:58:23,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-01-31 19:58:23,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 19:58:23,392 INFO L87 Difference]: Start difference. First operand 226 states and 227 transitions. Second operand has 73 states, 73 states have (on average 2.9726027397260273) internal successors, (217), 72 states have internal predecessors, (217), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:24,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:58:24,461 INFO L93 Difference]: Finished difference Result 593 states and 665 transitions. [2022-01-31 19:58:24,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-31 19:58:24,461 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.9726027397260273) internal successors, (217), 72 states have internal predecessors, (217), 2 states have call successors, (3), 3 states have 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 19:58:24,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:58:24,463 INFO L225 Difference]: With dead ends: 593 [2022-01-31 19:58:24,463 INFO L226 Difference]: Without dead ends: 581 [2022-01-31 19:58:24,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2631, Invalid=2771, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 19:58:24,464 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 995 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 576 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1065 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 1366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 576 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:58:24,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1065 Valid, 187 Invalid, 1366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [576 Valid, 790 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 19:58:24,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2022-01-31 19:58:24,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 229. [2022-01-31 19:58:24,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 223 states have (on average 1.0089686098654709) internal successors, (225), 223 states have internal predecessors, (225), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:58:24,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 230 transitions. [2022-01-31 19:58:24,473 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 230 transitions. Word has length 221 [2022-01-31 19:58:24,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:58:24,473 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 230 transitions. [2022-01-31 19:58:24,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.9726027397260273) internal successors, (217), 72 states have internal predecessors, (217), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:24,474 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 230 transitions. [2022-01-31 19:58:24,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2022-01-31 19:58:24,474 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:58:24,475 INFO L514 BasicCegarLoop]: trace histogram [70, 70, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:58:24,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-01-31 19:58:24,475 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:58:24,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:58:24,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1670407990, now seen corresponding path program 70 times [2022-01-31 19:58:24,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:58:24,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1608030561] [2022-01-31 19:58:24,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:58:24,483 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:58:24,484 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:58:24,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:58:24,499 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:58:24,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:26,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:58:26,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:26,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:58:26,278 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:58:26,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1608030561] [2022-01-31 19:58:26,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1608030561] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:58:26,279 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:58:26,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-01-31 19:58:26,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973513239] [2022-01-31 19:58:26,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:58:26,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-01-31 19:58:26,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:58:26,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-01-31 19:58:26,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 19:58:26,280 INFO L87 Difference]: Start difference. First operand 229 states and 230 transitions. Second operand has 74 states, 74 states have (on average 2.972972972972973) internal successors, (220), 73 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 19:58:27,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:58:27,448 INFO L93 Difference]: Finished difference Result 601 states and 674 transitions. [2022-01-31 19:58:27,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-31 19:58:27,448 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.972972972972973) internal successors, (220), 73 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 224 [2022-01-31 19:58:27,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:58:27,450 INFO L225 Difference]: With dead ends: 601 [2022-01-31 19:58:27,450 INFO L226 Difference]: Without dead ends: 589 [2022-01-31 19:58:27,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2704, Invalid=2846, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 19:58:27,451 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 958 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 835 mSolverCounterSat, 547 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1029 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 1382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 547 IncrementalHoareTripleChecker+Valid, 835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 19:58:27,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1029 Valid, 174 Invalid, 1382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [547 Valid, 835 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 19:58:27,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2022-01-31 19:58:27,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 232. [2022-01-31 19:58:27,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 226 states have (on average 1.008849557522124) internal successors, (228), 226 states have internal predecessors, (228), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:58:27,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 233 transitions. [2022-01-31 19:58:27,460 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 233 transitions. Word has length 224 [2022-01-31 19:58:27,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:58:27,461 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 233 transitions. [2022-01-31 19:58:27,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.972972972972973) internal successors, (220), 73 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 19:58:27,461 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 233 transitions. [2022-01-31 19:58:27,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2022-01-31 19:58:27,461 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:58:27,462 INFO L514 BasicCegarLoop]: trace histogram [71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:58:27,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-01-31 19:58:27,462 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:58:27,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:58:27,462 INFO L85 PathProgramCache]: Analyzing trace with hash 739922805, now seen corresponding path program 71 times [2022-01-31 19:58:27,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:58:27,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1288223104] [2022-01-31 19:58:27,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:58:27,465 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:58:27,465 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:58:27,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:58:27,478 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:58:27,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:29,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:58:29,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:29,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:58:29,323 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:58:29,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1288223104] [2022-01-31 19:58:29,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1288223104] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:58:29,323 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:58:29,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-01-31 19:58:29,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450771344] [2022-01-31 19:58:29,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:58:29,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-01-31 19:58:29,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:58:29,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-01-31 19:58:29,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 19:58:29,325 INFO L87 Difference]: Start difference. First operand 232 states and 233 transitions. Second operand has 75 states, 75 states have (on average 2.973333333333333) internal successors, (223), 74 states have internal predecessors, (223), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:30,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:58:30,482 INFO L93 Difference]: Finished difference Result 609 states and 683 transitions. [2022-01-31 19:58:30,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-31 19:58:30,483 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.973333333333333) internal successors, (223), 74 states have internal predecessors, (223), 2 states have call successors, (3), 3 states have 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 19:58:30,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:58:30,485 INFO L225 Difference]: With dead ends: 609 [2022-01-31 19:58:30,485 INFO L226 Difference]: Without dead ends: 597 [2022-01-31 19:58:30,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2778, Invalid=2922, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 19:58:30,487 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 849 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 872 mSolverCounterSat, 472 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 921 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 1344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 472 IncrementalHoareTripleChecker+Valid, 872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 19:58:30,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [921 Valid, 191 Invalid, 1344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [472 Valid, 872 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 19:58:30,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2022-01-31 19:58:30,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 235. [2022-01-31 19:58:30,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 229 states have (on average 1.0087336244541485) internal successors, (231), 229 states have internal predecessors, (231), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:58:30,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 236 transitions. [2022-01-31 19:58:30,496 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 236 transitions. Word has length 227 [2022-01-31 19:58:30,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:58:30,496 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 236 transitions. [2022-01-31 19:58:30,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.973333333333333) internal successors, (223), 74 states have internal predecessors, (223), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:30,496 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 236 transitions. [2022-01-31 19:58:30,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-01-31 19:58:30,497 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:58:30,497 INFO L514 BasicCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:58:30,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-01-31 19:58:30,498 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:58:30,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:58:30,498 INFO L85 PathProgramCache]: Analyzing trace with hash -653585174, now seen corresponding path program 72 times [2022-01-31 19:58:30,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:58:30,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1264267546] [2022-01-31 19:58:30,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:58:30,504 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:58:30,504 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:58:30,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:58:30,521 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:58:30,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:32,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:58:32,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:32,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:58:32,457 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:58:32,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1264267546] [2022-01-31 19:58:32,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1264267546] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:58:32,457 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:58:32,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-01-31 19:58:32,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326320014] [2022-01-31 19:58:32,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:58:32,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-01-31 19:58:32,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:58:32,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-01-31 19:58:32,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 19:58:32,460 INFO L87 Difference]: Start difference. First operand 235 states and 236 transitions. Second operand has 76 states, 76 states have (on average 2.973684210526316) internal successors, (226), 75 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 19:58:33,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:58:33,632 INFO L93 Difference]: Finished difference Result 617 states and 692 transitions. [2022-01-31 19:58:33,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-31 19:58:33,632 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.973684210526316) internal successors, (226), 75 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 230 [2022-01-31 19:58:33,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:58:33,634 INFO L225 Difference]: With dead ends: 617 [2022-01-31 19:58:33,634 INFO L226 Difference]: Without dead ends: 605 [2022-01-31 19:58:33,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2853, Invalid=2999, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 19:58:33,635 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 1220 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 722 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1293 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 1507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 722 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 19:58:33,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1293 Valid, 178 Invalid, 1507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [722 Valid, 785 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 19:58:33,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2022-01-31 19:58:33,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 238. [2022-01-31 19:58:33,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 232 states have (on average 1.0086206896551724) internal successors, (234), 232 states have internal predecessors, (234), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:58:33,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 239 transitions. [2022-01-31 19:58:33,643 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 239 transitions. Word has length 230 [2022-01-31 19:58:33,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:58:33,644 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 239 transitions. [2022-01-31 19:58:33,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.973684210526316) internal successors, (226), 75 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 19:58:33,644 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 239 transitions. [2022-01-31 19:58:33,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2022-01-31 19:58:33,645 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:58:33,645 INFO L514 BasicCegarLoop]: trace histogram [73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:58:33,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-01-31 19:58:33,645 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:58:33,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:58:33,645 INFO L85 PathProgramCache]: Analyzing trace with hash 504095573, now seen corresponding path program 73 times [2022-01-31 19:58:33,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:58:33,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [350619414] [2022-01-31 19:58:33,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:58:33,648 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:58:33,648 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:58:33,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:58:33,662 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:58:33,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:35,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:58:35,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:35,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:58:35,565 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:58:35,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [350619414] [2022-01-31 19:58:35,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [350619414] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:58:35,565 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:58:35,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-01-31 19:58:35,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818867649] [2022-01-31 19:58:35,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:58:35,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-01-31 19:58:35,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:58:35,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-01-31 19:58:35,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 19:58:35,567 INFO L87 Difference]: Start difference. First operand 238 states and 239 transitions. Second operand has 77 states, 77 states have (on average 2.9740259740259742) internal successors, (229), 76 states have internal predecessors, (229), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:36,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:58:36,740 INFO L93 Difference]: Finished difference Result 625 states and 701 transitions. [2022-01-31 19:58:36,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-31 19:58:36,741 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.9740259740259742) internal successors, (229), 76 states have internal predecessors, (229), 2 states have call successors, (3), 3 states have 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 19:58:36,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:58:36,742 INFO L225 Difference]: With dead ends: 625 [2022-01-31 19:58:36,742 INFO L226 Difference]: Without dead ends: 613 [2022-01-31 19:58:36,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2929, Invalid=3077, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 19:58:36,744 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 913 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 916 mSolverCounterSat, 513 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 987 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 1429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 513 IncrementalHoareTripleChecker+Valid, 916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:58:36,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [987 Valid, 195 Invalid, 1429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [513 Valid, 916 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 19:58:36,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2022-01-31 19:58:36,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 241. [2022-01-31 19:58:36,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 235 states have (on average 1.0085106382978724) internal successors, (237), 235 states have internal predecessors, (237), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:58:36,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 242 transitions. [2022-01-31 19:58:36,753 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 242 transitions. Word has length 233 [2022-01-31 19:58:36,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:58:36,753 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 242 transitions. [2022-01-31 19:58:36,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.9740259740259742) internal successors, (229), 76 states have internal predecessors, (229), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:36,753 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 242 transitions. [2022-01-31 19:58:36,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2022-01-31 19:58:36,754 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:58:36,754 INFO L514 BasicCegarLoop]: trace histogram [74, 74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:58:36,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-01-31 19:58:36,754 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:58:36,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:58:36,755 INFO L85 PathProgramCache]: Analyzing trace with hash 383842570, now seen corresponding path program 74 times [2022-01-31 19:58:36,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:58:36,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1395647554] [2022-01-31 19:58:36,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:58:36,760 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:58:36,760 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:58:36,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:58:36,778 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:58:36,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:38,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:58:38,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:38,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:58:38,720 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:58:38,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1395647554] [2022-01-31 19:58:38,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1395647554] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:58:38,721 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:58:38,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-01-31 19:58:38,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613735088] [2022-01-31 19:58:38,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:58:38,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-01-31 19:58:38,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:58:38,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-01-31 19:58:38,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 19:58:38,723 INFO L87 Difference]: Start difference. First operand 241 states and 242 transitions. Second operand has 78 states, 78 states have (on average 2.9743589743589745) internal successors, (232), 77 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 19:58:39,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:58:39,975 INFO L93 Difference]: Finished difference Result 633 states and 710 transitions. [2022-01-31 19:58:39,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-31 19:58:39,976 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.9743589743589745) internal successors, (232), 77 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 236 [2022-01-31 19:58:39,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:58:39,978 INFO L225 Difference]: With dead ends: 633 [2022-01-31 19:58:39,978 INFO L226 Difference]: Without dead ends: 621 [2022-01-31 19:58:39,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3006, Invalid=3156, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 19:58:39,979 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 921 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 982 mSolverCounterSat, 515 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 996 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 1497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 515 IncrementalHoareTripleChecker+Valid, 982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 19:58:39,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [996 Valid, 192 Invalid, 1497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [515 Valid, 982 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 19:58:39,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2022-01-31 19:58:39,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 244. [2022-01-31 19:58:39,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 238 states have (on average 1.0084033613445378) internal successors, (240), 238 states have internal predecessors, (240), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:58:39,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 245 transitions. [2022-01-31 19:58:39,986 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 245 transitions. Word has length 236 [2022-01-31 19:58:39,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:58:39,986 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 245 transitions. [2022-01-31 19:58:39,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.9743589743589745) internal successors, (232), 77 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 19:58:39,986 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 245 transitions. [2022-01-31 19:58:39,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-01-31 19:58:39,987 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:58:39,987 INFO L514 BasicCegarLoop]: trace histogram [75, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:58:39,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-01-31 19:58:39,987 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:58:39,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:58:39,988 INFO L85 PathProgramCache]: Analyzing trace with hash -70644939, now seen corresponding path program 75 times [2022-01-31 19:58:39,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:58:39,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1986831662] [2022-01-31 19:58:39,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:58:39,996 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:58:39,996 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:58:39,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:58:40,012 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:58:40,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:42,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:58:42,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:42,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:58:42,013 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:58:42,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1986831662] [2022-01-31 19:58:42,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1986831662] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:58:42,014 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:58:42,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-01-31 19:58:42,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323015681] [2022-01-31 19:58:42,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:58:42,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-01-31 19:58:42,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:58:42,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-01-31 19:58:42,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3005, Invalid=3157, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 19:58:42,016 INFO L87 Difference]: Start difference. First operand 244 states and 245 transitions. Second operand has 79 states, 79 states have (on average 2.9746835443037973) internal successors, (235), 78 states have internal predecessors, (235), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:43,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:58:43,320 INFO L93 Difference]: Finished difference Result 641 states and 719 transitions. [2022-01-31 19:58:43,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-01-31 19:58:43,320 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.9746835443037973) internal successors, (235), 78 states have internal predecessors, (235), 2 states have call successors, (3), 3 states have 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 19:58:43,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:58:43,322 INFO L225 Difference]: With dead ends: 641 [2022-01-31 19:58:43,322 INFO L226 Difference]: Without dead ends: 629 [2022-01-31 19:58:43,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3084, Invalid=3236, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 19:58:43,324 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 1055 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 836 mSolverCounterSat, 608 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1131 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 1444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 608 IncrementalHoareTripleChecker+Valid, 836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 19:58:43,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1131 Valid, 194 Invalid, 1444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [608 Valid, 836 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 19:58:43,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2022-01-31 19:58:43,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 247. [2022-01-31 19:58:43,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 241 states have (on average 1.008298755186722) internal successors, (243), 241 states have internal predecessors, (243), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:58:43,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 248 transitions. [2022-01-31 19:58:43,334 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 248 transitions. Word has length 239 [2022-01-31 19:58:43,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:58:43,334 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 248 transitions. [2022-01-31 19:58:43,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.9746835443037973) internal successors, (235), 78 states have internal predecessors, (235), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:43,334 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 248 transitions. [2022-01-31 19:58:43,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2022-01-31 19:58:43,335 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:58:43,335 INFO L514 BasicCegarLoop]: trace histogram [76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:58:43,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-01-31 19:58:43,336 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:58:43,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:58:43,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1971108566, now seen corresponding path program 76 times [2022-01-31 19:58:43,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:58:43,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1342339546] [2022-01-31 19:58:43,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:58:43,340 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:58:43,340 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:58:43,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:58:43,360 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:58:43,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:45,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:58:45,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:45,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:58:45,410 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:58:45,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1342339546] [2022-01-31 19:58:45,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1342339546] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:58:45,410 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:58:45,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-01-31 19:58:45,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174761106] [2022-01-31 19:58:45,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:58:45,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-01-31 19:58:45,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:58:45,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-01-31 19:58:45,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 19:58:45,412 INFO L87 Difference]: Start difference. First operand 247 states and 248 transitions. Second operand has 80 states, 80 states have (on average 2.975) internal successors, (238), 79 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 19:58:46,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:58:46,733 INFO L93 Difference]: Finished difference Result 649 states and 728 transitions. [2022-01-31 19:58:46,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-01-31 19:58:46,734 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.975) internal successors, (238), 79 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 242 [2022-01-31 19:58:46,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:58:46,736 INFO L225 Difference]: With dead ends: 649 [2022-01-31 19:58:46,736 INFO L226 Difference]: Without dead ends: 637 [2022-01-31 19:58:46,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3163, Invalid=3317, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 19:58:46,738 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 949 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 889 mSolverCounterSat, 533 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1026 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 1422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 533 IncrementalHoareTripleChecker+Valid, 889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 19:58:46,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1026 Valid, 201 Invalid, 1422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [533 Valid, 889 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 19:58:46,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2022-01-31 19:58:46,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 250. [2022-01-31 19:58:46,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 244 states have (on average 1.0081967213114753) internal successors, (246), 244 states have internal predecessors, (246), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:58:46,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 251 transitions. [2022-01-31 19:58:46,748 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 251 transitions. Word has length 242 [2022-01-31 19:58:46,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:58:46,748 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 251 transitions. [2022-01-31 19:58:46,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.975) internal successors, (238), 79 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 19:58:46,748 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 251 transitions. [2022-01-31 19:58:46,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2022-01-31 19:58:46,749 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:58:46,749 INFO L514 BasicCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:58:46,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-01-31 19:58:46,750 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:58:46,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:58:46,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1870842645, now seen corresponding path program 77 times [2022-01-31 19:58:46,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:58:46,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2068837029] [2022-01-31 19:58:46,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:58:46,760 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:58:46,760 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:58:46,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:58:46,777 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:58:46,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:48,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:58:48,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:48,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:58:48,878 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:58:48,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2068837029] [2022-01-31 19:58:48,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2068837029] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:58:48,879 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:58:48,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-01-31 19:58:48,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130702468] [2022-01-31 19:58:48,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:58:48,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-01-31 19:58:48,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:58:48,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-01-31 19:58:48,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3162, Invalid=3318, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 19:58:48,881 INFO L87 Difference]: Start difference. First operand 250 states and 251 transitions. Second operand has 81 states, 81 states have (on average 2.9753086419753085) internal successors, (241), 80 states have internal predecessors, (241), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:50,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:58:50,550 INFO L93 Difference]: Finished difference Result 657 states and 737 transitions. [2022-01-31 19:58:50,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-31 19:58:50,551 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.9753086419753085) internal successors, (241), 80 states have internal predecessors, (241), 2 states have call successors, (3), 3 states have 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 19:58:50,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:58:50,554 INFO L225 Difference]: With dead ends: 657 [2022-01-31 19:58:50,554 INFO L226 Difference]: Without dead ends: 645 [2022-01-31 19:58:50,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3243, Invalid=3399, Unknown=0, NotChecked=0, Total=6642 [2022-01-31 19:58:50,555 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 1161 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 981 mSolverCounterSat, 671 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1239 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 1652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 671 IncrementalHoareTripleChecker+Valid, 981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 19:58:50,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1239 Valid, 198 Invalid, 1652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [671 Valid, 981 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 19:58:50,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2022-01-31 19:58:50,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 253. [2022-01-31 19:58:50,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 247 states have (on average 1.008097165991903) internal successors, (249), 247 states have internal predecessors, (249), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:58:50,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 254 transitions. [2022-01-31 19:58:50,569 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 254 transitions. Word has length 245 [2022-01-31 19:58:50,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:58:50,569 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 254 transitions. [2022-01-31 19:58:50,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.9753086419753085) internal successors, (241), 80 states have internal predecessors, (241), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:50,569 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 254 transitions. [2022-01-31 19:58:50,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2022-01-31 19:58:50,570 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:58:50,571 INFO L514 BasicCegarLoop]: trace histogram [78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:58:50,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-01-31 19:58:50,571 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:58:50,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:58:50,571 INFO L85 PathProgramCache]: Analyzing trace with hash 855898442, now seen corresponding path program 78 times [2022-01-31 19:58:50,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:58:50,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [749079308] [2022-01-31 19:58:50,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:58:50,574 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:58:50,574 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:58:50,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:58:50,598 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:58:50,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:52,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:58:52,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:52,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:58:52,832 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:58:52,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [749079308] [2022-01-31 19:58:52,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [749079308] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:58:52,832 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:58:52,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-01-31 19:58:52,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942315566] [2022-01-31 19:58:52,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:58:52,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-01-31 19:58:52,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:58:52,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-01-31 19:58:52,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2022-01-31 19:58:52,836 INFO L87 Difference]: Start difference. First operand 253 states and 254 transitions. Second operand has 82 states, 82 states have (on average 2.975609756097561) internal successors, (244), 81 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 19:58:54,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:58:54,371 INFO L93 Difference]: Finished difference Result 665 states and 746 transitions. [2022-01-31 19:58:54,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-01-31 19:58:54,371 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.975609756097561) internal successors, (244), 81 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 248 [2022-01-31 19:58:54,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:58:54,374 INFO L225 Difference]: With dead ends: 665 [2022-01-31 19:58:54,374 INFO L226 Difference]: Without dead ends: 653 [2022-01-31 19:58:54,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3324, Invalid=3482, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 19:58:54,375 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 896 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 943 mSolverCounterSat, 498 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 975 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 1441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 498 IncrementalHoareTripleChecker+Valid, 943 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 19:58:54,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [975 Valid, 210 Invalid, 1441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [498 Valid, 943 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 19:58:54,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2022-01-31 19:58:54,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 256. [2022-01-31 19:58:54,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 250 states have (on average 1.008) internal successors, (252), 250 states have internal predecessors, (252), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:58:54,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 257 transitions. [2022-01-31 19:58:54,385 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 257 transitions. Word has length 248 [2022-01-31 19:58:54,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:58:54,385 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 257 transitions. [2022-01-31 19:58:54,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.975609756097561) internal successors, (244), 81 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 19:58:54,385 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 257 transitions. [2022-01-31 19:58:54,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2022-01-31 19:58:54,386 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:58:54,387 INFO L514 BasicCegarLoop]: trace histogram [79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:58:54,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-01-31 19:58:54,387 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:58:54,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:58:54,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1222910709, now seen corresponding path program 79 times [2022-01-31 19:58:54,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:58:54,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1284732047] [2022-01-31 19:58:54,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:58:54,390 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:58:54,390 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:58:54,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:58:54,408 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:58:54,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:56,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:58:56,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:56,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:58:56,717 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:58:56,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1284732047] [2022-01-31 19:58:56,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1284732047] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:58:56,717 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:58:56,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-01-31 19:58:56,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733131073] [2022-01-31 19:58:56,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:58:56,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-01-31 19:58:56,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:58:56,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-01-31 19:58:56,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3323, Invalid=3483, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 19:58:56,719 INFO L87 Difference]: Start difference. First operand 256 states and 257 transitions. Second operand has 83 states, 83 states have (on average 2.9759036144578315) internal successors, (247), 82 states have internal predecessors, (247), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:58,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:58:58,016 INFO L93 Difference]: Finished difference Result 673 states and 755 transitions. [2022-01-31 19:58:58,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-31 19:58:58,017 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.9759036144578315) internal successors, (247), 82 states have internal predecessors, (247), 2 states have call successors, (3), 3 states have 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 19:58:58,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:58:58,019 INFO L225 Difference]: With dead ends: 673 [2022-01-31 19:58:58,019 INFO L226 Difference]: Without dead ends: 661 [2022-01-31 19:58:58,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3406, Invalid=3566, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 19:58:58,021 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 1096 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 891 mSolverCounterSat, 628 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1176 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 1519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 628 IncrementalHoareTripleChecker+Valid, 891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 19:58:58,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1176 Valid, 197 Invalid, 1519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [628 Valid, 891 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 19:58:58,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2022-01-31 19:58:58,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 259. [2022-01-31 19:58:58,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 253 states have (on average 1.007905138339921) internal successors, (255), 253 states have internal predecessors, (255), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:58:58,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 260 transitions. [2022-01-31 19:58:58,031 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 260 transitions. Word has length 251 [2022-01-31 19:58:58,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:58:58,031 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 260 transitions. [2022-01-31 19:58:58,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.9759036144578315) internal successors, (247), 82 states have internal predecessors, (247), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:58,032 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 260 transitions. [2022-01-31 19:58:58,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2022-01-31 19:58:58,032 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:58:58,033 INFO L514 BasicCegarLoop]: trace histogram [80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:58:58,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-01-31 19:58:58,033 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:58:58,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:58:58,033 INFO L85 PathProgramCache]: Analyzing trace with hash -101378710, now seen corresponding path program 80 times [2022-01-31 19:58:58,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:58:58,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1886065029] [2022-01-31 19:58:58,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:58:58,036 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:58:58,036 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:58:58,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:58:58,053 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:58:58,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:00,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:59:00,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:00,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:59:00,328 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:59:00,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1886065029] [2022-01-31 19:59:00,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1886065029] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:59:00,329 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:59:00,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-01-31 19:59:00,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94731381] [2022-01-31 19:59:00,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:59:00,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-01-31 19:59:00,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:59:00,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-01-31 19:59:00,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 19:59:00,331 INFO L87 Difference]: Start difference. First operand 259 states and 260 transitions. Second operand has 84 states, 84 states have (on average 2.9761904761904763) internal successors, (250), 83 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 19:59:01,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:59:01,741 INFO L93 Difference]: Finished difference Result 681 states and 764 transitions. [2022-01-31 19:59:01,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-01-31 19:59:01,741 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.9761904761904763) internal successors, (250), 83 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 254 [2022-01-31 19:59:01,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:59:01,743 INFO L225 Difference]: With dead ends: 681 [2022-01-31 19:59:01,743 INFO L226 Difference]: Without dead ends: 669 [2022-01-31 19:59:01,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3489, Invalid=3651, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 19:59:01,745 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 1047 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 1018 mSolverCounterSat, 593 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1128 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 1611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 593 IncrementalHoareTripleChecker+Valid, 1018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 19:59:01,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1128 Valid, 214 Invalid, 1611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [593 Valid, 1018 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 19:59:01,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2022-01-31 19:59:01,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 262. [2022-01-31 19:59:01,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 256 states have (on average 1.0078125) internal successors, (258), 256 states have internal predecessors, (258), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:59:01,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 263 transitions. [2022-01-31 19:59:01,754 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 263 transitions. Word has length 254 [2022-01-31 19:59:01,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:59:01,754 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 263 transitions. [2022-01-31 19:59:01,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.9761904761904763) internal successors, (250), 83 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 19:59:01,754 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 263 transitions. [2022-01-31 19:59:01,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2022-01-31 19:59:01,755 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:59:01,755 INFO L514 BasicCegarLoop]: trace histogram [81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:59:01,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-01-31 19:59:01,756 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:59:01,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:59:01,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1562120917, now seen corresponding path program 81 times [2022-01-31 19:59:01,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:59:01,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2115387218] [2022-01-31 19:59:01,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:59:01,768 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:59:01,768 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:59:01,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:59:01,785 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:59:01,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:04,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:59:04,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:04,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:59:04,085 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:59:04,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2115387218] [2022-01-31 19:59:04,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2115387218] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:59:04,085 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:59:04,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-01-31 19:59:04,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433708376] [2022-01-31 19:59:04,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:59:04,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-01-31 19:59:04,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:59:04,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-01-31 19:59:04,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3488, Invalid=3652, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 19:59:04,088 INFO L87 Difference]: Start difference. First operand 262 states and 263 transitions. Second operand has 85 states, 85 states have (on average 2.976470588235294) internal successors, (253), 84 states have internal predecessors, (253), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:05,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:59:05,601 INFO L93 Difference]: Finished difference Result 689 states and 773 transitions. [2022-01-31 19:59:05,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-31 19:59:05,601 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.976470588235294) internal successors, (253), 84 states have internal predecessors, (253), 2 states have call successors, (3), 3 states have 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 19:59:05,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:59:05,603 INFO L225 Difference]: With dead ends: 689 [2022-01-31 19:59:05,604 INFO L226 Difference]: Without dead ends: 677 [2022-01-31 19:59:05,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3573, Invalid=3737, Unknown=0, NotChecked=0, Total=7310 [2022-01-31 19:59:05,605 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 1061 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 996 mSolverCounterSat, 600 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1143 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 1596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 600 IncrementalHoareTripleChecker+Valid, 996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 19:59:05,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1143 Valid, 221 Invalid, 1596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [600 Valid, 996 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 19:59:05,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2022-01-31 19:59:05,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 265. [2022-01-31 19:59:05,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 259 states have (on average 1.0077220077220077) internal successors, (261), 259 states have internal predecessors, (261), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:59:05,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 266 transitions. [2022-01-31 19:59:05,616 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 266 transitions. Word has length 257 [2022-01-31 19:59:05,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:59:05,616 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 266 transitions. [2022-01-31 19:59:05,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.976470588235294) internal successors, (253), 84 states have internal predecessors, (253), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:05,616 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 266 transitions. [2022-01-31 19:59:05,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2022-01-31 19:59:05,617 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:59:05,617 INFO L514 BasicCegarLoop]: trace histogram [82, 82, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:59:05,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-01-31 19:59:05,617 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:59:05,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:59:05,618 INFO L85 PathProgramCache]: Analyzing trace with hash -748119670, now seen corresponding path program 82 times [2022-01-31 19:59:05,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:59:05,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1924735340] [2022-01-31 19:59:05,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:59:05,620 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:59:05,621 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:59:05,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:59:05,636 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:59:05,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:07,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:59:07,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:07,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:59:07,996 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:59:07,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1924735340] [2022-01-31 19:59:07,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1924735340] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:59:07,996 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:59:07,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-01-31 19:59:07,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616229999] [2022-01-31 19:59:07,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:59:07,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-01-31 19:59:07,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:59:07,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-01-31 19:59:07,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2022-01-31 19:59:07,998 INFO L87 Difference]: Start difference. First operand 265 states and 266 transitions. Second operand has 86 states, 86 states have (on average 2.9767441860465116) internal successors, (256), 85 states have internal predecessors, (256), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:09,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:59:09,489 INFO L93 Difference]: Finished difference Result 697 states and 782 transitions. [2022-01-31 19:59:09,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-01-31 19:59:09,489 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.9767441860465116) internal successors, (256), 85 states have internal predecessors, (256), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 260 [2022-01-31 19:59:09,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:59:09,491 INFO L225 Difference]: With dead ends: 697 [2022-01-31 19:59:09,491 INFO L226 Difference]: Without dead ends: 685 [2022-01-31 19:59:09,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3658, Invalid=3824, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 19:59:09,493 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 1183 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 924 mSolverCounterSat, 682 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1266 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 1606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 682 IncrementalHoareTripleChecker+Valid, 924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 19:59:09,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1266 Valid, 198 Invalid, 1606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [682 Valid, 924 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 19:59:09,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2022-01-31 19:59:09,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 268. [2022-01-31 19:59:09,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 262 states have (on average 1.0076335877862594) internal successors, (264), 262 states have internal predecessors, (264), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:59:09,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 269 transitions. [2022-01-31 19:59:09,501 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 269 transitions. Word has length 260 [2022-01-31 19:59:09,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:59:09,501 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 269 transitions. [2022-01-31 19:59:09,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.9767441860465116) internal successors, (256), 85 states have internal predecessors, (256), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:09,502 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 269 transitions. [2022-01-31 19:59:09,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2022-01-31 19:59:09,503 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:59:09,503 INFO L514 BasicCegarLoop]: trace histogram [83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:59:09,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-01-31 19:59:09,503 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:59:09,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:59:09,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1725471413, now seen corresponding path program 83 times [2022-01-31 19:59:09,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:59:09,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1964501716] [2022-01-31 19:59:09,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:59:09,505 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:59:09,505 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:59:09,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:59:09,522 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:59:09,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:12,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:59:12,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:12,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:59:12,028 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:59:12,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1964501716] [2022-01-31 19:59:12,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1964501716] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:59:12,028 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:59:12,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-01-31 19:59:12,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357441946] [2022-01-31 19:59:12,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:59:12,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-01-31 19:59:12,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:59:12,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-01-31 19:59:12,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3657, Invalid=3825, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 19:59:12,031 INFO L87 Difference]: Start difference. First operand 268 states and 269 transitions. Second operand has 87 states, 87 states have (on average 2.9770114942528734) internal successors, (259), 86 states have internal predecessors, (259), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:13,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:59:13,835 INFO L93 Difference]: Finished difference Result 705 states and 791 transitions. [2022-01-31 19:59:13,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-01-31 19:59:13,836 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.9770114942528734) internal successors, (259), 86 states have internal predecessors, (259), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 263 [2022-01-31 19:59:13,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:59:13,837 INFO L225 Difference]: With dead ends: 705 [2022-01-31 19:59:13,838 INFO L226 Difference]: Without dead ends: 693 [2022-01-31 19:59:13,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3744, Invalid=3912, Unknown=0, NotChecked=0, Total=7656 [2022-01-31 19:59:13,839 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 1089 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 1206 mSolverCounterSat, 614 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1173 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 1820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 614 IncrementalHoareTripleChecker+Valid, 1206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 19:59:13,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1173 Valid, 230 Invalid, 1820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [614 Valid, 1206 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 19:59:13,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2022-01-31 19:59:13,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 271. [2022-01-31 19:59:13,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 265 states have (on average 1.0075471698113208) internal successors, (267), 265 states have internal predecessors, (267), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:59:13,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 272 transitions. [2022-01-31 19:59:13,850 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 272 transitions. Word has length 263 [2022-01-31 19:59:13,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:59:13,850 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 272 transitions. [2022-01-31 19:59:13,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 2.9770114942528734) internal successors, (259), 86 states have internal predecessors, (259), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:13,851 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 272 transitions. [2022-01-31 19:59:13,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-01-31 19:59:13,852 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:59:13,852 INFO L514 BasicCegarLoop]: trace histogram [84, 84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:59:13,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-01-31 19:59:13,852 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:59:13,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:59:13,852 INFO L85 PathProgramCache]: Analyzing trace with hash -571439702, now seen corresponding path program 84 times [2022-01-31 19:59:13,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:59:13,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1215376629] [2022-01-31 19:59:13,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:59:13,856 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:59:13,856 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:59:13,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:59:13,872 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:59:13,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:16,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:59:16,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:16,393 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 19:59:16,393 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:59:16,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1215376629] [2022-01-31 19:59:16,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1215376629] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:59:16,394 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:59:16,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-01-31 19:59:16,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800741912] [2022-01-31 19:59:16,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:59:16,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-01-31 19:59:16,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:59:16,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-01-31 19:59:16,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2022-01-31 19:59:16,395 INFO L87 Difference]: Start difference. First operand 271 states and 272 transitions. Second operand has 88 states, 88 states have (on average 2.977272727272727) internal successors, (262), 87 states have internal predecessors, (262), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:17,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:59:17,968 INFO L93 Difference]: Finished difference Result 713 states and 800 transitions. [2022-01-31 19:59:17,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-31 19:59:17,969 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.977272727272727) internal successors, (262), 87 states have internal predecessors, (262), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 266 [2022-01-31 19:59:17,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:59:17,971 INFO L225 Difference]: With dead ends: 713 [2022-01-31 19:59:17,971 INFO L226 Difference]: Without dead ends: 701 [2022-01-31 19:59:17,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3831, Invalid=4001, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 19:59:17,972 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 1199 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1060 mSolverCounterSat, 686 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1284 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 1746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 686 IncrementalHoareTripleChecker+Valid, 1060 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 19:59:17,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1284 Valid, 202 Invalid, 1746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [686 Valid, 1060 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 19:59:17,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2022-01-31 19:59:17,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 274. [2022-01-31 19:59:17,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 268 states have (on average 1.007462686567164) internal successors, (270), 268 states have internal predecessors, (270), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:59:17,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 275 transitions. [2022-01-31 19:59:17,980 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 275 transitions. Word has length 266 [2022-01-31 19:59:17,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:59:17,980 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 275 transitions. [2022-01-31 19:59:17,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 2.977272727272727) internal successors, (262), 87 states have internal predecessors, (262), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:17,980 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 275 transitions. [2022-01-31 19:59:17,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2022-01-31 19:59:17,981 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:59:17,981 INFO L514 BasicCegarLoop]: trace histogram [85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:59:17,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-01-31 19:59:17,981 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:59:17,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:59:17,982 INFO L85 PathProgramCache]: Analyzing trace with hash -431506795, now seen corresponding path program 85 times [2022-01-31 19:59:17,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:59:17,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1788666990] [2022-01-31 19:59:17,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:59:17,995 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:59:17,995 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:59:17,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:59:18,013 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:59:18,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:20,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:59:20,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:20,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:59:20,558 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:59:20,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1788666990] [2022-01-31 19:59:20,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1788666990] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:59:20,558 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:59:20,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-01-31 19:59:20,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143191992] [2022-01-31 19:59:20,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:59:20,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-01-31 19:59:20,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:59:20,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-01-31 19:59:20,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3830, Invalid=4002, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 19:59:20,561 INFO L87 Difference]: Start difference. First operand 274 states and 275 transitions. Second operand has 89 states, 89 states have (on average 2.9775280898876404) internal successors, (265), 88 states have internal predecessors, (265), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:22,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:59:22,184 INFO L93 Difference]: Finished difference Result 721 states and 809 transitions. [2022-01-31 19:59:22,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-01-31 19:59:22,184 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.9775280898876404) internal successors, (265), 88 states have internal predecessors, (265), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 269 [2022-01-31 19:59:22,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:59:22,186 INFO L225 Difference]: With dead ends: 721 [2022-01-31 19:59:22,186 INFO L226 Difference]: Without dead ends: 709 [2022-01-31 19:59:22,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3919, Invalid=4091, Unknown=0, NotChecked=0, Total=8010 [2022-01-31 19:59:22,187 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 1027 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 1076 mSolverCounterSat, 574 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1113 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 1650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 574 IncrementalHoareTripleChecker+Valid, 1076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 19:59:22,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1113 Valid, 229 Invalid, 1650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [574 Valid, 1076 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 19:59:22,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2022-01-31 19:59:22,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 277. [2022-01-31 19:59:22,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 271 states have (on average 1.007380073800738) internal successors, (273), 271 states have internal predecessors, (273), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:59:22,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 278 transitions. [2022-01-31 19:59:22,195 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 278 transitions. Word has length 269 [2022-01-31 19:59:22,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:59:22,195 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 278 transitions. [2022-01-31 19:59:22,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.9775280898876404) internal successors, (265), 88 states have internal predecessors, (265), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:22,195 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 278 transitions. [2022-01-31 19:59:22,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2022-01-31 19:59:22,196 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:59:22,196 INFO L514 BasicCegarLoop]: trace histogram [86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:59:22,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-01-31 19:59:22,197 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:59:22,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:59:22,197 INFO L85 PathProgramCache]: Analyzing trace with hash -2103518774, now seen corresponding path program 86 times [2022-01-31 19:59:22,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:59:22,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [719366282] [2022-01-31 19:59:22,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:59:22,199 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:59:22,199 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:59:22,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:59:22,216 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:59:22,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:24,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:59:24,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:24,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:59:24,780 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:59:24,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [719366282] [2022-01-31 19:59:24,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [719366282] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:59:24,780 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:59:24,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-01-31 19:59:24,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713723709] [2022-01-31 19:59:24,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:59:24,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-01-31 19:59:24,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:59:24,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-01-31 19:59:24,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3918, Invalid=4092, Unknown=0, NotChecked=0, Total=8010 [2022-01-31 19:59:24,784 INFO L87 Difference]: Start difference. First operand 277 states and 278 transitions. Second operand has 90 states, 90 states have (on average 2.977777777777778) internal successors, (268), 89 states have internal predecessors, (268), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:26,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:59:26,524 INFO L93 Difference]: Finished difference Result 729 states and 818 transitions. [2022-01-31 19:59:26,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-01-31 19:59:26,525 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.977777777777778) internal successors, (268), 89 states have internal predecessors, (268), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 272 [2022-01-31 19:59:26,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:59:26,526 INFO L225 Difference]: With dead ends: 729 [2022-01-31 19:59:26,526 INFO L226 Difference]: Without dead ends: 717 [2022-01-31 19:59:26,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=4008, Invalid=4182, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 19:59:26,528 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 1080 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 1072 mSolverCounterSat, 606 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1167 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 1678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 606 IncrementalHoareTripleChecker+Valid, 1072 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 19:59:26,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1167 Valid, 231 Invalid, 1678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [606 Valid, 1072 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 19:59:26,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2022-01-31 19:59:26,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 280. [2022-01-31 19:59:26,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 274 states have (on average 1.0072992700729928) internal successors, (276), 274 states have internal predecessors, (276), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:59:26,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 281 transitions. [2022-01-31 19:59:26,536 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 281 transitions. Word has length 272 [2022-01-31 19:59:26,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:59:26,537 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 281 transitions. [2022-01-31 19:59:26,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.977777777777778) internal successors, (268), 89 states have internal predecessors, (268), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:26,537 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 281 transitions. [2022-01-31 19:59:26,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2022-01-31 19:59:26,537 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:59:26,538 INFO L514 BasicCegarLoop]: trace histogram [87, 87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:59:26,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-01-31 19:59:26,538 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:59:26,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:59:26,538 INFO L85 PathProgramCache]: Analyzing trace with hash 18313845, now seen corresponding path program 87 times [2022-01-31 19:59:26,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:59:26,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [446644914] [2022-01-31 19:59:26,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:59:26,540 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:59:26,540 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:59:26,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:59:26,557 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:59:26,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:29,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:59:29,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:29,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:59:29,176 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:59:29,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [446644914] [2022-01-31 19:59:29,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [446644914] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:59:29,176 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:59:29,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-01-31 19:59:29,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958362352] [2022-01-31 19:59:29,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:59:29,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-01-31 19:59:29,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:59:29,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-01-31 19:59:29,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4007, Invalid=4183, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 19:59:29,179 INFO L87 Difference]: Start difference. First operand 280 states and 281 transitions. Second operand has 91 states, 91 states have (on average 2.978021978021978) internal successors, (271), 90 states have internal predecessors, (271), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:30,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:59:30,933 INFO L93 Difference]: Finished difference Result 737 states and 827 transitions. [2022-01-31 19:59:30,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-01-31 19:59:30,934 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.978021978021978) internal successors, (271), 90 states have internal predecessors, (271), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 275 [2022-01-31 19:59:30,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:59:30,935 INFO L225 Difference]: With dead ends: 737 [2022-01-31 19:59:30,935 INFO L226 Difference]: Without dead ends: 725 [2022-01-31 19:59:30,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=4098, Invalid=4274, Unknown=0, NotChecked=0, Total=8372 [2022-01-31 19:59:30,937 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 1139 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 1048 mSolverCounterSat, 646 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1227 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 1694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 646 IncrementalHoareTripleChecker+Valid, 1048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 19:59:30,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1227 Valid, 228 Invalid, 1694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [646 Valid, 1048 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 19:59:30,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2022-01-31 19:59:30,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 283. [2022-01-31 19:59:30,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 277 states have (on average 1.0072202166064983) internal successors, (279), 277 states have internal predecessors, (279), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:59:30,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 284 transitions. [2022-01-31 19:59:30,944 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 284 transitions. Word has length 275 [2022-01-31 19:59:30,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:59:30,944 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 284 transitions. [2022-01-31 19:59:30,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.978021978021978) internal successors, (271), 90 states have internal predecessors, (271), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:30,945 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 284 transitions. [2022-01-31 19:59:30,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-01-31 19:59:30,945 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:59:30,945 INFO L514 BasicCegarLoop]: trace histogram [88, 88, 88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:59:30,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-01-31 19:59:30,946 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:59:30,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:59:30,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1794796054, now seen corresponding path program 88 times [2022-01-31 19:59:30,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:59:30,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [201431999] [2022-01-31 19:59:30,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:59:30,948 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:59:30,948 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:59:30,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:59:30,965 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:59:31,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:33,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:59:33,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:33,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:59:33,636 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:59:33,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [201431999] [2022-01-31 19:59:33,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [201431999] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:59:33,636 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:59:33,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-01-31 19:59:33,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957142451] [2022-01-31 19:59:33,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:59:33,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-01-31 19:59:33,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:59:33,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-01-31 19:59:33,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2022-01-31 19:59:33,639 INFO L87 Difference]: Start difference. First operand 283 states and 284 transitions. Second operand has 92 states, 92 states have (on average 2.9782608695652173) internal successors, (274), 91 states have internal predecessors, (274), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:35,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:59:35,467 INFO L93 Difference]: Finished difference Result 745 states and 836 transitions. [2022-01-31 19:59:35,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-01-31 19:59:35,467 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.9782608695652173) internal successors, (274), 91 states have internal predecessors, (274), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 278 [2022-01-31 19:59:35,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:59:35,469 INFO L225 Difference]: With dead ends: 745 [2022-01-31 19:59:35,469 INFO L226 Difference]: Without dead ends: 733 [2022-01-31 19:59:35,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=4189, Invalid=4367, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 19:59:35,470 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 1291 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 1018 mSolverCounterSat, 746 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1380 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 1764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 746 IncrementalHoareTripleChecker+Valid, 1018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 19:59:35,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1380 Valid, 220 Invalid, 1764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [746 Valid, 1018 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 19:59:35,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2022-01-31 19:59:35,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 286. [2022-01-31 19:59:35,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 280 states have (on average 1.0071428571428571) internal successors, (282), 280 states have internal predecessors, (282), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:59:35,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 287 transitions. [2022-01-31 19:59:35,478 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 287 transitions. Word has length 278 [2022-01-31 19:59:35,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:59:35,478 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 287 transitions. [2022-01-31 19:59:35,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.9782608695652173) internal successors, (274), 91 states have internal predecessors, (274), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:35,478 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 287 transitions. [2022-01-31 19:59:35,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2022-01-31 19:59:35,479 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:59:35,479 INFO L514 BasicCegarLoop]: trace histogram [89, 89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:59:35,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2022-01-31 19:59:35,479 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:59:35,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:59:35,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1651884629, now seen corresponding path program 89 times [2022-01-31 19:59:35,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:59:35,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [411554479] [2022-01-31 19:59:35,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:59:35,483 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:59:35,483 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:59:35,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:59:35,504 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:59:35,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:38,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:59:38,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:38,279 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 19:59:38,280 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:59:38,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [411554479] [2022-01-31 19:59:38,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [411554479] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:59:38,280 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:59:38,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-01-31 19:59:38,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194256366] [2022-01-31 19:59:38,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:59:38,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-01-31 19:59:38,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:59:38,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-01-31 19:59:38,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4188, Invalid=4368, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 19:59:38,283 INFO L87 Difference]: Start difference. First operand 286 states and 287 transitions. Second operand has 93 states, 93 states have (on average 2.978494623655914) internal successors, (277), 92 states have internal predecessors, (277), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:40,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:59:40,075 INFO L93 Difference]: Finished difference Result 753 states and 845 transitions. [2022-01-31 19:59:40,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-01-31 19:59:40,075 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 2.978494623655914) internal successors, (277), 92 states have internal predecessors, (277), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 281 [2022-01-31 19:59:40,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:59:40,077 INFO L225 Difference]: With dead ends: 753 [2022-01-31 19:59:40,077 INFO L226 Difference]: Without dead ends: 741 [2022-01-31 19:59:40,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=4281, Invalid=4461, Unknown=0, NotChecked=0, Total=8742 [2022-01-31 19:59:40,079 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 1383 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1020 mSolverCounterSat, 806 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1473 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 1826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 806 IncrementalHoareTripleChecker+Valid, 1020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 19:59:40,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1473 Valid, 207 Invalid, 1826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [806 Valid, 1020 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 19:59:40,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2022-01-31 19:59:40,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 289. [2022-01-31 19:59:40,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 283 states have (on average 1.0070671378091873) internal successors, (285), 283 states have internal predecessors, (285), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:59:40,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 290 transitions. [2022-01-31 19:59:40,087 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 290 transitions. Word has length 281 [2022-01-31 19:59:40,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:59:40,087 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 290 transitions. [2022-01-31 19:59:40,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 2.978494623655914) internal successors, (277), 92 states have internal predecessors, (277), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:40,087 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 290 transitions. [2022-01-31 19:59:40,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2022-01-31 19:59:40,088 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:59:40,088 INFO L514 BasicCegarLoop]: trace histogram [90, 90, 90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:59:40,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2022-01-31 19:59:40,088 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:59:40,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:59:40,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1932966410, now seen corresponding path program 90 times [2022-01-31 19:59:40,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:59:40,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1636418651] [2022-01-31 19:59:40,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:59:40,091 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:59:40,091 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:59:40,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:59:40,115 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:59:40,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:42,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:59:42,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:42,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:59:42,923 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:59:42,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1636418651] [2022-01-31 19:59:42,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1636418651] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:59:42,923 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:59:42,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-01-31 19:59:42,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236301470] [2022-01-31 19:59:42,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:59:42,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-01-31 19:59:42,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:59:42,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-01-31 19:59:42,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4280, Invalid=4462, Unknown=0, NotChecked=0, Total=8742 [2022-01-31 19:59:42,926 INFO L87 Difference]: Start difference. First operand 289 states and 290 transitions. Second operand has 94 states, 94 states have (on average 2.978723404255319) internal successors, (280), 93 states have internal predecessors, (280), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:44,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:59:44,853 INFO L93 Difference]: Finished difference Result 761 states and 854 transitions. [2022-01-31 19:59:44,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-01-31 19:59:44,854 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.978723404255319) internal successors, (280), 93 states have internal predecessors, (280), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 284 [2022-01-31 19:59:44,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:59:44,855 INFO L225 Difference]: With dead ends: 761 [2022-01-31 19:59:44,855 INFO L226 Difference]: Without dead ends: 749 [2022-01-31 19:59:44,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=4374, Invalid=4556, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 19:59:44,857 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 1220 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 1095 mSolverCounterSat, 697 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1311 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 1792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 697 IncrementalHoareTripleChecker+Valid, 1095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 19:59:44,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1311 Valid, 234 Invalid, 1792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [697 Valid, 1095 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 19:59:44,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2022-01-31 19:59:44,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 292. [2022-01-31 19:59:44,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 286 states have (on average 1.006993006993007) internal successors, (288), 286 states have internal predecessors, (288), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:59:44,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 293 transitions. [2022-01-31 19:59:44,867 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 293 transitions. Word has length 284 [2022-01-31 19:59:44,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:59:44,867 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 293 transitions. [2022-01-31 19:59:44,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 2.978723404255319) internal successors, (280), 93 states have internal predecessors, (280), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:44,867 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 293 transitions. [2022-01-31 19:59:44,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2022-01-31 19:59:44,868 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:59:44,868 INFO L514 BasicCegarLoop]: trace histogram [91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:59:44,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2022-01-31 19:59:44,868 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:59:44,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:59:44,868 INFO L85 PathProgramCache]: Analyzing trace with hash 454076981, now seen corresponding path program 91 times [2022-01-31 19:59:44,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:59:44,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [775605688] [2022-01-31 19:59:44,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:59:44,871 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:59:44,871 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:59:44,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:59:44,894 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:59:45,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:47,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:59:47,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:47,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:59:47,782 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:59:47,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [775605688] [2022-01-31 19:59:47,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [775605688] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:59:47,782 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:59:47,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-01-31 19:59:47,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320318787] [2022-01-31 19:59:47,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:59:47,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-01-31 19:59:47,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:59:47,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-01-31 19:59:47,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4373, Invalid=4557, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 19:59:47,785 INFO L87 Difference]: Start difference. First operand 292 states and 293 transitions. Second operand has 95 states, 95 states have (on average 2.9789473684210526) internal successors, (283), 94 states have internal predecessors, (283), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:49,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:59:49,823 INFO L93 Difference]: Finished difference Result 769 states and 863 transitions. [2022-01-31 19:59:49,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-01-31 19:59:49,823 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.9789473684210526) internal successors, (283), 94 states have internal predecessors, (283), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 287 [2022-01-31 19:59:49,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:59:49,825 INFO L225 Difference]: With dead ends: 769 [2022-01-31 19:59:49,825 INFO L226 Difference]: Without dead ends: 757 [2022-01-31 19:59:49,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=4468, Invalid=4652, Unknown=0, NotChecked=0, Total=9120 [2022-01-31 19:59:49,826 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 1216 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 1154 mSolverCounterSat, 689 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1308 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 1843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 689 IncrementalHoareTripleChecker+Valid, 1154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 19:59:49,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1308 Valid, 221 Invalid, 1843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [689 Valid, 1154 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 19:59:49,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2022-01-31 19:59:49,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 295. [2022-01-31 19:59:49,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 289 states have (on average 1.0069204152249136) internal successors, (291), 289 states have internal predecessors, (291), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:59:49,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 296 transitions. [2022-01-31 19:59:49,834 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 296 transitions. Word has length 287 [2022-01-31 19:59:49,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:59:49,835 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 296 transitions. [2022-01-31 19:59:49,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.9789473684210526) internal successors, (283), 94 states have internal predecessors, (283), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:49,835 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 296 transitions. [2022-01-31 19:59:49,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2022-01-31 19:59:49,836 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:59:49,836 INFO L514 BasicCegarLoop]: trace histogram [92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:59:49,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2022-01-31 19:59:49,836 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:59:49,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:59:49,836 INFO L85 PathProgramCache]: Analyzing trace with hash 633620010, now seen corresponding path program 92 times [2022-01-31 19:59:49,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:59:49,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1963986339] [2022-01-31 19:59:49,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:59:49,838 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:59:49,838 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:59:49,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:59:49,861 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:59:49,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:52,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:59:52,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:52,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:59:52,789 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:59:52,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1963986339] [2022-01-31 19:59:52,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1963986339] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:59:52,789 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:59:52,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-01-31 19:59:52,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122752989] [2022-01-31 19:59:52,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:59:52,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-01-31 19:59:52,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:59:52,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-01-31 19:59:52,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2022-01-31 19:59:52,792 INFO L87 Difference]: Start difference. First operand 295 states and 296 transitions. Second operand has 96 states, 96 states have (on average 2.9791666666666665) internal successors, (286), 95 states have internal predecessors, (286), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:54,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:59:54,974 INFO L93 Difference]: Finished difference Result 777 states and 872 transitions. [2022-01-31 19:59:54,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-31 19:59:54,975 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.9791666666666665) internal successors, (286), 95 states have internal predecessors, (286), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 290 [2022-01-31 19:59:54,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:59:54,976 INFO L225 Difference]: With dead ends: 777 [2022-01-31 19:59:54,976 INFO L226 Difference]: Without dead ends: 765 [2022-01-31 19:59:54,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4563, Invalid=4749, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 19:59:54,977 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 1278 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 1153 mSolverCounterSat, 729 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1371 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 1882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 729 IncrementalHoareTripleChecker+Valid, 1153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:59:54,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1371 Valid, 218 Invalid, 1882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [729 Valid, 1153 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 19:59:54,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2022-01-31 19:59:54,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 298. [2022-01-31 19:59:54,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 292 states have (on average 1.0068493150684932) internal successors, (294), 292 states have internal predecessors, (294), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:59:54,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 299 transitions. [2022-01-31 19:59:54,985 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 299 transitions. Word has length 290 [2022-01-31 19:59:54,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:59:54,985 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 299 transitions. [2022-01-31 19:59:54,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.9791666666666665) internal successors, (286), 95 states have internal predecessors, (286), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:54,985 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 299 transitions. [2022-01-31 19:59:54,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2022-01-31 19:59:54,986 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:59:54,986 INFO L514 BasicCegarLoop]: trace histogram [93, 93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:59:54,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2022-01-31 19:59:54,987 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:59:54,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:59:54,987 INFO L85 PathProgramCache]: Analyzing trace with hash -2129253867, now seen corresponding path program 93 times [2022-01-31 19:59:54,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:59:54,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [886306283] [2022-01-31 19:59:54,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:59:54,990 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:59:54,990 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:59:54,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:59:55,017 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:59:55,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:58,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:59:58,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:58,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:59:58,035 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:59:58,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [886306283] [2022-01-31 19:59:58,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [886306283] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:59:58,035 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:59:58,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-01-31 19:59:58,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047703779] [2022-01-31 19:59:58,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:59:58,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-01-31 19:59:58,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:59:58,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-01-31 19:59:58,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4562, Invalid=4750, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 19:59:58,038 INFO L87 Difference]: Start difference. First operand 298 states and 299 transitions. Second operand has 97 states, 97 states have (on average 2.979381443298969) internal successors, (289), 96 states have internal predecessors, (289), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:59,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:59:59,985 INFO L93 Difference]: Finished difference Result 785 states and 881 transitions. [2022-01-31 19:59:59,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-01-31 19:59:59,986 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.979381443298969) internal successors, (289), 96 states have internal predecessors, (289), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 293 [2022-01-31 19:59:59,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:59:59,987 INFO L225 Difference]: With dead ends: 785 [2022-01-31 19:59:59,988 INFO L226 Difference]: Without dead ends: 773 [2022-01-31 19:59:59,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4659, Invalid=4847, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 19:59:59,989 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 1250 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 1054 mSolverCounterSat, 711 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1344 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 1765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 711 IncrementalHoareTripleChecker+Valid, 1054 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 19:59:59,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1344 Valid, 225 Invalid, 1765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [711 Valid, 1054 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 19:59:59,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773 states. [2022-01-31 19:59:59,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773 to 301. [2022-01-31 19:59:59,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 295 states have (on average 1.006779661016949) internal successors, (297), 295 states have internal predecessors, (297), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:59:59,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 302 transitions. [2022-01-31 19:59:59,998 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 302 transitions. Word has length 293 [2022-01-31 19:59:59,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:59:59,998 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 302 transitions. [2022-01-31 19:59:59,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.979381443298969) internal successors, (289), 96 states have internal predecessors, (289), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:59,999 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 302 transitions. [2022-01-31 20:00:00,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2022-01-31 20:00:00,000 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:00:00,000 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:00:00,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2022-01-31 20:00:00,000 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:00:00,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:00:00,000 INFO L85 PathProgramCache]: Analyzing trace with hash 2143304266, now seen corresponding path program 94 times [2022-01-31 20:00:00,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:00:00,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2097107583] [2022-01-31 20:00:00,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:00:00,013 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:00:00,014 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:00:00,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:00:00,048 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:00:00,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:03,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:00:03,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:03,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:00:03,326 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:00:03,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2097107583] [2022-01-31 20:00:03,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2097107583] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:00:03,326 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:00:03,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-01-31 20:00:03,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928715930] [2022-01-31 20:00:03,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:00:03,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-01-31 20:00:03,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:00:03,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-01-31 20:00:03,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 20:00:03,329 INFO L87 Difference]: Start difference. First operand 301 states and 302 transitions. Second operand has 98 states, 98 states have (on average 2.979591836734694) internal successors, (292), 97 states have internal predecessors, (292), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:00:05,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:00:05,436 INFO L93 Difference]: Finished difference Result 793 states and 890 transitions. [2022-01-31 20:00:05,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-01-31 20:00:05,437 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.979591836734694) internal successors, (292), 97 states have internal predecessors, (292), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 296 [2022-01-31 20:00:05,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:00:05,438 INFO L225 Difference]: With dead ends: 793 [2022-01-31 20:00:05,439 INFO L226 Difference]: Without dead ends: 781 [2022-01-31 20:00:05,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4756, Invalid=4946, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 20:00:05,440 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 1342 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 1240 mSolverCounterSat, 771 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1437 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 2011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 771 IncrementalHoareTripleChecker+Valid, 1240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:00:05,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1437 Valid, 232 Invalid, 2011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [771 Valid, 1240 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 20:00:05,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2022-01-31 20:00:05,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 304. [2022-01-31 20:00:05,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 298 states have (on average 1.0067114093959733) internal successors, (300), 298 states have internal predecessors, (300), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:00:05,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 305 transitions. [2022-01-31 20:00:05,448 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 305 transitions. Word has length 296 [2022-01-31 20:00:05,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:00:05,449 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 305 transitions. [2022-01-31 20:00:05,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.979591836734694) internal successors, (292), 97 states have internal predecessors, (292), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:00:05,449 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 305 transitions. [2022-01-31 20:00:05,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2022-01-31 20:00:05,450 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:00:05,450 INFO L514 BasicCegarLoop]: trace histogram [95, 95, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:00:05,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2022-01-31 20:00:05,450 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:00:05,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:00:05,450 INFO L85 PathProgramCache]: Analyzing trace with hash 271860213, now seen corresponding path program 95 times [2022-01-31 20:00:05,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:00:05,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1434434573] [2022-01-31 20:00:05,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:00:05,460 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:00:05,460 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:00:05,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:00:05,492 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:00:05,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:08,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:00:08,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:08,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:00:08,584 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:00:08,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1434434573] [2022-01-31 20:00:08,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1434434573] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:00:08,585 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:00:08,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-01-31 20:00:08,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937578752] [2022-01-31 20:00:08,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:00:08,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-01-31 20:00:08,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:00:08,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-01-31 20:00:08,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4755, Invalid=4947, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 20:00:08,587 INFO L87 Difference]: Start difference. First operand 304 states and 305 transitions. Second operand has 99 states, 99 states have (on average 2.9797979797979797) internal successors, (295), 98 states have internal predecessors, (295), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:00:10,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:00:10,730 INFO L93 Difference]: Finished difference Result 801 states and 899 transitions. [2022-01-31 20:00:10,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-01-31 20:00:10,730 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.9797979797979797) internal successors, (295), 98 states have internal predecessors, (295), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 299 [2022-01-31 20:00:10,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:00:10,732 INFO L225 Difference]: With dead ends: 801 [2022-01-31 20:00:10,732 INFO L226 Difference]: Without dead ends: 789 [2022-01-31 20:00:10,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4854, Invalid=5046, Unknown=0, NotChecked=0, Total=9900 [2022-01-31 20:00:10,734 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 1173 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 1157 mSolverCounterSat, 657 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1269 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 1814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 657 IncrementalHoareTripleChecker+Valid, 1157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:00:10,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1269 Valid, 239 Invalid, 1814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [657 Valid, 1157 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 20:00:10,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2022-01-31 20:00:10,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 307. [2022-01-31 20:00:10,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 301 states have (on average 1.0066445182724253) internal successors, (303), 301 states have internal predecessors, (303), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:00:10,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 308 transitions. [2022-01-31 20:00:10,742 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 308 transitions. Word has length 299 [2022-01-31 20:00:10,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:00:10,742 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 308 transitions. [2022-01-31 20:00:10,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.9797979797979797) internal successors, (295), 98 states have internal predecessors, (295), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:00:10,743 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 308 transitions. [2022-01-31 20:00:10,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2022-01-31 20:00:10,743 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:00:10,744 INFO L514 BasicCegarLoop]: trace histogram [96, 96, 96, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:00:10,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2022-01-31 20:00:10,744 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:00:10,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:00:10,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1052546666, now seen corresponding path program 96 times [2022-01-31 20:00:10,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:00:10,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1634993405] [2022-01-31 20:00:10,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:00:10,746 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:00:10,746 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:00:10,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:00:10,772 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:00:10,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:13,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:00:13,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:13,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:00:13,988 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:00:13,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1634993405] [2022-01-31 20:00:13,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1634993405] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:00:13,988 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:00:13,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-01-31 20:00:13,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129190979] [2022-01-31 20:00:13,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:00:13,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-01-31 20:00:13,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:00:13,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-01-31 20:00:13,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2022-01-31 20:00:13,991 INFO L87 Difference]: Start difference. First operand 307 states and 308 transitions. Second operand has 100 states, 100 states have (on average 2.98) internal successors, (298), 99 states have internal predecessors, (298), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:00:16,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:00:16,086 INFO L93 Difference]: Finished difference Result 809 states and 908 transitions. [2022-01-31 20:00:16,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-01-31 20:00:16,086 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.98) internal successors, (298), 99 states have internal predecessors, (298), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 302 [2022-01-31 20:00:16,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:00:16,088 INFO L225 Difference]: With dead ends: 809 [2022-01-31 20:00:16,088 INFO L226 Difference]: Without dead ends: 797 [2022-01-31 20:00:16,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4953, Invalid=5147, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 20:00:16,089 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 1301 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 1129 mSolverCounterSat, 741 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1398 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 1870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 741 IncrementalHoareTripleChecker+Valid, 1129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:00:16,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1398 Valid, 241 Invalid, 1870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [741 Valid, 1129 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 20:00:16,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2022-01-31 20:00:16,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 310. [2022-01-31 20:00:16,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 304 states have (on average 1.006578947368421) internal successors, (306), 304 states have internal predecessors, (306), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:00:16,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 311 transitions. [2022-01-31 20:00:16,098 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 311 transitions. Word has length 302 [2022-01-31 20:00:16,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:00:16,098 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 311 transitions. [2022-01-31 20:00:16,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 2.98) internal successors, (298), 99 states have internal predecessors, (298), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:00:16,099 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 311 transitions. [2022-01-31 20:00:16,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2022-01-31 20:00:16,100 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:00:16,100 INFO L514 BasicCegarLoop]: trace histogram [97, 97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:00:16,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2022-01-31 20:00:16,100 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:00:16,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:00:16,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1234760149, now seen corresponding path program 97 times [2022-01-31 20:00:16,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:00:16,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2016289724] [2022-01-31 20:00:16,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:00:16,103 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:00:16,103 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:00:16,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:00:16,126 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:00:16,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:19,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:00:19,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:19,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:00:19,390 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:00:19,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2016289724] [2022-01-31 20:00:19,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2016289724] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:00:19,391 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:00:19,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-01-31 20:00:19,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164796606] [2022-01-31 20:00:19,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:00:19,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-01-31 20:00:19,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:00:19,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-01-31 20:00:19,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4952, Invalid=5148, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 20:00:19,396 INFO L87 Difference]: Start difference. First operand 310 states and 311 transitions. Second operand has 101 states, 101 states have (on average 2.98019801980198) internal successors, (301), 100 states have internal predecessors, (301), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:00:21,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:00:21,921 INFO L93 Difference]: Finished difference Result 817 states and 917 transitions. [2022-01-31 20:00:21,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-01-31 20:00:21,922 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.98019801980198) internal successors, (301), 100 states have internal predecessors, (301), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 305 [2022-01-31 20:00:21,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:00:21,924 INFO L225 Difference]: With dead ends: 817 [2022-01-31 20:00:21,924 INFO L226 Difference]: Without dead ends: 805 [2022-01-31 20:00:21,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=5053, Invalid=5249, Unknown=0, NotChecked=0, Total=10302 [2022-01-31 20:00:21,925 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 1348 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 1139 mSolverCounterSat, 773 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1446 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 1912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 773 IncrementalHoareTripleChecker+Valid, 1139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:00:21,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1446 Valid, 248 Invalid, 1912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [773 Valid, 1139 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 20:00:21,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 805 states. [2022-01-31 20:00:21,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 805 to 313. [2022-01-31 20:00:21,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 307 states have (on average 1.006514657980456) internal successors, (309), 307 states have internal predecessors, (309), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:00:21,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 314 transitions. [2022-01-31 20:00:21,937 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 314 transitions. Word has length 305 [2022-01-31 20:00:21,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:00:21,937 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 314 transitions. [2022-01-31 20:00:21,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.98019801980198) internal successors, (301), 100 states have internal predecessors, (301), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:00:21,937 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 314 transitions. [2022-01-31 20:00:21,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2022-01-31 20:00:21,938 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:00:21,938 INFO L514 BasicCegarLoop]: trace histogram [98, 98, 98, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:00:21,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2022-01-31 20:00:21,938 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:00:21,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:00:21,938 INFO L85 PathProgramCache]: Analyzing trace with hash 717970058, now seen corresponding path program 98 times [2022-01-31 20:00:21,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:00:21,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [472375001] [2022-01-31 20:00:21,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:00:21,942 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:00:21,943 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:00:21,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:00:21,969 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:00:22,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:25,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:00:25,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:25,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:00:25,294 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:00:25,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [472375001] [2022-01-31 20:00:25,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [472375001] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:00:25,294 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:00:25,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2022-01-31 20:00:25,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936790753] [2022-01-31 20:00:25,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:00:25,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-01-31 20:00:25,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:00:25,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-01-31 20:00:25,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2022-01-31 20:00:25,297 INFO L87 Difference]: Start difference. First operand 313 states and 314 transitions. Second operand has 102 states, 102 states have (on average 2.980392156862745) internal successors, (304), 101 states have internal predecessors, (304), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:00:27,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:00:27,886 INFO L93 Difference]: Finished difference Result 825 states and 926 transitions. [2022-01-31 20:00:27,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-01-31 20:00:27,886 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.980392156862745) internal successors, (304), 101 states have internal predecessors, (304), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 308 [2022-01-31 20:00:27,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:00:27,892 INFO L225 Difference]: With dead ends: 825 [2022-01-31 20:00:27,892 INFO L226 Difference]: Without dead ends: 813 [2022-01-31 20:00:27,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=5154, Invalid=5352, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 20:00:27,894 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 1626 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 1073 mSolverCounterSat, 956 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1725 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 2029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 956 IncrementalHoareTripleChecker+Valid, 1073 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:00:27,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1725 Valid, 225 Invalid, 2029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [956 Valid, 1073 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 20:00:27,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 813 states. [2022-01-31 20:00:27,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 813 to 316. [2022-01-31 20:00:27,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 310 states have (on average 1.0064516129032257) internal successors, (312), 310 states have internal predecessors, (312), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:00:27,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 317 transitions. [2022-01-31 20:00:27,911 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 317 transitions. Word has length 308 [2022-01-31 20:00:27,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:00:27,911 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 317 transitions. [2022-01-31 20:00:27,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 2.980392156862745) internal successors, (304), 101 states have internal predecessors, (304), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:00:27,911 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 317 transitions. [2022-01-31 20:00:27,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2022-01-31 20:00:27,914 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:00:27,914 INFO L514 BasicCegarLoop]: trace histogram [99, 99, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:00:27,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2022-01-31 20:00:27,914 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:00:27,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:00:27,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1812842059, now seen corresponding path program 99 times [2022-01-31 20:00:27,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:00:27,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1299555064] [2022-01-31 20:00:27,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:00:27,920 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:00:27,920 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:00:27,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:00:27,945 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:00:28,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:31,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:00:31,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:31,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:00:31,332 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:00:31,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1299555064] [2022-01-31 20:00:31,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1299555064] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:00:31,333 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:00:31,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2022-01-31 20:00:31,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171158767] [2022-01-31 20:00:31,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:00:31,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-01-31 20:00:31,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:00:31,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-01-31 20:00:31,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 20:00:31,336 INFO L87 Difference]: Start difference. First operand 316 states and 317 transitions. Second operand has 103 states, 103 states have (on average 2.9805825242718447) internal successors, (307), 102 states have internal predecessors, (307), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:00:33,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:00:33,942 INFO L93 Difference]: Finished difference Result 833 states and 935 transitions. [2022-01-31 20:00:33,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-01-31 20:00:33,942 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 2.9805825242718447) internal successors, (307), 102 states have internal predecessors, (307), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 311 [2022-01-31 20:00:33,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:00:33,944 INFO L225 Difference]: With dead ends: 833 [2022-01-31 20:00:33,944 INFO L226 Difference]: Without dead ends: 821 [2022-01-31 20:00:33,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=5256, Invalid=5456, Unknown=0, NotChecked=0, Total=10712 [2022-01-31 20:00:33,945 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 1616 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 1187 mSolverCounterSat, 947 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1716 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 2134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 947 IncrementalHoareTripleChecker+Valid, 1187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:00:33,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1716 Valid, 237 Invalid, 2134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [947 Valid, 1187 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 20:00:33,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2022-01-31 20:00:33,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 319. [2022-01-31 20:00:33,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 313 states have (on average 1.0063897763578276) internal successors, (315), 313 states have internal predecessors, (315), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:00:33,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 320 transitions. [2022-01-31 20:00:33,955 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 320 transitions. Word has length 311 [2022-01-31 20:00:33,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:00:33,955 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 320 transitions. [2022-01-31 20:00:33,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 2.9805825242718447) internal successors, (307), 102 states have internal predecessors, (307), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:00:33,956 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 320 transitions. [2022-01-31 20:00:33,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2022-01-31 20:00:33,956 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:00:33,956 INFO L514 BasicCegarLoop]: trace histogram [100, 100, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:00:33,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2022-01-31 20:00:33,957 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:00:33,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:00:33,957 INFO L85 PathProgramCache]: Analyzing trace with hash 914261674, now seen corresponding path program 100 times [2022-01-31 20:00:33,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:00:33,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1576290021] [2022-01-31 20:00:33,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:00:33,961 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:00:33,961 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:00:33,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:00:33,988 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:00:34,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:37,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:00:37,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:37,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:00:37,476 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:00:37,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1576290021] [2022-01-31 20:00:37,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1576290021] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:00:37,476 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:00:37,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2022-01-31 20:00:37,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36336991] [2022-01-31 20:00:37,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:00:37,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-01-31 20:00:37,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:00:37,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-01-31 20:00:37,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-01-31 20:00:37,480 INFO L87 Difference]: Start difference. First operand 319 states and 320 transitions. Second operand has 104 states, 104 states have (on average 2.980769230769231) internal successors, (310), 103 states have internal predecessors, (310), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:00:39,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:00:39,930 INFO L93 Difference]: Finished difference Result 841 states and 944 transitions. [2022-01-31 20:00:39,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-01-31 20:00:39,930 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.980769230769231) internal successors, (310), 103 states have internal predecessors, (310), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 314 [2022-01-31 20:00:39,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:00:39,933 INFO L225 Difference]: With dead ends: 841 [2022-01-31 20:00:39,933 INFO L226 Difference]: Without dead ends: 829 [2022-01-31 20:00:39,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=5359, Invalid=5561, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 20:00:39,935 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 1471 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 1158 mSolverCounterSat, 851 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1572 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 2009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 851 IncrementalHoareTripleChecker+Valid, 1158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:00:39,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1572 Valid, 234 Invalid, 2009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [851 Valid, 1158 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 20:00:39,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2022-01-31 20:00:39,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 322. [2022-01-31 20:00:39,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 316 states have (on average 1.0063291139240507) internal successors, (318), 316 states have internal predecessors, (318), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:00:39,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 323 transitions. [2022-01-31 20:00:39,948 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 323 transitions. Word has length 314 [2022-01-31 20:00:39,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:00:39,949 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 323 transitions. [2022-01-31 20:00:39,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 2.980769230769231) internal successors, (310), 103 states have internal predecessors, (310), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:00:39,949 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 323 transitions. [2022-01-31 20:00:39,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2022-01-31 20:00:39,950 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:00:39,950 INFO L514 BasicCegarLoop]: trace histogram [101, 101, 101, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:00:39,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2022-01-31 20:00:39,950 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:00:39,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:00:39,951 INFO L85 PathProgramCache]: Analyzing trace with hash 460200341, now seen corresponding path program 101 times [2022-01-31 20:00:39,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:00:39,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [860556770] [2022-01-31 20:00:39,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:00:39,953 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:00:39,953 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:00:39,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:00:39,988 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:00:40,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:43,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:00:43,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:43,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:00:43,532 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:00:43,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [860556770] [2022-01-31 20:00:43,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [860556770] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:00:43,532 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:00:43,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2022-01-31 20:00:43,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980386629] [2022-01-31 20:00:43,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:00:43,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-01-31 20:00:43,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:00:43,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-01-31 20:00:43,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5358, Invalid=5562, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 20:00:43,536 INFO L87 Difference]: Start difference. First operand 322 states and 323 transitions. Second operand has 105 states, 105 states have (on average 2.980952380952381) internal successors, (313), 104 states have internal predecessors, (313), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:00:46,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:00:46,263 INFO L93 Difference]: Finished difference Result 849 states and 953 transitions. [2022-01-31 20:00:46,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-01-31 20:00:46,263 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.980952380952381) internal successors, (313), 104 states have internal predecessors, (313), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 317 [2022-01-31 20:00:46,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:00:46,265 INFO L225 Difference]: With dead ends: 849 [2022-01-31 20:00:46,265 INFO L226 Difference]: Without dead ends: 837 [2022-01-31 20:00:46,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=5463, Invalid=5667, Unknown=0, NotChecked=0, Total=11130 [2022-01-31 20:00:46,267 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 1782 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 1263 mSolverCounterSat, 1056 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1884 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 2319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1056 IncrementalHoareTripleChecker+Valid, 1263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:00:46,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1884 Valid, 231 Invalid, 2319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1056 Valid, 1263 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 20:00:46,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 837 states. [2022-01-31 20:00:46,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 837 to 325. [2022-01-31 20:00:46,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 319 states have (on average 1.006269592476489) internal successors, (321), 319 states have internal predecessors, (321), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:00:46,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 326 transitions. [2022-01-31 20:00:46,278 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 326 transitions. Word has length 317 [2022-01-31 20:00:46,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:00:46,278 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 326 transitions. [2022-01-31 20:00:46,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 2.980952380952381) internal successors, (313), 104 states have internal predecessors, (313), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:00:46,279 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 326 transitions. [2022-01-31 20:00:46,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2022-01-31 20:00:46,279 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:00:46,279 INFO L514 BasicCegarLoop]: trace histogram [102, 102, 102, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:00:46,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2022-01-31 20:00:46,279 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:00:46,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:00:46,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1628955958, now seen corresponding path program 102 times [2022-01-31 20:00:46,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:00:46,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2050527435] [2022-01-31 20:00:46,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:00:46,281 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:00:46,281 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:00:46,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:00:46,310 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:00:46,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:49,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:00:49,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:49,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:00:49,873 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:00:49,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2050527435] [2022-01-31 20:00:49,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2050527435] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:00:49,873 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:00:49,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2022-01-31 20:00:49,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878666951] [2022-01-31 20:00:49,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:00:49,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-01-31 20:00:49,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:00:49,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-01-31 20:00:49,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2022-01-31 20:00:49,876 INFO L87 Difference]: Start difference. First operand 325 states and 326 transitions. Second operand has 106 states, 106 states have (on average 2.981132075471698) internal successors, (316), 105 states have internal predecessors, (316), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:00:52,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:00:52,570 INFO L93 Difference]: Finished difference Result 857 states and 962 transitions. [2022-01-31 20:00:52,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-01-31 20:00:52,571 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.981132075471698) internal successors, (316), 105 states have internal predecessors, (316), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 320 [2022-01-31 20:00:52,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:00:52,572 INFO L225 Difference]: With dead ends: 857 [2022-01-31 20:00:52,572 INFO L226 Difference]: Without dead ends: 845 [2022-01-31 20:00:52,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=5568, Invalid=5774, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 20:00:52,574 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 1361 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 1245 mSolverCounterSat, 773 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1464 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 2018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 773 IncrementalHoareTripleChecker+Valid, 1245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:00:52,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1464 Valid, 248 Invalid, 2018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [773 Valid, 1245 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 20:00:52,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2022-01-31 20:00:52,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 328. [2022-01-31 20:00:52,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 322 states have (on average 1.0062111801242235) internal successors, (324), 322 states have internal predecessors, (324), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:00:52,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 329 transitions. [2022-01-31 20:00:52,587 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 329 transitions. Word has length 320 [2022-01-31 20:00:52,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:00:52,588 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 329 transitions. [2022-01-31 20:00:52,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 2.981132075471698) internal successors, (316), 105 states have internal predecessors, (316), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:00:52,588 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 329 transitions. [2022-01-31 20:00:52,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2022-01-31 20:00:52,589 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:00:52,589 INFO L514 BasicCegarLoop]: trace histogram [103, 103, 103, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:00:52,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2022-01-31 20:00:52,589 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:00:52,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:00:52,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1313173131, now seen corresponding path program 103 times [2022-01-31 20:00:52,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:00:52,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [299961511] [2022-01-31 20:00:52,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:00:52,592 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:00:52,592 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:00:52,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:00:52,629 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:00:52,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:56,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:00:56,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:56,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:00:56,285 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:00:56,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [299961511] [2022-01-31 20:00:56,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [299961511] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:00:56,286 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:00:56,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [107] imperfect sequences [] total 107 [2022-01-31 20:00:56,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49092113] [2022-01-31 20:00:56,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:00:56,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-01-31 20:00:56,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:00:56,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-01-31 20:00:56,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5567, Invalid=5775, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 20:00:56,289 INFO L87 Difference]: Start difference. First operand 328 states and 329 transitions. Second operand has 107 states, 107 states have (on average 2.9813084112149535) internal successors, (319), 106 states have internal predecessors, (319), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:00:58,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:00:58,868 INFO L93 Difference]: Finished difference Result 865 states and 971 transitions. [2022-01-31 20:00:58,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-01-31 20:00:58,868 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.9813084112149535) internal successors, (319), 106 states have internal predecessors, (319), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 323 [2022-01-31 20:00:58,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:00:58,870 INFO L225 Difference]: With dead ends: 865 [2022-01-31 20:00:58,870 INFO L226 Difference]: Without dead ends: 853 [2022-01-31 20:00:58,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=5674, Invalid=5882, Unknown=0, NotChecked=0, Total=11556 [2022-01-31 20:00:58,872 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 1345 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 1288 mSolverCounterSat, 764 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1449 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 2052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 764 IncrementalHoareTripleChecker+Valid, 1288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:00:58,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1449 Valid, 255 Invalid, 2052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [764 Valid, 1288 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 20:00:58,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2022-01-31 20:00:58,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 331. [2022-01-31 20:00:58,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 325 states have (on average 1.0061538461538462) internal successors, (327), 325 states have internal predecessors, (327), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:00:58,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 332 transitions. [2022-01-31 20:00:58,881 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 332 transitions. Word has length 323 [2022-01-31 20:00:58,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:00:58,881 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 332 transitions. [2022-01-31 20:00:58,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 2.9813084112149535) internal successors, (319), 106 states have internal predecessors, (319), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:00:58,881 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 332 transitions. [2022-01-31 20:00:58,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2022-01-31 20:00:58,882 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:00:58,882 INFO L514 BasicCegarLoop]: trace histogram [104, 104, 104, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:00:58,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2022-01-31 20:00:58,882 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:00:58,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:00:58,882 INFO L85 PathProgramCache]: Analyzing trace with hash 194647786, now seen corresponding path program 104 times [2022-01-31 20:00:58,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:00:58,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1212477548] [2022-01-31 20:00:58,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:00:58,885 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:00:58,885 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:00:58,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:00:58,918 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:00:59,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:02,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:01:02,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:02,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:01:02,640 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:01:02,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1212477548] [2022-01-31 20:01:02,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1212477548] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:01:02,641 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:01:02,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2022-01-31 20:01:02,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730883096] [2022-01-31 20:01:02,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:01:02,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-01-31 20:01:02,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:01:02,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-01-31 20:01:02,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5673, Invalid=5883, Unknown=0, NotChecked=0, Total=11556 [2022-01-31 20:01:02,645 INFO L87 Difference]: Start difference. First operand 331 states and 332 transitions. Second operand has 108 states, 108 states have (on average 2.9814814814814814) internal successors, (322), 107 states have internal predecessors, (322), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:01:05,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:01:05,495 INFO L93 Difference]: Finished difference Result 873 states and 980 transitions. [2022-01-31 20:01:05,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-01-31 20:01:05,495 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 2.9814814814814814) internal successors, (322), 107 states have internal predecessors, (322), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 326 [2022-01-31 20:01:05,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:01:05,497 INFO L225 Difference]: With dead ends: 873 [2022-01-31 20:01:05,497 INFO L226 Difference]: Without dead ends: 861 [2022-01-31 20:01:05,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=5781, Invalid=5991, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 20:01:05,500 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 1539 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 1178 mSolverCounterSat, 890 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1644 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 2068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 890 IncrementalHoareTripleChecker+Valid, 1178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:01:05,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1644 Valid, 252 Invalid, 2068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [890 Valid, 1178 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 20:01:05,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2022-01-31 20:01:05,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 334. [2022-01-31 20:01:05,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 328 states have (on average 1.0060975609756098) internal successors, (330), 328 states have internal predecessors, (330), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:01:05,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 335 transitions. [2022-01-31 20:01:05,515 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 335 transitions. Word has length 326 [2022-01-31 20:01:05,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:01:05,515 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 335 transitions. [2022-01-31 20:01:05,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 2.9814814814814814) internal successors, (322), 107 states have internal predecessors, (322), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:01:05,515 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 335 transitions. [2022-01-31 20:01:05,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2022-01-31 20:01:05,516 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:01:05,517 INFO L514 BasicCegarLoop]: trace histogram [105, 105, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:01:05,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2022-01-31 20:01:05,517 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:01:05,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:01:05,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1375362731, now seen corresponding path program 105 times [2022-01-31 20:01:05,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:01:05,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1989838326] [2022-01-31 20:01:05,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:01:05,519 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:01:05,519 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:01:05,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:01:05,566 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:01:05,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:09,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:01:09,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:09,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:01:09,324 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:01:09,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1989838326] [2022-01-31 20:01:09,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1989838326] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:01:09,324 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:01:09,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [109] imperfect sequences [] total 109 [2022-01-31 20:01:09,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354870807] [2022-01-31 20:01:09,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:01:09,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-01-31 20:01:09,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:01:09,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-01-31 20:01:09,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5780, Invalid=5992, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 20:01:09,328 INFO L87 Difference]: Start difference. First operand 334 states and 335 transitions. Second operand has 109 states, 109 states have (on average 2.981651376146789) internal successors, (325), 108 states have internal predecessors, (325), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:01:12,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:01:12,041 INFO L93 Difference]: Finished difference Result 881 states and 989 transitions. [2022-01-31 20:01:12,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-01-31 20:01:12,041 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 2.981651376146789) internal successors, (325), 108 states have internal predecessors, (325), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 329 [2022-01-31 20:01:12,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:01:12,043 INFO L225 Difference]: With dead ends: 881 [2022-01-31 20:01:12,043 INFO L226 Difference]: Without dead ends: 869 [2022-01-31 20:01:12,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=5889, Invalid=6101, Unknown=0, NotChecked=0, Total=11990 [2022-01-31 20:01:12,044 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 1946 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 1204 mSolverCounterSat, 1163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2052 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 2367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1163 IncrementalHoareTripleChecker+Valid, 1204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:01:12,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2052 Valid, 244 Invalid, 2367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1163 Valid, 1204 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 20:01:12,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2022-01-31 20:01:12,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 337. [2022-01-31 20:01:12,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 331 states have (on average 1.0060422960725075) internal successors, (333), 331 states have internal predecessors, (333), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:01:12,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 338 transitions. [2022-01-31 20:01:12,052 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 338 transitions. Word has length 329 [2022-01-31 20:01:12,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:01:12,053 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 338 transitions. [2022-01-31 20:01:12,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 2.981651376146789) internal successors, (325), 108 states have internal predecessors, (325), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:01:12,053 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 338 transitions. [2022-01-31 20:01:12,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2022-01-31 20:01:12,053 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:01:12,054 INFO L514 BasicCegarLoop]: trace histogram [106, 106, 106, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:01:12,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2022-01-31 20:01:12,054 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:01:12,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:01:12,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1364821238, now seen corresponding path program 106 times [2022-01-31 20:01:12,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:01:12,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [184055605] [2022-01-31 20:01:12,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:01:12,056 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:01:12,056 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:01:12,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:01:12,086 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:01:12,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:15,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:01:15,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:15,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:01:15,931 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:01:15,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [184055605] [2022-01-31 20:01:15,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [184055605] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:01:15,931 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:01:15,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [110] imperfect sequences [] total 110 [2022-01-31 20:01:15,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909406864] [2022-01-31 20:01:15,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:01:15,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-01-31 20:01:15,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:01:15,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-01-31 20:01:15,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5888, Invalid=6102, Unknown=0, NotChecked=0, Total=11990 [2022-01-31 20:01:15,936 INFO L87 Difference]: Start difference. First operand 337 states and 338 transitions. Second operand has 110 states, 110 states have (on average 2.981818181818182) internal successors, (328), 109 states have internal predecessors, (328), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:01:19,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:01:19,044 INFO L93 Difference]: Finished difference Result 889 states and 998 transitions. [2022-01-31 20:01:19,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-01-31 20:01:19,045 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.981818181818182) internal successors, (328), 109 states have internal predecessors, (328), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 332 [2022-01-31 20:01:19,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:01:19,047 INFO L225 Difference]: With dead ends: 889 [2022-01-31 20:01:19,047 INFO L226 Difference]: Without dead ends: 877 [2022-01-31 20:01:19,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=5998, Invalid=6212, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 20:01:19,049 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 1624 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 1345 mSolverCounterSat, 944 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1731 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 2289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 944 IncrementalHoareTripleChecker+Valid, 1345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:01:19,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1731 Valid, 256 Invalid, 2289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [944 Valid, 1345 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 20:01:19,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2022-01-31 20:01:19,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 340. [2022-01-31 20:01:19,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 334 states have (on average 1.0059880239520957) internal successors, (336), 334 states have internal predecessors, (336), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:01:19,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 341 transitions. [2022-01-31 20:01:19,064 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 341 transitions. Word has length 332 [2022-01-31 20:01:19,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:01:19,064 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 341 transitions. [2022-01-31 20:01:19,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 2.981818181818182) internal successors, (328), 109 states have internal predecessors, (328), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:01:19,064 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 341 transitions. [2022-01-31 20:01:19,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2022-01-31 20:01:19,065 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:01:19,065 INFO L514 BasicCegarLoop]: trace histogram [107, 107, 107, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:01:19,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2022-01-31 20:01:19,065 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:01:19,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:01:19,066 INFO L85 PathProgramCache]: Analyzing trace with hash -855815883, now seen corresponding path program 107 times [2022-01-31 20:01:19,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:01:19,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1558458897] [2022-01-31 20:01:19,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:01:19,068 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:01:19,068 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:01:19,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:01:19,113 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:01:19,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:23,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:01:23,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:23,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:01:23,036 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:01:23,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1558458897] [2022-01-31 20:01:23,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1558458897] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:01:23,036 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:01:23,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [111] imperfect sequences [] total 111 [2022-01-31 20:01:23,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583116463] [2022-01-31 20:01:23,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:01:23,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-01-31 20:01:23,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:01:23,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-01-31 20:01:23,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5997, Invalid=6213, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 20:01:23,041 INFO L87 Difference]: Start difference. First operand 340 states and 341 transitions. Second operand has 111 states, 111 states have (on average 2.981981981981982) internal successors, (331), 110 states have internal predecessors, (331), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:01:26,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:01:26,137 INFO L93 Difference]: Finished difference Result 897 states and 1007 transitions. [2022-01-31 20:01:26,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-01-31 20:01:26,138 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 2.981981981981982) internal successors, (331), 110 states have internal predecessors, (331), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 335 [2022-01-31 20:01:26,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:01:26,140 INFO L225 Difference]: With dead ends: 897 [2022-01-31 20:01:26,141 INFO L226 Difference]: Without dead ends: 885 [2022-01-31 20:01:26,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=6108, Invalid=6324, Unknown=0, NotChecked=0, Total=12432 [2022-01-31 20:01:26,143 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 1551 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 1291 mSolverCounterSat, 894 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1659 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 2185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 894 IncrementalHoareTripleChecker+Valid, 1291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:01:26,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1659 Valid, 258 Invalid, 2185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [894 Valid, 1291 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 20:01:26,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 885 states. [2022-01-31 20:01:26,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 885 to 343. [2022-01-31 20:01:26,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 337 states have (on average 1.0059347181008902) internal successors, (339), 337 states have internal predecessors, (339), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:01:26,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 344 transitions. [2022-01-31 20:01:26,158 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 344 transitions. Word has length 335 [2022-01-31 20:01:26,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:01:26,158 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 344 transitions. [2022-01-31 20:01:26,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 2.981981981981982) internal successors, (331), 110 states have internal predecessors, (331), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:01:26,158 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 344 transitions. [2022-01-31 20:01:26,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2022-01-31 20:01:26,159 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:01:26,159 INFO L514 BasicCegarLoop]: trace histogram [108, 108, 108, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:01:26,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2022-01-31 20:01:26,160 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:01:26,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:01:26,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1688160042, now seen corresponding path program 108 times [2022-01-31 20:01:26,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:01:26,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1903642595] [2022-01-31 20:01:26,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:01:26,162 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:01:26,162 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:01:26,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:01:26,207 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:01:26,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:30,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:01:30,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:30,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:01:30,306 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:01:30,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1903642595] [2022-01-31 20:01:30,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1903642595] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:01:30,306 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:01:30,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [112] imperfect sequences [] total 112 [2022-01-31 20:01:30,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121193537] [2022-01-31 20:01:30,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:01:30,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-01-31 20:01:30,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:01:30,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-01-31 20:01:30,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6107, Invalid=6325, Unknown=0, NotChecked=0, Total=12432 [2022-01-31 20:01:30,310 INFO L87 Difference]: Start difference. First operand 343 states and 344 transitions. Second operand has 112 states, 112 states have (on average 2.982142857142857) internal successors, (334), 111 states have internal predecessors, (334), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:01:33,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:01:33,495 INFO L93 Difference]: Finished difference Result 905 states and 1016 transitions. [2022-01-31 20:01:33,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-01-31 20:01:33,495 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 2.982142857142857) internal successors, (334), 111 states have internal predecessors, (334), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 338 [2022-01-31 20:01:33,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:01:33,497 INFO L225 Difference]: With dead ends: 905 [2022-01-31 20:01:33,497 INFO L226 Difference]: Without dead ends: 893 [2022-01-31 20:01:33,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=6219, Invalid=6437, Unknown=0, NotChecked=0, Total=12656 [2022-01-31 20:01:33,499 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 1724 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 1345 mSolverCounterSat, 1009 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1833 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 2354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1009 IncrementalHoareTripleChecker+Valid, 1345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:01:33,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1833 Valid, 260 Invalid, 2354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1009 Valid, 1345 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 20:01:33,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2022-01-31 20:01:33,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 346. [2022-01-31 20:01:33,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 340 states have (on average 1.0058823529411764) internal successors, (342), 340 states have internal predecessors, (342), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:01:33,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 347 transitions. [2022-01-31 20:01:33,509 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 347 transitions. Word has length 338 [2022-01-31 20:01:33,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:01:33,509 INFO L470 AbstractCegarLoop]: Abstraction has 346 states and 347 transitions. [2022-01-31 20:01:33,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 2.982142857142857) internal successors, (334), 111 states have internal predecessors, (334), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:01:33,509 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 347 transitions. [2022-01-31 20:01:33,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2022-01-31 20:01:33,510 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:01:33,510 INFO L514 BasicCegarLoop]: trace histogram [109, 109, 109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:01:33,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2022-01-31 20:01:33,510 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:01:33,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:01:33,510 INFO L85 PathProgramCache]: Analyzing trace with hash 282036501, now seen corresponding path program 109 times [2022-01-31 20:01:33,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:01:33,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1368316980] [2022-01-31 20:01:33,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:01:33,512 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:01:33,512 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:01:33,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:01:33,541 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:01:33,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:37,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:01:37,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:37,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:01:37,559 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:01:37,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1368316980] [2022-01-31 20:01:37,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1368316980] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:01:37,559 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:01:37,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [113] imperfect sequences [] total 113 [2022-01-31 20:01:37,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616747038] [2022-01-31 20:01:37,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:01:37,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-01-31 20:01:37,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:01:37,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-01-31 20:01:37,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6218, Invalid=6438, Unknown=0, NotChecked=0, Total=12656 [2022-01-31 20:01:37,563 INFO L87 Difference]: Start difference. First operand 346 states and 347 transitions. Second operand has 113 states, 113 states have (on average 2.982300884955752) internal successors, (337), 112 states have internal predecessors, (337), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:01:40,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:01:40,880 INFO L93 Difference]: Finished difference Result 913 states and 1025 transitions. [2022-01-31 20:01:40,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-01-31 20:01:40,880 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 2.982300884955752) internal successors, (337), 112 states have internal predecessors, (337), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 341 [2022-01-31 20:01:40,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:01:40,882 INFO L225 Difference]: With dead ends: 913 [2022-01-31 20:01:40,882 INFO L226 Difference]: Without dead ends: 901 [2022-01-31 20:01:40,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=6331, Invalid=6551, Unknown=0, NotChecked=0, Total=12882 [2022-01-31 20:01:40,884 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 1924 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 1215 mSolverCounterSat, 1142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2034 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 2357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1142 IncrementalHoareTripleChecker+Valid, 1215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:01:40,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2034 Valid, 267 Invalid, 2357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1142 Valid, 1215 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 20:01:40,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 901 states. [2022-01-31 20:01:40,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 901 to 349. [2022-01-31 20:01:40,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 343 states have (on average 1.0058309037900874) internal successors, (345), 343 states have internal predecessors, (345), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:01:40,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 350 transitions. [2022-01-31 20:01:40,897 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 350 transitions. Word has length 341 [2022-01-31 20:01:40,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:01:40,898 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 350 transitions. [2022-01-31 20:01:40,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 2.982300884955752) internal successors, (337), 112 states have internal predecessors, (337), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:01:40,898 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 350 transitions. [2022-01-31 20:01:40,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2022-01-31 20:01:40,899 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:01:40,899 INFO L514 BasicCegarLoop]: trace histogram [110, 110, 110, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:01:40,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2022-01-31 20:01:40,900 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:01:40,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:01:40,900 INFO L85 PathProgramCache]: Analyzing trace with hash -728335542, now seen corresponding path program 110 times [2022-01-31 20:01:40,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:01:40,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [177820993] [2022-01-31 20:01:40,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:01:40,910 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:01:40,910 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:01:40,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:01:40,942 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:01:41,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:45,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:01:45,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:45,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:01:45,019 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:01:45,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [177820993] [2022-01-31 20:01:45,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [177820993] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:01:45,019 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:01:45,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [114] imperfect sequences [] total 114 [2022-01-31 20:01:45,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335906790] [2022-01-31 20:01:45,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:01:45,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2022-01-31 20:01:45,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:01:45,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2022-01-31 20:01:45,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6330, Invalid=6552, Unknown=0, NotChecked=0, Total=12882 [2022-01-31 20:01:45,022 INFO L87 Difference]: Start difference. First operand 349 states and 350 transitions. Second operand has 114 states, 114 states have (on average 2.982456140350877) internal successors, (340), 113 states have internal predecessors, (340), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:01:47,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:01:47,937 INFO L93 Difference]: Finished difference Result 921 states and 1034 transitions. [2022-01-31 20:01:47,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-01-31 20:01:47,938 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 2.982456140350877) internal successors, (340), 113 states have internal predecessors, (340), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 344 [2022-01-31 20:01:47,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:01:47,940 INFO L225 Difference]: With dead ends: 921 [2022-01-31 20:01:47,940 INFO L226 Difference]: Without dead ends: 909 [2022-01-31 20:01:47,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=6444, Invalid=6666, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 20:01:47,941 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 1881 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 1257 mSolverCounterSat, 1114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1992 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 2371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1114 IncrementalHoareTripleChecker+Valid, 1257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:01:47,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1992 Valid, 269 Invalid, 2371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1114 Valid, 1257 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 20:01:47,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2022-01-31 20:01:47,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 352. [2022-01-31 20:01:47,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 346 states have (on average 1.0057803468208093) internal successors, (348), 346 states have internal predecessors, (348), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:01:47,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 353 transitions. [2022-01-31 20:01:47,951 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 353 transitions. Word has length 344 [2022-01-31 20:01:47,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:01:47,951 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 353 transitions. [2022-01-31 20:01:47,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 2.982456140350877) internal successors, (340), 113 states have internal predecessors, (340), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:01:47,951 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 353 transitions. [2022-01-31 20:01:47,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2022-01-31 20:01:47,952 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:01:47,953 INFO L514 BasicCegarLoop]: trace histogram [111, 111, 111, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:01:47,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2022-01-31 20:01:47,953 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:01:47,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:01:47,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1591058187, now seen corresponding path program 111 times [2022-01-31 20:01:47,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:01:47,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [178170657] [2022-01-31 20:01:47,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:01:47,955 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:01:47,955 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:01:47,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:01:47,993 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:01:48,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:52,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:01:52,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:52,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:01:52,136 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:01:52,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [178170657] [2022-01-31 20:01:52,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [178170657] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:01:52,136 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:01:52,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [115] imperfect sequences [] total 115 [2022-01-31 20:01:52,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114801974] [2022-01-31 20:01:52,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:01:52,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-01-31 20:01:52,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:01:52,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-01-31 20:01:52,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6443, Invalid=6667, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 20:01:52,140 INFO L87 Difference]: Start difference. First operand 352 states and 353 transitions. Second operand has 115 states, 115 states have (on average 2.982608695652174) internal successors, (343), 114 states have internal predecessors, (343), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:01:55,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:01:55,496 INFO L93 Difference]: Finished difference Result 929 states and 1043 transitions. [2022-01-31 20:01:55,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-01-31 20:01:55,497 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 2.982608695652174) internal successors, (343), 114 states have internal predecessors, (343), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 347 [2022-01-31 20:01:55,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:01:55,498 INFO L225 Difference]: With dead ends: 929 [2022-01-31 20:01:55,498 INFO L226 Difference]: Without dead ends: 917 [2022-01-31 20:01:55,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=6558, Invalid=6782, Unknown=0, NotChecked=0, Total=13340 [2022-01-31 20:01:55,500 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 1394 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 1449 mSolverCounterSat, 786 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1506 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 2235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 786 IncrementalHoareTripleChecker+Valid, 1449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:01:55,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1506 Valid, 296 Invalid, 2235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [786 Valid, 1449 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 20:01:55,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 917 states. [2022-01-31 20:01:55,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 917 to 355. [2022-01-31 20:01:55,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 349 states have (on average 1.005730659025788) internal successors, (351), 349 states have internal predecessors, (351), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:01:55,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 356 transitions. [2022-01-31 20:01:55,511 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 356 transitions. Word has length 347 [2022-01-31 20:01:55,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:01:55,511 INFO L470 AbstractCegarLoop]: Abstraction has 355 states and 356 transitions. [2022-01-31 20:01:55,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 2.982608695652174) internal successors, (343), 114 states have internal predecessors, (343), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:01:55,511 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 356 transitions. [2022-01-31 20:01:55,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2022-01-31 20:01:55,512 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:01:55,512 INFO L514 BasicCegarLoop]: trace histogram [112, 112, 112, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:01:55,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2022-01-31 20:01:55,512 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:01:55,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:01:55,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1877076118, now seen corresponding path program 112 times [2022-01-31 20:01:55,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:01:55,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1234104969] [2022-01-31 20:01:55,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:01:55,519 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:01:55,519 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:01:55,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:01:55,558 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:01:55,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:59,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:01:59,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:59,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:01:59,767 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:01:59,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1234104969] [2022-01-31 20:01:59,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1234104969] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:01:59,767 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:01:59,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [116] imperfect sequences [] total 116 [2022-01-31 20:01:59,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575027732] [2022-01-31 20:01:59,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:01:59,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-01-31 20:01:59,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:01:59,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-01-31 20:01:59,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6557, Invalid=6783, Unknown=0, NotChecked=0, Total=13340 [2022-01-31 20:01:59,771 INFO L87 Difference]: Start difference. First operand 355 states and 356 transitions. Second operand has 116 states, 116 states have (on average 2.9827586206896552) internal successors, (346), 115 states have internal predecessors, (346), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:02:03,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:02:03,009 INFO L93 Difference]: Finished difference Result 937 states and 1052 transitions. [2022-01-31 20:02:03,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-01-31 20:02:03,009 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 2.9827586206896552) internal successors, (346), 115 states have internal predecessors, (346), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 350 [2022-01-31 20:02:03,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:02:03,011 INFO L225 Difference]: With dead ends: 937 [2022-01-31 20:02:03,011 INFO L226 Difference]: Without dead ends: 925 [2022-01-31 20:02:03,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=6673, Invalid=6899, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 20:02:03,012 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 1870 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 1383 mSolverCounterSat, 1100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1983 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 2483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1100 IncrementalHoareTripleChecker+Valid, 1383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:02:03,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1983 Valid, 268 Invalid, 2483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1100 Valid, 1383 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 20:02:03,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 925 states. [2022-01-31 20:02:03,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 925 to 358. [2022-01-31 20:02:03,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 352 states have (on average 1.0056818181818181) internal successors, (354), 352 states have internal predecessors, (354), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:02:03,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 359 transitions. [2022-01-31 20:02:03,022 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 359 transitions. Word has length 350 [2022-01-31 20:02:03,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:02:03,022 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 359 transitions. [2022-01-31 20:02:03,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 2.9827586206896552) internal successors, (346), 115 states have internal predecessors, (346), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:02:03,022 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 359 transitions. [2022-01-31 20:02:03,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2022-01-31 20:02:03,023 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:02:03,023 INFO L514 BasicCegarLoop]: trace histogram [113, 113, 113, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:02:03,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2022-01-31 20:02:03,023 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:02:03,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:02:03,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1422143275, now seen corresponding path program 113 times [2022-01-31 20:02:03,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:02:03,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [109587709] [2022-01-31 20:02:03,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:02:03,025 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:02:03,025 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:02:03,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:02:03,061 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:02:03,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:07,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:02:07,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:07,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:02:07,342 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:02:07,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [109587709] [2022-01-31 20:02:07,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [109587709] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:02:07,342 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:02:07,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [117] imperfect sequences [] total 117 [2022-01-31 20:02:07,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83259769] [2022-01-31 20:02:07,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:02:07,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-01-31 20:02:07,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:02:07,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-01-31 20:02:07,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6672, Invalid=6900, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 20:02:07,346 INFO L87 Difference]: Start difference. First operand 358 states and 359 transitions. Second operand has 117 states, 117 states have (on average 2.982905982905983) internal successors, (349), 116 states have internal predecessors, (349), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:02:10,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:02:10,892 INFO L93 Difference]: Finished difference Result 945 states and 1061 transitions. [2022-01-31 20:02:10,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-01-31 20:02:10,892 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 2.982905982905983) internal successors, (349), 116 states have internal predecessors, (349), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 353 [2022-01-31 20:02:10,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:02:10,894 INFO L225 Difference]: With dead ends: 945 [2022-01-31 20:02:10,894 INFO L226 Difference]: Without dead ends: 933 [2022-01-31 20:02:10,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=6789, Invalid=7017, Unknown=0, NotChecked=0, Total=13806 [2022-01-31 20:02:10,897 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 1728 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 1289 mSolverCounterSat, 1006 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1842 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 2295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1006 IncrementalHoareTripleChecker+Valid, 1289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:02:10,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1842 Valid, 265 Invalid, 2295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1006 Valid, 1289 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 20:02:10,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 933 states. [2022-01-31 20:02:10,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 933 to 361. [2022-01-31 20:02:10,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 355 states have (on average 1.0056338028169014) internal successors, (357), 355 states have internal predecessors, (357), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:02:10,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 362 transitions. [2022-01-31 20:02:10,907 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 362 transitions. Word has length 353 [2022-01-31 20:02:10,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:02:10,907 INFO L470 AbstractCegarLoop]: Abstraction has 361 states and 362 transitions. [2022-01-31 20:02:10,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 2.982905982905983) internal successors, (349), 116 states have internal predecessors, (349), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:02:10,907 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 362 transitions. [2022-01-31 20:02:10,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2022-01-31 20:02:10,908 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:02:10,908 INFO L514 BasicCegarLoop]: trace histogram [114, 114, 114, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:02:10,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2022-01-31 20:02:10,908 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:02:10,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:02:10,909 INFO L85 PathProgramCache]: Analyzing trace with hash 860363658, now seen corresponding path program 114 times [2022-01-31 20:02:10,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:02:10,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [704457978] [2022-01-31 20:02:10,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:02:10,910 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:02:10,910 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:02:10,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:02:10,945 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:02:11,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:15,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:02:15,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:15,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:02:15,344 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:02:15,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [704457978] [2022-01-31 20:02:15,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [704457978] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:02:15,344 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:02:15,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [118] imperfect sequences [] total 118 [2022-01-31 20:02:15,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464132595] [2022-01-31 20:02:15,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:02:15,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2022-01-31 20:02:15,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:02:15,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2022-01-31 20:02:15,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6788, Invalid=7018, Unknown=0, NotChecked=0, Total=13806 [2022-01-31 20:02:15,348 INFO L87 Difference]: Start difference. First operand 361 states and 362 transitions. Second operand has 118 states, 118 states have (on average 2.983050847457627) internal successors, (352), 117 states have internal predecessors, (352), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:02:18,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:02:18,780 INFO L93 Difference]: Finished difference Result 953 states and 1070 transitions. [2022-01-31 20:02:18,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-01-31 20:02:18,780 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 2.983050847457627) internal successors, (352), 117 states have internal predecessors, (352), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 356 [2022-01-31 20:02:18,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:02:18,781 INFO L225 Difference]: With dead ends: 953 [2022-01-31 20:02:18,782 INFO L226 Difference]: Without dead ends: 941 [2022-01-31 20:02:18,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=6906, Invalid=7136, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 20:02:18,782 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 1679 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 1329 mSolverCounterSat, 970 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1794 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 2299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 970 IncrementalHoareTripleChecker+Valid, 1329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:02:18,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1794 Valid, 282 Invalid, 2299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [970 Valid, 1329 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 20:02:18,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 941 states. [2022-01-31 20:02:18,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 941 to 364. [2022-01-31 20:02:18,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 358 states have (on average 1.005586592178771) internal successors, (360), 358 states have internal predecessors, (360), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:02:18,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 365 transitions. [2022-01-31 20:02:18,792 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 365 transitions. Word has length 356 [2022-01-31 20:02:18,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:02:18,792 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 365 transitions. [2022-01-31 20:02:18,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 2.983050847457627) internal successors, (352), 117 states have internal predecessors, (352), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:02:18,793 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 365 transitions. [2022-01-31 20:02:18,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-01-31 20:02:18,793 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:02:18,793 INFO L514 BasicCegarLoop]: trace histogram [115, 115, 115, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:02:18,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2022-01-31 20:02:18,794 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:02:18,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:02:18,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1102174389, now seen corresponding path program 115 times [2022-01-31 20:02:18,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:02:18,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [116775861] [2022-01-31 20:02:18,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:02:18,795 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:02:18,795 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:02:18,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:02:18,831 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:02:18,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:23,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:02:23,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:23,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:02:23,252 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:02:23,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [116775861] [2022-01-31 20:02:23,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [116775861] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:02:23,252 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:02:23,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [119] imperfect sequences [] total 119 [2022-01-31 20:02:23,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734159892] [2022-01-31 20:02:23,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:02:23,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-01-31 20:02:23,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:02:23,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-01-31 20:02:23,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6905, Invalid=7137, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 20:02:23,256 INFO L87 Difference]: Start difference. First operand 364 states and 365 transitions. Second operand has 119 states, 119 states have (on average 2.9831932773109244) internal successors, (355), 118 states have internal predecessors, (355), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:02:27,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:02:27,274 INFO L93 Difference]: Finished difference Result 961 states and 1079 transitions. [2022-01-31 20:02:27,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-01-31 20:02:27,274 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 2.9831932773109244) internal successors, (355), 118 states have internal predecessors, (355), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 359 [2022-01-31 20:02:27,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:02:27,276 INFO L225 Difference]: With dead ends: 961 [2022-01-31 20:02:27,276 INFO L226 Difference]: Without dead ends: 949 [2022-01-31 20:02:27,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=7024, Invalid=7256, Unknown=0, NotChecked=0, Total=14280 [2022-01-31 20:02:27,278 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 1573 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 1447 mSolverCounterSat, 897 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1689 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 2344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 897 IncrementalHoareTripleChecker+Valid, 1447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:02:27,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1689 Valid, 269 Invalid, 2344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [897 Valid, 1447 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 20:02:27,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2022-01-31 20:02:27,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 367. [2022-01-31 20:02:27,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 361 states have (on average 1.005540166204986) internal successors, (363), 361 states have internal predecessors, (363), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:02:27,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 368 transitions. [2022-01-31 20:02:27,289 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 368 transitions. Word has length 359 [2022-01-31 20:02:27,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:02:27,289 INFO L470 AbstractCegarLoop]: Abstraction has 367 states and 368 transitions. [2022-01-31 20:02:27,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 2.9831932773109244) internal successors, (355), 118 states have internal predecessors, (355), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:02:27,289 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 368 transitions. [2022-01-31 20:02:27,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2022-01-31 20:02:27,290 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:02:27,290 INFO L514 BasicCegarLoop]: trace histogram [116, 116, 116, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:02:27,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2022-01-31 20:02:27,290 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:02:27,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:02:27,290 INFO L85 PathProgramCache]: Analyzing trace with hash -2069461078, now seen corresponding path program 116 times [2022-01-31 20:02:27,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:02:27,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1443633183] [2022-01-31 20:02:27,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:02:27,292 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:02:27,292 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:02:27,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:02:27,331 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:02:27,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:31,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:02:31,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:31,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:02:31,859 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:02:31,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1443633183] [2022-01-31 20:02:31,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1443633183] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:02:31,859 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:02:31,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [120] imperfect sequences [] total 120 [2022-01-31 20:02:31,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639900408] [2022-01-31 20:02:31,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:02:31,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2022-01-31 20:02:31,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:02:31,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2022-01-31 20:02:31,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7023, Invalid=7257, Unknown=0, NotChecked=0, Total=14280 [2022-01-31 20:02:31,863 INFO L87 Difference]: Start difference. First operand 367 states and 368 transitions. Second operand has 120 states, 120 states have (on average 2.9833333333333334) internal successors, (358), 119 states have internal predecessors, (358), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:02:35,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:02:35,401 INFO L93 Difference]: Finished difference Result 969 states and 1088 transitions. [2022-01-31 20:02:35,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-01-31 20:02:35,402 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 2.9833333333333334) internal successors, (358), 119 states have internal predecessors, (358), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 362 [2022-01-31 20:02:35,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:02:35,403 INFO L225 Difference]: With dead ends: 969 [2022-01-31 20:02:35,403 INFO L226 Difference]: Without dead ends: 957 [2022-01-31 20:02:35,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=7143, Invalid=7377, Unknown=0, NotChecked=0, Total=14520 [2022-01-31 20:02:35,405 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 1860 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 1348 mSolverCounterSat, 1090 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1977 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 2438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1090 IncrementalHoareTripleChecker+Valid, 1348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:02:35,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1977 Valid, 271 Invalid, 2438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1090 Valid, 1348 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 20:02:35,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2022-01-31 20:02:35,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 370. [2022-01-31 20:02:35,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 364 states have (on average 1.0054945054945055) internal successors, (366), 364 states have internal predecessors, (366), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:02:35,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 371 transitions. [2022-01-31 20:02:35,420 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 371 transitions. Word has length 362 [2022-01-31 20:02:35,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:02:35,420 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 371 transitions. [2022-01-31 20:02:35,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 120 states have (on average 2.9833333333333334) internal successors, (358), 119 states have internal predecessors, (358), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:02:35,420 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 371 transitions. [2022-01-31 20:02:35,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2022-01-31 20:02:35,421 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:02:35,421 INFO L514 BasicCegarLoop]: trace histogram [117, 117, 117, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:02:35,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2022-01-31 20:02:35,422 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:02:35,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:02:35,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1018853525, now seen corresponding path program 117 times [2022-01-31 20:02:35,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:02:35,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1072131832] [2022-01-31 20:02:35,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:02:35,424 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:02:35,424 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:02:35,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:02:35,466 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:02:35,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:40,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:02:40,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:40,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:02:40,072 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:02:40,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1072131832] [2022-01-31 20:02:40,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1072131832] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:02:40,072 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:02:40,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [121] imperfect sequences [] total 121 [2022-01-31 20:02:40,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297846790] [2022-01-31 20:02:40,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:02:40,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2022-01-31 20:02:40,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:02:40,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2022-01-31 20:02:40,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7142, Invalid=7378, Unknown=0, NotChecked=0, Total=14520 [2022-01-31 20:02:40,076 INFO L87 Difference]: Start difference. First operand 370 states and 371 transitions. Second operand has 121 states, 121 states have (on average 2.9834710743801653) internal successors, (361), 120 states have internal predecessors, (361), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:02:44,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:02:44,108 INFO L93 Difference]: Finished difference Result 977 states and 1097 transitions. [2022-01-31 20:02:44,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-01-31 20:02:44,109 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 2.9834710743801653) internal successors, (361), 120 states have internal predecessors, (361), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 365 [2022-01-31 20:02:44,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:02:44,111 INFO L225 Difference]: With dead ends: 977 [2022-01-31 20:02:44,111 INFO L226 Difference]: Without dead ends: 965 [2022-01-31 20:02:44,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=7263, Invalid=7499, Unknown=0, NotChecked=0, Total=14762 [2022-01-31 20:02:44,113 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 2012 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 1319 mSolverCounterSat, 1192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2130 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 2511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1192 IncrementalHoareTripleChecker+Valid, 1319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:02:44,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2130 Valid, 273 Invalid, 2511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1192 Valid, 1319 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 20:02:44,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 965 states. [2022-01-31 20:02:44,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 965 to 373. [2022-01-31 20:02:44,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 367 states have (on average 1.005449591280654) internal successors, (369), 367 states have internal predecessors, (369), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:02:44,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 374 transitions. [2022-01-31 20:02:44,123 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 374 transitions. Word has length 365 [2022-01-31 20:02:44,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:02:44,124 INFO L470 AbstractCegarLoop]: Abstraction has 373 states and 374 transitions. [2022-01-31 20:02:44,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 2.9834710743801653) internal successors, (361), 120 states have internal predecessors, (361), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:02:44,124 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 374 transitions. [2022-01-31 20:02:44,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2022-01-31 20:02:44,125 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:02:44,125 INFO L514 BasicCegarLoop]: trace histogram [118, 118, 118, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:02:44,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2022-01-31 20:02:44,125 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:02:44,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:02:44,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1790223414, now seen corresponding path program 118 times [2022-01-31 20:02:44,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:02:44,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2083318205] [2022-01-31 20:02:44,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:02:44,127 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:02:44,127 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:02:44,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:02:44,161 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:02:44,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:48,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:02:48,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:48,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:02:48,832 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:02:48,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2083318205] [2022-01-31 20:02:48,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2083318205] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:02:48,832 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:02:48,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [122] imperfect sequences [] total 122 [2022-01-31 20:02:48,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411334020] [2022-01-31 20:02:48,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:02:48,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2022-01-31 20:02:48,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:02:48,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2022-01-31 20:02:48,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7262, Invalid=7500, Unknown=0, NotChecked=0, Total=14762 [2022-01-31 20:02:48,837 INFO L87 Difference]: Start difference. First operand 373 states and 374 transitions. Second operand has 122 states, 122 states have (on average 2.9836065573770494) internal successors, (364), 121 states have internal predecessors, (364), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:02:52,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:02:52,471 INFO L93 Difference]: Finished difference Result 985 states and 1106 transitions. [2022-01-31 20:02:52,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-01-31 20:02:52,472 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 2.9836065573770494) internal successors, (364), 121 states have internal predecessors, (364), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 368 [2022-01-31 20:02:52,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:02:52,473 INFO L225 Difference]: With dead ends: 985 [2022-01-31 20:02:52,473 INFO L226 Difference]: Without dead ends: 973 [2022-01-31 20:02:52,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=7384, Invalid=7622, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 20:02:52,475 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 1570 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 1377 mSolverCounterSat, 892 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1689 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 2269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 892 IncrementalHoareTripleChecker+Valid, 1377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:02:52,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1689 Valid, 280 Invalid, 2269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [892 Valid, 1377 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 20:02:52,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2022-01-31 20:02:52,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 376. [2022-01-31 20:02:52,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 370 states have (on average 1.0054054054054054) internal successors, (372), 370 states have internal predecessors, (372), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:02:52,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 377 transitions. [2022-01-31 20:02:52,490 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 377 transitions. Word has length 368 [2022-01-31 20:02:52,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:02:52,491 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 377 transitions. [2022-01-31 20:02:52,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 2.9836065573770494) internal successors, (364), 121 states have internal predecessors, (364), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:02:52,491 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 377 transitions. [2022-01-31 20:02:52,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2022-01-31 20:02:52,492 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:02:52,492 INFO L514 BasicCegarLoop]: trace histogram [119, 119, 119, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:02:52,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2022-01-31 20:02:52,492 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:02:52,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:02:52,493 INFO L85 PathProgramCache]: Analyzing trace with hash 436449397, now seen corresponding path program 119 times [2022-01-31 20:02:52,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:02:52,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2085620978] [2022-01-31 20:02:52,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:02:52,495 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:02:52,495 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:02:52,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:02:52,539 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:02:52,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:57,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:02:57,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:57,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:02:57,272 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:02:57,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2085620978] [2022-01-31 20:02:57,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2085620978] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:02:57,272 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:02:57,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [123] imperfect sequences [] total 123 [2022-01-31 20:02:57,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121008890] [2022-01-31 20:02:57,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:02:57,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-01-31 20:02:57,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:02:57,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-01-31 20:02:57,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7383, Invalid=7623, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 20:02:57,276 INFO L87 Difference]: Start difference. First operand 376 states and 377 transitions. Second operand has 123 states, 123 states have (on average 2.983739837398374) internal successors, (367), 122 states have internal predecessors, (367), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:03:01,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:03:01,388 INFO L93 Difference]: Finished difference Result 993 states and 1115 transitions. [2022-01-31 20:03:01,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-01-31 20:03:01,389 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 2.983739837398374) internal successors, (367), 122 states have internal predecessors, (367), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 371 [2022-01-31 20:03:01,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:03:01,391 INFO L225 Difference]: With dead ends: 993 [2022-01-31 20:03:01,391 INFO L226 Difference]: Without dead ends: 981 [2022-01-31 20:03:01,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=7506, Invalid=7746, Unknown=0, NotChecked=0, Total=15252 [2022-01-31 20:03:01,393 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 2121 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 1343 mSolverCounterSat, 1260 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2241 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 2603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1260 IncrementalHoareTripleChecker+Valid, 1343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:03:01,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2241 Valid, 282 Invalid, 2603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1260 Valid, 1343 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 20:03:01,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2022-01-31 20:03:01,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 379. [2022-01-31 20:03:01,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 373 states have (on average 1.0053619302949062) internal successors, (375), 373 states have internal predecessors, (375), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:03:01,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 380 transitions. [2022-01-31 20:03:01,403 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 380 transitions. Word has length 371 [2022-01-31 20:03:01,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:03:01,404 INFO L470 AbstractCegarLoop]: Abstraction has 379 states and 380 transitions. [2022-01-31 20:03:01,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 2.983739837398374) internal successors, (367), 122 states have internal predecessors, (367), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:03:01,404 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 380 transitions. [2022-01-31 20:03:01,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2022-01-31 20:03:01,405 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:03:01,405 INFO L514 BasicCegarLoop]: trace histogram [120, 120, 120, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:03:01,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2022-01-31 20:03:01,405 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:03:01,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:03:01,405 INFO L85 PathProgramCache]: Analyzing trace with hash -523724822, now seen corresponding path program 120 times [2022-01-31 20:03:01,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:03:01,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1829105777] [2022-01-31 20:03:01,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:03:01,407 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:03:01,407 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:03:01,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:03:01,442 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:03:01,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:06,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:03:06,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:06,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:03:06,262 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:03:06,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1829105777] [2022-01-31 20:03:06,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1829105777] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:03:06,262 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:03:06,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [124] imperfect sequences [] total 124 [2022-01-31 20:03:06,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785225310] [2022-01-31 20:03:06,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:03:06,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2022-01-31 20:03:06,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:03:06,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2022-01-31 20:03:06,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7505, Invalid=7747, Unknown=0, NotChecked=0, Total=15252 [2022-01-31 20:03:06,267 INFO L87 Difference]: Start difference. First operand 379 states and 380 transitions. Second operand has 124 states, 124 states have (on average 2.9838709677419355) internal successors, (370), 123 states have internal predecessors, (370), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:03:10,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:03:10,178 INFO L93 Difference]: Finished difference Result 1001 states and 1124 transitions. [2022-01-31 20:03:10,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-01-31 20:03:10,179 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 2.9838709677419355) internal successors, (370), 123 states have internal predecessors, (370), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 374 [2022-01-31 20:03:10,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:03:10,180 INFO L225 Difference]: With dead ends: 1001 [2022-01-31 20:03:10,180 INFO L226 Difference]: Without dead ends: 989 [2022-01-31 20:03:10,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=7629, Invalid=7871, Unknown=0, NotChecked=0, Total=15500 [2022-01-31 20:03:10,181 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 1577 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 1466 mSolverCounterSat, 891 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1698 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 2357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 891 IncrementalHoareTripleChecker+Valid, 1466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:03:10,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1698 Valid, 284 Invalid, 2357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [891 Valid, 1466 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 20:03:10,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 989 states. [2022-01-31 20:03:10,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 989 to 382. [2022-01-31 20:03:10,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 376 states have (on average 1.0053191489361701) internal successors, (378), 376 states have internal predecessors, (378), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:03:10,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 383 transitions. [2022-01-31 20:03:10,192 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 383 transitions. Word has length 374 [2022-01-31 20:03:10,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:03:10,193 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 383 transitions. [2022-01-31 20:03:10,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 2.9838709677419355) internal successors, (370), 123 states have internal predecessors, (370), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:03:10,193 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 383 transitions. [2022-01-31 20:03:10,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2022-01-31 20:03:10,194 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:03:10,194 INFO L514 BasicCegarLoop]: trace histogram [121, 121, 121, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:03:10,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2022-01-31 20:03:10,194 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:03:10,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:03:10,194 INFO L85 PathProgramCache]: Analyzing trace with hash -591691691, now seen corresponding path program 121 times [2022-01-31 20:03:10,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:03:10,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [412176769] [2022-01-31 20:03:10,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:03:10,196 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:03:10,196 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:03:10,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:03:10,234 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:03:10,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:15,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:03:15,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:15,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:03:15,089 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:03:15,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [412176769] [2022-01-31 20:03:15,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [412176769] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:03:15,089 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:03:15,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [125] imperfect sequences [] total 125 [2022-01-31 20:03:15,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253588378] [2022-01-31 20:03:15,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:03:15,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2022-01-31 20:03:15,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:03:15,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2022-01-31 20:03:15,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7628, Invalid=7872, Unknown=0, NotChecked=0, Total=15500 [2022-01-31 20:03:15,093 INFO L87 Difference]: Start difference. First operand 382 states and 383 transitions. Second operand has 125 states, 125 states have (on average 2.984) internal successors, (373), 124 states have internal predecessors, (373), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:03:18,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:03:18,681 INFO L93 Difference]: Finished difference Result 1009 states and 1133 transitions. [2022-01-31 20:03:18,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-01-31 20:03:18,681 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 2.984) internal successors, (373), 124 states have internal predecessors, (373), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 377 [2022-01-31 20:03:18,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:03:18,683 INFO L225 Difference]: With dead ends: 1009 [2022-01-31 20:03:18,683 INFO L226 Difference]: Without dead ends: 997 [2022-01-31 20:03:18,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=7753, Invalid=7997, Unknown=0, NotChecked=0, Total=15750 [2022-01-31 20:03:18,684 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 1552 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 1485 mSolverCounterSat, 877 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1674 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 2362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 877 IncrementalHoareTripleChecker+Valid, 1485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:03:18,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1674 Valid, 296 Invalid, 2362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [877 Valid, 1485 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 20:03:18,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2022-01-31 20:03:18,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 385. [2022-01-31 20:03:18,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 379 states have (on average 1.0052770448548813) internal successors, (381), 379 states have internal predecessors, (381), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:03:18,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 386 transitions. [2022-01-31 20:03:18,695 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 386 transitions. Word has length 377 [2022-01-31 20:03:18,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:03:18,695 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 386 transitions. [2022-01-31 20:03:18,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 2.984) internal successors, (373), 124 states have internal predecessors, (373), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:03:18,695 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 386 transitions. [2022-01-31 20:03:18,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 381 [2022-01-31 20:03:18,696 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:03:18,696 INFO L514 BasicCegarLoop]: trace histogram [122, 122, 122, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:03:18,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2022-01-31 20:03:18,696 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:03:18,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:03:18,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1831877642, now seen corresponding path program 122 times [2022-01-31 20:03:18,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:03:18,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1241325746] [2022-01-31 20:03:18,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:03:18,698 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:03:18,698 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:03:18,698 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:03:18,736 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:03:18,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:23,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:03:23,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:23,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:03:23,783 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:03:23,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1241325746] [2022-01-31 20:03:23,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1241325746] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:03:23,784 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:03:23,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [126] imperfect sequences [] total 126 [2022-01-31 20:03:23,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089121562] [2022-01-31 20:03:23,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:03:23,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2022-01-31 20:03:23,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:03:23,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2022-01-31 20:03:23,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7752, Invalid=7998, Unknown=0, NotChecked=0, Total=15750 [2022-01-31 20:03:23,788 INFO L87 Difference]: Start difference. First operand 385 states and 386 transitions. Second operand has 126 states, 126 states have (on average 2.984126984126984) internal successors, (376), 125 states have internal predecessors, (376), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:03:28,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:03:28,398 INFO L93 Difference]: Finished difference Result 1017 states and 1142 transitions. [2022-01-31 20:03:28,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-01-31 20:03:28,398 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 2.984126984126984) internal successors, (376), 125 states have internal predecessors, (376), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 380 [2022-01-31 20:03:28,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:03:28,400 INFO L225 Difference]: With dead ends: 1017 [2022-01-31 20:03:28,400 INFO L226 Difference]: Without dead ends: 1005 [2022-01-31 20:03:28,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=7878, Invalid=8124, Unknown=0, NotChecked=0, Total=16002 [2022-01-31 20:03:28,403 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 1980 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 1423 mSolverCounterSat, 1158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2103 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 2581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1158 IncrementalHoareTripleChecker+Valid, 1423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:03:28,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2103 Valid, 288 Invalid, 2581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1158 Valid, 1423 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 20:03:28,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2022-01-31 20:03:28,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 388. [2022-01-31 20:03:28,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 382 states have (on average 1.0052356020942408) internal successors, (384), 382 states have internal predecessors, (384), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:03:28,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 389 transitions. [2022-01-31 20:03:28,420 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 389 transitions. Word has length 380 [2022-01-31 20:03:28,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:03:28,420 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 389 transitions. [2022-01-31 20:03:28,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 2.984126984126984) internal successors, (376), 125 states have internal predecessors, (376), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:03:28,421 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 389 transitions. [2022-01-31 20:03:28,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2022-01-31 20:03:28,422 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:03:28,422 INFO L514 BasicCegarLoop]: trace histogram [123, 123, 123, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:03:28,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2022-01-31 20:03:28,422 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:03:28,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:03:28,423 INFO L85 PathProgramCache]: Analyzing trace with hash -309336011, now seen corresponding path program 123 times [2022-01-31 20:03:28,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:03:28,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [82472520] [2022-01-31 20:03:28,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:03:28,425 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:03:28,425 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:03:28,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:03:28,467 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:03:28,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:33,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:03:33,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:33,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:03:33,498 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:03:33,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [82472520] [2022-01-31 20:03:33,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [82472520] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:03:33,499 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:03:33,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [127] imperfect sequences [] total 127 [2022-01-31 20:03:33,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761038883] [2022-01-31 20:03:33,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:03:33,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2022-01-31 20:03:33,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:03:33,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2022-01-31 20:03:33,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7877, Invalid=8125, Unknown=0, NotChecked=0, Total=16002 [2022-01-31 20:03:33,503 INFO L87 Difference]: Start difference. First operand 388 states and 389 transitions. Second operand has 127 states, 127 states have (on average 2.984251968503937) internal successors, (379), 126 states have internal predecessors, (379), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:03:37,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:03:37,651 INFO L93 Difference]: Finished difference Result 1025 states and 1151 transitions. [2022-01-31 20:03:37,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-01-31 20:03:37,652 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 2.984251968503937) internal successors, (379), 126 states have internal predecessors, (379), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 383 [2022-01-31 20:03:37,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:03:37,653 INFO L225 Difference]: With dead ends: 1025 [2022-01-31 20:03:37,653 INFO L226 Difference]: Without dead ends: 1013 [2022-01-31 20:03:37,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=8004, Invalid=8252, Unknown=0, NotChecked=0, Total=16256 [2022-01-31 20:03:37,654 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 1553 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 1507 mSolverCounterSat, 872 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1677 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 2379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 872 IncrementalHoareTripleChecker+Valid, 1507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:03:37,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1677 Valid, 290 Invalid, 2379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [872 Valid, 1507 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 20:03:37,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2022-01-31 20:03:37,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 391. [2022-01-31 20:03:37,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 385 states have (on average 1.0051948051948052) internal successors, (387), 385 states have internal predecessors, (387), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:03:37,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 392 transitions. [2022-01-31 20:03:37,665 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 392 transitions. Word has length 383 [2022-01-31 20:03:37,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:03:37,665 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 392 transitions. [2022-01-31 20:03:37,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 127 states have (on average 2.984251968503937) internal successors, (379), 126 states have internal predecessors, (379), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:03:37,666 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 392 transitions. [2022-01-31 20:03:37,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2022-01-31 20:03:37,666 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:03:37,667 INFO L514 BasicCegarLoop]: trace histogram [124, 124, 124, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:03:37,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2022-01-31 20:03:37,667 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:03:37,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:03:37,667 INFO L85 PathProgramCache]: Analyzing trace with hash -350992342, now seen corresponding path program 124 times [2022-01-31 20:03:37,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:03:37,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [894763729] [2022-01-31 20:03:37,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:03:37,669 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:03:37,669 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:03:37,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:03:37,707 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:03:37,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:42,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:03:42,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:42,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:03:42,773 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:03:42,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [894763729] [2022-01-31 20:03:42,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [894763729] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:03:42,774 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:03:42,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [128] imperfect sequences [] total 128 [2022-01-31 20:03:42,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110934219] [2022-01-31 20:03:42,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:03:42,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-01-31 20:03:42,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:03:42,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-01-31 20:03:42,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8003, Invalid=8253, Unknown=0, NotChecked=0, Total=16256 [2022-01-31 20:03:42,778 INFO L87 Difference]: Start difference. First operand 391 states and 392 transitions. Second operand has 128 states, 128 states have (on average 2.984375) internal successors, (382), 127 states have internal predecessors, (382), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:03:47,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:03:47,460 INFO L93 Difference]: Finished difference Result 1033 states and 1160 transitions. [2022-01-31 20:03:47,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-01-31 20:03:47,461 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 2.984375) internal successors, (382), 127 states have internal predecessors, (382), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 386 [2022-01-31 20:03:47,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:03:47,463 INFO L225 Difference]: With dead ends: 1033 [2022-01-31 20:03:47,463 INFO L226 Difference]: Without dead ends: 1021 [2022-01-31 20:03:47,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=8131, Invalid=8381, Unknown=0, NotChecked=0, Total=16512 [2022-01-31 20:03:47,465 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 1855 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 1433 mSolverCounterSat, 1075 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1980 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 2508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1075 IncrementalHoareTripleChecker+Valid, 1433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:03:47,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1980 Valid, 287 Invalid, 2508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1075 Valid, 1433 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 20:03:47,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1021 states. [2022-01-31 20:03:47,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1021 to 394. [2022-01-31 20:03:47,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 388 states have (on average 1.0051546391752577) internal successors, (390), 388 states have internal predecessors, (390), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:03:47,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 395 transitions. [2022-01-31 20:03:47,477 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 395 transitions. Word has length 386 [2022-01-31 20:03:47,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:03:47,477 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 395 transitions. [2022-01-31 20:03:47,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 2.984375) internal successors, (382), 127 states have internal predecessors, (382), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:03:47,477 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 395 transitions. [2022-01-31 20:03:47,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2022-01-31 20:03:47,478 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:03:47,478 INFO L514 BasicCegarLoop]: trace histogram [125, 125, 125, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:03:47,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2022-01-31 20:03:47,478 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:03:47,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:03:47,479 INFO L85 PathProgramCache]: Analyzing trace with hash -89200619, now seen corresponding path program 125 times [2022-01-31 20:03:47,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:03:47,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2026047336] [2022-01-31 20:03:47,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:03:47,481 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:03:47,481 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:03:47,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:03:47,519 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:03:47,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:52,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:03:52,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:52,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:03:52,722 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:03:52,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2026047336] [2022-01-31 20:03:52,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2026047336] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:03:52,722 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:03:52,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [129] imperfect sequences [] total 129 [2022-01-31 20:03:52,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931853457] [2022-01-31 20:03:52,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:03:52,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2022-01-31 20:03:52,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:03:52,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2022-01-31 20:03:52,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8130, Invalid=8382, Unknown=0, NotChecked=0, Total=16512 [2022-01-31 20:03:52,727 INFO L87 Difference]: Start difference. First operand 394 states and 395 transitions. Second operand has 129 states, 129 states have (on average 2.9844961240310077) internal successors, (385), 128 states have internal predecessors, (385), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:03:56,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:03:56,845 INFO L93 Difference]: Finished difference Result 1041 states and 1169 transitions. [2022-01-31 20:03:56,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-01-31 20:03:56,845 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 2.9844961240310077) internal successors, (385), 128 states have internal predecessors, (385), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 389 [2022-01-31 20:03:56,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:03:56,847 INFO L225 Difference]: With dead ends: 1041 [2022-01-31 20:03:56,847 INFO L226 Difference]: Without dead ends: 1029 [2022-01-31 20:03:56,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=8259, Invalid=8511, Unknown=0, NotChecked=0, Total=16770 [2022-01-31 20:03:56,849 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 1893 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 1509 mSolverCounterSat, 1099 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2019 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 2608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1099 IncrementalHoareTripleChecker+Valid, 1509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:03:56,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2019 Valid, 309 Invalid, 2608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1099 Valid, 1509 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 20:03:56,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1029 states. [2022-01-31 20:03:56,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1029 to 397. [2022-01-31 20:03:56,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 391 states have (on average 1.0051150895140666) internal successors, (393), 391 states have internal predecessors, (393), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:03:56,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 398 transitions. [2022-01-31 20:03:56,867 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 398 transitions. Word has length 389 [2022-01-31 20:03:56,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:03:56,867 INFO L470 AbstractCegarLoop]: Abstraction has 397 states and 398 transitions. [2022-01-31 20:03:56,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 2.9844961240310077) internal successors, (385), 128 states have internal predecessors, (385), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:03:56,868 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 398 transitions. [2022-01-31 20:03:56,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2022-01-31 20:03:56,869 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:03:56,869 INFO L514 BasicCegarLoop]: trace histogram [126, 126, 126, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:03:56,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2022-01-31 20:03:56,869 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:03:56,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:03:56,870 INFO L85 PathProgramCache]: Analyzing trace with hash -712590262, now seen corresponding path program 126 times [2022-01-31 20:03:56,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:03:56,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [181173860] [2022-01-31 20:03:56,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:03:56,872 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:03:56,872 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:03:56,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:03:56,924 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:03:57,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:02,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:04:02,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:02,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:04:02,176 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:04:02,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [181173860] [2022-01-31 20:04:02,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [181173860] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:04:02,176 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:04:02,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [130] imperfect sequences [] total 130 [2022-01-31 20:04:02,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666903973] [2022-01-31 20:04:02,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:04:02,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-01-31 20:04:02,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:04:02,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-01-31 20:04:02,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8258, Invalid=8512, Unknown=0, NotChecked=0, Total=16770 [2022-01-31 20:04:02,181 INFO L87 Difference]: Start difference. First operand 397 states and 398 transitions. Second operand has 130 states, 130 states have (on average 2.9846153846153847) internal successors, (388), 129 states have internal predecessors, (388), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:04:07,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:04:07,183 INFO L93 Difference]: Finished difference Result 1049 states and 1178 transitions. [2022-01-31 20:04:07,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-01-31 20:04:07,184 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 130 states have (on average 2.9846153846153847) internal successors, (388), 129 states have internal predecessors, (388), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 392 [2022-01-31 20:04:07,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:04:07,185 INFO L225 Difference]: With dead ends: 1049 [2022-01-31 20:04:07,185 INFO L226 Difference]: Without dead ends: 1037 [2022-01-31 20:04:07,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=8388, Invalid=8642, Unknown=0, NotChecked=0, Total=17030 [2022-01-31 20:04:07,186 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 1901 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 1595 mSolverCounterSat, 1101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2028 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 2696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1101 IncrementalHoareTripleChecker+Valid, 1595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:04:07,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2028 Valid, 296 Invalid, 2696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1101 Valid, 1595 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 20:04:07,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2022-01-31 20:04:07,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 400. [2022-01-31 20:04:07,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 394 states have (on average 1.0050761421319796) internal successors, (396), 394 states have internal predecessors, (396), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:04:07,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 401 transitions. [2022-01-31 20:04:07,200 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 401 transitions. Word has length 392 [2022-01-31 20:04:07,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:04:07,201 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 401 transitions. [2022-01-31 20:04:07,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 2.9846153846153847) internal successors, (388), 129 states have internal predecessors, (388), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:04:07,201 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 401 transitions. [2022-01-31 20:04:07,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2022-01-31 20:04:07,202 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:04:07,202 INFO L514 BasicCegarLoop]: trace histogram [127, 127, 127, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:04:07,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2022-01-31 20:04:07,202 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:04:07,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:04:07,202 INFO L85 PathProgramCache]: Analyzing trace with hash -674856971, now seen corresponding path program 127 times [2022-01-31 20:04:07,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:04:07,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [780983873] [2022-01-31 20:04:07,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:04:07,206 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:04:07,206 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:04:07,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:04:07,251 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:04:07,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:12,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:04:12,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:12,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:04:12,578 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:04:12,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [780983873] [2022-01-31 20:04:12,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [780983873] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:04:12,579 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:04:12,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [131] imperfect sequences [] total 131 [2022-01-31 20:04:12,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871418417] [2022-01-31 20:04:12,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:04:12,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2022-01-31 20:04:12,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:04:12,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2022-01-31 20:04:12,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8387, Invalid=8643, Unknown=0, NotChecked=0, Total=17030 [2022-01-31 20:04:12,583 INFO L87 Difference]: Start difference. First operand 400 states and 401 transitions. Second operand has 131 states, 131 states have (on average 2.984732824427481) internal successors, (391), 130 states have internal predecessors, (391), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:04:18,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:04:18,078 INFO L93 Difference]: Finished difference Result 1057 states and 1187 transitions. [2022-01-31 20:04:18,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-01-31 20:04:18,078 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 2.984732824427481) internal successors, (391), 130 states have internal predecessors, (391), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 395 [2022-01-31 20:04:18,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:04:18,080 INFO L225 Difference]: With dead ends: 1057 [2022-01-31 20:04:18,080 INFO L226 Difference]: Without dead ends: 1045 [2022-01-31 20:04:18,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=8518, Invalid=8774, Unknown=0, NotChecked=0, Total=17292 [2022-01-31 20:04:18,082 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 2218 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 1626 mSolverCounterSat, 1311 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2346 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 2937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1311 IncrementalHoareTripleChecker+Valid, 1626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:04:18,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2346 Valid, 293 Invalid, 2937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1311 Valid, 1626 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 20:04:18,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1045 states. [2022-01-31 20:04:18,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1045 to 403. [2022-01-31 20:04:18,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 397 states have (on average 1.0050377833753148) internal successors, (399), 397 states have internal predecessors, (399), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:04:18,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 404 transitions. [2022-01-31 20:04:18,094 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 404 transitions. Word has length 395 [2022-01-31 20:04:18,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:04:18,094 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 404 transitions. [2022-01-31 20:04:18,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 2.984732824427481) internal successors, (391), 130 states have internal predecessors, (391), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:04:18,095 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 404 transitions. [2022-01-31 20:04:18,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 399 [2022-01-31 20:04:18,095 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:04:18,096 INFO L514 BasicCegarLoop]: trace histogram [128, 128, 128, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:04:18,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2022-01-31 20:04:18,096 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:04:18,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:04:18,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1843816342, now seen corresponding path program 128 times [2022-01-31 20:04:18,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:04:18,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [936254167] [2022-01-31 20:04:18,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:04:18,105 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:04:18,105 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:04:18,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:04:18,174 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:04:18,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:23,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:04:23,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:23,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:04:23,825 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:04:23,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [936254167] [2022-01-31 20:04:23,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [936254167] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:04:23,825 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:04:23,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [132] imperfect sequences [] total 132 [2022-01-31 20:04:23,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874905230] [2022-01-31 20:04:23,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:04:23,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2022-01-31 20:04:23,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:04:23,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2022-01-31 20:04:23,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8517, Invalid=8775, Unknown=0, NotChecked=0, Total=17292 [2022-01-31 20:04:23,830 INFO L87 Difference]: Start difference. First operand 403 states and 404 transitions. Second operand has 132 states, 132 states have (on average 2.984848484848485) internal successors, (394), 131 states have internal predecessors, (394), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:04:29,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:04:29,111 INFO L93 Difference]: Finished difference Result 1065 states and 1196 transitions. [2022-01-31 20:04:29,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-01-31 20:04:29,111 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 2.984848484848485) internal successors, (394), 131 states have internal predecessors, (394), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 398 [2022-01-31 20:04:29,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:04:29,113 INFO L225 Difference]: With dead ends: 1065 [2022-01-31 20:04:29,113 INFO L226 Difference]: Without dead ends: 1053 [2022-01-31 20:04:29,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=8649, Invalid=8907, Unknown=0, NotChecked=0, Total=17556 [2022-01-31 20:04:29,116 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 1758 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 1614 mSolverCounterSat, 1005 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1887 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 2619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1005 IncrementalHoareTripleChecker+Valid, 1614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:04:29,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1887 Valid, 320 Invalid, 2619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1005 Valid, 1614 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 20:04:29,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1053 states. [2022-01-31 20:04:29,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1053 to 406. [2022-01-31 20:04:29,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 400 states have (on average 1.005) internal successors, (402), 400 states have internal predecessors, (402), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:04:29,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 407 transitions. [2022-01-31 20:04:29,128 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 407 transitions. Word has length 398 [2022-01-31 20:04:29,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:04:29,128 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 407 transitions. [2022-01-31 20:04:29,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 132 states have (on average 2.984848484848485) internal successors, (394), 131 states have internal predecessors, (394), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:04:29,129 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 407 transitions. [2022-01-31 20:04:29,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 402 [2022-01-31 20:04:29,130 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:04:29,130 INFO L514 BasicCegarLoop]: trace histogram [129, 129, 129, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:04:29,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2022-01-31 20:04:29,130 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:04:29,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:04:29,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1577365461, now seen corresponding path program 129 times [2022-01-31 20:04:29,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:04:29,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1664889181] [2022-01-31 20:04:29,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:04:29,138 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:04:29,138 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:04:29,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:04:29,191 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:04:29,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:35,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:04:35,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:35,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:04:35,003 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:04:35,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1664889181] [2022-01-31 20:04:35,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1664889181] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:04:35,003 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:04:35,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [133] imperfect sequences [] total 133 [2022-01-31 20:04:35,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389814723] [2022-01-31 20:04:35,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:04:35,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2022-01-31 20:04:35,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:04:35,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2022-01-31 20:04:35,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8648, Invalid=8908, Unknown=0, NotChecked=0, Total=17556 [2022-01-31 20:04:35,007 INFO L87 Difference]: Start difference. First operand 406 states and 407 transitions. Second operand has 133 states, 133 states have (on average 2.9849624060150375) internal successors, (397), 132 states have internal predecessors, (397), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:04:40,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:04:40,336 INFO L93 Difference]: Finished difference Result 1073 states and 1205 transitions. [2022-01-31 20:04:40,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2022-01-31 20:04:40,337 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 133 states have (on average 2.9849624060150375) internal successors, (397), 132 states have internal predecessors, (397), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 401 [2022-01-31 20:04:40,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:04:40,339 INFO L225 Difference]: With dead ends: 1073 [2022-01-31 20:04:40,339 INFO L226 Difference]: Without dead ends: 1061 [2022-01-31 20:04:40,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=8781, Invalid=9041, Unknown=0, NotChecked=0, Total=17822 [2022-01-31 20:04:40,343 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 1817 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 1672 mSolverCounterSat, 1040 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1947 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 2712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1040 IncrementalHoareTripleChecker+Valid, 1672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:04:40,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1947 Valid, 307 Invalid, 2712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1040 Valid, 1672 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 20:04:40,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1061 states. [2022-01-31 20:04:40,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1061 to 409. [2022-01-31 20:04:40,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 403 states have (on average 1.0049627791563276) internal successors, (405), 403 states have internal predecessors, (405), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:04:40,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 410 transitions. [2022-01-31 20:04:40,355 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 410 transitions. Word has length 401 [2022-01-31 20:04:40,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:04:40,356 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 410 transitions. [2022-01-31 20:04:40,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 133 states, 133 states have (on average 2.9849624060150375) internal successors, (397), 132 states have internal predecessors, (397), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:04:40,356 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 410 transitions. [2022-01-31 20:04:40,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 405 [2022-01-31 20:04:40,357 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:04:40,357 INFO L514 BasicCegarLoop]: trace histogram [130, 130, 130, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:04:40,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2022-01-31 20:04:40,357 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:04:40,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:04:40,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1864442742, now seen corresponding path program 130 times [2022-01-31 20:04:40,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:04:40,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [866984232] [2022-01-31 20:04:40,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:04:40,359 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:04:40,359 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:04:40,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:04:40,422 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:04:40,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:46,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:04:46,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:46,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:04:46,016 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:04:46,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [866984232] [2022-01-31 20:04:46,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [866984232] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:04:46,016 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:04:46,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [134] imperfect sequences [] total 134 [2022-01-31 20:04:46,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175656507] [2022-01-31 20:04:46,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:04:46,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2022-01-31 20:04:46,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:04:46,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2022-01-31 20:04:46,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8780, Invalid=9042, Unknown=0, NotChecked=0, Total=17822 [2022-01-31 20:04:46,021 INFO L87 Difference]: Start difference. First operand 409 states and 410 transitions. Second operand has 134 states, 134 states have (on average 2.985074626865672) internal successors, (400), 133 states have internal predecessors, (400), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:04:50,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:04:50,533 INFO L93 Difference]: Finished difference Result 1081 states and 1214 transitions. [2022-01-31 20:04:50,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2022-01-31 20:04:50,533 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 2.985074626865672) internal successors, (400), 133 states have internal predecessors, (400), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 404 [2022-01-31 20:04:50,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:04:50,535 INFO L225 Difference]: With dead ends: 1081 [2022-01-31 20:04:50,535 INFO L226 Difference]: Without dead ends: 1069 [2022-01-31 20:04:50,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=8914, Invalid=9176, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 20:04:50,536 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 2014 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 1559 mSolverCounterSat, 1170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2145 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 2729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1170 IncrementalHoareTripleChecker+Valid, 1559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:04:50,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2145 Valid, 319 Invalid, 2729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1170 Valid, 1559 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 20:04:50,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1069 states. [2022-01-31 20:04:50,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1069 to 412. [2022-01-31 20:04:50,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 406 states have (on average 1.0049261083743843) internal successors, (408), 406 states have internal predecessors, (408), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:04:50,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 413 transitions. [2022-01-31 20:04:50,554 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 413 transitions. Word has length 404 [2022-01-31 20:04:50,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:04:50,554 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 413 transitions. [2022-01-31 20:04:50,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 2.985074626865672) internal successors, (400), 133 states have internal predecessors, (400), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:04:50,554 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 413 transitions. [2022-01-31 20:04:50,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2022-01-31 20:04:50,556 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:04:50,556 INFO L514 BasicCegarLoop]: trace histogram [131, 131, 131, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:04:50,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2022-01-31 20:04:50,556 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:04:50,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:04:50,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1276606389, now seen corresponding path program 131 times [2022-01-31 20:04:50,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:04:50,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [928413709] [2022-01-31 20:04:50,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:04:50,559 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:04:50,559 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:04:50,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:04:50,624 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:04:50,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:56,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:04:56,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:56,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:04:56,301 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:04:56,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [928413709] [2022-01-31 20:04:56,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [928413709] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:04:56,302 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:04:56,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [135] imperfect sequences [] total 135 [2022-01-31 20:04:56,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804595235] [2022-01-31 20:04:56,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:04:56,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2022-01-31 20:04:56,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:04:56,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2022-01-31 20:04:56,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8913, Invalid=9177, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 20:04:56,306 INFO L87 Difference]: Start difference. First operand 412 states and 413 transitions. Second operand has 135 states, 135 states have (on average 2.9851851851851854) internal successors, (403), 134 states have internal predecessors, (403), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:05:01,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:05:01,966 INFO L93 Difference]: Finished difference Result 1089 states and 1223 transitions. [2022-01-31 20:05:01,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2022-01-31 20:05:01,967 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 2.9851851851851854) internal successors, (403), 134 states have internal predecessors, (403), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 407 [2022-01-31 20:05:01,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:05:01,969 INFO L225 Difference]: With dead ends: 1089 [2022-01-31 20:05:01,969 INFO L226 Difference]: Without dead ends: 1077 [2022-01-31 20:05:01,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=9048, Invalid=9312, Unknown=0, NotChecked=0, Total=18360 [2022-01-31 20:05:01,970 INFO L933 BasicCegarLoop]: 147 mSDtfsCounter, 2175 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 1664 mSolverCounterSat, 1274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2307 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 2938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1274 IncrementalHoareTripleChecker+Valid, 1664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:05:01,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2307 Valid, 306 Invalid, 2938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1274 Valid, 1664 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 20:05:01,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1077 states. [2022-01-31 20:05:01,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1077 to 415. [2022-01-31 20:05:01,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 409 states have (on average 1.0048899755501222) internal successors, (411), 409 states have internal predecessors, (411), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:05:01,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 416 transitions. [2022-01-31 20:05:01,983 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 416 transitions. Word has length 407 [2022-01-31 20:05:01,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:05:01,983 INFO L470 AbstractCegarLoop]: Abstraction has 415 states and 416 transitions. [2022-01-31 20:05:01,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 2.9851851851851854) internal successors, (403), 134 states have internal predecessors, (403), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:05:01,983 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 416 transitions. [2022-01-31 20:05:01,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2022-01-31 20:05:01,984 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:05:01,984 INFO L514 BasicCegarLoop]: trace histogram [132, 132, 132, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:05:01,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2022-01-31 20:05:01,984 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:05:01,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:05:01,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1818790058, now seen corresponding path program 132 times [2022-01-31 20:05:01,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:05:01,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1000129168] [2022-01-31 20:05:01,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:05:01,987 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:05:01,987 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:05:01,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:05:02,036 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:05:02,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:07,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:05:07,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:07,777 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 20:05:07,778 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:05:07,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1000129168] [2022-01-31 20:05:07,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1000129168] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:05:07,778 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:05:07,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [136] imperfect sequences [] total 136 [2022-01-31 20:05:07,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922883218] [2022-01-31 20:05:07,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:05:07,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 136 states [2022-01-31 20:05:07,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:05:07,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2022-01-31 20:05:07,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9047, Invalid=9313, Unknown=0, NotChecked=0, Total=18360 [2022-01-31 20:05:07,781 INFO L87 Difference]: Start difference. First operand 415 states and 416 transitions. Second operand has 136 states, 136 states have (on average 2.985294117647059) internal successors, (406), 135 states have internal predecessors, (406), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:05:12,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:05:12,124 INFO L93 Difference]: Finished difference Result 1097 states and 1232 transitions. [2022-01-31 20:05:12,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-01-31 20:05:12,125 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 136 states have (on average 2.985294117647059) internal successors, (406), 135 states have internal predecessors, (406), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 410 [2022-01-31 20:05:12,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:05:12,127 INFO L225 Difference]: With dead ends: 1097 [2022-01-31 20:05:12,127 INFO L226 Difference]: Without dead ends: 1085 [2022-01-31 20:05:12,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=9183, Invalid=9449, Unknown=0, NotChecked=0, Total=18632 [2022-01-31 20:05:12,128 INFO L933 BasicCegarLoop]: 148 mSDtfsCounter, 2333 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 1497 mSolverCounterSat, 1383 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2466 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 2880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1383 IncrementalHoareTripleChecker+Valid, 1497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:05:12,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2466 Valid, 313 Invalid, 2880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1383 Valid, 1497 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 20:05:12,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1085 states. [2022-01-31 20:05:12,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1085 to 418. [2022-01-31 20:05:12,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 412 states have (on average 1.0048543689320388) internal successors, (414), 412 states have internal predecessors, (414), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:05:12,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 419 transitions. [2022-01-31 20:05:12,141 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 419 transitions. Word has length 410 [2022-01-31 20:05:12,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:05:12,141 INFO L470 AbstractCegarLoop]: Abstraction has 418 states and 419 transitions. [2022-01-31 20:05:12,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 136 states, 136 states have (on average 2.985294117647059) internal successors, (406), 135 states have internal predecessors, (406), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:05:12,141 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 419 transitions. [2022-01-31 20:05:12,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 414 [2022-01-31 20:05:12,142 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:05:12,142 INFO L514 BasicCegarLoop]: trace histogram [133, 133, 133, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:05:12,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2022-01-31 20:05:12,143 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:05:12,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:05:12,143 INFO L85 PathProgramCache]: Analyzing trace with hash 640472981, now seen corresponding path program 133 times [2022-01-31 20:05:12,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:05:12,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [638413858] [2022-01-31 20:05:12,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:05:12,145 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:05:12,145 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:05:12,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:05:12,202 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:05:12,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:18,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:05:18,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:18,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:05:18,116 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:05:18,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [638413858] [2022-01-31 20:05:18,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [638413858] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:05:18,116 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:05:18,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [137] imperfect sequences [] total 137 [2022-01-31 20:05:18,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576854225] [2022-01-31 20:05:18,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:05:18,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2022-01-31 20:05:18,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:05:18,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2022-01-31 20:05:18,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9182, Invalid=9450, Unknown=0, NotChecked=0, Total=18632 [2022-01-31 20:05:18,119 INFO L87 Difference]: Start difference. First operand 418 states and 419 transitions. Second operand has 137 states, 137 states have (on average 2.9854014598540144) internal successors, (409), 136 states have internal predecessors, (409), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:05:23,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:05:23,140 INFO L93 Difference]: Finished difference Result 1105 states and 1241 transitions. [2022-01-31 20:05:23,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2022-01-31 20:05:23,140 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 137 states have (on average 2.9854014598540144) internal successors, (409), 136 states have internal predecessors, (409), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 413 [2022-01-31 20:05:23,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:05:23,142 INFO L225 Difference]: With dead ends: 1105 [2022-01-31 20:05:23,142 INFO L226 Difference]: Without dead ends: 1093 [2022-01-31 20:05:23,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=9319, Invalid=9587, Unknown=0, NotChecked=0, Total=18906 [2022-01-31 20:05:23,143 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 2410 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 1577 mSolverCounterSat, 1435 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2544 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 3012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1435 IncrementalHoareTripleChecker+Valid, 1577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:05:23,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2544 Valid, 315 Invalid, 3012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1435 Valid, 1577 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 20:05:23,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1093 states. [2022-01-31 20:05:23,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1093 to 421. [2022-01-31 20:05:23,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 415 states have (on average 1.0048192771084337) internal successors, (417), 415 states have internal predecessors, (417), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:05:23,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 422 transitions. [2022-01-31 20:05:23,155 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 422 transitions. Word has length 413 [2022-01-31 20:05:23,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:05:23,155 INFO L470 AbstractCegarLoop]: Abstraction has 421 states and 422 transitions. [2022-01-31 20:05:23,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 137 states, 137 states have (on average 2.9854014598540144) internal successors, (409), 136 states have internal predecessors, (409), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:05:23,155 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 422 transitions. [2022-01-31 20:05:23,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 417 [2022-01-31 20:05:23,156 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:05:23,156 INFO L514 BasicCegarLoop]: trace histogram [134, 134, 134, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:05:23,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2022-01-31 20:05:23,157 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:05:23,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:05:23,157 INFO L85 PathProgramCache]: Analyzing trace with hash 164142282, now seen corresponding path program 134 times [2022-01-31 20:05:23,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:05:23,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [471673893] [2022-01-31 20:05:23,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:05:23,164 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:05:23,164 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:05:23,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:05:23,225 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:05:23,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:29,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:05:29,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:29,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:05:29,164 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:05:29,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [471673893] [2022-01-31 20:05:29,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [471673893] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:05:29,165 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:05:29,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [138] imperfect sequences [] total 138 [2022-01-31 20:05:29,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432809806] [2022-01-31 20:05:29,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:05:29,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 138 states [2022-01-31 20:05:29,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:05:29,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2022-01-31 20:05:29,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9318, Invalid=9588, Unknown=0, NotChecked=0, Total=18906 [2022-01-31 20:05:29,170 INFO L87 Difference]: Start difference. First operand 421 states and 422 transitions. Second operand has 138 states, 138 states have (on average 2.9855072463768115) internal successors, (412), 137 states have internal predecessors, (412), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:05:34,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:05:34,128 INFO L93 Difference]: Finished difference Result 1113 states and 1250 transitions. [2022-01-31 20:05:34,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2022-01-31 20:05:34,128 INFO L78 Accepts]: Start accepts. Automaton has has 138 states, 138 states have (on average 2.9855072463768115) internal successors, (412), 137 states have internal predecessors, (412), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 416 [2022-01-31 20:05:34,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:05:34,130 INFO L225 Difference]: With dead ends: 1113 [2022-01-31 20:05:34,130 INFO L226 Difference]: Without dead ends: 1101 [2022-01-31 20:05:34,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=9456, Invalid=9726, Unknown=0, NotChecked=0, Total=19182 [2022-01-31 20:05:34,131 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 1962 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 1622 mSolverCounterSat, 1130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2097 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 2752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1130 IncrementalHoareTripleChecker+Valid, 1622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:05:34,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2097 Valid, 312 Invalid, 2752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1130 Valid, 1622 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 20:05:34,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2022-01-31 20:05:34,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 424. [2022-01-31 20:05:34,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 418 states have (on average 1.0047846889952152) internal successors, (420), 418 states have internal predecessors, (420), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:05:34,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 425 transitions. [2022-01-31 20:05:34,143 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 425 transitions. Word has length 416 [2022-01-31 20:05:34,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:05:34,143 INFO L470 AbstractCegarLoop]: Abstraction has 424 states and 425 transitions. [2022-01-31 20:05:34,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 138 states, 138 states have (on average 2.9855072463768115) internal successors, (412), 137 states have internal predecessors, (412), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:05:34,144 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 425 transitions. [2022-01-31 20:05:34,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2022-01-31 20:05:34,144 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:05:34,145 INFO L514 BasicCegarLoop]: trace histogram [135, 135, 135, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:05:34,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2022-01-31 20:05:34,145 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:05:34,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:05:34,145 INFO L85 PathProgramCache]: Analyzing trace with hash 368234357, now seen corresponding path program 135 times [2022-01-31 20:05:34,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:05:34,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [307922911] [2022-01-31 20:05:34,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:05:34,147 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:05:34,147 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:05:34,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:05:34,196 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:05:34,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:40,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:05:40,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:40,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:05:40,231 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:05:40,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [307922911] [2022-01-31 20:05:40,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [307922911] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:05:40,231 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:05:40,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [139] imperfect sequences [] total 139 [2022-01-31 20:05:40,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533620558] [2022-01-31 20:05:40,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:05:40,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 139 states [2022-01-31 20:05:40,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:05:40,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2022-01-31 20:05:40,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9455, Invalid=9727, Unknown=0, NotChecked=0, Total=19182 [2022-01-31 20:05:40,236 INFO L87 Difference]: Start difference. First operand 424 states and 425 transitions. Second operand has 139 states, 139 states have (on average 2.985611510791367) internal successors, (415), 138 states have internal predecessors, (415), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:05:45,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:05:45,478 INFO L93 Difference]: Finished difference Result 1121 states and 1259 transitions. [2022-01-31 20:05:45,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2022-01-31 20:05:45,479 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 139 states have (on average 2.985611510791367) internal successors, (415), 138 states have internal predecessors, (415), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 419 [2022-01-31 20:05:45,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:05:45,481 INFO L225 Difference]: With dead ends: 1121 [2022-01-31 20:05:45,481 INFO L226 Difference]: Without dead ends: 1109 [2022-01-31 20:05:45,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=9594, Invalid=9866, Unknown=0, NotChecked=0, Total=19460 [2022-01-31 20:05:45,482 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 1916 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 1573 mSolverCounterSat, 1101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2052 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 2674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1101 IncrementalHoareTripleChecker+Valid, 1573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:05:45,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2052 Valid, 314 Invalid, 2674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1101 Valid, 1573 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 20:05:45,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2022-01-31 20:05:45,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 427. [2022-01-31 20:05:45,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 421 states have (on average 1.004750593824228) internal successors, (423), 421 states have internal predecessors, (423), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:05:45,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 428 transitions. [2022-01-31 20:05:45,502 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 428 transitions. Word has length 419 [2022-01-31 20:05:45,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:05:45,502 INFO L470 AbstractCegarLoop]: Abstraction has 427 states and 428 transitions. [2022-01-31 20:05:45,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 139 states, 139 states have (on average 2.985611510791367) internal successors, (415), 138 states have internal predecessors, (415), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:05:45,502 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 428 transitions. [2022-01-31 20:05:45,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2022-01-31 20:05:45,504 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:05:45,504 INFO L514 BasicCegarLoop]: trace histogram [136, 136, 136, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:05:45,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2022-01-31 20:05:45,504 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:05:45,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:05:45,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1198450454, now seen corresponding path program 136 times [2022-01-31 20:05:45,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:05:45,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1694435793] [2022-01-31 20:05:45,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:05:45,507 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:05:45,507 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:05:45,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:05:45,577 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:05:45,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:51,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:05:51,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:51,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:05:51,665 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:05:51,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1694435793] [2022-01-31 20:05:51,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1694435793] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:05:51,665 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:05:51,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [140] imperfect sequences [] total 140 [2022-01-31 20:05:51,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328576110] [2022-01-31 20:05:51,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:05:51,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2022-01-31 20:05:51,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:05:51,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2022-01-31 20:05:51,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9593, Invalid=9867, Unknown=0, NotChecked=0, Total=19460 [2022-01-31 20:05:51,670 INFO L87 Difference]: Start difference. First operand 427 states and 428 transitions. Second operand has 140 states, 140 states have (on average 2.9857142857142858) internal successors, (418), 139 states have internal predecessors, (418), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:05:57,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:05:57,342 INFO L93 Difference]: Finished difference Result 1129 states and 1268 transitions. [2022-01-31 20:05:57,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2022-01-31 20:05:57,342 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 2.9857142857142858) internal successors, (418), 139 states have internal predecessors, (418), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 422 [2022-01-31 20:05:57,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:05:57,344 INFO L225 Difference]: With dead ends: 1129 [2022-01-31 20:05:57,344 INFO L226 Difference]: Without dead ends: 1117 [2022-01-31 20:05:57,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=9733, Invalid=10007, Unknown=0, NotChecked=0, Total=19740 [2022-01-31 20:05:57,345 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 2182 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 1592 mSolverCounterSat, 1278 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2319 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 2870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1278 IncrementalHoareTripleChecker+Valid, 1592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:05:57,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2319 Valid, 316 Invalid, 2870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1278 Valid, 1592 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 20:05:57,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1117 states. [2022-01-31 20:05:57,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1117 to 430. [2022-01-31 20:05:57,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 424 states have (on average 1.0047169811320755) internal successors, (426), 424 states have internal predecessors, (426), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:05:57,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 431 transitions. [2022-01-31 20:05:57,358 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 431 transitions. Word has length 422 [2022-01-31 20:05:57,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:05:57,358 INFO L470 AbstractCegarLoop]: Abstraction has 430 states and 431 transitions. [2022-01-31 20:05:57,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 140 states have (on average 2.9857142857142858) internal successors, (418), 139 states have internal predecessors, (418), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:05:57,358 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 431 transitions. [2022-01-31 20:05:57,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2022-01-31 20:05:57,359 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:05:57,359 INFO L514 BasicCegarLoop]: trace histogram [137, 137, 137, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:05:57,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2022-01-31 20:05:57,359 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:05:57,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:05:57,359 INFO L85 PathProgramCache]: Analyzing trace with hash -896049323, now seen corresponding path program 137 times [2022-01-31 20:05:57,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:05:57,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1911301129] [2022-01-31 20:05:57,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:05:57,361 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:05:57,361 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:05:57,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:05:57,414 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:05:57,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:03,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:06:03,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:03,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:06:03,557 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:06:03,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1911301129] [2022-01-31 20:06:03,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1911301129] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:06:03,557 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:06:03,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [141] imperfect sequences [] total 141 [2022-01-31 20:06:03,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605463954] [2022-01-31 20:06:03,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:06:03,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 141 states [2022-01-31 20:06:03,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:06:03,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2022-01-31 20:06:03,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9732, Invalid=10008, Unknown=0, NotChecked=0, Total=19740 [2022-01-31 20:06:03,562 INFO L87 Difference]: Start difference. First operand 430 states and 431 transitions. Second operand has 141 states, 141 states have (on average 2.9858156028368796) internal successors, (421), 140 states have internal predecessors, (421), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:06:08,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:06:08,745 INFO L93 Difference]: Finished difference Result 1137 states and 1277 transitions. [2022-01-31 20:06:08,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2022-01-31 20:06:08,746 INFO L78 Accepts]: Start accepts. Automaton has has 141 states, 141 states have (on average 2.9858156028368796) internal successors, (421), 140 states have internal predecessors, (421), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 425 [2022-01-31 20:06:08,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:06:08,748 INFO L225 Difference]: With dead ends: 1137 [2022-01-31 20:06:08,748 INFO L226 Difference]: Without dead ends: 1125 [2022-01-31 20:06:08,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=9873, Invalid=10149, Unknown=0, NotChecked=0, Total=20022 [2022-01-31 20:06:08,749 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 2181 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 1590 mSolverCounterSat, 1276 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2319 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 2866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1276 IncrementalHoareTripleChecker+Valid, 1590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:06:08,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2319 Valid, 313 Invalid, 2866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1276 Valid, 1590 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 20:06:08,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2022-01-31 20:06:08,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 433. [2022-01-31 20:06:08,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 427 states have (on average 1.0046838407494145) internal successors, (429), 427 states have internal predecessors, (429), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:06:08,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 434 transitions. [2022-01-31 20:06:08,761 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 434 transitions. Word has length 425 [2022-01-31 20:06:08,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:06:08,761 INFO L470 AbstractCegarLoop]: Abstraction has 433 states and 434 transitions. [2022-01-31 20:06:08,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 141 states, 141 states have (on average 2.9858156028368796) internal successors, (421), 140 states have internal predecessors, (421), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:06:08,762 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 434 transitions. [2022-01-31 20:06:08,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 429 [2022-01-31 20:06:08,762 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:06:08,763 INFO L514 BasicCegarLoop]: trace histogram [138, 138, 138, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:06:08,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2022-01-31 20:06:08,763 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:06:08,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:06:08,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1389624586, now seen corresponding path program 138 times [2022-01-31 20:06:08,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:06:08,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1512160399] [2022-01-31 20:06:08,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:06:08,765 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:06:08,765 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:06:08,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:06:08,817 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:06:08,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:15,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:06:15,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:15,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:06:15,068 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:06:15,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1512160399] [2022-01-31 20:06:15,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1512160399] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:06:15,068 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:06:15,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [142] imperfect sequences [] total 142 [2022-01-31 20:06:15,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029220063] [2022-01-31 20:06:15,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:06:15,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 142 states [2022-01-31 20:06:15,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:06:15,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2022-01-31 20:06:15,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9872, Invalid=10150, Unknown=0, NotChecked=0, Total=20022 [2022-01-31 20:06:15,073 INFO L87 Difference]: Start difference. First operand 433 states and 434 transitions. Second operand has 142 states, 142 states have (on average 2.9859154929577465) internal successors, (424), 141 states have internal predecessors, (424), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:06:21,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:06:21,034 INFO L93 Difference]: Finished difference Result 1145 states and 1286 transitions. [2022-01-31 20:06:21,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2022-01-31 20:06:21,035 INFO L78 Accepts]: Start accepts. Automaton has has 142 states, 142 states have (on average 2.9859154929577465) internal successors, (424), 141 states have internal predecessors, (424), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 428 [2022-01-31 20:06:21,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:06:21,036 INFO L225 Difference]: With dead ends: 1145 [2022-01-31 20:06:21,036 INFO L226 Difference]: Without dead ends: 1133 [2022-01-31 20:06:21,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=10014, Invalid=10292, Unknown=0, NotChecked=0, Total=20306 [2022-01-31 20:06:21,038 INFO L933 BasicCegarLoop]: 154 mSDtfsCounter, 2273 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 1551 mSolverCounterSat, 1336 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2412 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 2887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1336 IncrementalHoareTripleChecker+Valid, 1551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:06:21,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2412 Valid, 310 Invalid, 2887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1336 Valid, 1551 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 20:06:21,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1133 states. [2022-01-31 20:06:21,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1133 to 436. [2022-01-31 20:06:21,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 430 states have (on average 1.0046511627906978) internal successors, (432), 430 states have internal predecessors, (432), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:06:21,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 437 transitions. [2022-01-31 20:06:21,050 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 437 transitions. Word has length 428 [2022-01-31 20:06:21,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:06:21,050 INFO L470 AbstractCegarLoop]: Abstraction has 436 states and 437 transitions. [2022-01-31 20:06:21,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 142 states, 142 states have (on average 2.9859154929577465) internal successors, (424), 141 states have internal predecessors, (424), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:06:21,050 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 437 transitions. [2022-01-31 20:06:21,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 432 [2022-01-31 20:06:21,051 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:06:21,051 INFO L514 BasicCegarLoop]: trace histogram [139, 139, 139, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:06:21,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2022-01-31 20:06:21,052 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:06:21,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:06:21,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1489536821, now seen corresponding path program 139 times [2022-01-31 20:06:21,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:06:21,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1744014993] [2022-01-31 20:06:21,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:06:21,054 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:06:21,054 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:06:21,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:06:21,105 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:06:21,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:27,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:06:27,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:27,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:06:27,395 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:06:27,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1744014993] [2022-01-31 20:06:27,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1744014993] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:06:27,395 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:06:27,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [143] imperfect sequences [] total 143 [2022-01-31 20:06:27,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745191717] [2022-01-31 20:06:27,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:06:27,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 143 states [2022-01-31 20:06:27,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:06:27,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2022-01-31 20:06:27,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10013, Invalid=10293, Unknown=0, NotChecked=0, Total=20306 [2022-01-31 20:06:27,401 INFO L87 Difference]: Start difference. First operand 436 states and 437 transitions. Second operand has 143 states, 143 states have (on average 2.986013986013986) internal successors, (427), 142 states have internal predecessors, (427), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:06:33,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:06:33,342 INFO L93 Difference]: Finished difference Result 1153 states and 1295 transitions. [2022-01-31 20:06:33,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2022-01-31 20:06:33,342 INFO L78 Accepts]: Start accepts. Automaton has has 143 states, 143 states have (on average 2.986013986013986) internal successors, (427), 142 states have internal predecessors, (427), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 431 [2022-01-31 20:06:33,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:06:33,344 INFO L225 Difference]: With dead ends: 1153 [2022-01-31 20:06:33,344 INFO L226 Difference]: Without dead ends: 1141 [2022-01-31 20:06:33,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=10156, Invalid=10436, Unknown=0, NotChecked=0, Total=20592 [2022-01-31 20:06:33,345 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 2248 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 1696 mSolverCounterSat, 1315 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2388 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 3011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1315 IncrementalHoareTripleChecker+Valid, 1696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:06:33,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2388 Valid, 337 Invalid, 3011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1315 Valid, 1696 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 20:06:33,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1141 states. [2022-01-31 20:06:33,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1141 to 439. [2022-01-31 20:06:33,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 433 states have (on average 1.0046189376443417) internal successors, (435), 433 states have internal predecessors, (435), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:06:33,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 440 transitions. [2022-01-31 20:06:33,365 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 440 transitions. Word has length 431 [2022-01-31 20:06:33,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:06:33,365 INFO L470 AbstractCegarLoop]: Abstraction has 439 states and 440 transitions. [2022-01-31 20:06:33,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 143 states, 143 states have (on average 2.986013986013986) internal successors, (427), 142 states have internal predecessors, (427), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:06:33,365 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 440 transitions. [2022-01-31 20:06:33,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2022-01-31 20:06:33,367 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:06:33,367 INFO L514 BasicCegarLoop]: trace histogram [140, 140, 140, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:06:33,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2022-01-31 20:06:33,367 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:06:33,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:06:33,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1562593578, now seen corresponding path program 140 times [2022-01-31 20:06:33,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:06:33,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [374536538] [2022-01-31 20:06:33,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:06:33,370 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:06:33,370 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:06:33,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:06:33,442 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:06:33,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:39,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:06:39,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:39,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:06:39,992 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:06:39,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [374536538] [2022-01-31 20:06:39,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [374536538] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:06:39,992 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:06:39,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [144] imperfect sequences [] total 144 [2022-01-31 20:06:39,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633938201] [2022-01-31 20:06:39,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:06:39,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 144 states [2022-01-31 20:06:39,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:06:39,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2022-01-31 20:06:39,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10155, Invalid=10437, Unknown=0, NotChecked=0, Total=20592 [2022-01-31 20:06:39,997 INFO L87 Difference]: Start difference. First operand 439 states and 440 transitions. Second operand has 144 states, 144 states have (on average 2.986111111111111) internal successors, (430), 143 states have internal predecessors, (430), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:06:45,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:06:45,901 INFO L93 Difference]: Finished difference Result 1161 states and 1304 transitions. [2022-01-31 20:06:45,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2022-01-31 20:06:45,902 INFO L78 Accepts]: Start accepts. Automaton has has 144 states, 144 states have (on average 2.986111111111111) internal successors, (430), 143 states have internal predecessors, (430), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 434 [2022-01-31 20:06:45,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:06:45,903 INFO L225 Difference]: With dead ends: 1161 [2022-01-31 20:06:45,904 INFO L226 Difference]: Without dead ends: 1149 [2022-01-31 20:06:45,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=10299, Invalid=10581, Unknown=0, NotChecked=0, Total=20880 [2022-01-31 20:06:45,905 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 1968 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 1715 mSolverCounterSat, 1130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2109 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 2845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1130 IncrementalHoareTripleChecker+Valid, 1715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:06:45,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2109 Valid, 329 Invalid, 2845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1130 Valid, 1715 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 20:06:45,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2022-01-31 20:06:45,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 442. [2022-01-31 20:06:45,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 436 states have (on average 1.0045871559633028) internal successors, (438), 436 states have internal predecessors, (438), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:06:45,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 443 transitions. [2022-01-31 20:06:45,918 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 443 transitions. Word has length 434 [2022-01-31 20:06:45,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:06:45,918 INFO L470 AbstractCegarLoop]: Abstraction has 442 states and 443 transitions. [2022-01-31 20:06:45,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 144 states, 144 states have (on average 2.986111111111111) internal successors, (430), 143 states have internal predecessors, (430), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:06:45,918 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 443 transitions. [2022-01-31 20:06:45,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2022-01-31 20:06:45,919 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:06:45,919 INFO L514 BasicCegarLoop]: trace histogram [141, 141, 141, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:06:45,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2022-01-31 20:06:45,920 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:06:45,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:06:45,920 INFO L85 PathProgramCache]: Analyzing trace with hash 448022293, now seen corresponding path program 141 times [2022-01-31 20:06:45,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:06:45,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1716520133] [2022-01-31 20:06:45,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:06:45,932 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:06:45,932 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:06:45,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:06:45,995 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:06:46,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:52,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:06:52,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:52,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:06:52,531 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:06:52,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1716520133] [2022-01-31 20:06:52,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1716520133] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:06:52,531 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:06:52,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [145] imperfect sequences [] total 145 [2022-01-31 20:06:52,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270013340] [2022-01-31 20:06:52,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:06:52,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 145 states [2022-01-31 20:06:52,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:06:52,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2022-01-31 20:06:52,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10298, Invalid=10582, Unknown=0, NotChecked=0, Total=20880 [2022-01-31 20:06:52,537 INFO L87 Difference]: Start difference. First operand 442 states and 443 transitions. Second operand has 145 states, 145 states have (on average 2.986206896551724) internal successors, (433), 144 states have internal predecessors, (433), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:06:58,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:06:58,344 INFO L93 Difference]: Finished difference Result 1169 states and 1313 transitions. [2022-01-31 20:06:58,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2022-01-31 20:06:58,345 INFO L78 Accepts]: Start accepts. Automaton has has 145 states, 145 states have (on average 2.986206896551724) internal successors, (433), 144 states have internal predecessors, (433), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 437 [2022-01-31 20:06:58,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:06:58,346 INFO L225 Difference]: With dead ends: 1169 [2022-01-31 20:06:58,346 INFO L226 Difference]: Without dead ends: 1157 [2022-01-31 20:06:58,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=10443, Invalid=10727, Unknown=0, NotChecked=0, Total=21170 [2022-01-31 20:06:58,348 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 2231 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 1574 mSolverCounterSat, 1303 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2373 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 2877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1303 IncrementalHoareTripleChecker+Valid, 1574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:06:58,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2373 Valid, 316 Invalid, 2877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1303 Valid, 1574 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 20:06:58,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1157 states. [2022-01-31 20:06:58,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1157 to 445. [2022-01-31 20:06:58,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 439 states have (on average 1.0045558086560364) internal successors, (441), 439 states have internal predecessors, (441), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:06:58,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 446 transitions. [2022-01-31 20:06:58,361 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 446 transitions. Word has length 437 [2022-01-31 20:06:58,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:06:58,362 INFO L470 AbstractCegarLoop]: Abstraction has 445 states and 446 transitions. [2022-01-31 20:06:58,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 145 states, 145 states have (on average 2.986206896551724) internal successors, (433), 144 states have internal predecessors, (433), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:06:58,362 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 446 transitions. [2022-01-31 20:06:58,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 441 [2022-01-31 20:06:58,363 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:06:58,363 INFO L514 BasicCegarLoop]: trace histogram [142, 142, 142, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:06:58,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2022-01-31 20:06:58,363 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:06:58,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:06:58,363 INFO L85 PathProgramCache]: Analyzing trace with hash 647036234, now seen corresponding path program 142 times [2022-01-31 20:06:58,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:06:58,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [789419189] [2022-01-31 20:06:58,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:06:58,365 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:06:58,365 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:06:58,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:06:58,415 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:06:58,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:05,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:07:05,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:05,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:07:05,180 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:07:05,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [789419189] [2022-01-31 20:07:05,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [789419189] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:07:05,181 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:07:05,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [146] imperfect sequences [] total 146 [2022-01-31 20:07:05,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44751477] [2022-01-31 20:07:05,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:07:05,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2022-01-31 20:07:05,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:07:05,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2022-01-31 20:07:05,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10442, Invalid=10728, Unknown=0, NotChecked=0, Total=21170 [2022-01-31 20:07:05,186 INFO L87 Difference]: Start difference. First operand 445 states and 446 transitions. Second operand has 146 states, 146 states have (on average 2.9863013698630136) internal successors, (436), 145 states have internal predecessors, (436), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:07:11,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:07:11,906 INFO L93 Difference]: Finished difference Result 1177 states and 1322 transitions. [2022-01-31 20:07:11,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2022-01-31 20:07:11,906 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 146 states have (on average 2.9863013698630136) internal successors, (436), 145 states have internal predecessors, (436), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 440 [2022-01-31 20:07:11,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:07:11,908 INFO L225 Difference]: With dead ends: 1177 [2022-01-31 20:07:11,908 INFO L226 Difference]: Without dead ends: 1165 [2022-01-31 20:07:11,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=10588, Invalid=10874, Unknown=0, NotChecked=0, Total=21462 [2022-01-31 20:07:11,909 INFO L933 BasicCegarLoop]: 158 mSDtfsCounter, 2458 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 1669 mSolverCounterSat, 1453 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2601 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 3122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1453 IncrementalHoareTripleChecker+Valid, 1669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:07:11,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2601 Valid, 338 Invalid, 3122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1453 Valid, 1669 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 20:07:11,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2022-01-31 20:07:11,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 448. [2022-01-31 20:07:11,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 442 states have (on average 1.004524886877828) internal successors, (444), 442 states have internal predecessors, (444), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:07:11,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 449 transitions. [2022-01-31 20:07:11,923 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 449 transitions. Word has length 440 [2022-01-31 20:07:11,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:07:11,923 INFO L470 AbstractCegarLoop]: Abstraction has 448 states and 449 transitions. [2022-01-31 20:07:11,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 146 states, 146 states have (on average 2.9863013698630136) internal successors, (436), 145 states have internal predecessors, (436), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:07:11,923 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 449 transitions. [2022-01-31 20:07:11,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2022-01-31 20:07:11,924 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:07:11,924 INFO L514 BasicCegarLoop]: trace histogram [143, 143, 143, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:07:11,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2022-01-31 20:07:11,925 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:07:11,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:07:11,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1878483211, now seen corresponding path program 143 times [2022-01-31 20:07:11,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:07:11,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1176365327] [2022-01-31 20:07:11,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:07:11,926 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:07:11,926 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:07:11,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:07:11,982 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:07:12,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:18,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:07:18,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:18,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:07:18,694 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:07:18,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1176365327] [2022-01-31 20:07:18,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1176365327] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:07:18,694 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:07:18,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [147] imperfect sequences [] total 147 [2022-01-31 20:07:18,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093648174] [2022-01-31 20:07:18,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:07:18,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 147 states [2022-01-31 20:07:18,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:07:18,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2022-01-31 20:07:18,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10587, Invalid=10875, Unknown=0, NotChecked=0, Total=21462 [2022-01-31 20:07:18,700 INFO L87 Difference]: Start difference. First operand 448 states and 449 transitions. Second operand has 147 states, 147 states have (on average 2.9863945578231292) internal successors, (439), 146 states have internal predecessors, (439), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:07:25,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:07:25,062 INFO L93 Difference]: Finished difference Result 1185 states and 1331 transitions. [2022-01-31 20:07:25,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2022-01-31 20:07:25,062 INFO L78 Accepts]: Start accepts. Automaton has has 147 states, 147 states have (on average 2.9863945578231292) internal successors, (439), 146 states have internal predecessors, (439), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 443 [2022-01-31 20:07:25,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:07:25,064 INFO L225 Difference]: With dead ends: 1185 [2022-01-31 20:07:25,064 INFO L226 Difference]: Without dead ends: 1173 [2022-01-31 20:07:25,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=10734, Invalid=11022, Unknown=0, NotChecked=0, Total=21756 [2022-01-31 20:07:25,065 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 2037 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 1693 mSolverCounterSat, 1170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2181 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 2863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1170 IncrementalHoareTripleChecker+Valid, 1693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:07:25,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2181 Valid, 335 Invalid, 2863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1170 Valid, 1693 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 20:07:25,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1173 states. [2022-01-31 20:07:25,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1173 to 451. [2022-01-31 20:07:25,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 445 states have (on average 1.0044943820224719) internal successors, (447), 445 states have internal predecessors, (447), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:07:25,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 452 transitions. [2022-01-31 20:07:25,078 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 452 transitions. Word has length 443 [2022-01-31 20:07:25,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:07:25,079 INFO L470 AbstractCegarLoop]: Abstraction has 451 states and 452 transitions. [2022-01-31 20:07:25,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 147 states, 147 states have (on average 2.9863945578231292) internal successors, (439), 146 states have internal predecessors, (439), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:07:25,079 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 452 transitions. [2022-01-31 20:07:25,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 447 [2022-01-31 20:07:25,080 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:07:25,080 INFO L514 BasicCegarLoop]: trace histogram [144, 144, 144, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:07:25,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2022-01-31 20:07:25,080 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:07:25,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:07:25,081 INFO L85 PathProgramCache]: Analyzing trace with hash -391177878, now seen corresponding path program 144 times [2022-01-31 20:07:25,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:07:25,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1653331177] [2022-01-31 20:07:25,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:07:25,082 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:07:25,082 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:07:25,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:07:25,136 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:07:25,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:31,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:07:31,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:31,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:07:31,949 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:07:31,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1653331177] [2022-01-31 20:07:31,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1653331177] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:07:31,950 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:07:31,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [148] imperfect sequences [] total 148 [2022-01-31 20:07:31,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020938576] [2022-01-31 20:07:31,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:07:31,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 148 states [2022-01-31 20:07:31,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:07:31,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2022-01-31 20:07:31,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10733, Invalid=11023, Unknown=0, NotChecked=0, Total=21756 [2022-01-31 20:07:31,955 INFO L87 Difference]: Start difference. First operand 451 states and 452 transitions. Second operand has 148 states, 148 states have (on average 2.9864864864864864) internal successors, (442), 147 states have internal predecessors, (442), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:07:38,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:07:38,563 INFO L93 Difference]: Finished difference Result 1193 states and 1340 transitions. [2022-01-31 20:07:38,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2022-01-31 20:07:38,563 INFO L78 Accepts]: Start accepts. Automaton has has 148 states, 148 states have (on average 2.9864864864864864) internal successors, (442), 147 states have internal predecessors, (442), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 446 [2022-01-31 20:07:38,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:07:38,565 INFO L225 Difference]: With dead ends: 1193 [2022-01-31 20:07:38,565 INFO L226 Difference]: Without dead ends: 1181 [2022-01-31 20:07:38,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=10881, Invalid=11171, Unknown=0, NotChecked=0, Total=22052 [2022-01-31 20:07:38,566 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 2813 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 1737 mSolverCounterSat, 1686 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2958 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 3423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1686 IncrementalHoareTripleChecker+Valid, 1737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-31 20:07:38,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2958 Valid, 332 Invalid, 3423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1686 Valid, 1737 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-31 20:07:38,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2022-01-31 20:07:38,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 454. [2022-01-31 20:07:38,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 448 states have (on average 1.0044642857142858) internal successors, (450), 448 states have internal predecessors, (450), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:07:38,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 455 transitions. [2022-01-31 20:07:38,581 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 455 transitions. Word has length 446 [2022-01-31 20:07:38,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:07:38,581 INFO L470 AbstractCegarLoop]: Abstraction has 454 states and 455 transitions. [2022-01-31 20:07:38,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 148 states, 148 states have (on average 2.9864864864864864) internal successors, (442), 147 states have internal predecessors, (442), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:07:38,581 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 455 transitions. [2022-01-31 20:07:38,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2022-01-31 20:07:38,582 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:07:38,583 INFO L514 BasicCegarLoop]: trace histogram [145, 145, 145, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:07:38,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2022-01-31 20:07:38,583 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:07:38,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:07:38,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1039371989, now seen corresponding path program 145 times [2022-01-31 20:07:38,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:07:38,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1215811919] [2022-01-31 20:07:38,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:07:38,585 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:07:38,585 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:07:38,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:07:38,641 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:07:38,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:45,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:07:45,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:45,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:07:45,500 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:07:45,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1215811919] [2022-01-31 20:07:45,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1215811919] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:07:45,500 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:07:45,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [149] imperfect sequences [] total 149 [2022-01-31 20:07:45,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140975684] [2022-01-31 20:07:45,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:07:45,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 149 states [2022-01-31 20:07:45,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:07:45,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2022-01-31 20:07:45,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10880, Invalid=11172, Unknown=0, NotChecked=0, Total=22052 [2022-01-31 20:07:45,506 INFO L87 Difference]: Start difference. First operand 454 states and 455 transitions. Second operand has 149 states, 149 states have (on average 2.9865771812080535) internal successors, (445), 148 states have internal predecessors, (445), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:07:52,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:07:52,348 INFO L93 Difference]: Finished difference Result 1201 states and 1349 transitions. [2022-01-31 20:07:52,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2022-01-31 20:07:52,349 INFO L78 Accepts]: Start accepts. Automaton has has 149 states, 149 states have (on average 2.9865771812080535) internal successors, (445), 148 states have internal predecessors, (445), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 449 [2022-01-31 20:07:52,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:07:52,351 INFO L225 Difference]: With dead ends: 1201 [2022-01-31 20:07:52,351 INFO L226 Difference]: Without dead ends: 1189 [2022-01-31 20:07:52,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=11029, Invalid=11321, Unknown=0, NotChecked=0, Total=22350 [2022-01-31 20:07:52,352 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 2482 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 1671 mSolverCounterSat, 1468 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2628 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 3139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1468 IncrementalHoareTripleChecker+Valid, 1671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:07:52,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2628 Valid, 319 Invalid, 3139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1468 Valid, 1671 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 20:07:52,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1189 states. [2022-01-31 20:07:52,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1189 to 457. [2022-01-31 20:07:52,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 451 states have (on average 1.0044345898004434) internal successors, (453), 451 states have internal predecessors, (453), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:07:52,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 458 transitions. [2022-01-31 20:07:52,365 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 458 transitions. Word has length 449 [2022-01-31 20:07:52,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:07:52,366 INFO L470 AbstractCegarLoop]: Abstraction has 457 states and 458 transitions. [2022-01-31 20:07:52,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 149 states, 149 states have (on average 2.9865771812080535) internal successors, (445), 148 states have internal predecessors, (445), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:07:52,366 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 458 transitions. [2022-01-31 20:07:52,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 453 [2022-01-31 20:07:52,367 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:07:52,367 INFO L514 BasicCegarLoop]: trace histogram [146, 146, 146, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:07:52,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2022-01-31 20:07:52,367 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:07:52,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:07:52,367 INFO L85 PathProgramCache]: Analyzing trace with hash -410018422, now seen corresponding path program 146 times [2022-01-31 20:07:52,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:07:52,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1684067756] [2022-01-31 20:07:52,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:07:52,369 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:07:52,369 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:07:52,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:07:52,421 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:07:52,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:59,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:07:59,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:59,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:07:59,319 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:07:59,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1684067756] [2022-01-31 20:07:59,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1684067756] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:07:59,319 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:07:59,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [150] imperfect sequences [] total 150 [2022-01-31 20:07:59,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834103337] [2022-01-31 20:07:59,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:07:59,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 150 states [2022-01-31 20:07:59,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:07:59,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2022-01-31 20:07:59,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11028, Invalid=11322, Unknown=0, NotChecked=0, Total=22350 [2022-01-31 20:07:59,325 INFO L87 Difference]: Start difference. First operand 457 states and 458 transitions. Second operand has 150 states, 150 states have (on average 2.986666666666667) internal successors, (448), 149 states have internal predecessors, (448), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:08:06,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:08:06,084 INFO L93 Difference]: Finished difference Result 1209 states and 1358 transitions. [2022-01-31 20:08:06,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2022-01-31 20:08:06,084 INFO L78 Accepts]: Start accepts. Automaton has has 150 states, 150 states have (on average 2.986666666666667) internal successors, (448), 149 states have internal predecessors, (448), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 452 [2022-01-31 20:08:06,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:08:06,086 INFO L225 Difference]: With dead ends: 1209 [2022-01-31 20:08:06,086 INFO L226 Difference]: Without dead ends: 1197 [2022-01-31 20:08:06,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=11178, Invalid=11472, Unknown=0, NotChecked=0, Total=22650 [2022-01-31 20:08:06,087 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 2064 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 1791 mSolverCounterSat, 1185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2211 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 2976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1185 IncrementalHoareTripleChecker+Valid, 1791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:08:06,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2211 Valid, 351 Invalid, 2976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1185 Valid, 1791 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 20:08:06,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1197 states. [2022-01-31 20:08:06,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1197 to 460. [2022-01-31 20:08:06,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 454 states have (on average 1.0044052863436124) internal successors, (456), 454 states have internal predecessors, (456), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:08:06,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 461 transitions. [2022-01-31 20:08:06,109 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 461 transitions. Word has length 452 [2022-01-31 20:08:06,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:08:06,109 INFO L470 AbstractCegarLoop]: Abstraction has 460 states and 461 transitions. [2022-01-31 20:08:06,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 150 states, 150 states have (on average 2.986666666666667) internal successors, (448), 149 states have internal predecessors, (448), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:08:06,109 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 461 transitions. [2022-01-31 20:08:06,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2022-01-31 20:08:06,111 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:08:06,111 INFO L514 BasicCegarLoop]: trace histogram [147, 147, 147, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:08:06,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2022-01-31 20:08:06,111 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:08:06,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:08:06,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1893525835, now seen corresponding path program 147 times [2022-01-31 20:08:06,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:08:06,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [716446189] [2022-01-31 20:08:06,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:08:06,114 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:08:06,114 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:08:06,114 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:08:06,193 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:08:06,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:13,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:08:13,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:13,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:08:13,395 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:08:13,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [716446189] [2022-01-31 20:08:13,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [716446189] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:08:13,395 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:08:13,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [151] imperfect sequences [] total 151 [2022-01-31 20:08:13,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248209940] [2022-01-31 20:08:13,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:08:13,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 151 states [2022-01-31 20:08:13,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:08:13,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2022-01-31 20:08:13,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11177, Invalid=11473, Unknown=0, NotChecked=0, Total=22650 [2022-01-31 20:08:13,401 INFO L87 Difference]: Start difference. First operand 460 states and 461 transitions. Second operand has 151 states, 151 states have (on average 2.986754966887417) internal successors, (451), 150 states have internal predecessors, (451), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:08:20,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:08:20,598 INFO L93 Difference]: Finished difference Result 1217 states and 1367 transitions. [2022-01-31 20:08:20,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2022-01-31 20:08:20,598 INFO L78 Accepts]: Start accepts. Automaton has has 151 states, 151 states have (on average 2.986754966887417) internal successors, (451), 150 states have internal predecessors, (451), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 455 [2022-01-31 20:08:20,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:08:20,600 INFO L225 Difference]: With dead ends: 1217 [2022-01-31 20:08:20,600 INFO L226 Difference]: Without dead ends: 1205 [2022-01-31 20:08:20,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=11328, Invalid=11624, Unknown=0, NotChecked=0, Total=22952 [2022-01-31 20:08:20,601 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 2438 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 1655 mSolverCounterSat, 1433 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2586 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 3088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1433 IncrementalHoareTripleChecker+Valid, 1655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:08:20,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2586 Valid, 338 Invalid, 3088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1433 Valid, 1655 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 20:08:20,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1205 states. [2022-01-31 20:08:20,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1205 to 463. [2022-01-31 20:08:20,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 457 states have (on average 1.0043763676148796) internal successors, (459), 457 states have internal predecessors, (459), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:08:20,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 464 transitions. [2022-01-31 20:08:20,615 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 464 transitions. Word has length 455 [2022-01-31 20:08:20,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:08:20,616 INFO L470 AbstractCegarLoop]: Abstraction has 463 states and 464 transitions. [2022-01-31 20:08:20,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 151 states, 151 states have (on average 2.986754966887417) internal successors, (451), 150 states have internal predecessors, (451), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:08:20,616 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 464 transitions. [2022-01-31 20:08:20,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2022-01-31 20:08:20,617 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:08:20,617 INFO L514 BasicCegarLoop]: trace histogram [148, 148, 148, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:08:20,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2022-01-31 20:08:20,617 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:08:20,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:08:20,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1849390678, now seen corresponding path program 148 times [2022-01-31 20:08:20,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:08:20,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1393150516] [2022-01-31 20:08:20,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:08:20,620 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:08:20,620 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:08:20,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:08:20,703 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:08:20,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat