/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/array-examples/standard_sentinel-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 17:58:09,474 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 17:58:09,476 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 17:58:09,520 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 17:58:09,526 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 17:58:09,527 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 17:58:09,527 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 17:58:09,528 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 17:58:09,528 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 17:58:09,529 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 17:58:09,530 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 17:58:09,531 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 17:58:09,532 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 17:58:09,540 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 17:58:09,540 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 17:58:09,541 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 17:58:09,543 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 17:58:09,547 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 17:58:09,548 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 17:58:09,548 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 17:58:09,551 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-01-31 17:58:09,561 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 17:58:09,561 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 17:58:09,563 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 17:58:09,563 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 17:58:09,563 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 17:58:09,563 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 17:58:09,563 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 17:58:09,563 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 17:58:09,563 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 17:58:09,563 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 17:58:09,564 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 17:58:09,564 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 17:58:09,564 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 17:58:09,564 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 17:58:09,564 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 17:58:09,564 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 17:58:09,564 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 17:58:09,565 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 17:58:09,565 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 17:58:09,565 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 17:58:09,565 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 17:58:09,565 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 17:58:09,565 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 17:58:09,565 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 17:58:09,763 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 17:58:09,774 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 17:58:09,776 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 17:58:09,776 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 17:58:09,777 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 17:58:09,778 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_sentinel-2.i [2022-01-31 17:58:09,833 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae58aa52d/258ece37fbb44ed1af58e8de8317ada4/FLAGa5e625b55 [2022-01-31 17:58:10,199 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 17:58:10,200 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_sentinel-2.i [2022-01-31 17:58:10,203 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae58aa52d/258ece37fbb44ed1af58e8de8317ada4/FLAGa5e625b55 [2022-01-31 17:58:10,212 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae58aa52d/258ece37fbb44ed1af58e8de8317ada4 [2022-01-31 17:58:10,215 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 17:58:10,216 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 17:58:10,217 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 17:58:10,217 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 17:58:10,219 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 17:58:10,220 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:58:10" (1/1) ... [2022-01-31 17:58:10,221 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5dc11fe9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:58:10, skipping insertion in model container [2022-01-31 17:58:10,221 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:58:10" (1/1) ... [2022-01-31 17:58:10,226 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 17:58:10,239 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 17:58:10,361 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_sentinel-2.i[852,865] [2022-01-31 17:58:10,368 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 17:58:10,372 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 17:58:10,379 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_sentinel-2.i[852,865] [2022-01-31 17:58:10,382 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 17:58:10,390 INFO L208 MainTranslator]: Completed translation [2022-01-31 17:58:10,390 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:58:10 WrapperNode [2022-01-31 17:58:10,390 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 17:58:10,391 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 17:58:10,391 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 17:58:10,391 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 17:58:10,397 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:58:10" (1/1) ... [2022-01-31 17:58:10,397 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:58:10" (1/1) ... [2022-01-31 17:58:10,401 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:58:10" (1/1) ... [2022-01-31 17:58:10,401 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:58:10" (1/1) ... [2022-01-31 17:58:10,404 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:58:10" (1/1) ... [2022-01-31 17:58:10,406 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:58:10" (1/1) ... [2022-01-31 17:58:10,407 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:58:10" (1/1) ... [2022-01-31 17:58:10,408 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 17:58:10,409 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 17:58:10,409 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 17:58:10,409 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 17:58:10,409 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:58:10" (1/1) ... [2022-01-31 17:58:10,413 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 17:58:10,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 17:58:10,438 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-31 17:58:10,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-31 17:58:10,462 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 17:58:10,462 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 17:58:10,462 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 17:58:10,462 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 17:58:10,462 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 17:58:10,462 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 17:58:10,463 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 17:58:10,463 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 17:58:10,463 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 17:58:10,463 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 17:58:10,463 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 17:58:10,463 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 17:58:10,463 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 17:58:10,463 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 17:58:10,463 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 17:58:10,463 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 17:58:10,464 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 17:58:10,464 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 17:58:10,464 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 17:58:10,464 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 17:58:10,464 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 17:58:10,528 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 17:58:10,529 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 17:58:10,660 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 17:58:10,663 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 17:58:10,664 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-31 17:58:10,665 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:58:10 BoogieIcfgContainer [2022-01-31 17:58:10,665 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 17:58:10,666 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 17:58:10,666 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 17:58:10,668 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 17:58:10,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 05:58:10" (1/3) ... [2022-01-31 17:58:10,668 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c63106d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:58:10, skipping insertion in model container [2022-01-31 17:58:10,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:58:10" (2/3) ... [2022-01-31 17:58:10,669 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c63106d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:58:10, skipping insertion in model container [2022-01-31 17:58:10,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:58:10" (3/3) ... [2022-01-31 17:58:10,680 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_sentinel-2.i [2022-01-31 17:58:10,684 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 17:58:10,684 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 17:58:10,724 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 17:58:10,732 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=JORDAN [2022-01-31 17:58:10,732 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 17:58:10,744 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 17 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:58:10,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-31 17:58:10,756 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:10,757 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:10,757 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:10,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:10,761 INFO L85 PathProgramCache]: Analyzing trace with hash 761489037, now seen corresponding path program 1 times [2022-01-31 17:58:10,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:10,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [68093516] [2022-01-31 17:58:10,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:10,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:10,811 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:10,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:10,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:10,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:10,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:10,943 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:10,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [68093516] [2022-01-31 17:58:10,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [68093516] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:10,944 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:10,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 17:58:10,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835976628] [2022-01-31 17:58:10,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:10,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 17:58:10,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:10,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 17:58:10,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 17:58:10,971 INFO L87 Difference]: Start difference. First operand has 23 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 17 states have internal predecessors, (22), 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 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:11,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:11,013 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2022-01-31 17:58:11,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 17:58:11,015 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-01-31 17:58:11,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:11,018 INFO L225 Difference]: With dead ends: 38 [2022-01-31 17:58:11,018 INFO L226 Difference]: Without dead ends: 16 [2022-01-31 17:58:11,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 17:58:11,022 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 16 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:11,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 27 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:58:11,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-01-31 17:58:11,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-01-31 17:58:11,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:11,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2022-01-31 17:58:11,058 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 13 [2022-01-31 17:58:11,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:11,058 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2022-01-31 17:58:11,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:11,059 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2022-01-31 17:58:11,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-31 17:58:11,060 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:11,060 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:11,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 17:58:11,060 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:11,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:11,061 INFO L85 PathProgramCache]: Analyzing trace with hash 38458413, now seen corresponding path program 1 times [2022-01-31 17:58:11,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:11,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1410807418] [2022-01-31 17:58:11,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:11,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:11,067 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:11,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:11,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:11,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:11,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:11,128 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:11,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1410807418] [2022-01-31 17:58:11,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1410807418] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:11,128 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:11,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 17:58:11,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448894442] [2022-01-31 17:58:11,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:11,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 17:58:11,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:11,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 17:58:11,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 17:58:11,130 INFO L87 Difference]: Start difference. First operand 16 states and 17 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 17:58:11,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:11,179 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2022-01-31 17:58:11,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 17:58:11,180 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 17:58:11,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:11,180 INFO L225 Difference]: With dead ends: 26 [2022-01-31 17:58:11,180 INFO L226 Difference]: Without dead ends: 18 [2022-01-31 17:58:11,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 17:58:11,182 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:11,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 22 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:58:11,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-01-31 17:58:11,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2022-01-31 17:58:11,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:11,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2022-01-31 17:58:11,187 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2022-01-31 17:58:11,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:11,187 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2022-01-31 17:58:11,187 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 17:58:11,187 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2022-01-31 17:58:11,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-31 17:58:11,187 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:11,188 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:11,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 17:58:11,188 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:11,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:11,188 INFO L85 PathProgramCache]: Analyzing trace with hash 380179919, now seen corresponding path program 1 times [2022-01-31 17:58:11,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:11,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [138948255] [2022-01-31 17:58:11,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:11,199 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:11,199 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:11,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:11,200 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:11,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:11,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:11,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:11,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:11,236 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:11,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [138948255] [2022-01-31 17:58:11,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [138948255] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:11,236 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:11,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 17:58:11,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952099960] [2022-01-31 17:58:11,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:11,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 17:58:11,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:11,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 17:58:11,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 17:58:11,238 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:11,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:11,274 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2022-01-31 17:58:11,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 17:58:11,275 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-01-31 17:58:11,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:11,275 INFO L225 Difference]: With dead ends: 28 [2022-01-31 17:58:11,275 INFO L226 Difference]: Without dead ends: 20 [2022-01-31 17:58:11,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-31 17:58:11,276 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 15 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:11,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 27 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:58:11,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-01-31 17:58:11,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2022-01-31 17:58:11,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:11,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2022-01-31 17:58:11,280 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 16 [2022-01-31 17:58:11,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:11,281 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2022-01-31 17:58:11,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:11,282 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2022-01-31 17:58:11,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-31 17:58:11,283 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:11,283 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:11,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 17:58:11,283 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:11,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:11,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1937934607, now seen corresponding path program 2 times [2022-01-31 17:58:11,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:11,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [523016726] [2022-01-31 17:58:11,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:11,291 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:11,291 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:11,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:11,292 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:11,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:11,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:11,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:11,384 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 17:58:11,385 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:11,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [523016726] [2022-01-31 17:58:11,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [523016726] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:11,385 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:11,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 17:58:11,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339312474] [2022-01-31 17:58:11,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:11,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 17:58:11,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:11,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 17:58:11,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-31 17:58:11,387 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:11,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:11,467 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2022-01-31 17:58:11,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 17:58:11,467 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-01-31 17:58:11,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:11,469 INFO L225 Difference]: With dead ends: 26 [2022-01-31 17:58:11,469 INFO L226 Difference]: Without dead ends: 21 [2022-01-31 17:58:11,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-31 17:58:11,477 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 15 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:11,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 31 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:58:11,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-01-31 17:58:11,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-01-31 17:58:11,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 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), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:11,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2022-01-31 17:58:11,481 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2022-01-31 17:58:11,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:11,482 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2022-01-31 17:58:11,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:11,482 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2022-01-31 17:58:11,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-31 17:58:11,482 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:11,482 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 17:58:11,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 17:58:11,485 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:11,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:11,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1762279178, now seen corresponding path program 1 times [2022-01-31 17:58:11,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:11,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1257909100] [2022-01-31 17:58:11,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:11,492 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:11,492 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:11,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:11,493 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:11,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:11,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:11,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:11,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:11,549 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:11,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1257909100] [2022-01-31 17:58:11,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1257909100] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:11,550 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:11,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 17:58:11,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717395820] [2022-01-31 17:58:11,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:11,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 17:58:11,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:11,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 17:58:11,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 17:58:11,551 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:11,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:11,630 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2022-01-31 17:58:11,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 17:58:11,630 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-01-31 17:58:11,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:11,631 INFO L225 Difference]: With dead ends: 34 [2022-01-31 17:58:11,631 INFO L226 Difference]: Without dead ends: 24 [2022-01-31 17:58:11,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-31 17:58:11,632 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 17 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:11,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 32 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:58:11,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-01-31 17:58:11,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2022-01-31 17:58:11,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:11,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2022-01-31 17:58:11,638 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2022-01-31 17:58:11,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:11,639 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2022-01-31 17:58:11,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:11,639 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2022-01-31 17:58:11,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 17:58:11,639 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:11,639 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:11,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 17:58:11,640 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:11,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:11,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1536213272, now seen corresponding path program 2 times [2022-01-31 17:58:11,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:11,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [185551305] [2022-01-31 17:58:11,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:11,642 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:11,642 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:11,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:11,647 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:11,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:11,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:11,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:11,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:11,709 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:11,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [185551305] [2022-01-31 17:58:11,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [185551305] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:11,710 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:11,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 17:58:11,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001514152] [2022-01-31 17:58:11,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:11,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 17:58:11,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:11,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 17:58:11,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-31 17:58:11,712 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:11,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:11,780 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2022-01-31 17:58:11,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 17:58:11,781 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-01-31 17:58:11,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:11,781 INFO L225 Difference]: With dead ends: 36 [2022-01-31 17:58:11,781 INFO L226 Difference]: Without dead ends: 26 [2022-01-31 17:58:11,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-01-31 17:58:11,786 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 19 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:11,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 27 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:58:11,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-01-31 17:58:11,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2022-01-31 17:58:11,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:11,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2022-01-31 17:58:11,800 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 22 [2022-01-31 17:58:11,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:11,800 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2022-01-31 17:58:11,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:11,801 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2022-01-31 17:58:11,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-31 17:58:11,802 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:11,802 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:11,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 17:58:11,802 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:11,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:11,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1701593274, now seen corresponding path program 3 times [2022-01-31 17:58:11,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:11,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1111761345] [2022-01-31 17:58:11,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:11,810 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:11,810 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:11,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:11,811 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:11,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:11,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:11,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:11,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:11,881 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:11,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1111761345] [2022-01-31 17:58:11,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1111761345] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:11,881 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:11,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 17:58:11,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150829429] [2022-01-31 17:58:11,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:11,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 17:58:11,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:11,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 17:58:11,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 17:58:11,882 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:11,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:11,958 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2022-01-31 17:58:11,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 17:58:11,959 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 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 24 [2022-01-31 17:58:11,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:11,961 INFO L225 Difference]: With dead ends: 38 [2022-01-31 17:58:11,961 INFO L226 Difference]: Without dead ends: 28 [2022-01-31 17:58:11,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2022-01-31 17:58:11,961 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 21 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:11,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 27 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:58:11,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-01-31 17:58:11,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-01-31 17:58:11,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 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), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:11,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2022-01-31 17:58:11,968 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2022-01-31 17:58:11,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:11,969 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2022-01-31 17:58:11,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:11,969 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2022-01-31 17:58:11,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-31 17:58:11,969 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:11,969 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:11,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 17:58:11,970 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:11,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:11,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1717985244, now seen corresponding path program 4 times [2022-01-31 17:58:11,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:11,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1173687047] [2022-01-31 17:58:11,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:11,972 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:11,972 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:11,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:11,973 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:11,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:12,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:12,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:12,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:12,060 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:12,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1173687047] [2022-01-31 17:58:12,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1173687047] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:12,061 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:12,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 17:58:12,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513211593] [2022-01-31 17:58:12,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:12,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 17:58:12,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:12,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 17:58:12,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-31 17:58:12,064 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:12,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:12,136 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2022-01-31 17:58:12,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 17:58:12,137 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-01-31 17:58:12,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:12,137 INFO L225 Difference]: With dead ends: 40 [2022-01-31 17:58:12,137 INFO L226 Difference]: Without dead ends: 30 [2022-01-31 17:58:12,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2022-01-31 17:58:12,138 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 23 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:12,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 27 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:58:12,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-01-31 17:58:12,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2022-01-31 17:58:12,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:12,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2022-01-31 17:58:12,143 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2022-01-31 17:58:12,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:12,143 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2022-01-31 17:58:12,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:12,143 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2022-01-31 17:58:12,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 17:58:12,143 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:12,143 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:12,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 17:58:12,144 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:12,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:12,144 INFO L85 PathProgramCache]: Analyzing trace with hash 290799230, now seen corresponding path program 5 times [2022-01-31 17:58:12,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:12,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [305023748] [2022-01-31 17:58:12,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:12,146 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:12,146 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:12,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:12,147 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:12,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:12,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:12,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:12,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:12,208 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:12,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [305023748] [2022-01-31 17:58:12,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [305023748] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:12,208 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:12,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 17:58:12,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309168423] [2022-01-31 17:58:12,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:12,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 17:58:12,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:12,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 17:58:12,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-01-31 17:58:12,209 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:12,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:12,303 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2022-01-31 17:58:12,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 17:58:12,304 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-01-31 17:58:12,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:12,304 INFO L225 Difference]: With dead ends: 42 [2022-01-31 17:58:12,304 INFO L226 Difference]: Without dead ends: 32 [2022-01-31 17:58:12,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2022-01-31 17:58:12,305 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 25 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:12,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 42 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:58:12,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-01-31 17:58:12,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2022-01-31 17:58:12,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:12,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2022-01-31 17:58:12,309 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 28 [2022-01-31 17:58:12,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:12,309 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2022-01-31 17:58:12,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:12,309 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2022-01-31 17:58:12,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 17:58:12,309 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:12,310 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:12,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 17:58:12,310 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:12,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:12,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1140392800, now seen corresponding path program 6 times [2022-01-31 17:58:12,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:12,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1456606763] [2022-01-31 17:58:12,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:12,312 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:12,312 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:12,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:12,313 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:12,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:12,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:12,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:12,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:12,381 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:12,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1456606763] [2022-01-31 17:58:12,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1456606763] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:12,382 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:12,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 17:58:12,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440999782] [2022-01-31 17:58:12,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:12,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 17:58:12,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:12,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 17:58:12,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2022-01-31 17:58:12,382 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:12,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:12,485 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2022-01-31 17:58:12,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 17:58:12,485 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-01-31 17:58:12,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:12,486 INFO L225 Difference]: With dead ends: 44 [2022-01-31 17:58:12,486 INFO L226 Difference]: Without dead ends: 34 [2022-01-31 17:58:12,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2022-01-31 17:58:12,487 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 27 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:12,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 32 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:58:12,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-01-31 17:58:12,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2022-01-31 17:58:12,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 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), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:12,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2022-01-31 17:58:12,491 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 30 [2022-01-31 17:58:12,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:12,492 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2022-01-31 17:58:12,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:12,492 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2022-01-31 17:58:12,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 17:58:12,492 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:12,492 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:12,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 17:58:12,492 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:12,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:12,493 INFO L85 PathProgramCache]: Analyzing trace with hash -2126398910, now seen corresponding path program 7 times [2022-01-31 17:58:12,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:12,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1243670388] [2022-01-31 17:58:12,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:12,494 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:12,495 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:12,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:12,495 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:12,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:12,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:12,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:12,575 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 17:58:12,575 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:12,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1243670388] [2022-01-31 17:58:12,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1243670388] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:12,575 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:12,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 17:58:12,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4812185] [2022-01-31 17:58:12,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:12,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 17:58:12,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:12,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 17:58:12,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-01-31 17:58:12,576 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:12,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:12,699 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2022-01-31 17:58:12,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 17:58:12,699 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-01-31 17:58:12,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:12,700 INFO L225 Difference]: With dead ends: 46 [2022-01-31 17:58:12,700 INFO L226 Difference]: Without dead ends: 36 [2022-01-31 17:58:12,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2022-01-31 17:58:12,700 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 29 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:12,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 32 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:58:12,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-01-31 17:58:12,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2022-01-31 17:58:12,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 30 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:12,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2022-01-31 17:58:12,705 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2022-01-31 17:58:12,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:12,705 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2022-01-31 17:58:12,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:12,705 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2022-01-31 17:58:12,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-31 17:58:12,705 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:12,705 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:12,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 17:58:12,706 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:12,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:12,706 INFO L85 PathProgramCache]: Analyzing trace with hash -490498204, now seen corresponding path program 8 times [2022-01-31 17:58:12,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:12,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1535356133] [2022-01-31 17:58:12,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:12,707 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:12,708 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:12,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:12,708 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:12,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:12,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:12,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:12,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:12,793 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:12,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1535356133] [2022-01-31 17:58:12,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1535356133] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:12,793 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:12,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 17:58:12,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683366068] [2022-01-31 17:58:12,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:12,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 17:58:12,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:12,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 17:58:12,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2022-01-31 17:58:12,795 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:12,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:12,906 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2022-01-31 17:58:12,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 17:58:12,906 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-01-31 17:58:12,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:12,907 INFO L225 Difference]: With dead ends: 48 [2022-01-31 17:58:12,907 INFO L226 Difference]: Without dead ends: 38 [2022-01-31 17:58:12,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2022-01-31 17:58:12,908 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 31 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:12,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 32 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:58:12,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-01-31 17:58:12,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2022-01-31 17:58:12,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:12,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2022-01-31 17:58:12,912 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2022-01-31 17:58:12,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:12,912 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2022-01-31 17:58:12,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:12,913 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2022-01-31 17:58:12,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-31 17:58:12,913 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:12,913 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:12,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-31 17:58:12,913 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:12,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:12,913 INFO L85 PathProgramCache]: Analyzing trace with hash -347950074, now seen corresponding path program 9 times [2022-01-31 17:58:12,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:12,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [41186497] [2022-01-31 17:58:12,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:12,915 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:12,915 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:12,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:12,916 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:12,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:13,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:13,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:13,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:13,010 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:13,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [41186497] [2022-01-31 17:58:13,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [41186497] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:13,010 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:13,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 17:58:13,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296455847] [2022-01-31 17:58:13,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:13,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 17:58:13,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:13,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 17:58:13,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-01-31 17:58:13,012 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:13,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:13,140 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2022-01-31 17:58:13,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 17:58:13,141 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 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 36 [2022-01-31 17:58:13,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:13,141 INFO L225 Difference]: With dead ends: 50 [2022-01-31 17:58:13,141 INFO L226 Difference]: Without dead ends: 40 [2022-01-31 17:58:13,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2022-01-31 17:58:13,142 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:13,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 32 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:58:13,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-01-31 17:58:13,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2022-01-31 17:58:13,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 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), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:13,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2022-01-31 17:58:13,149 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 36 [2022-01-31 17:58:13,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:13,149 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2022-01-31 17:58:13,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:13,149 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2022-01-31 17:58:13,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-31 17:58:13,150 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:13,150 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:13,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 17:58:13,150 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:13,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:13,150 INFO L85 PathProgramCache]: Analyzing trace with hash -798150616, now seen corresponding path program 10 times [2022-01-31 17:58:13,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:13,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1573110301] [2022-01-31 17:58:13,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:13,152 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:13,152 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:13,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:13,153 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:13,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:13,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:13,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:13,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:13,258 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:13,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1573110301] [2022-01-31 17:58:13,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1573110301] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:13,258 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:13,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 17:58:13,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915390652] [2022-01-31 17:58:13,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:13,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 17:58:13,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:13,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 17:58:13,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2022-01-31 17:58:13,259 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:13,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:13,393 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2022-01-31 17:58:13,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 17:58:13,393 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-01-31 17:58:13,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:13,394 INFO L225 Difference]: With dead ends: 52 [2022-01-31 17:58:13,394 INFO L226 Difference]: Without dead ends: 42 [2022-01-31 17:58:13,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2022-01-31 17:58:13,394 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 35 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:13,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 42 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:58:13,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-01-31 17:58:13,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2022-01-31 17:58:13,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:13,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2022-01-31 17:58:13,399 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 38 [2022-01-31 17:58:13,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:13,399 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2022-01-31 17:58:13,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:13,399 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2022-01-31 17:58:13,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-31 17:58:13,399 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:13,399 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:13,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-31 17:58:13,400 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:13,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:13,400 INFO L85 PathProgramCache]: Analyzing trace with hash 350825418, now seen corresponding path program 11 times [2022-01-31 17:58:13,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:13,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [451727241] [2022-01-31 17:58:13,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:13,401 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:13,402 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:13,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:13,402 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:13,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:13,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:13,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:13,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:13,515 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:13,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [451727241] [2022-01-31 17:58:13,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [451727241] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:13,515 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:13,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 17:58:13,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432063166] [2022-01-31 17:58:13,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:13,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 17:58:13,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:13,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 17:58:13,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2022-01-31 17:58:13,516 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:13,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:13,666 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2022-01-31 17:58:13,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 17:58:13,666 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-01-31 17:58:13,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:13,667 INFO L225 Difference]: With dead ends: 54 [2022-01-31 17:58:13,667 INFO L226 Difference]: Without dead ends: 44 [2022-01-31 17:58:13,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=315, Invalid=497, Unknown=0, NotChecked=0, Total=812 [2022-01-31 17:58:13,668 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 37 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:13,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 37 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:58:13,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-01-31 17:58:13,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2022-01-31 17:58:13,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 38 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:13,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2022-01-31 17:58:13,673 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 40 [2022-01-31 17:58:13,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:13,673 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2022-01-31 17:58:13,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:13,673 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2022-01-31 17:58:13,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-31 17:58:13,674 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:13,674 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:13,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-31 17:58:13,674 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:13,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:13,674 INFO L85 PathProgramCache]: Analyzing trace with hash 710199020, now seen corresponding path program 12 times [2022-01-31 17:58:13,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:13,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1674559671] [2022-01-31 17:58:13,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:13,676 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:13,676 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:13,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:13,677 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:13,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:13,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:13,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:13,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:13,812 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:13,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1674559671] [2022-01-31 17:58:13,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1674559671] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:13,812 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:13,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 17:58:13,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755955734] [2022-01-31 17:58:13,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:13,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 17:58:13,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:13,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 17:58:13,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2022-01-31 17:58:13,813 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:13,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:13,988 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2022-01-31 17:58:13,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 17:58:13,988 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 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 42 [2022-01-31 17:58:13,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:13,988 INFO L225 Difference]: With dead ends: 56 [2022-01-31 17:58:13,988 INFO L226 Difference]: Without dead ends: 46 [2022-01-31 17:58:13,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2022-01-31 17:58:13,989 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 39 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:13,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 32 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:58:13,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-01-31 17:58:13,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2022-01-31 17:58:13,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 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), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:13,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2022-01-31 17:58:13,994 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 42 [2022-01-31 17:58:13,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:13,994 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2022-01-31 17:58:13,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:13,994 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2022-01-31 17:58:13,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-31 17:58:13,995 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:13,995 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:13,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-31 17:58:13,995 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:13,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:13,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1824120434, now seen corresponding path program 13 times [2022-01-31 17:58:13,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:13,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1398690999] [2022-01-31 17:58:13,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:13,997 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:13,997 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:13,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:13,998 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:14,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:14,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:14,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:14,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:14,146 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:14,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1398690999] [2022-01-31 17:58:14,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1398690999] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:14,146 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:14,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 17:58:14,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079187222] [2022-01-31 17:58:14,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:14,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 17:58:14,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:14,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 17:58:14,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-01-31 17:58:14,147 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:14,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:14,319 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2022-01-31 17:58:14,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 17:58:14,319 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-01-31 17:58:14,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:14,319 INFO L225 Difference]: With dead ends: 58 [2022-01-31 17:58:14,319 INFO L226 Difference]: Without dead ends: 48 [2022-01-31 17:58:14,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=408, Invalid=648, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 17:58:14,320 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 41 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:14,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 37 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:58:14,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-01-31 17:58:14,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2022-01-31 17:58:14,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 42 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:14,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2022-01-31 17:58:14,325 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 44 [2022-01-31 17:58:14,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:14,325 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2022-01-31 17:58:14,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:14,326 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2022-01-31 17:58:14,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-31 17:58:14,326 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:14,326 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:14,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-31 17:58:14,326 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:14,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:14,326 INFO L85 PathProgramCache]: Analyzing trace with hash -2058658896, now seen corresponding path program 14 times [2022-01-31 17:58:14,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:14,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [492595184] [2022-01-31 17:58:14,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:14,328 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:14,328 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:14,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:14,329 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:14,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:14,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:14,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:14,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:14,469 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:14,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [492595184] [2022-01-31 17:58:14,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [492595184] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:14,469 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:14,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 17:58:14,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765123562] [2022-01-31 17:58:14,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:14,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 17:58:14,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:14,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 17:58:14,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2022-01-31 17:58:14,470 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:14,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:14,656 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2022-01-31 17:58:14,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 17:58:14,657 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-01-31 17:58:14,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:14,657 INFO L225 Difference]: With dead ends: 60 [2022-01-31 17:58:14,657 INFO L226 Difference]: Without dead ends: 50 [2022-01-31 17:58:14,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 17:58:14,658 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 43 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:14,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 42 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:58:14,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-01-31 17:58:14,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2022-01-31 17:58:14,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:14,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2022-01-31 17:58:14,663 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 46 [2022-01-31 17:58:14,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:14,663 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2022-01-31 17:58:14,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:14,663 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2022-01-31 17:58:14,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-31 17:58:14,663 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:14,664 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:14,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-31 17:58:14,664 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:14,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:14,664 INFO L85 PathProgramCache]: Analyzing trace with hash 183145810, now seen corresponding path program 15 times [2022-01-31 17:58:14,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:14,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1238957416] [2022-01-31 17:58:14,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:14,666 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:14,666 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:14,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:14,667 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:14,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:14,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:14,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:14,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:14,813 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:14,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1238957416] [2022-01-31 17:58:14,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1238957416] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:14,813 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:14,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 17:58:14,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075283699] [2022-01-31 17:58:14,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:14,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 17:58:14,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:14,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 17:58:14,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2022-01-31 17:58:14,814 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:15,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:15,002 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2022-01-31 17:58:15,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 17:58:15,003 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 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 48 [2022-01-31 17:58:15,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:15,003 INFO L225 Difference]: With dead ends: 62 [2022-01-31 17:58:15,003 INFO L226 Difference]: Without dead ends: 52 [2022-01-31 17:58:15,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=513, Invalid=819, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 17:58:15,004 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 45 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:15,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 42 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:58:15,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-01-31 17:58:15,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2022-01-31 17:58:15,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 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), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:15,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2022-01-31 17:58:15,010 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 48 [2022-01-31 17:58:15,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:15,010 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2022-01-31 17:58:15,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:15,010 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2022-01-31 17:58:15,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-31 17:58:15,010 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:15,010 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:15,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-31 17:58:15,011 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:15,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:15,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1516114316, now seen corresponding path program 16 times [2022-01-31 17:58:15,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:15,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1326027801] [2022-01-31 17:58:15,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:15,012 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:15,013 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:15,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:15,013 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:15,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:15,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:15,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:15,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:15,175 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:15,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1326027801] [2022-01-31 17:58:15,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1326027801] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:15,176 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:15,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 17:58:15,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921733583] [2022-01-31 17:58:15,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:15,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 17:58:15,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:15,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 17:58:15,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2022-01-31 17:58:15,177 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:15,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:15,407 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2022-01-31 17:58:15,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 17:58:15,408 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-01-31 17:58:15,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:15,408 INFO L225 Difference]: With dead ends: 64 [2022-01-31 17:58:15,408 INFO L226 Difference]: Without dead ends: 54 [2022-01-31 17:58:15,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=570, Invalid=912, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 17:58:15,409 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 47 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:15,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 27 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:58:15,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-01-31 17:58:15,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2022-01-31 17:58:15,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 48 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:15,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2022-01-31 17:58:15,414 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2022-01-31 17:58:15,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:15,414 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2022-01-31 17:58:15,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:15,414 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2022-01-31 17:58:15,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-31 17:58:15,415 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:15,415 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:15,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-31 17:58:15,415 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:15,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:15,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1877444374, now seen corresponding path program 17 times [2022-01-31 17:58:15,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:15,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [580505590] [2022-01-31 17:58:15,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:15,417 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:15,417 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:15,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:15,418 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:15,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:15,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:15,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:15,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:15,594 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:15,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [580505590] [2022-01-31 17:58:15,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [580505590] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:15,594 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:15,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 17:58:15,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914255155] [2022-01-31 17:58:15,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:15,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 17:58:15,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:15,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 17:58:15,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2022-01-31 17:58:15,595 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 21 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:15,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:15,823 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2022-01-31 17:58:15,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 17:58:15,823 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 21 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-01-31 17:58:15,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:15,823 INFO L225 Difference]: With dead ends: 66 [2022-01-31 17:58:15,823 INFO L226 Difference]: Without dead ends: 56 [2022-01-31 17:58:15,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 17:58:15,824 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 49 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:15,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 37 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:58:15,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-01-31 17:58:15,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2022-01-31 17:58:15,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.04) internal successors, (52), 50 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:15,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2022-01-31 17:58:15,829 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 52 [2022-01-31 17:58:15,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:15,829 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2022-01-31 17:58:15,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 21 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:15,829 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2022-01-31 17:58:15,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-31 17:58:15,830 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:15,830 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:15,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-31 17:58:15,830 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:15,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:15,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1087799496, now seen corresponding path program 18 times [2022-01-31 17:58:15,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:15,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [205480097] [2022-01-31 17:58:15,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:15,832 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:15,832 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:15,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:15,833 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:15,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:16,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:16,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:16,016 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 17:58:16,017 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:16,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [205480097] [2022-01-31 17:58:16,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [205480097] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:16,017 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:16,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 17:58:16,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72557551] [2022-01-31 17:58:16,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:16,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 17:58:16,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:16,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 17:58:16,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2022-01-31 17:58:16,018 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:16,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:16,267 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2022-01-31 17:58:16,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 17:58:16,269 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 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 54 [2022-01-31 17:58:16,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:16,269 INFO L225 Difference]: With dead ends: 68 [2022-01-31 17:58:16,269 INFO L226 Difference]: Without dead ends: 58 [2022-01-31 17:58:16,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=693, Invalid=1113, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 17:58:16,270 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 51 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:16,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 37 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:58:16,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-01-31 17:58:16,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2022-01-31 17:58:16,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 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), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:16,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2022-01-31 17:58:16,275 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 54 [2022-01-31 17:58:16,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:16,275 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2022-01-31 17:58:16,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:16,275 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2022-01-31 17:58:16,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 17:58:16,275 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:16,275 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:16,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-31 17:58:16,276 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:16,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:16,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1171125978, now seen corresponding path program 19 times [2022-01-31 17:58:16,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:16,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [577004758] [2022-01-31 17:58:16,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:16,277 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:16,277 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:16,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:16,278 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:16,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:16,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:16,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:16,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:16,480 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:16,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [577004758] [2022-01-31 17:58:16,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [577004758] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:16,480 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:16,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 17:58:16,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019924113] [2022-01-31 17:58:16,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:16,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 17:58:16,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:16,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 17:58:16,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2022-01-31 17:58:16,481 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:16,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:16,777 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2022-01-31 17:58:16,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 17:58:16,778 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-01-31 17:58:16,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:16,778 INFO L225 Difference]: With dead ends: 70 [2022-01-31 17:58:16,778 INFO L226 Difference]: Without dead ends: 60 [2022-01-31 17:58:16,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=759, Invalid=1221, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 17:58:16,779 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 53 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:16,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 42 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:58:16,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-01-31 17:58:16,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2022-01-31 17:58:16,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.037037037037037) internal successors, (56), 54 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:16,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2022-01-31 17:58:16,785 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 56 [2022-01-31 17:58:16,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:16,786 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2022-01-31 17:58:16,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:16,786 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2022-01-31 17:58:16,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-31 17:58:16,786 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:16,786 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:16,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-31 17:58:16,786 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:16,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:16,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1254945284, now seen corresponding path program 20 times [2022-01-31 17:58:16,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:16,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1193847810] [2022-01-31 17:58:16,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:16,788 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:16,789 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:16,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:16,790 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:16,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:17,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:17,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:17,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:17,004 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:17,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1193847810] [2022-01-31 17:58:17,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1193847810] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:17,004 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:17,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 17:58:17,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138207183] [2022-01-31 17:58:17,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:17,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 17:58:17,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:17,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 17:58:17,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2022-01-31 17:58:17,005 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:17,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:17,301 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2022-01-31 17:58:17,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 17:58:17,301 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-01-31 17:58:17,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:17,302 INFO L225 Difference]: With dead ends: 72 [2022-01-31 17:58:17,302 INFO L226 Difference]: Without dead ends: 62 [2022-01-31 17:58:17,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=828, Invalid=1334, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 17:58:17,303 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 55 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:17,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 42 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:58:17,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-01-31 17:58:17,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2022-01-31 17:58:17,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 56 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:17,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2022-01-31 17:58:17,308 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 58 [2022-01-31 17:58:17,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:17,308 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2022-01-31 17:58:17,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:17,308 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2022-01-31 17:58:17,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-31 17:58:17,308 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:17,308 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:17,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-31 17:58:17,309 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:17,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:17,309 INFO L85 PathProgramCache]: Analyzing trace with hash -542186338, now seen corresponding path program 21 times [2022-01-31 17:58:17,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:17,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1978026512] [2022-01-31 17:58:17,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:17,310 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:17,310 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:17,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:17,312 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:17,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:17,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:17,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:17,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:17,542 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:17,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1978026512] [2022-01-31 17:58:17,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1978026512] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:17,542 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:17,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 17:58:17,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347359327] [2022-01-31 17:58:17,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:17,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 17:58:17,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:17,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 17:58:17,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-01-31 17:58:17,543 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:17,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:17,845 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2022-01-31 17:58:17,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 17:58:17,846 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 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 60 [2022-01-31 17:58:17,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:17,846 INFO L225 Difference]: With dead ends: 74 [2022-01-31 17:58:17,846 INFO L226 Difference]: Without dead ends: 64 [2022-01-31 17:58:17,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=900, Invalid=1452, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 17:58:17,847 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 57 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:17,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 37 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:58:17,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-01-31 17:58:17,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2022-01-31 17:58:17,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 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), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:17,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2022-01-31 17:58:17,852 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 60 [2022-01-31 17:58:17,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:17,853 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2022-01-31 17:58:17,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:17,853 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2022-01-31 17:58:17,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 17:58:17,853 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:17,853 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:17,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-31 17:58:17,853 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:17,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:17,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1519360704, now seen corresponding path program 22 times [2022-01-31 17:58:17,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:17,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1588452364] [2022-01-31 17:58:17,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:17,855 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:17,855 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:17,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:17,856 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:17,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:18,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:18,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:18,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:18,097 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:18,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1588452364] [2022-01-31 17:58:18,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1588452364] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:18,097 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:18,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 17:58:18,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432390497] [2022-01-31 17:58:18,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:18,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 17:58:18,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:18,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 17:58:18,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2022-01-31 17:58:18,099 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:18,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:18,433 INFO L93 Difference]: Finished difference Result 76 states and 78 transitions. [2022-01-31 17:58:18,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 17:58:18,433 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-01-31 17:58:18,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:18,434 INFO L225 Difference]: With dead ends: 76 [2022-01-31 17:58:18,434 INFO L226 Difference]: Without dead ends: 66 [2022-01-31 17:58:18,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=975, Invalid=1575, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 17:58:18,435 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 59 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:18,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 47 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:58:18,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-01-31 17:58:18,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2022-01-31 17:58:18,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 60 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:18,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2022-01-31 17:58:18,440 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 62 [2022-01-31 17:58:18,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:18,440 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2022-01-31 17:58:18,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:18,441 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2022-01-31 17:58:18,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-31 17:58:18,441 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:18,441 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:18,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-01-31 17:58:18,441 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:18,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:18,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1608822686, now seen corresponding path program 23 times [2022-01-31 17:58:18,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:18,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [717239906] [2022-01-31 17:58:18,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:18,443 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:18,443 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:18,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:18,444 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:18,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:18,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:18,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:18,706 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 17:58:18,706 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:18,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [717239906] [2022-01-31 17:58:18,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [717239906] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:18,706 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:18,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 17:58:18,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180021277] [2022-01-31 17:58:18,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:18,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 17:58:18,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:18,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 17:58:18,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2022-01-31 17:58:18,707 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:19,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:19,040 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2022-01-31 17:58:19,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 17:58:19,040 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-01-31 17:58:19,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:19,041 INFO L225 Difference]: With dead ends: 78 [2022-01-31 17:58:19,041 INFO L226 Difference]: Without dead ends: 68 [2022-01-31 17:58:19,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1053, Invalid=1703, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 17:58:19,042 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 61 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:19,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 27 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:58:19,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-01-31 17:58:19,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2022-01-31 17:58:19,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.032258064516129) internal successors, (64), 62 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:19,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2022-01-31 17:58:19,048 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 64 [2022-01-31 17:58:19,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:19,048 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2022-01-31 17:58:19,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:19,048 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2022-01-31 17:58:19,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 17:58:19,049 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:19,049 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:19,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-01-31 17:58:19,049 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:19,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:19,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1315953276, now seen corresponding path program 24 times [2022-01-31 17:58:19,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:19,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1438674524] [2022-01-31 17:58:19,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:19,051 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:19,051 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:19,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:19,052 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:19,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:19,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:19,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:19,324 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 17:58:19,324 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:19,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1438674524] [2022-01-31 17:58:19,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1438674524] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:19,324 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:19,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 17:58:19,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171504116] [2022-01-31 17:58:19,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:19,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 17:58:19,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:19,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 17:58:19,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2022-01-31 17:58:19,325 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:19,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:19,679 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2022-01-31 17:58:19,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 17:58:19,679 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 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 66 [2022-01-31 17:58:19,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:19,680 INFO L225 Difference]: With dead ends: 80 [2022-01-31 17:58:19,680 INFO L226 Difference]: Without dead ends: 70 [2022-01-31 17:58:19,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1134, Invalid=1836, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 17:58:19,681 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 63 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:19,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 37 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:58:19,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-01-31 17:58:19,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2022-01-31 17:58:19,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 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), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:19,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2022-01-31 17:58:19,687 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 66 [2022-01-31 17:58:19,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:19,687 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2022-01-31 17:58:19,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:19,687 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2022-01-31 17:58:19,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-31 17:58:19,688 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:19,688 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:19,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-01-31 17:58:19,688 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:19,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:19,688 INFO L85 PathProgramCache]: Analyzing trace with hash 958675494, now seen corresponding path program 25 times [2022-01-31 17:58:19,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:19,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1227269041] [2022-01-31 17:58:19,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:19,691 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:19,691 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:19,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:19,692 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:19,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:20,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:20,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:20,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:20,056 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:20,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1227269041] [2022-01-31 17:58:20,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1227269041] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:20,057 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:20,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 17:58:20,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734408577] [2022-01-31 17:58:20,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:20,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 17:58:20,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:20,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 17:58:20,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2022-01-31 17:58:20,058 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 30 states, 30 states have (on average 2.1) internal successors, (63), 29 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:20,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:20,446 INFO L93 Difference]: Finished difference Result 82 states and 84 transitions. [2022-01-31 17:58:20,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 17:58:20,447 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1) internal successors, (63), 29 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-01-31 17:58:20,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:20,447 INFO L225 Difference]: With dead ends: 82 [2022-01-31 17:58:20,447 INFO L226 Difference]: Without dead ends: 72 [2022-01-31 17:58:20,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1218, Invalid=1974, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 17:58:20,449 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 65 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:20,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 37 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:58:20,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-01-31 17:58:20,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2022-01-31 17:58:20,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.0303030303030303) internal successors, (68), 66 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:20,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2022-01-31 17:58:20,455 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 68 [2022-01-31 17:58:20,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:20,458 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2022-01-31 17:58:20,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1) internal successors, (63), 29 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:20,458 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2022-01-31 17:58:20,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-31 17:58:20,458 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:20,458 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:20,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-01-31 17:58:20,458 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:20,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:20,459 INFO L85 PathProgramCache]: Analyzing trace with hash 738569800, now seen corresponding path program 26 times [2022-01-31 17:58:20,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:20,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [415672051] [2022-01-31 17:58:20,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:20,460 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:20,460 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:20,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:20,461 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:20,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:20,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:20,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:20,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:20,782 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:20,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [415672051] [2022-01-31 17:58:20,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [415672051] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:20,783 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:20,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 17:58:20,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199636564] [2022-01-31 17:58:20,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:20,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 17:58:20,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:20,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 17:58:20,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2022-01-31 17:58:20,784 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:21,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:21,257 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2022-01-31 17:58:21,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 17:58:21,257 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-01-31 17:58:21,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:21,257 INFO L225 Difference]: With dead ends: 84 [2022-01-31 17:58:21,258 INFO L226 Difference]: Without dead ends: 74 [2022-01-31 17:58:21,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1305, Invalid=2117, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 17:58:21,259 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 67 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:21,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 57 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:58:21,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-01-31 17:58:21,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2022-01-31 17:58:21,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 68 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:21,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2022-01-31 17:58:21,266 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 70 [2022-01-31 17:58:21,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:21,266 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2022-01-31 17:58:21,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:21,266 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2022-01-31 17:58:21,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 17:58:21,266 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:21,266 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:21,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-01-31 17:58:21,267 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:21,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:21,267 INFO L85 PathProgramCache]: Analyzing trace with hash -329604630, now seen corresponding path program 27 times [2022-01-31 17:58:21,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:21,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1955701707] [2022-01-31 17:58:21,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:21,268 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:21,268 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:21,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:21,270 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:21,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:21,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:21,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:21,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:21,628 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:21,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1955701707] [2022-01-31 17:58:21,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1955701707] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:21,629 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:21,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 17:58:21,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567748058] [2022-01-31 17:58:21,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:21,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 17:58:21,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:21,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 17:58:21,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2022-01-31 17:58:21,630 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:22,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:22,128 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2022-01-31 17:58:22,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 17:58:22,129 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 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 72 [2022-01-31 17:58:22,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:22,129 INFO L225 Difference]: With dead ends: 86 [2022-01-31 17:58:22,129 INFO L226 Difference]: Without dead ends: 76 [2022-01-31 17:58:22,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1395, Invalid=2265, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 17:58:22,130 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 69 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:22,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 32 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:58:22,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-01-31 17:58:22,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2022-01-31 17:58:22,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 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), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:22,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2022-01-31 17:58:22,138 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 72 [2022-01-31 17:58:22,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:22,138 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2022-01-31 17:58:22,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:22,138 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2022-01-31 17:58:22,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 17:58:22,138 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:22,138 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:22,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-01-31 17:58:22,138 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:22,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:22,139 INFO L85 PathProgramCache]: Analyzing trace with hash -348048116, now seen corresponding path program 28 times [2022-01-31 17:58:22,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:22,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [917784176] [2022-01-31 17:58:22,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:22,140 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:22,140 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:22,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:22,142 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:22,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:22,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:22,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:22,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:22,509 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:22,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [917784176] [2022-01-31 17:58:22,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [917784176] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:22,509 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:22,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 17:58:22,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527339176] [2022-01-31 17:58:22,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:22,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 17:58:22,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:22,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 17:58:22,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 17:58:22,510 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:22,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:22,996 INFO L93 Difference]: Finished difference Result 88 states and 90 transitions. [2022-01-31 17:58:22,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 17:58:22,996 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-01-31 17:58:22,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:22,997 INFO L225 Difference]: With dead ends: 88 [2022-01-31 17:58:22,997 INFO L226 Difference]: Without dead ends: 78 [2022-01-31 17:58:22,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1488, Invalid=2418, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 17:58:22,998 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 71 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:22,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 52 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:58:22,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-01-31 17:58:23,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2022-01-31 17:58:23,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.0277777777777777) internal successors, (74), 72 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:23,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2022-01-31 17:58:23,005 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 74 [2022-01-31 17:58:23,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:23,006 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2022-01-31 17:58:23,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:23,006 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2022-01-31 17:58:23,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-31 17:58:23,006 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:23,006 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:23,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-01-31 17:58:23,006 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:23,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:23,006 INFO L85 PathProgramCache]: Analyzing trace with hash -892368978, now seen corresponding path program 29 times [2022-01-31 17:58:23,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:23,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1320389539] [2022-01-31 17:58:23,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:23,008 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:23,008 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:23,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:23,009 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:23,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:23,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:23,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:23,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:23,398 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:23,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1320389539] [2022-01-31 17:58:23,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1320389539] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:23,399 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:23,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 17:58:23,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201704932] [2022-01-31 17:58:23,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:23,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 17:58:23,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:23,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 17:58:23,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 17:58:23,400 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 33 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:23,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:23,933 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2022-01-31 17:58:23,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 17:58:23,933 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 33 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-01-31 17:58:23,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:23,934 INFO L225 Difference]: With dead ends: 90 [2022-01-31 17:58:23,934 INFO L226 Difference]: Without dead ends: 80 [2022-01-31 17:58:23,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1584, Invalid=2576, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 17:58:23,937 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 73 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:23,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 37 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:58:23,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-01-31 17:58:23,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2022-01-31 17:58:23,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.027027027027027) internal successors, (76), 74 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:23,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2022-01-31 17:58:23,948 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 76 [2022-01-31 17:58:23,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:23,948 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2022-01-31 17:58:23,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 33 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:23,948 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2022-01-31 17:58:23,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-31 17:58:23,949 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:23,949 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:23,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-01-31 17:58:23,949 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:23,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:23,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1292752, now seen corresponding path program 30 times [2022-01-31 17:58:23,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:23,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [658545896] [2022-01-31 17:58:23,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:23,951 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:23,951 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:23,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:23,952 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:23,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:24,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:24,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:24,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:24,268 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:24,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [658545896] [2022-01-31 17:58:24,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [658545896] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:24,275 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:24,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 17:58:24,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576804204] [2022-01-31 17:58:24,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:24,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 17:58:24,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:24,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 17:58:24,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 17:58:24,278 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:24,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:24,801 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2022-01-31 17:58:24,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 17:58:24,801 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 78 [2022-01-31 17:58:24,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:24,801 INFO L225 Difference]: With dead ends: 92 [2022-01-31 17:58:24,802 INFO L226 Difference]: Without dead ends: 82 [2022-01-31 17:58:24,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1683, Invalid=2739, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 17:58:24,803 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 75 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:24,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 57 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:58:24,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-01-31 17:58:24,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2022-01-31 17:58:24,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 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), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:24,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2022-01-31 17:58:24,810 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 78 [2022-01-31 17:58:24,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:24,811 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2022-01-31 17:58:24,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:24,811 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2022-01-31 17:58:24,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-31 17:58:24,811 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:24,811 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:24,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-01-31 17:58:24,811 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:24,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:24,812 INFO L85 PathProgramCache]: Analyzing trace with hash -183243918, now seen corresponding path program 31 times [2022-01-31 17:58:24,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:24,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [398073101] [2022-01-31 17:58:24,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:24,813 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:24,813 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:24,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:24,815 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:24,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:25,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:25,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:25,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:25,260 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:25,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [398073101] [2022-01-31 17:58:25,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [398073101] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:25,261 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:25,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 17:58:25,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74189777] [2022-01-31 17:58:25,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:25,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 17:58:25,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:25,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 17:58:25,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 17:58:25,262 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 35 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:25,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:25,804 INFO L93 Difference]: Finished difference Result 94 states and 96 transitions. [2022-01-31 17:58:25,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 17:58:25,804 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 35 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-01-31 17:58:25,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:25,805 INFO L225 Difference]: With dead ends: 94 [2022-01-31 17:58:25,805 INFO L226 Difference]: Without dead ends: 84 [2022-01-31 17:58:25,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1785, Invalid=2907, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 17:58:25,806 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 77 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:25,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 37 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:58:25,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-01-31 17:58:25,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2022-01-31 17:58:25,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.0256410256410255) internal successors, (80), 78 states have internal predecessors, (80), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:25,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2022-01-31 17:58:25,814 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 80 [2022-01-31 17:58:25,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:25,814 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2022-01-31 17:58:25,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 35 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:25,814 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2022-01-31 17:58:25,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-01-31 17:58:25,814 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:25,814 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:25,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-01-31 17:58:25,815 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:25,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:25,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1429324652, now seen corresponding path program 32 times [2022-01-31 17:58:25,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:25,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1958981425] [2022-01-31 17:58:25,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:25,816 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:25,817 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:25,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:25,818 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:25,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:26,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:26,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:26,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:26,271 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:26,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1958981425] [2022-01-31 17:58:26,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1958981425] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:26,271 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:26,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 17:58:26,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754201663] [2022-01-31 17:58:26,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:26,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 17:58:26,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:26,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 17:58:26,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 17:58:26,273 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 36 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:26,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:26,829 INFO L93 Difference]: Finished difference Result 96 states and 98 transitions. [2022-01-31 17:58:26,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 17:58:26,830 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 36 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 82 [2022-01-31 17:58:26,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:26,830 INFO L225 Difference]: With dead ends: 96 [2022-01-31 17:58:26,830 INFO L226 Difference]: Without dead ends: 86 [2022-01-31 17:58:26,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1890, Invalid=3080, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 17:58:26,831 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 79 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:26,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 32 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:58:26,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-01-31 17:58:26,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2022-01-31 17:58:26,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.025) internal successors, (82), 80 states have internal predecessors, (82), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:26,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2022-01-31 17:58:26,840 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 82 [2022-01-31 17:58:26,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:26,840 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2022-01-31 17:58:26,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 36 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:26,841 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2022-01-31 17:58:26,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-01-31 17:58:26,841 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:26,841 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:26,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-01-31 17:58:26,841 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:26,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:26,841 INFO L85 PathProgramCache]: Analyzing trace with hash -617034442, now seen corresponding path program 33 times [2022-01-31 17:58:26,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:26,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [210134358] [2022-01-31 17:58:26,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:26,845 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:26,845 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:26,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:26,847 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:26,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:27,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:27,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:27,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:27,324 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:27,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [210134358] [2022-01-31 17:58:27,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [210134358] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:27,324 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:27,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 17:58:27,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38851064] [2022-01-31 17:58:27,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:27,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 17:58:27,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:27,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 17:58:27,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 17:58:27,326 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 37 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:27,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:27,853 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2022-01-31 17:58:27,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 17:58:27,854 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 37 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 84 [2022-01-31 17:58:27,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:27,854 INFO L225 Difference]: With dead ends: 98 [2022-01-31 17:58:27,854 INFO L226 Difference]: Without dead ends: 88 [2022-01-31 17:58:27,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1998, Invalid=3258, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 17:58:27,855 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 81 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:27,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 52 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:58:27,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-01-31 17:58:27,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2022-01-31 17:58:27,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 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), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:27,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2022-01-31 17:58:27,864 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 84 [2022-01-31 17:58:27,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:27,864 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2022-01-31 17:58:27,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 37 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:27,865 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2022-01-31 17:58:27,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-01-31 17:58:27,865 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:27,865 INFO L514 BasicCegarLoop]: trace histogram [35, 35, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:27,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-01-31 17:58:27,865 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:27,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:27,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1690190504, now seen corresponding path program 34 times [2022-01-31 17:58:27,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:27,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [602387850] [2022-01-31 17:58:27,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:27,867 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:27,867 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:27,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:27,868 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:27,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:28,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:28,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:28,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:28,356 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:28,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [602387850] [2022-01-31 17:58:28,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [602387850] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:28,356 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:28,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-01-31 17:58:28,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155448828] [2022-01-31 17:58:28,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:28,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 17:58:28,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:28,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 17:58:28,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 17:58:28,358 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand has 39 states, 39 states have (on average 2.076923076923077) internal successors, (81), 38 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:28,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:28,961 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2022-01-31 17:58:28,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 17:58:28,962 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.076923076923077) internal successors, (81), 38 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2022-01-31 17:58:28,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:28,965 INFO L225 Difference]: With dead ends: 100 [2022-01-31 17:58:28,965 INFO L226 Difference]: Without dead ends: 90 [2022-01-31 17:58:28,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2109, Invalid=3441, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 17:58:28,967 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 83 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:28,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 47 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:58:28,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-01-31 17:58:28,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2022-01-31 17:58:28,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.0238095238095237) internal successors, (86), 84 states have internal predecessors, (86), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:28,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2022-01-31 17:58:28,976 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 86 [2022-01-31 17:58:28,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:28,976 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2022-01-31 17:58:28,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.076923076923077) internal successors, (81), 38 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:28,977 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2022-01-31 17:58:28,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-01-31 17:58:28,977 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:28,977 INFO L514 BasicCegarLoop]: trace histogram [36, 36, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:28,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-01-31 17:58:28,977 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:28,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:28,977 INFO L85 PathProgramCache]: Analyzing trace with hash 2093952250, now seen corresponding path program 35 times [2022-01-31 17:58:28,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:28,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [546647297] [2022-01-31 17:58:28,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:28,983 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:28,984 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:28,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:28,985 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:29,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:29,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:29,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:29,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:29,430 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:29,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [546647297] [2022-01-31 17:58:29,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [546647297] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:29,431 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:29,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-01-31 17:58:29,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380051248] [2022-01-31 17:58:29,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:29,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 17:58:29,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:29,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 17:58:29,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 17:58:29,432 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand has 40 states, 40 states have (on average 2.075) internal successors, (83), 39 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:29,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:29,876 INFO L93 Difference]: Finished difference Result 102 states and 104 transitions. [2022-01-31 17:58:29,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 17:58:29,876 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.075) internal successors, (83), 39 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 88 [2022-01-31 17:58:29,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:29,877 INFO L225 Difference]: With dead ends: 102 [2022-01-31 17:58:29,877 INFO L226 Difference]: Without dead ends: 92 [2022-01-31 17:58:29,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2223, Invalid=3629, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 17:58:29,878 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 85 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:29,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 42 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:58:29,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-01-31 17:58:29,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2022-01-31 17:58:29,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.0232558139534884) internal successors, (88), 86 states have internal predecessors, (88), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:29,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2022-01-31 17:58:29,888 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 88 [2022-01-31 17:58:29,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:29,888 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2022-01-31 17:58:29,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.075) internal successors, (83), 39 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:29,888 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2022-01-31 17:58:29,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-01-31 17:58:29,888 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:29,888 INFO L514 BasicCegarLoop]: trace histogram [37, 37, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:29,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-01-31 17:58:29,889 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:29,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:29,889 INFO L85 PathProgramCache]: Analyzing trace with hash 817839132, now seen corresponding path program 36 times [2022-01-31 17:58:29,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:29,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1272215407] [2022-01-31 17:58:29,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:29,891 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:29,891 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:29,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:29,892 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:29,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:30,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:30,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:30,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:30,290 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:30,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1272215407] [2022-01-31 17:58:30,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1272215407] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:30,291 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:30,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-01-31 17:58:30,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903199670] [2022-01-31 17:58:30,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:30,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-31 17:58:30,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:30,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-31 17:58:30,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 17:58:30,292 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand has 41 states, 41 states have (on average 2.073170731707317) internal successors, (85), 40 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:30,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:30,835 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2022-01-31 17:58:30,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 17:58:30,836 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.073170731707317) internal successors, (85), 40 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 90 [2022-01-31 17:58:30,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:30,836 INFO L225 Difference]: With dead ends: 104 [2022-01-31 17:58:30,836 INFO L226 Difference]: Without dead ends: 94 [2022-01-31 17:58:30,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2340, Invalid=3822, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 17:58:30,837 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 87 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:30,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 42 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:58:30,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-01-31 17:58:30,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2022-01-31 17:58:30,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 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), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:30,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2022-01-31 17:58:30,849 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 90 [2022-01-31 17:58:30,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:30,849 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2022-01-31 17:58:30,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.073170731707317) internal successors, (85), 40 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:30,849 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2022-01-31 17:58:30,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-01-31 17:58:30,849 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:30,849 INFO L514 BasicCegarLoop]: trace histogram [38, 38, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:30,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-01-31 17:58:30,850 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:30,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:30,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1461187906, now seen corresponding path program 37 times [2022-01-31 17:58:30,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:30,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [273735794] [2022-01-31 17:58:30,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:30,867 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:30,867 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:30,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:30,868 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:30,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:31,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:31,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:31,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:31,321 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:31,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [273735794] [2022-01-31 17:58:31,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [273735794] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:31,321 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:31,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-01-31 17:58:31,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119492399] [2022-01-31 17:58:31,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:31,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 17:58:31,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:31,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 17:58:31,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 17:58:31,322 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand has 42 states, 42 states have (on average 2.0714285714285716) internal successors, (87), 41 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:31,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:31,837 INFO L93 Difference]: Finished difference Result 106 states and 108 transitions. [2022-01-31 17:58:31,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-31 17:58:31,837 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0714285714285716) internal successors, (87), 41 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2022-01-31 17:58:31,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:31,839 INFO L225 Difference]: With dead ends: 106 [2022-01-31 17:58:31,839 INFO L226 Difference]: Without dead ends: 96 [2022-01-31 17:58:31,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2460, Invalid=4020, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 17:58:31,840 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 89 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:31,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 32 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:58:31,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-01-31 17:58:31,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2022-01-31 17:58:31,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.0222222222222221) internal successors, (92), 90 states have internal predecessors, (92), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:31,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2022-01-31 17:58:31,852 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 92 [2022-01-31 17:58:31,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:31,852 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2022-01-31 17:58:31,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.0714285714285716) internal successors, (87), 41 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:31,853 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2022-01-31 17:58:31,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-01-31 17:58:31,853 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:31,853 INFO L514 BasicCegarLoop]: trace histogram [39, 39, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:31,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-01-31 17:58:31,853 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:31,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:31,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1172850464, now seen corresponding path program 38 times [2022-01-31 17:58:31,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:31,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [500439726] [2022-01-31 17:58:31,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:31,856 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:31,856 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:31,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:31,861 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:31,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:32,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:32,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:32,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:32,283 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:32,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [500439726] [2022-01-31 17:58:32,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [500439726] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:32,283 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:32,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-01-31 17:58:32,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128370313] [2022-01-31 17:58:32,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:32,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-31 17:58:32,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:32,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-31 17:58:32,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 17:58:32,284 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand has 43 states, 43 states have (on average 2.0697674418604652) internal successors, (89), 42 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:32,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:32,763 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2022-01-31 17:58:32,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-31 17:58:32,763 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0697674418604652) internal successors, (89), 42 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 94 [2022-01-31 17:58:32,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:32,769 INFO L225 Difference]: With dead ends: 108 [2022-01-31 17:58:32,769 INFO L226 Difference]: Without dead ends: 98 [2022-01-31 17:58:32,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2583, Invalid=4223, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 17:58:32,786 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 91 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:32,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 37 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:58:32,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-01-31 17:58:32,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2022-01-31 17:58:32,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.0217391304347827) internal successors, (94), 92 states have internal predecessors, (94), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:32,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2022-01-31 17:58:32,831 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 94 [2022-01-31 17:58:32,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:32,831 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2022-01-31 17:58:32,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.0697674418604652) internal successors, (89), 42 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:32,831 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2022-01-31 17:58:32,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-01-31 17:58:32,832 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:32,832 INFO L514 BasicCegarLoop]: trace histogram [40, 40, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:32,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-01-31 17:58:32,832 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:32,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:32,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1041524354, now seen corresponding path program 39 times [2022-01-31 17:58:32,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:32,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [164891635] [2022-01-31 17:58:32,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:32,834 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:32,834 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:32,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:32,836 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:32,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:33,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:33,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:33,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:33,487 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:33,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [164891635] [2022-01-31 17:58:33,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [164891635] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:33,487 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:33,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-01-31 17:58:33,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072389241] [2022-01-31 17:58:33,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:33,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 17:58:33,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:33,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 17:58:33,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 17:58:33,488 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand has 44 states, 44 states have (on average 2.0681818181818183) internal successors, (91), 43 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:34,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:34,271 INFO L93 Difference]: Finished difference Result 110 states and 112 transitions. [2022-01-31 17:58:34,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-31 17:58:34,271 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.0681818181818183) internal successors, (91), 43 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 96 [2022-01-31 17:58:34,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:34,271 INFO L225 Difference]: With dead ends: 110 [2022-01-31 17:58:34,272 INFO L226 Difference]: Without dead ends: 100 [2022-01-31 17:58:34,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2709, Invalid=4431, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 17:58:34,273 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 93 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:34,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 37 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:58:34,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-01-31 17:58:34,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2022-01-31 17:58:34,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 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), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:34,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2022-01-31 17:58:34,293 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 96 [2022-01-31 17:58:34,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:34,294 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2022-01-31 17:58:34,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.0681818181818183) internal successors, (91), 43 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:34,295 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2022-01-31 17:58:34,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-01-31 17:58:34,295 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:34,295 INFO L514 BasicCegarLoop]: trace histogram [41, 41, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:34,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-01-31 17:58:34,295 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:34,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:34,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1248054364, now seen corresponding path program 40 times [2022-01-31 17:58:34,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:34,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [144882549] [2022-01-31 17:58:34,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:34,297 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:34,297 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:34,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:34,299 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:34,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:34,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:34,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:34,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:34,953 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:34,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [144882549] [2022-01-31 17:58:34,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [144882549] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:34,953 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:34,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-01-31 17:58:34,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138816766] [2022-01-31 17:58:34,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:34,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-31 17:58:34,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:34,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-31 17:58:34,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 17:58:34,954 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand has 45 states, 45 states have (on average 2.066666666666667) internal successors, (93), 44 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:35,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:35,548 INFO L93 Difference]: Finished difference Result 112 states and 114 transitions. [2022-01-31 17:58:35,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 17:58:35,548 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.066666666666667) internal successors, (93), 44 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 98 [2022-01-31 17:58:35,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:35,549 INFO L225 Difference]: With dead ends: 112 [2022-01-31 17:58:35,549 INFO L226 Difference]: Without dead ends: 102 [2022-01-31 17:58:35,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2838, Invalid=4644, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 17:58:35,550 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 95 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:35,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 57 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:58:35,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-01-31 17:58:35,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2022-01-31 17:58:35,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.0208333333333333) internal successors, (98), 96 states have internal predecessors, (98), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:35,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2022-01-31 17:58:35,562 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 98 [2022-01-31 17:58:35,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:35,563 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2022-01-31 17:58:35,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.066666666666667) internal successors, (93), 44 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:35,563 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2022-01-31 17:58:35,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-01-31 17:58:35,563 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:35,564 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:35,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-01-31 17:58:35,564 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:35,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:35,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1785020486, now seen corresponding path program 41 times [2022-01-31 17:58:35,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:35,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1029223984] [2022-01-31 17:58:35,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:35,566 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:35,567 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:35,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:35,568 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:35,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:36,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:36,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:36,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:36,202 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:36,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1029223984] [2022-01-31 17:58:36,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1029223984] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:36,202 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:36,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-01-31 17:58:36,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938116087] [2022-01-31 17:58:36,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:36,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-31 17:58:36,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:36,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-31 17:58:36,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 17:58:36,203 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand has 46 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 45 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:36,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:36,848 INFO L93 Difference]: Finished difference Result 114 states and 116 transitions. [2022-01-31 17:58:36,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 17:58:36,849 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 45 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 100 [2022-01-31 17:58:36,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:36,849 INFO L225 Difference]: With dead ends: 114 [2022-01-31 17:58:36,849 INFO L226 Difference]: Without dead ends: 104 [2022-01-31 17:58:36,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2970, Invalid=4862, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 17:58:36,850 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 97 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:36,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 32 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:58:36,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-01-31 17:58:36,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2022-01-31 17:58:36,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.0204081632653061) internal successors, (100), 98 states have internal predecessors, (100), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:36,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2022-01-31 17:58:36,864 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 100 [2022-01-31 17:58:36,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:36,864 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2022-01-31 17:58:36,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 45 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:36,865 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2022-01-31 17:58:36,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-31 17:58:36,865 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:36,865 INFO L514 BasicCegarLoop]: trace histogram [43, 43, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:36,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-01-31 17:58:36,865 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:36,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:36,865 INFO L85 PathProgramCache]: Analyzing trace with hash 287157352, now seen corresponding path program 42 times [2022-01-31 17:58:36,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:36,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [724865808] [2022-01-31 17:58:36,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:36,867 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:36,867 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:36,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:36,869 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:36,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:37,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:37,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:37,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:37,380 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:37,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [724865808] [2022-01-31 17:58:37,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [724865808] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:37,380 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:37,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-01-31 17:58:37,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454936963] [2022-01-31 17:58:37,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:37,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-31 17:58:37,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:37,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-31 17:58:37,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 17:58:37,381 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand has 47 states, 47 states have (on average 2.0638297872340425) internal successors, (97), 46 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:37,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:37,960 INFO L93 Difference]: Finished difference Result 116 states and 118 transitions. [2022-01-31 17:58:37,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-31 17:58:37,961 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.0638297872340425) internal successors, (97), 46 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 102 [2022-01-31 17:58:37,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:37,961 INFO L225 Difference]: With dead ends: 116 [2022-01-31 17:58:37,961 INFO L226 Difference]: Without dead ends: 106 [2022-01-31 17:58:37,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=3105, Invalid=5085, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 17:58:37,962 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 99 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:37,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 42 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:58:37,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-01-31 17:58:37,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2022-01-31 17:58:37,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 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), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:37,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2022-01-31 17:58:37,983 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 102 [2022-01-31 17:58:37,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:37,983 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2022-01-31 17:58:37,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.0638297872340425) internal successors, (97), 46 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:37,983 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2022-01-31 17:58:37,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-01-31 17:58:37,983 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:37,984 INFO L514 BasicCegarLoop]: trace histogram [44, 44, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:37,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-01-31 17:58:37,984 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:37,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:37,984 INFO L85 PathProgramCache]: Analyzing trace with hash -345270262, now seen corresponding path program 43 times [2022-01-31 17:58:37,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:37,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [80524747] [2022-01-31 17:58:37,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:37,993 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:37,993 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:37,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:37,995 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:38,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:38,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:38,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:38,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:38,566 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:38,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [80524747] [2022-01-31 17:58:38,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [80524747] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:38,566 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:38,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-01-31 17:58:38,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683798139] [2022-01-31 17:58:38,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:38,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-31 17:58:38,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:38,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-31 17:58:38,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 17:58:38,567 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand has 48 states, 48 states have (on average 2.0625) internal successors, (99), 47 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:39,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:39,190 INFO L93 Difference]: Finished difference Result 118 states and 120 transitions. [2022-01-31 17:58:39,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 17:58:39,191 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0625) internal successors, (99), 47 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 104 [2022-01-31 17:58:39,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:39,212 INFO L225 Difference]: With dead ends: 118 [2022-01-31 17:58:39,212 INFO L226 Difference]: Without dead ends: 108 [2022-01-31 17:58:39,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=3243, Invalid=5313, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 17:58:39,213 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 101 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:39,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 47 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:58:39,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-01-31 17:58:39,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2022-01-31 17:58:39,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 102 states have (on average 1.0196078431372548) internal successors, (104), 102 states have internal predecessors, (104), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:39,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2022-01-31 17:58:39,234 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 104 [2022-01-31 17:58:39,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:39,234 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2022-01-31 17:58:39,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.0625) internal successors, (99), 47 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:39,234 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2022-01-31 17:58:39,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-01-31 17:58:39,235 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:39,235 INFO L514 BasicCegarLoop]: trace histogram [45, 45, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:39,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-01-31 17:58:39,235 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:39,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:39,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1777148716, now seen corresponding path program 44 times [2022-01-31 17:58:39,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:39,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [629785896] [2022-01-31 17:58:39,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:39,237 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:39,237 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:39,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:39,239 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:39,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:40,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:40,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:40,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:40,039 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:40,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [629785896] [2022-01-31 17:58:40,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [629785896] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:40,039 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:40,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-01-31 17:58:40,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557504576] [2022-01-31 17:58:40,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:40,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-31 17:58:40,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:40,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-31 17:58:40,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 17:58:40,041 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand has 49 states, 49 states have (on average 2.061224489795918) internal successors, (101), 48 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:40,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:40,725 INFO L93 Difference]: Finished difference Result 120 states and 122 transitions. [2022-01-31 17:58:40,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 17:58:40,726 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.061224489795918) internal successors, (101), 48 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 106 [2022-01-31 17:58:40,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:40,726 INFO L225 Difference]: With dead ends: 120 [2022-01-31 17:58:40,726 INFO L226 Difference]: Without dead ends: 110 [2022-01-31 17:58:40,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3384, Invalid=5546, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 17:58:40,735 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 103 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:40,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 27 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:58:40,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-01-31 17:58:40,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2022-01-31 17:58:40,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 104 states have (on average 1.0192307692307692) internal successors, (106), 104 states have internal predecessors, (106), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:40,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2022-01-31 17:58:40,759 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 106 [2022-01-31 17:58:40,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:40,760 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2022-01-31 17:58:40,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.061224489795918) internal successors, (101), 48 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:40,760 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2022-01-31 17:58:40,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-01-31 17:58:40,760 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:40,760 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:40,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-01-31 17:58:40,761 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:40,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:40,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1312320974, now seen corresponding path program 45 times [2022-01-31 17:58:40,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:40,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1403975219] [2022-01-31 17:58:40,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:40,762 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:40,762 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:40,762 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:40,764 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:40,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:41,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:41,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:41,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:41,555 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:41,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1403975219] [2022-01-31 17:58:41,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1403975219] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:41,555 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:41,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-01-31 17:58:41,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658675880] [2022-01-31 17:58:41,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:41,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 17:58:41,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:41,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 17:58:41,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 17:58:41,556 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand has 50 states, 50 states have (on average 2.06) internal successors, (103), 49 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:42,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:42,545 INFO L93 Difference]: Finished difference Result 122 states and 124 transitions. [2022-01-31 17:58:42,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-31 17:58:42,546 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.06) internal successors, (103), 49 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 108 [2022-01-31 17:58:42,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:42,546 INFO L225 Difference]: With dead ends: 122 [2022-01-31 17:58:42,546 INFO L226 Difference]: Without dead ends: 112 [2022-01-31 17:58:42,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3528, Invalid=5784, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 17:58:42,547 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 105 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:42,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 47 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:58:42,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-01-31 17:58:42,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2022-01-31 17:58:42,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 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), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:42,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2022-01-31 17:58:42,562 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 108 [2022-01-31 17:58:42,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:42,562 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2022-01-31 17:58:42,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.06) internal successors, (103), 49 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:42,562 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2022-01-31 17:58:42,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-01-31 17:58:42,562 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:42,563 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:42,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-01-31 17:58:42,563 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:42,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:42,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1289459696, now seen corresponding path program 46 times [2022-01-31 17:58:42,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:42,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1280581180] [2022-01-31 17:58:42,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:42,564 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:42,564 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:42,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:42,566 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:42,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:43,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:43,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:43,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:43,376 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:43,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1280581180] [2022-01-31 17:58:43,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1280581180] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:43,376 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:43,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-01-31 17:58:43,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476333830] [2022-01-31 17:58:43,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:43,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-31 17:58:43,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:43,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-31 17:58:43,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 17:58:43,377 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand has 51 states, 51 states have (on average 2.0588235294117645) internal successors, (105), 50 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:44,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:44,295 INFO L93 Difference]: Finished difference Result 124 states and 126 transitions. [2022-01-31 17:58:44,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 17:58:44,296 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.0588235294117645) internal successors, (105), 50 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 110 [2022-01-31 17:58:44,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:44,296 INFO L225 Difference]: With dead ends: 124 [2022-01-31 17:58:44,296 INFO L226 Difference]: Without dead ends: 114 [2022-01-31 17:58:44,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3675, Invalid=6027, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 17:58:44,298 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 107 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:44,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 42 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:58:44,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-01-31 17:58:44,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2022-01-31 17:58:44,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 108 states have (on average 1.0185185185185186) internal successors, (110), 108 states have internal predecessors, (110), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:44,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2022-01-31 17:58:44,313 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 110 [2022-01-31 17:58:44,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:44,313 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2022-01-31 17:58:44,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.0588235294117645) internal successors, (105), 50 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:44,314 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2022-01-31 17:58:44,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-01-31 17:58:44,314 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:44,314 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:44,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-01-31 17:58:44,314 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:44,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:44,315 INFO L85 PathProgramCache]: Analyzing trace with hash 794608018, now seen corresponding path program 47 times [2022-01-31 17:58:44,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:44,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [109356611] [2022-01-31 17:58:44,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:44,316 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:44,316 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:44,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:44,318 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:44,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:45,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:45,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:45,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:45,207 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:45,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [109356611] [2022-01-31 17:58:45,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [109356611] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:45,207 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:45,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-01-31 17:58:45,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341947778] [2022-01-31 17:58:45,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:45,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-01-31 17:58:45,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:45,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-01-31 17:58:45,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 17:58:45,208 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand has 52 states, 52 states have (on average 2.0576923076923075) internal successors, (107), 51 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:46,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:46,056 INFO L93 Difference]: Finished difference Result 126 states and 128 transitions. [2022-01-31 17:58:46,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-31 17:58:46,056 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.0576923076923075) internal successors, (107), 51 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 112 [2022-01-31 17:58:46,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:46,057 INFO L225 Difference]: With dead ends: 126 [2022-01-31 17:58:46,057 INFO L226 Difference]: Without dead ends: 116 [2022-01-31 17:58:46,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3825, Invalid=6275, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 17:58:46,058 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 109 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:46,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 42 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:58:46,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-01-31 17:58:46,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2022-01-31 17:58:46,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.018181818181818) internal successors, (112), 110 states have internal predecessors, (112), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:46,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2022-01-31 17:58:46,074 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 112 [2022-01-31 17:58:46,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:46,074 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2022-01-31 17:58:46,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.0576923076923075) internal successors, (107), 51 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:46,074 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2022-01-31 17:58:46,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-01-31 17:58:46,075 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:46,075 INFO L514 BasicCegarLoop]: trace histogram [49, 49, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:46,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-01-31 17:58:46,075 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:46,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:46,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1983515316, now seen corresponding path program 48 times [2022-01-31 17:58:46,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:46,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [791400665] [2022-01-31 17:58:46,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:46,077 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:46,077 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:46,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:46,079 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:46,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:46,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:46,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:46,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:46,871 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:46,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [791400665] [2022-01-31 17:58:46,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [791400665] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:46,871 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:46,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-01-31 17:58:46,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659511048] [2022-01-31 17:58:46,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:46,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-31 17:58:46,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:46,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-31 17:58:46,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 17:58:46,873 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand has 53 states, 53 states have (on average 2.056603773584906) internal successors, (109), 52 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:47,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:47,766 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2022-01-31 17:58:47,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-31 17:58:47,767 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.056603773584906) internal successors, (109), 52 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 114 [2022-01-31 17:58:47,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:47,767 INFO L225 Difference]: With dead ends: 128 [2022-01-31 17:58:47,767 INFO L226 Difference]: Without dead ends: 118 [2022-01-31 17:58:47,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3978, Invalid=6528, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 17:58:47,768 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 111 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:47,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 32 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:58:47,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-01-31 17:58:47,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2022-01-31 17:58:47,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 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), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:47,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2022-01-31 17:58:47,785 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 114 [2022-01-31 17:58:47,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:47,785 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2022-01-31 17:58:47,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.056603773584906) internal successors, (109), 52 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:47,785 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2022-01-31 17:58:47,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-01-31 17:58:47,786 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:47,786 INFO L514 BasicCegarLoop]: trace histogram [50, 50, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:47,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-01-31 17:58:47,786 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:47,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:47,786 INFO L85 PathProgramCache]: Analyzing trace with hash 2062127958, now seen corresponding path program 49 times [2022-01-31 17:58:47,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:47,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1616368794] [2022-01-31 17:58:47,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:47,788 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:47,788 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:47,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:47,790 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:47,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:48,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:48,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:48,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:48,607 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:48,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1616368794] [2022-01-31 17:58:48,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1616368794] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:48,607 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:48,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-01-31 17:58:48,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050357131] [2022-01-31 17:58:48,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:48,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-01-31 17:58:48,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:48,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-01-31 17:58:48,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 17:58:48,609 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand has 54 states, 54 states have (on average 2.0555555555555554) internal successors, (111), 53 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:49,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:49,347 INFO L93 Difference]: Finished difference Result 130 states and 132 transitions. [2022-01-31 17:58:49,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-31 17:58:49,347 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.0555555555555554) internal successors, (111), 53 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 116 [2022-01-31 17:58:49,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:49,348 INFO L225 Difference]: With dead ends: 130 [2022-01-31 17:58:49,348 INFO L226 Difference]: Without dead ends: 120 [2022-01-31 17:58:49,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1325 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=4134, Invalid=6786, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 17:58:49,350 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 113 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:49,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 32 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:58:49,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-01-31 17:58:49,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2022-01-31 17:58:49,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 114 states have (on average 1.0175438596491229) internal successors, (116), 114 states have internal predecessors, (116), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:49,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 120 transitions. [2022-01-31 17:58:49,367 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 120 transitions. Word has length 116 [2022-01-31 17:58:49,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:49,367 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 120 transitions. [2022-01-31 17:58:49,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.0555555555555554) internal successors, (111), 53 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:49,368 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 120 transitions. [2022-01-31 17:58:49,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-01-31 17:58:49,368 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:49,368 INFO L514 BasicCegarLoop]: trace histogram [51, 51, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:49,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-01-31 17:58:49,368 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:49,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:49,369 INFO L85 PathProgramCache]: Analyzing trace with hash 299465592, now seen corresponding path program 50 times [2022-01-31 17:58:49,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:49,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2114395087] [2022-01-31 17:58:49,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:49,371 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:49,371 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:49,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:49,373 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:49,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:50,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:50,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:50,170 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 17:58:50,170 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:50,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2114395087] [2022-01-31 17:58:50,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2114395087] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:50,170 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:50,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-01-31 17:58:50,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596069748] [2022-01-31 17:58:50,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:50,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-01-31 17:58:50,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:50,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-01-31 17:58:50,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 17:58:50,175 INFO L87 Difference]: Start difference. First operand 119 states and 120 transitions. Second operand has 55 states, 55 states have (on average 2.0545454545454547) internal successors, (113), 54 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:51,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:51,350 INFO L93 Difference]: Finished difference Result 132 states and 134 transitions. [2022-01-31 17:58:51,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-31 17:58:51,350 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.0545454545454547) internal successors, (113), 54 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 118 [2022-01-31 17:58:51,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:51,351 INFO L225 Difference]: With dead ends: 132 [2022-01-31 17:58:51,351 INFO L226 Difference]: Without dead ends: 122 [2022-01-31 17:58:51,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4293, Invalid=7049, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 17:58:51,353 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 115 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:51,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 47 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:58:51,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-01-31 17:58:51,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2022-01-31 17:58:51,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.0172413793103448) internal successors, (118), 116 states have internal predecessors, (118), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:51,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2022-01-31 17:58:51,377 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 118 [2022-01-31 17:58:51,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:51,377 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2022-01-31 17:58:51,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.0545454545454547) internal successors, (113), 54 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:51,378 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2022-01-31 17:58:51,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-01-31 17:58:51,378 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:51,378 INFO L514 BasicCegarLoop]: trace histogram [52, 52, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:51,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-01-31 17:58:51,378 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:51,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:51,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1401953510, now seen corresponding path program 51 times [2022-01-31 17:58:51,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:51,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [148999040] [2022-01-31 17:58:51,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:51,381 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:51,381 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:51,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:51,384 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:51,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:52,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:52,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:52,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:52,301 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:52,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [148999040] [2022-01-31 17:58:52,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [148999040] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:52,301 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:52,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-01-31 17:58:52,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723064079] [2022-01-31 17:58:52,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:52,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-31 17:58:52,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:52,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-31 17:58:52,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 17:58:52,302 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand has 56 states, 56 states have (on average 2.0535714285714284) internal successors, (115), 55 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:53,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:53,235 INFO L93 Difference]: Finished difference Result 134 states and 136 transitions. [2022-01-31 17:58:53,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-31 17:58:53,235 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.0535714285714284) internal successors, (115), 55 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 120 [2022-01-31 17:58:53,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:53,236 INFO L225 Difference]: With dead ends: 134 [2022-01-31 17:58:53,236 INFO L226 Difference]: Without dead ends: 124 [2022-01-31 17:58:53,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=4455, Invalid=7317, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 17:58:53,237 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 117 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:53,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 42 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:58:53,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-01-31 17:58:53,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2022-01-31 17:58:53,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 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), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:53,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2022-01-31 17:58:53,255 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 120 [2022-01-31 17:58:53,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:53,255 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2022-01-31 17:58:53,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.0535714285714284) internal successors, (115), 55 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:53,255 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2022-01-31 17:58:53,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-01-31 17:58:53,255 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:53,256 INFO L514 BasicCegarLoop]: trace histogram [53, 53, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:53,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-01-31 17:58:53,256 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:53,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:53,256 INFO L85 PathProgramCache]: Analyzing trace with hash -83170756, now seen corresponding path program 52 times [2022-01-31 17:58:53,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:53,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [521491031] [2022-01-31 17:58:53,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:53,258 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:53,258 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:53,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:53,260 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:53,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:54,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:54,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:54,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:54,232 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:54,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [521491031] [2022-01-31 17:58:54,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [521491031] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:54,232 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:54,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-01-31 17:58:54,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146442555] [2022-01-31 17:58:54,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:54,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-01-31 17:58:54,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:54,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-01-31 17:58:54,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 17:58:54,233 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand has 57 states, 57 states have (on average 2.0526315789473686) internal successors, (117), 56 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:55,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:55,011 INFO L93 Difference]: Finished difference Result 136 states and 138 transitions. [2022-01-31 17:58:55,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 17:58:55,011 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.0526315789473686) internal successors, (117), 56 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 122 [2022-01-31 17:58:55,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:55,011 INFO L225 Difference]: With dead ends: 136 [2022-01-31 17:58:55,012 INFO L226 Difference]: Without dead ends: 126 [2022-01-31 17:58:55,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1484 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=4620, Invalid=7590, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 17:58:55,014 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 119 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:55,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 32 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:58:55,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-01-31 17:58:55,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2022-01-31 17:58:55,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 120 states have (on average 1.0166666666666666) internal successors, (122), 120 states have internal predecessors, (122), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:55,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2022-01-31 17:58:55,033 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 122 [2022-01-31 17:58:55,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:55,033 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2022-01-31 17:58:55,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.0526315789473686) internal successors, (117), 56 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:55,033 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2022-01-31 17:58:55,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-31 17:58:55,033 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:55,034 INFO L514 BasicCegarLoop]: trace histogram [54, 54, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:55,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-01-31 17:58:55,034 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:55,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:55,034 INFO L85 PathProgramCache]: Analyzing trace with hash 251703518, now seen corresponding path program 53 times [2022-01-31 17:58:55,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:55,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [288410] [2022-01-31 17:58:55,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:55,036 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:55,037 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:55,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:55,039 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:55,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:55,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:55,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:55,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:55,754 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:55,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [288410] [2022-01-31 17:58:55,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [288410] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:55,754 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:55,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-01-31 17:58:55,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340642235] [2022-01-31 17:58:55,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:55,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-01-31 17:58:55,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:55,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-01-31 17:58:55,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 17:58:55,755 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand has 58 states, 58 states have (on average 2.0517241379310347) internal successors, (119), 57 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:56,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:56,593 INFO L93 Difference]: Finished difference Result 138 states and 140 transitions. [2022-01-31 17:58:56,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-31 17:58:56,593 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.0517241379310347) internal successors, (119), 57 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 124 [2022-01-31 17:58:56,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:56,593 INFO L225 Difference]: With dead ends: 138 [2022-01-31 17:58:56,593 INFO L226 Difference]: Without dead ends: 128 [2022-01-31 17:58:56,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=4788, Invalid=7868, Unknown=0, NotChecked=0, Total=12656 [2022-01-31 17:58:56,596 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 121 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:56,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 47 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:58:56,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-01-31 17:58:56,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2022-01-31 17:58:56,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 122 states have (on average 1.0163934426229508) internal successors, (124), 122 states have internal predecessors, (124), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:56,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2022-01-31 17:58:56,619 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 124 [2022-01-31 17:58:56,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:56,619 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2022-01-31 17:58:56,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.0517241379310347) internal successors, (119), 57 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:56,619 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2022-01-31 17:58:56,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-01-31 17:58:56,619 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:56,620 INFO L514 BasicCegarLoop]: trace histogram [55, 55, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:56,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-01-31 17:58:56,620 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:56,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:56,620 INFO L85 PathProgramCache]: Analyzing trace with hash -56666368, now seen corresponding path program 54 times [2022-01-31 17:58:56,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:56,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1838937164] [2022-01-31 17:58:56,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:56,628 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:56,628 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:56,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:56,631 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:56,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:57,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:57,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:57,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:57,537 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:57,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1838937164] [2022-01-31 17:58:57,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1838937164] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:57,538 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:57,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-01-31 17:58:57,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114285320] [2022-01-31 17:58:57,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:57,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-01-31 17:58:57,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:57,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-01-31 17:58:57,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 17:58:57,539 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand has 59 states, 59 states have (on average 2.0508474576271185) internal successors, (121), 58 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:58,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:58,385 INFO L93 Difference]: Finished difference Result 140 states and 142 transitions. [2022-01-31 17:58:58,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-31 17:58:58,386 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.0508474576271185) internal successors, (121), 58 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 126 [2022-01-31 17:58:58,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:58,386 INFO L225 Difference]: With dead ends: 140 [2022-01-31 17:58:58,386 INFO L226 Difference]: Without dead ends: 130 [2022-01-31 17:58:58,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=4959, Invalid=8151, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 17:58:58,388 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 123 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:58,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 27 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:58:58,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-01-31 17:58:58,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2022-01-31 17:58:58,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 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), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:58,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2022-01-31 17:58:58,409 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 126 [2022-01-31 17:58:58,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:58,409 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2022-01-31 17:58:58,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.0508474576271185) internal successors, (121), 58 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:58,410 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2022-01-31 17:58:58,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-01-31 17:58:58,410 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:58,410 INFO L514 BasicCegarLoop]: trace histogram [56, 56, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:58,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-01-31 17:58:58,410 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:58,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:58,411 INFO L85 PathProgramCache]: Analyzing trace with hash -47383390, now seen corresponding path program 55 times [2022-01-31 17:58:58,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:58,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [607406674] [2022-01-31 17:58:58,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:58,412 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:58,412 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:58,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:58,415 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:58,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:59,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:59,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:59,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:59,243 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:59,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [607406674] [2022-01-31 17:58:59,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [607406674] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:59,243 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:59,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-01-31 17:58:59,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505180450] [2022-01-31 17:58:59,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:59,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-01-31 17:58:59,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:59,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-01-31 17:58:59,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 17:58:59,245 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand has 60 states, 60 states have (on average 2.05) internal successors, (123), 59 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:00,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:00,123 INFO L93 Difference]: Finished difference Result 142 states and 144 transitions. [2022-01-31 17:59:00,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-31 17:59:00,123 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.05) internal successors, (123), 59 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 128 [2022-01-31 17:59:00,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:00,124 INFO L225 Difference]: With dead ends: 142 [2022-01-31 17:59:00,124 INFO L226 Difference]: Without dead ends: 132 [2022-01-31 17:59:00,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1652 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=5133, Invalid=8439, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 17:59:00,125 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 125 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:00,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 47 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:59:00,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-01-31 17:59:00,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2022-01-31 17:59:00,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.0158730158730158) internal successors, (128), 126 states have internal predecessors, (128), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:00,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 132 transitions. [2022-01-31 17:59:00,145 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 132 transitions. Word has length 128 [2022-01-31 17:59:00,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:00,146 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 132 transitions. [2022-01-31 17:59:00,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.05) internal successors, (123), 59 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:00,146 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 132 transitions. [2022-01-31 17:59:00,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-01-31 17:59:00,146 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:00,146 INFO L514 BasicCegarLoop]: trace histogram [57, 57, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:00,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-01-31 17:59:00,146 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:00,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:00,147 INFO L85 PathProgramCache]: Analyzing trace with hash 283623876, now seen corresponding path program 56 times [2022-01-31 17:59:00,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:00,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2008039673] [2022-01-31 17:59:00,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:00,148 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:00,148 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:00,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:00,150 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:00,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:01,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:01,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:01,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:59:01,284 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:01,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2008039673] [2022-01-31 17:59:01,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2008039673] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:01,284 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:01,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-01-31 17:59:01,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034099743] [2022-01-31 17:59:01,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:01,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-01-31 17:59:01,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:01,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-01-31 17:59:01,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 17:59:01,285 INFO L87 Difference]: Start difference. First operand 131 states and 132 transitions. Second operand has 61 states, 61 states have (on average 2.0491803278688523) internal successors, (125), 60 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:02,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:02,467 INFO L93 Difference]: Finished difference Result 144 states and 146 transitions. [2022-01-31 17:59:02,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-31 17:59:02,468 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.0491803278688523) internal successors, (125), 60 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 130 [2022-01-31 17:59:02,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:02,469 INFO L225 Difference]: With dead ends: 144 [2022-01-31 17:59:02,469 INFO L226 Difference]: Without dead ends: 134 [2022-01-31 17:59:02,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1710 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=5310, Invalid=8732, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 17:59:02,470 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 127 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:02,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 42 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:59:02,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-01-31 17:59:02,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2022-01-31 17:59:02,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 1.015625) internal successors, (130), 128 states have internal predecessors, (130), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:02,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2022-01-31 17:59:02,491 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 130 [2022-01-31 17:59:02,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:02,491 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2022-01-31 17:59:02,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.0491803278688523) internal successors, (125), 60 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:02,491 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2022-01-31 17:59:02,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-01-31 17:59:02,492 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:02,492 INFO L514 BasicCegarLoop]: trace histogram [58, 58, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:02,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-01-31 17:59:02,492 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:02,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:02,492 INFO L85 PathProgramCache]: Analyzing trace with hash 554026598, now seen corresponding path program 57 times [2022-01-31 17:59:02,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:02,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2049383276] [2022-01-31 17:59:02,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:02,494 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:02,494 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:02,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:02,496 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:02,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:03,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:03,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:03,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:59:03,268 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:03,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2049383276] [2022-01-31 17:59:03,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2049383276] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:03,268 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:03,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-01-31 17:59:03,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882190209] [2022-01-31 17:59:03,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:03,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-01-31 17:59:03,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:03,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-01-31 17:59:03,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 17:59:03,270 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand has 62 states, 62 states have (on average 2.0483870967741935) internal successors, (127), 61 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:04,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:04,623 INFO L93 Difference]: Finished difference Result 146 states and 148 transitions. [2022-01-31 17:59:04,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-31 17:59:04,623 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.0483870967741935) internal successors, (127), 61 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 132 [2022-01-31 17:59:04,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:04,624 INFO L225 Difference]: With dead ends: 146 [2022-01-31 17:59:04,624 INFO L226 Difference]: Without dead ends: 136 [2022-01-31 17:59:04,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1769 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=5490, Invalid=9030, Unknown=0, NotChecked=0, Total=14520 [2022-01-31 17:59:04,626 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 129 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:04,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 42 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:59:04,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-01-31 17:59:04,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 135. [2022-01-31 17:59:04,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 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), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:04,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2022-01-31 17:59:04,656 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 132 [2022-01-31 17:59:04,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:04,656 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2022-01-31 17:59:04,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.0483870967741935) internal successors, (127), 61 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:04,656 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2022-01-31 17:59:04,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-01-31 17:59:04,657 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:04,657 INFO L514 BasicCegarLoop]: trace histogram [59, 59, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:04,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-01-31 17:59:04,657 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:04,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:04,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1581962616, now seen corresponding path program 58 times [2022-01-31 17:59:04,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:04,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1811187716] [2022-01-31 17:59:04,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:04,659 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:04,659 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:04,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:04,661 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:04,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:05,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:05,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:05,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:59:05,713 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:05,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1811187716] [2022-01-31 17:59:05,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1811187716] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:05,713 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:05,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-01-31 17:59:05,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892978641] [2022-01-31 17:59:05,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:05,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-01-31 17:59:05,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:05,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-01-31 17:59:05,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 17:59:05,715 INFO L87 Difference]: Start difference. First operand 135 states and 136 transitions. Second operand has 63 states, 63 states have (on average 2.0476190476190474) internal successors, (129), 62 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:06,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:06,710 INFO L93 Difference]: Finished difference Result 148 states and 150 transitions. [2022-01-31 17:59:06,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-31 17:59:06,711 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.0476190476190474) internal successors, (129), 62 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 134 [2022-01-31 17:59:06,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:06,711 INFO L225 Difference]: With dead ends: 148 [2022-01-31 17:59:06,712 INFO L226 Difference]: Without dead ends: 138 [2022-01-31 17:59:06,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1829 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=5673, Invalid=9333, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 17:59:06,714 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 131 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:06,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 37 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:59:06,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-01-31 17:59:06,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2022-01-31 17:59:06,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 132 states have (on average 1.0151515151515151) internal successors, (134), 132 states have internal predecessors, (134), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:06,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2022-01-31 17:59:06,736 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 134 [2022-01-31 17:59:06,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:06,737 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2022-01-31 17:59:06,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.0476190476190474) internal successors, (129), 62 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:06,737 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2022-01-31 17:59:06,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-01-31 17:59:06,737 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:06,737 INFO L514 BasicCegarLoop]: trace histogram [60, 60, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:06,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-01-31 17:59:06,738 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:06,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:06,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1273229782, now seen corresponding path program 59 times [2022-01-31 17:59:06,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:06,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [848987527] [2022-01-31 17:59:06,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:06,739 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:06,739 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:06,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:06,741 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:06,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:07,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:07,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:07,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:59:07,909 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:07,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [848987527] [2022-01-31 17:59:07,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [848987527] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:07,910 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:07,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-01-31 17:59:07,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036521872] [2022-01-31 17:59:07,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:07,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-01-31 17:59:07,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:07,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-01-31 17:59:07,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 17:59:07,911 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand has 64 states, 64 states have (on average 2.046875) internal successors, (131), 63 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:08,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:08,900 INFO L93 Difference]: Finished difference Result 150 states and 152 transitions. [2022-01-31 17:59:08,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-31 17:59:08,900 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.046875) internal successors, (131), 63 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 136 [2022-01-31 17:59:08,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:08,901 INFO L225 Difference]: With dead ends: 150 [2022-01-31 17:59:08,901 INFO L226 Difference]: Without dead ends: 140 [2022-01-31 17:59:08,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1890 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=5859, Invalid=9641, Unknown=0, NotChecked=0, Total=15500 [2022-01-31 17:59:08,903 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 133 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:08,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 27 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:59:08,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-01-31 17:59:08,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2022-01-31 17:59:08,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 134 states have (on average 1.0149253731343284) internal successors, (136), 134 states have internal predecessors, (136), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:08,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 140 transitions. [2022-01-31 17:59:08,931 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 140 transitions. Word has length 136 [2022-01-31 17:59:08,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:08,931 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 140 transitions. [2022-01-31 17:59:08,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.046875) internal successors, (131), 63 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:08,931 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 140 transitions. [2022-01-31 17:59:08,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-01-31 17:59:08,932 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:08,932 INFO L514 BasicCegarLoop]: trace histogram [61, 61, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:08,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-01-31 17:59:08,932 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:08,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:08,932 INFO L85 PathProgramCache]: Analyzing trace with hash -933719732, now seen corresponding path program 60 times [2022-01-31 17:59:08,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:08,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [944382085] [2022-01-31 17:59:08,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:08,933 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:08,933 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:08,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:08,936 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:08,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:10,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:10,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:10,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:59:10,259 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:10,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [944382085] [2022-01-31 17:59:10,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [944382085] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:10,259 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:10,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-01-31 17:59:10,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813807375] [2022-01-31 17:59:10,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:10,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-01-31 17:59:10,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:10,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-01-31 17:59:10,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 17:59:10,261 INFO L87 Difference]: Start difference. First operand 139 states and 140 transitions. Second operand has 65 states, 65 states have (on average 2.046153846153846) internal successors, (133), 64 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:11,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:11,463 INFO L93 Difference]: Finished difference Result 152 states and 154 transitions. [2022-01-31 17:59:11,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-31 17:59:11,464 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.046153846153846) internal successors, (133), 64 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 138 [2022-01-31 17:59:11,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:11,464 INFO L225 Difference]: With dead ends: 152 [2022-01-31 17:59:11,464 INFO L226 Difference]: Without dead ends: 142 [2022-01-31 17:59:11,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1952 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=6048, Invalid=9954, Unknown=0, NotChecked=0, Total=16002 [2022-01-31 17:59:11,466 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 135 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:11,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 47 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:59:11,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-01-31 17:59:11,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 141. [2022-01-31 17:59:11,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 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), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:11,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2022-01-31 17:59:11,490 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 138 [2022-01-31 17:59:11,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:11,490 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2022-01-31 17:59:11,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.046153846153846) internal successors, (133), 64 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:11,491 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2022-01-31 17:59:11,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-01-31 17:59:11,491 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:11,491 INFO L514 BasicCegarLoop]: trace histogram [62, 62, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:11,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-01-31 17:59:11,491 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:11,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:11,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1082076178, now seen corresponding path program 61 times [2022-01-31 17:59:11,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:11,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [987803113] [2022-01-31 17:59:11,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:11,493 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:11,493 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:11,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:11,495 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:11,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:12,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:12,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:12,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:59:12,457 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:12,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [987803113] [2022-01-31 17:59:12,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [987803113] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:12,457 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:12,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-01-31 17:59:12,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217424596] [2022-01-31 17:59:12,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:12,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-01-31 17:59:12,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:12,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-01-31 17:59:12,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 17:59:12,459 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand has 66 states, 66 states have (on average 2.0454545454545454) internal successors, (135), 65 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:13,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:13,616 INFO L93 Difference]: Finished difference Result 154 states and 156 transitions. [2022-01-31 17:59:13,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-31 17:59:13,616 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.0454545454545454) internal successors, (135), 65 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 140 [2022-01-31 17:59:13,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:13,616 INFO L225 Difference]: With dead ends: 154 [2022-01-31 17:59:13,617 INFO L226 Difference]: Without dead ends: 144 [2022-01-31 17:59:13,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2015 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=6240, Invalid=10272, Unknown=0, NotChecked=0, Total=16512 [2022-01-31 17:59:13,620 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 137 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:13,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 32 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:59:13,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-01-31 17:59:13,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 143. [2022-01-31 17:59:13,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 138 states have (on average 1.0144927536231885) internal successors, (140), 138 states have internal predecessors, (140), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:13,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 144 transitions. [2022-01-31 17:59:13,644 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 144 transitions. Word has length 140 [2022-01-31 17:59:13,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:13,644 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 144 transitions. [2022-01-31 17:59:13,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.0454545454545454) internal successors, (135), 65 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:13,644 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 144 transitions. [2022-01-31 17:59:13,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-01-31 17:59:13,645 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:13,645 INFO L514 BasicCegarLoop]: trace histogram [63, 63, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:13,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-01-31 17:59:13,645 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:13,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:13,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1918700016, now seen corresponding path program 62 times [2022-01-31 17:59:13,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:13,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1387986525] [2022-01-31 17:59:13,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:13,646 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:13,646 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:13,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:13,649 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:13,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:14,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:14,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:14,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:59:14,784 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:14,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1387986525] [2022-01-31 17:59:14,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1387986525] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:14,784 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:14,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-01-31 17:59:14,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433295621] [2022-01-31 17:59:14,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:14,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-01-31 17:59:14,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:14,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-01-31 17:59:14,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 17:59:14,785 INFO L87 Difference]: Start difference. First operand 143 states and 144 transitions. Second operand has 67 states, 67 states have (on average 2.044776119402985) internal successors, (137), 66 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:15,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:15,855 INFO L93 Difference]: Finished difference Result 156 states and 158 transitions. [2022-01-31 17:59:15,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-31 17:59:15,856 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.044776119402985) internal successors, (137), 66 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 142 [2022-01-31 17:59:15,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:15,856 INFO L225 Difference]: With dead ends: 156 [2022-01-31 17:59:15,856 INFO L226 Difference]: Without dead ends: 146 [2022-01-31 17:59:15,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2079 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=6435, Invalid=10595, Unknown=0, NotChecked=0, Total=17030 [2022-01-31 17:59:15,858 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 139 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:15,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 57 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:59:15,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-01-31 17:59:15,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2022-01-31 17:59:15,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.0142857142857142) internal successors, (142), 140 states have internal predecessors, (142), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:15,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2022-01-31 17:59:15,883 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 142 [2022-01-31 17:59:15,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:15,883 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2022-01-31 17:59:15,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.044776119402985) internal successors, (137), 66 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:15,883 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2022-01-31 17:59:15,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-01-31 17:59:15,884 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:15,884 INFO L514 BasicCegarLoop]: trace histogram [64, 64, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:15,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-01-31 17:59:15,884 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:15,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:15,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1539643314, now seen corresponding path program 63 times [2022-01-31 17:59:15,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:15,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1901663082] [2022-01-31 17:59:15,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:15,894 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:15,895 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:15,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:15,897 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:15,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:16,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:16,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:16,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:59:16,856 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:16,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1901663082] [2022-01-31 17:59:16,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1901663082] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:16,856 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:16,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-01-31 17:59:16,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992319464] [2022-01-31 17:59:16,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:16,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-01-31 17:59:16,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:16,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-01-31 17:59:16,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 17:59:16,857 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand has 68 states, 68 states have (on average 2.0441176470588234) internal successors, (139), 67 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:17,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:17,974 INFO L93 Difference]: Finished difference Result 158 states and 160 transitions. [2022-01-31 17:59:17,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-31 17:59:17,974 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.0441176470588234) internal successors, (139), 67 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 144 [2022-01-31 17:59:17,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:17,975 INFO L225 Difference]: With dead ends: 158 [2022-01-31 17:59:17,975 INFO L226 Difference]: Without dead ends: 148 [2022-01-31 17:59:17,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2144 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=6633, Invalid=10923, Unknown=0, NotChecked=0, Total=17556 [2022-01-31 17:59:17,978 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 141 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:17,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 37 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:59:17,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-01-31 17:59:18,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 147. [2022-01-31 17:59:18,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 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), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:18,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 148 transitions. [2022-01-31 17:59:18,005 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 148 transitions. Word has length 144 [2022-01-31 17:59:18,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:18,005 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 148 transitions. [2022-01-31 17:59:18,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.0441176470588234) internal successors, (139), 67 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:18,005 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 148 transitions. [2022-01-31 17:59:18,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-01-31 17:59:18,005 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:18,006 INFO L514 BasicCegarLoop]: trace histogram [65, 65, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:18,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-01-31 17:59:18,006 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:18,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:18,006 INFO L85 PathProgramCache]: Analyzing trace with hash 702896340, now seen corresponding path program 64 times [2022-01-31 17:59:18,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:18,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [345646955] [2022-01-31 17:59:18,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:18,010 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:18,010 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:18,010 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:18,013 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:18,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:19,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:19,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:19,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:59:19,289 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:19,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [345646955] [2022-01-31 17:59:19,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [345646955] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:19,289 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:19,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-01-31 17:59:19,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389430307] [2022-01-31 17:59:19,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:19,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-01-31 17:59:19,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:19,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-01-31 17:59:19,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 17:59:19,292 INFO L87 Difference]: Start difference. First operand 147 states and 148 transitions. Second operand has 69 states, 69 states have (on average 2.0434782608695654) internal successors, (141), 68 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:20,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:20,508 INFO L93 Difference]: Finished difference Result 160 states and 162 transitions. [2022-01-31 17:59:20,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-31 17:59:20,508 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.0434782608695654) internal successors, (141), 68 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 146 [2022-01-31 17:59:20,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:20,509 INFO L225 Difference]: With dead ends: 160 [2022-01-31 17:59:20,509 INFO L226 Difference]: Without dead ends: 150 [2022-01-31 17:59:20,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2210 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=6834, Invalid=11256, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 17:59:20,512 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 143 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:20,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 42 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:59:20,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-01-31 17:59:20,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2022-01-31 17:59:20,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 144 states have (on average 1.0138888888888888) internal successors, (146), 144 states have internal predecessors, (146), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:20,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2022-01-31 17:59:20,557 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 146 [2022-01-31 17:59:20,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:20,558 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2022-01-31 17:59:20,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.0434782608695654) internal successors, (141), 68 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:20,558 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2022-01-31 17:59:20,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-01-31 17:59:20,558 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:20,558 INFO L514 BasicCegarLoop]: trace histogram [66, 66, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:20,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-01-31 17:59:20,559 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:20,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:20,559 INFO L85 PathProgramCache]: Analyzing trace with hash -252061322, now seen corresponding path program 65 times [2022-01-31 17:59:20,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:20,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [832329859] [2022-01-31 17:59:20,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:20,560 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:20,560 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:20,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:20,563 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:20,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:21,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:21,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:21,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:59:21,653 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:21,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [832329859] [2022-01-31 17:59:21,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [832329859] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:21,653 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:21,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-01-31 17:59:21,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239366933] [2022-01-31 17:59:21,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:21,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-01-31 17:59:21,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:21,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-01-31 17:59:21,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2022-01-31 17:59:21,655 INFO L87 Difference]: Start difference. First operand 149 states and 150 transitions. Second operand has 70 states, 70 states have (on average 2.0428571428571427) internal successors, (143), 69 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:22,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:22,858 INFO L93 Difference]: Finished difference Result 162 states and 164 transitions. [2022-01-31 17:59:22,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-31 17:59:22,858 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.0428571428571427) internal successors, (143), 69 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 148 [2022-01-31 17:59:22,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:22,859 INFO L225 Difference]: With dead ends: 162 [2022-01-31 17:59:22,859 INFO L226 Difference]: Without dead ends: 152 [2022-01-31 17:59:22,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2277 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=7038, Invalid=11594, Unknown=0, NotChecked=0, Total=18632 [2022-01-31 17:59:22,861 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 145 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:22,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 32 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:59:22,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-01-31 17:59:22,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 151. [2022-01-31 17:59:22,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 146 states have (on average 1.0136986301369864) internal successors, (148), 146 states have internal predecessors, (148), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:22,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 152 transitions. [2022-01-31 17:59:22,902 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 152 transitions. Word has length 148 [2022-01-31 17:59:22,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:22,903 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 152 transitions. [2022-01-31 17:59:22,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.0428571428571427) internal successors, (143), 69 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:22,903 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 152 transitions. [2022-01-31 17:59:22,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-01-31 17:59:22,903 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:22,903 INFO L514 BasicCegarLoop]: trace histogram [67, 67, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:22,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-01-31 17:59:22,903 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:22,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:22,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1156626840, now seen corresponding path program 66 times [2022-01-31 17:59:22,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:22,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [960579669] [2022-01-31 17:59:22,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:22,905 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:22,905 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:22,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:22,908 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:22,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:24,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:24,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:24,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:59:24,456 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:24,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [960579669] [2022-01-31 17:59:24,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [960579669] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:24,456 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:24,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-01-31 17:59:24,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344557119] [2022-01-31 17:59:24,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:24,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-01-31 17:59:24,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:24,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-01-31 17:59:24,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 17:59:24,458 INFO L87 Difference]: Start difference. First operand 151 states and 152 transitions. Second operand has 71 states, 71 states have (on average 2.0422535211267605) internal successors, (145), 70 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:25,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:25,708 INFO L93 Difference]: Finished difference Result 164 states and 166 transitions. [2022-01-31 17:59:25,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-31 17:59:25,709 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.0422535211267605) internal successors, (145), 70 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 150 [2022-01-31 17:59:25,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:25,709 INFO L225 Difference]: With dead ends: 164 [2022-01-31 17:59:25,709 INFO L226 Difference]: Without dead ends: 154 [2022-01-31 17:59:25,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2345 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=7245, Invalid=11937, Unknown=0, NotChecked=0, Total=19182 [2022-01-31 17:59:25,710 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 147 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:25,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 42 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:59:25,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-01-31 17:59:25,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2022-01-31 17:59:25,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 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), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:25,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 154 transitions. [2022-01-31 17:59:25,737 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 154 transitions. Word has length 150 [2022-01-31 17:59:25,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:25,738 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 154 transitions. [2022-01-31 17:59:25,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.0422535211267605) internal successors, (145), 70 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:25,738 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 154 transitions. [2022-01-31 17:59:25,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-01-31 17:59:25,738 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:25,738 INFO L514 BasicCegarLoop]: trace histogram [68, 68, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:25,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-01-31 17:59:25,738 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:25,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:25,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1991252282, now seen corresponding path program 67 times [2022-01-31 17:59:25,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:25,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1689673243] [2022-01-31 17:59:25,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:25,740 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:25,740 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:25,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:25,743 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:25,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:26,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:26,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:26,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:59:26,737 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:26,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1689673243] [2022-01-31 17:59:26,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1689673243] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:26,737 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:26,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-01-31 17:59:26,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781633509] [2022-01-31 17:59:26,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:26,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-01-31 17:59:26,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:26,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-01-31 17:59:26,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 17:59:26,739 INFO L87 Difference]: Start difference. First operand 153 states and 154 transitions. Second operand has 72 states, 72 states have (on average 2.0416666666666665) internal successors, (147), 71 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:27,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:27,938 INFO L93 Difference]: Finished difference Result 166 states and 168 transitions. [2022-01-31 17:59:27,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-31 17:59:27,938 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.0416666666666665) internal successors, (147), 71 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 152 [2022-01-31 17:59:27,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:27,939 INFO L225 Difference]: With dead ends: 166 [2022-01-31 17:59:27,939 INFO L226 Difference]: Without dead ends: 156 [2022-01-31 17:59:27,940 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2414 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=7455, Invalid=12285, Unknown=0, NotChecked=0, Total=19740 [2022-01-31 17:59:27,940 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 149 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:27,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 47 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:59:27,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-01-31 17:59:27,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2022-01-31 17:59:27,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 150 states have (on average 1.0133333333333334) internal successors, (152), 150 states have internal predecessors, (152), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:27,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 156 transitions. [2022-01-31 17:59:27,968 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 156 transitions. Word has length 152 [2022-01-31 17:59:27,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:27,969 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 156 transitions. [2022-01-31 17:59:27,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.0416666666666665) internal successors, (147), 71 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:27,969 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 156 transitions. [2022-01-31 17:59:27,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-01-31 17:59:27,969 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:27,969 INFO L514 BasicCegarLoop]: trace histogram [69, 69, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:27,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-01-31 17:59:27,970 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:27,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:27,970 INFO L85 PathProgramCache]: Analyzing trace with hash 907417692, now seen corresponding path program 68 times [2022-01-31 17:59:27,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:27,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1296100173] [2022-01-31 17:59:27,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:27,971 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:27,971 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:27,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:27,977 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:27,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:29,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:29,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:29,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:59:29,426 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:29,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1296100173] [2022-01-31 17:59:29,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1296100173] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:29,427 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:29,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-01-31 17:59:29,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638800265] [2022-01-31 17:59:29,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:29,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-01-31 17:59:29,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:29,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-01-31 17:59:29,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 17:59:29,428 INFO L87 Difference]: Start difference. First operand 155 states and 156 transitions. Second operand has 73 states, 73 states have (on average 2.041095890410959) internal successors, (149), 72 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:30,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:30,719 INFO L93 Difference]: Finished difference Result 168 states and 170 transitions. [2022-01-31 17:59:30,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-31 17:59:30,720 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.041095890410959) internal successors, (149), 72 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 154 [2022-01-31 17:59:30,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:30,721 INFO L225 Difference]: With dead ends: 168 [2022-01-31 17:59:30,721 INFO L226 Difference]: Without dead ends: 158 [2022-01-31 17:59:30,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2484 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=7668, Invalid=12638, Unknown=0, NotChecked=0, Total=20306 [2022-01-31 17:59:30,722 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 151 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:30,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 37 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:59:30,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-01-31 17:59:30,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2022-01-31 17:59:30,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 152 states have (on average 1.013157894736842) internal successors, (154), 152 states have internal predecessors, (154), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:30,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2022-01-31 17:59:30,751 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 154 [2022-01-31 17:59:30,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:30,751 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2022-01-31 17:59:30,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.041095890410959) internal successors, (149), 72 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:30,752 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2022-01-31 17:59:30,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-01-31 17:59:30,752 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:30,752 INFO L514 BasicCegarLoop]: trace histogram [70, 70, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:30,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-01-31 17:59:30,752 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:30,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:30,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1275537666, now seen corresponding path program 69 times [2022-01-31 17:59:30,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:30,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1346866249] [2022-01-31 17:59:30,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:30,754 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:30,754 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:30,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:30,757 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:30,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:31,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:31,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:31,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:59:31,797 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:31,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1346866249] [2022-01-31 17:59:31,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1346866249] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:31,797 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:31,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-01-31 17:59:31,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760782475] [2022-01-31 17:59:31,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:31,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-01-31 17:59:31,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:31,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-01-31 17:59:31,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 17:59:31,798 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand has 74 states, 74 states have (on average 2.0405405405405403) internal successors, (151), 73 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:33,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:33,093 INFO L93 Difference]: Finished difference Result 170 states and 172 transitions. [2022-01-31 17:59:33,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-31 17:59:33,093 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.0405405405405403) internal successors, (151), 73 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 156 [2022-01-31 17:59:33,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:33,094 INFO L225 Difference]: With dead ends: 170 [2022-01-31 17:59:33,094 INFO L226 Difference]: Without dead ends: 160 [2022-01-31 17:59:33,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2555 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=7884, Invalid=12996, Unknown=0, NotChecked=0, Total=20880 [2022-01-31 17:59:33,096 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 153 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:33,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 52 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:59:33,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-01-31 17:59:33,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 159. [2022-01-31 17:59:33,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 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), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:33,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 160 transitions. [2022-01-31 17:59:33,127 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 160 transitions. Word has length 156 [2022-01-31 17:59:33,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:33,127 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 160 transitions. [2022-01-31 17:59:33,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.0405405405405403) internal successors, (151), 73 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:33,128 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 160 transitions. [2022-01-31 17:59:33,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-01-31 17:59:33,128 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:33,128 INFO L514 BasicCegarLoop]: trace histogram [71, 71, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:33,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-01-31 17:59:33,128 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:33,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:33,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1143371040, now seen corresponding path program 70 times [2022-01-31 17:59:33,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:33,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1504415410] [2022-01-31 17:59:33,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:33,130 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:33,130 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:33,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:33,133 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:33,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:34,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:34,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:34,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:59:34,198 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:34,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1504415410] [2022-01-31 17:59:34,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1504415410] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:34,198 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:34,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-01-31 17:59:34,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377474882] [2022-01-31 17:59:34,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:34,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-01-31 17:59:34,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:34,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-01-31 17:59:34,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 17:59:34,200 INFO L87 Difference]: Start difference. First operand 159 states and 160 transitions. Second operand has 75 states, 75 states have (on average 2.04) internal successors, (153), 74 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:35,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:35,623 INFO L93 Difference]: Finished difference Result 172 states and 174 transitions. [2022-01-31 17:59:35,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-31 17:59:35,623 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.04) internal successors, (153), 74 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 158 [2022-01-31 17:59:35,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:35,624 INFO L225 Difference]: With dead ends: 172 [2022-01-31 17:59:35,624 INFO L226 Difference]: Without dead ends: 162 [2022-01-31 17:59:35,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2627 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=8103, Invalid=13359, Unknown=0, NotChecked=0, Total=21462 [2022-01-31 17:59:35,627 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 155 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:35,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 42 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:59:35,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-01-31 17:59:35,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 161. [2022-01-31 17:59:35,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 156 states have (on average 1.0128205128205128) internal successors, (158), 156 states have internal predecessors, (158), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:35,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 162 transitions. [2022-01-31 17:59:35,673 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 162 transitions. Word has length 158 [2022-01-31 17:59:35,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:35,673 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 162 transitions. [2022-01-31 17:59:35,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.04) internal successors, (153), 74 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:35,673 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 162 transitions. [2022-01-31 17:59:35,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-01-31 17:59:35,674 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:35,674 INFO L514 BasicCegarLoop]: trace histogram [72, 72, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:35,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-01-31 17:59:35,674 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:35,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:35,675 INFO L85 PathProgramCache]: Analyzing trace with hash 2137330370, now seen corresponding path program 71 times [2022-01-31 17:59:35,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:35,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1832460550] [2022-01-31 17:59:35,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:35,676 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:35,676 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:35,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:35,679 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:35,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:36,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:36,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:36,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:59:36,811 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:36,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1832460550] [2022-01-31 17:59:36,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1832460550] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:36,811 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:36,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-01-31 17:59:36,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695858070] [2022-01-31 17:59:36,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:36,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-01-31 17:59:36,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:36,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-01-31 17:59:36,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 17:59:36,813 INFO L87 Difference]: Start difference. First operand 161 states and 162 transitions. Second operand has 76 states, 76 states have (on average 2.039473684210526) internal successors, (155), 75 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:38,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:38,248 INFO L93 Difference]: Finished difference Result 174 states and 176 transitions. [2022-01-31 17:59:38,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-31 17:59:38,248 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.039473684210526) internal successors, (155), 75 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 160 [2022-01-31 17:59:38,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:38,248 INFO L225 Difference]: With dead ends: 174 [2022-01-31 17:59:38,249 INFO L226 Difference]: Without dead ends: 164 [2022-01-31 17:59:38,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2700 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=8325, Invalid=13727, Unknown=0, NotChecked=0, Total=22052 [2022-01-31 17:59:38,250 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 157 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:38,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 37 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:59:38,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-01-31 17:59:38,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 163. [2022-01-31 17:59:38,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 158 states have (on average 1.0126582278481013) internal successors, (160), 158 states have internal predecessors, (160), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:38,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 164 transitions. [2022-01-31 17:59:38,281 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 164 transitions. Word has length 160 [2022-01-31 17:59:38,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:38,281 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 164 transitions. [2022-01-31 17:59:38,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.039473684210526) internal successors, (155), 75 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:38,281 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 164 transitions. [2022-01-31 17:59:38,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-01-31 17:59:38,282 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:38,282 INFO L514 BasicCegarLoop]: trace histogram [73, 73, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:38,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-01-31 17:59:38,282 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:38,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:38,283 INFO L85 PathProgramCache]: Analyzing trace with hash -445460508, now seen corresponding path program 72 times [2022-01-31 17:59:38,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:38,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1608036216] [2022-01-31 17:59:38,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:38,284 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:38,284 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:38,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:38,287 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:38,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:39,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:39,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:39,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:59:39,452 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:39,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1608036216] [2022-01-31 17:59:39,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1608036216] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:39,452 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:39,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-01-31 17:59:39,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41871194] [2022-01-31 17:59:39,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:39,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-01-31 17:59:39,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:39,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-01-31 17:59:39,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 17:59:39,454 INFO L87 Difference]: Start difference. First operand 163 states and 164 transitions. Second operand has 77 states, 77 states have (on average 2.038961038961039) internal successors, (157), 76 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 17:59:40,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:40,909 INFO L93 Difference]: Finished difference Result 176 states and 178 transitions. [2022-01-31 17:59:40,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-31 17:59:40,910 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.038961038961039) internal successors, (157), 76 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 162 [2022-01-31 17:59:40,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:40,910 INFO L225 Difference]: With dead ends: 176 [2022-01-31 17:59:40,910 INFO L226 Difference]: Without dead ends: 166 [2022-01-31 17:59:40,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2774 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=8550, Invalid=14100, Unknown=0, NotChecked=0, Total=22650 [2022-01-31 17:59:40,912 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 159 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:40,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 52 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:59:40,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-01-31 17:59:40,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 165. [2022-01-31 17:59:40,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 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), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:40,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 166 transitions. [2022-01-31 17:59:40,945 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 166 transitions. Word has length 162 [2022-01-31 17:59:40,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:40,945 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 166 transitions. [2022-01-31 17:59:40,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.038961038961039) internal successors, (157), 76 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 17:59:40,945 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 166 transitions. [2022-01-31 17:59:40,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-01-31 17:59:40,945 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:40,946 INFO L514 BasicCegarLoop]: trace histogram [74, 74, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:40,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-01-31 17:59:40,946 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:40,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:40,946 INFO L85 PathProgramCache]: Analyzing trace with hash -16397178, now seen corresponding path program 73 times [2022-01-31 17:59:40,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:40,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2046578869] [2022-01-31 17:59:40,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:40,947 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:40,947 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:40,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:40,950 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:40,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:42,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:42,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:42,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:59:42,141 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:42,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2046578869] [2022-01-31 17:59:42,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2046578869] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:42,141 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:42,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-01-31 17:59:42,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371430632] [2022-01-31 17:59:42,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:42,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-01-31 17:59:42,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:42,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-01-31 17:59:42,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 17:59:42,142 INFO L87 Difference]: Start difference. First operand 165 states and 166 transitions. Second operand has 78 states, 78 states have (on average 2.0384615384615383) internal successors, (159), 77 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:43,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:43,656 INFO L93 Difference]: Finished difference Result 178 states and 180 transitions. [2022-01-31 17:59:43,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-31 17:59:43,657 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.0384615384615383) internal successors, (159), 77 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have 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 17:59:43,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:43,657 INFO L225 Difference]: With dead ends: 178 [2022-01-31 17:59:43,657 INFO L226 Difference]: Without dead ends: 168 [2022-01-31 17:59:43,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2849 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=8778, Invalid=14478, Unknown=0, NotChecked=0, Total=23256 [2022-01-31 17:59:43,660 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 161 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:43,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 32 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:59:43,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-01-31 17:59:43,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 167. [2022-01-31 17:59:43,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 162 states have (on average 1.0123456790123457) internal successors, (164), 162 states have internal predecessors, (164), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:43,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 168 transitions. [2022-01-31 17:59:43,712 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 168 transitions. Word has length 164 [2022-01-31 17:59:43,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:43,713 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 168 transitions. [2022-01-31 17:59:43,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.0384615384615383) internal successors, (159), 77 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:43,713 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 168 transitions. [2022-01-31 17:59:43,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-01-31 17:59:43,713 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:43,713 INFO L514 BasicCegarLoop]: trace histogram [75, 75, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:43,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-01-31 17:59:43,714 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:43,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:43,714 INFO L85 PathProgramCache]: Analyzing trace with hash -3397464, now seen corresponding path program 74 times [2022-01-31 17:59:43,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:43,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1458214609] [2022-01-31 17:59:43,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:43,719 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:43,719 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:43,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:43,722 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:43,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:44,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:44,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:44,834 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 17:59:44,834 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:44,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1458214609] [2022-01-31 17:59:44,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1458214609] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:44,834 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:44,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-01-31 17:59:44,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633432627] [2022-01-31 17:59:44,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:44,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-01-31 17:59:44,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:44,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-01-31 17:59:44,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3005, Invalid=3157, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 17:59:44,836 INFO L87 Difference]: Start difference. First operand 167 states and 168 transitions. Second operand has 79 states, 79 states have (on average 2.037974683544304) internal successors, (161), 78 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:46,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:46,414 INFO L93 Difference]: Finished difference Result 180 states and 182 transitions. [2022-01-31 17:59:46,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-31 17:59:46,414 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.037974683544304) internal successors, (161), 78 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 166 [2022-01-31 17:59:46,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:46,415 INFO L225 Difference]: With dead ends: 180 [2022-01-31 17:59:46,415 INFO L226 Difference]: Without dead ends: 170 [2022-01-31 17:59:46,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2925 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=9009, Invalid=14861, Unknown=0, NotChecked=0, Total=23870 [2022-01-31 17:59:46,416 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 163 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:46,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 57 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:59:46,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-01-31 17:59:46,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2022-01-31 17:59:46,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 164 states have (on average 1.0121951219512195) internal successors, (166), 164 states have internal predecessors, (166), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:46,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 170 transitions. [2022-01-31 17:59:46,450 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 170 transitions. Word has length 166 [2022-01-31 17:59:46,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:46,450 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 170 transitions. [2022-01-31 17:59:46,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.037974683544304) internal successors, (161), 78 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:46,450 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 170 transitions. [2022-01-31 17:59:46,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-01-31 17:59:46,451 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:46,451 INFO L514 BasicCegarLoop]: trace histogram [76, 76, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:46,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-01-31 17:59:46,451 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:46,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:46,451 INFO L85 PathProgramCache]: Analyzing trace with hash -395574198, now seen corresponding path program 75 times [2022-01-31 17:59:46,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:46,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [817654070] [2022-01-31 17:59:46,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:46,453 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:46,453 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:46,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:46,456 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:46,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:48,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:48,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:48,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:59:48,385 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:48,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [817654070] [2022-01-31 17:59:48,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [817654070] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:48,385 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:48,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-01-31 17:59:48,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404135542] [2022-01-31 17:59:48,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:48,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-01-31 17:59:48,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:48,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-01-31 17:59:48,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 17:59:48,387 INFO L87 Difference]: Start difference. First operand 169 states and 170 transitions. Second operand has 80 states, 80 states have (on average 2.0375) internal successors, (163), 79 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 17:59:50,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:50,113 INFO L93 Difference]: Finished difference Result 182 states and 184 transitions. [2022-01-31 17:59:50,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-01-31 17:59:50,114 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.0375) internal successors, (163), 79 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 168 [2022-01-31 17:59:50,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:50,114 INFO L225 Difference]: With dead ends: 182 [2022-01-31 17:59:50,114 INFO L226 Difference]: Without dead ends: 172 [2022-01-31 17:59:50,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3002 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=9243, Invalid=15249, Unknown=0, NotChecked=0, Total=24492 [2022-01-31 17:59:50,117 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 165 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:50,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 42 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:59:50,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-01-31 17:59:50,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 171. [2022-01-31 17:59:50,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 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), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:50,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 172 transitions. [2022-01-31 17:59:50,151 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 172 transitions. Word has length 168 [2022-01-31 17:59:50,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:50,151 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 172 transitions. [2022-01-31 17:59:50,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.0375) internal successors, (163), 79 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 17:59:50,151 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 172 transitions. [2022-01-31 17:59:50,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-01-31 17:59:50,152 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:50,152 INFO L514 BasicCegarLoop]: trace histogram [77, 77, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:50,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-01-31 17:59:50,152 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:50,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:50,152 INFO L85 PathProgramCache]: Analyzing trace with hash 679706476, now seen corresponding path program 76 times [2022-01-31 17:59:50,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:50,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [338259395] [2022-01-31 17:59:50,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:50,153 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:50,154 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:50,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:50,157 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:50,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:51,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:51,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:51,859 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 17:59:51,859 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:51,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [338259395] [2022-01-31 17:59:51,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [338259395] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:51,859 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:51,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-01-31 17:59:51,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78566280] [2022-01-31 17:59:51,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:51,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-01-31 17:59:51,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:51,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-01-31 17:59:51,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3162, Invalid=3318, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 17:59:51,861 INFO L87 Difference]: Start difference. First operand 171 states and 172 transitions. Second operand has 81 states, 81 states have (on average 2.037037037037037) internal successors, (165), 80 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:53,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:53,545 INFO L93 Difference]: Finished difference Result 184 states and 186 transitions. [2022-01-31 17:59:53,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-01-31 17:59:53,545 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.037037037037037) internal successors, (165), 80 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have 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 17:59:53,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:53,546 INFO L225 Difference]: With dead ends: 184 [2022-01-31 17:59:53,546 INFO L226 Difference]: Without dead ends: 174 [2022-01-31 17:59:53,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3080 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=9480, Invalid=15642, Unknown=0, NotChecked=0, Total=25122 [2022-01-31 17:59:53,547 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 167 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:53,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 37 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:59:53,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-01-31 17:59:53,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 173. [2022-01-31 17:59:53,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 168 states have (on average 1.0119047619047619) internal successors, (170), 168 states have internal predecessors, (170), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:53,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 174 transitions. [2022-01-31 17:59:53,582 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 174 transitions. Word has length 170 [2022-01-31 17:59:53,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:53,582 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 174 transitions. [2022-01-31 17:59:53,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.037037037037037) internal successors, (165), 80 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:53,582 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 174 transitions. [2022-01-31 17:59:53,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-01-31 17:59:53,583 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:53,583 INFO L514 BasicCegarLoop]: trace histogram [78, 78, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:53,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-01-31 17:59:53,583 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:53,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:53,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1062684146, now seen corresponding path program 77 times [2022-01-31 17:59:53,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:53,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1593191150] [2022-01-31 17:59:53,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:53,585 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:53,585 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:53,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:53,588 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:53,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:54,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:54,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:54,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:59:54,802 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:54,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1593191150] [2022-01-31 17:59:54,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1593191150] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:54,802 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:54,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-01-31 17:59:54,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808899890] [2022-01-31 17:59:54,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:54,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-01-31 17:59:54,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:54,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-01-31 17:59:54,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2022-01-31 17:59:54,804 INFO L87 Difference]: Start difference. First operand 173 states and 174 transitions. Second operand has 82 states, 82 states have (on average 2.0365853658536586) internal successors, (167), 81 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:56,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:56,364 INFO L93 Difference]: Finished difference Result 186 states and 188 transitions. [2022-01-31 17:59:56,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-31 17:59:56,364 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.0365853658536586) internal successors, (167), 81 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 172 [2022-01-31 17:59:56,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:56,365 INFO L225 Difference]: With dead ends: 186 [2022-01-31 17:59:56,365 INFO L226 Difference]: Without dead ends: 176 [2022-01-31 17:59:56,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3159 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=9720, Invalid=16040, Unknown=0, NotChecked=0, Total=25760 [2022-01-31 17:59:56,367 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 169 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:56,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 42 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:59:56,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-01-31 17:59:56,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 175. [2022-01-31 17:59:56,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 170 states have (on average 1.011764705882353) internal successors, (172), 170 states have internal predecessors, (172), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:56,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 176 transitions. [2022-01-31 17:59:56,416 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 176 transitions. Word has length 172 [2022-01-31 17:59:56,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:56,416 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 176 transitions. [2022-01-31 17:59:56,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.0365853658536586) internal successors, (167), 81 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:56,416 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 176 transitions. [2022-01-31 17:59:56,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-01-31 17:59:56,417 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:56,417 INFO L514 BasicCegarLoop]: trace histogram [79, 79, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:56,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-01-31 17:59:56,417 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:56,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:56,417 INFO L85 PathProgramCache]: Analyzing trace with hash -462826448, now seen corresponding path program 78 times [2022-01-31 17:59:56,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:56,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [379506103] [2022-01-31 17:59:56,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:56,418 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:56,418 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:56,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:56,422 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:56,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:57,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:57,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:57,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:59:57,890 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:57,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [379506103] [2022-01-31 17:59:57,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [379506103] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:57,890 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:57,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-01-31 17:59:57,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347760316] [2022-01-31 17:59:57,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:57,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-01-31 17:59:57,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:57,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-01-31 17:59:57,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3323, Invalid=3483, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 17:59:57,892 INFO L87 Difference]: Start difference. First operand 175 states and 176 transitions. Second operand has 83 states, 83 states have (on average 2.036144578313253) internal successors, (169), 82 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 17:59:59,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:59,575 INFO L93 Difference]: Finished difference Result 188 states and 190 transitions. [2022-01-31 17:59:59,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-01-31 17:59:59,576 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.036144578313253) internal successors, (169), 82 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 174 [2022-01-31 17:59:59,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:59,576 INFO L225 Difference]: With dead ends: 188 [2022-01-31 17:59:59,576 INFO L226 Difference]: Without dead ends: 178 [2022-01-31 17:59:59,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3239 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=9963, Invalid=16443, Unknown=0, NotChecked=0, Total=26406 [2022-01-31 17:59:59,578 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 171 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:59,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 52 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:59:59,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-01-31 17:59:59,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 177. [2022-01-31 17:59:59,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 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), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:59,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 178 transitions. [2022-01-31 17:59:59,619 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 178 transitions. Word has length 174 [2022-01-31 17:59:59,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:59,620 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 178 transitions. [2022-01-31 17:59:59,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.036144578313253) internal successors, (169), 82 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 17:59:59,620 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 178 transitions. [2022-01-31 17:59:59,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-01-31 17:59:59,621 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:59,621 INFO L514 BasicCegarLoop]: trace histogram [80, 80, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:59,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-01-31 17:59:59,621 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:59,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:59,622 INFO L85 PathProgramCache]: Analyzing trace with hash 474803666, now seen corresponding path program 79 times [2022-01-31 17:59:59,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:59,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [372649584] [2022-01-31 17:59:59,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:59,625 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:59,625 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:59,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:59,629 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:59,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:01,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:00:01,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:01,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:00:01,287 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:00:01,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [372649584] [2022-01-31 18:00:01,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [372649584] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:00:01,287 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:00:01,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-01-31 18:00:01,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206624216] [2022-01-31 18:00:01,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:00:01,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-01-31 18:00:01,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:00:01,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-01-31 18:00:01,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 18:00:01,290 INFO L87 Difference]: Start difference. First operand 177 states and 178 transitions. Second operand has 84 states, 84 states have (on average 2.0357142857142856) internal successors, (171), 83 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:00:03,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:00:03,230 INFO L93 Difference]: Finished difference Result 190 states and 192 transitions. [2022-01-31 18:00:03,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-31 18:00:03,230 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.0357142857142856) internal successors, (171), 83 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have 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 18:00:03,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:00:03,231 INFO L225 Difference]: With dead ends: 190 [2022-01-31 18:00:03,231 INFO L226 Difference]: Without dead ends: 180 [2022-01-31 18:00:03,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3320 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=10209, Invalid=16851, Unknown=0, NotChecked=0, Total=27060 [2022-01-31 18:00:03,234 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 173 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:00:03,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 57 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:00:03,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-01-31 18:00:03,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 179. [2022-01-31 18:00:03,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 174 states have (on average 1.0114942528735633) internal successors, (176), 174 states have internal predecessors, (176), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:00:03,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 180 transitions. [2022-01-31 18:00:03,275 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 180 transitions. Word has length 176 [2022-01-31 18:00:03,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:00:03,275 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 180 transitions. [2022-01-31 18:00:03,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.0357142857142856) internal successors, (171), 83 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:00:03,275 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 180 transitions. [2022-01-31 18:00:03,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-01-31 18:00:03,276 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:00:03,276 INFO L514 BasicCegarLoop]: trace histogram [81, 81, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:00:03,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-01-31 18:00:03,276 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:00:03,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:00:03,276 INFO L85 PathProgramCache]: Analyzing trace with hash -405788940, now seen corresponding path program 80 times [2022-01-31 18:00:03,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:00:03,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1176999140] [2022-01-31 18:00:03,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:00:03,278 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:00:03,278 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:00:03,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:00:03,282 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:00:03,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:04,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:00:04,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:04,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:00:04,777 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:00:04,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1176999140] [2022-01-31 18:00:04,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1176999140] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:00:04,777 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:00:04,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-01-31 18:00:04,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968438255] [2022-01-31 18:00:04,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:00:04,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-01-31 18:00:04,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:00:04,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-01-31 18:00:04,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3488, Invalid=3652, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 18:00:04,780 INFO L87 Difference]: Start difference. First operand 179 states and 180 transitions. Second operand has 85 states, 85 states have (on average 2.0352941176470587) internal successors, (173), 84 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:00:07,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:00:07,511 INFO L93 Difference]: Finished difference Result 192 states and 194 transitions. [2022-01-31 18:00:07,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-01-31 18:00:07,512 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.0352941176470587) internal successors, (173), 84 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 178 [2022-01-31 18:00:07,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:00:07,512 INFO L225 Difference]: With dead ends: 192 [2022-01-31 18:00:07,512 INFO L226 Difference]: Without dead ends: 182 [2022-01-31 18:00:07,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3402 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=10458, Invalid=17264, Unknown=0, NotChecked=0, Total=27722 [2022-01-31 18:00:07,514 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 175 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:00:07,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 52 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:00:07,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-01-31 18:00:07,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 181. [2022-01-31 18:00:07,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 176 states have (on average 1.0113636363636365) internal successors, (178), 176 states have internal predecessors, (178), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:00:07,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 182 transitions. [2022-01-31 18:00:07,569 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 182 transitions. Word has length 178 [2022-01-31 18:00:07,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:00:07,569 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 182 transitions. [2022-01-31 18:00:07,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.0352941176470587) internal successors, (173), 84 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:00:07,569 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 182 transitions. [2022-01-31 18:00:07,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-01-31 18:00:07,570 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:00:07,570 INFO L514 BasicCegarLoop]: trace histogram [82, 82, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:00:07,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-01-31 18:00:07,570 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:00:07,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:00:07,571 INFO L85 PathProgramCache]: Analyzing trace with hash -546725994, now seen corresponding path program 81 times [2022-01-31 18:00:07,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:00:07,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1250763786] [2022-01-31 18:00:07,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:00:07,572 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:00:07,572 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:00:07,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:00:07,577 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:00:07,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:09,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:00:09,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:09,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:00:09,982 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:00:09,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1250763786] [2022-01-31 18:00:09,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1250763786] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:00:09,982 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:00:09,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-01-31 18:00:09,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092704695] [2022-01-31 18:00:09,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:00:09,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-01-31 18:00:09,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:00:09,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-01-31 18:00:09,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2022-01-31 18:00:09,983 INFO L87 Difference]: Start difference. First operand 181 states and 182 transitions. Second operand has 86 states, 86 states have (on average 2.0348837209302326) internal successors, (175), 85 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 18:00:12,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:00:12,762 INFO L93 Difference]: Finished difference Result 194 states and 196 transitions. [2022-01-31 18:00:12,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-31 18:00:12,763 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.0348837209302326) internal successors, (175), 85 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 180 [2022-01-31 18:00:12,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:00:12,764 INFO L225 Difference]: With dead ends: 194 [2022-01-31 18:00:12,764 INFO L226 Difference]: Without dead ends: 184 [2022-01-31 18:00:12,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3485 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=10710, Invalid=17682, Unknown=0, NotChecked=0, Total=28392 [2022-01-31 18:00:12,767 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 177 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:00:12,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 37 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:00:12,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-01-31 18:00:12,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 183. [2022-01-31 18:00:12,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 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), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:00:12,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 184 transitions. [2022-01-31 18:00:12,829 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 184 transitions. Word has length 180 [2022-01-31 18:00:12,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:00:12,829 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 184 transitions. [2022-01-31 18:00:12,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.0348837209302326) internal successors, (175), 85 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 18:00:12,830 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 184 transitions. [2022-01-31 18:00:12,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-01-31 18:00:12,830 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:00:12,830 INFO L514 BasicCegarLoop]: trace histogram [83, 83, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:00:12,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-01-31 18:00:12,830 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:00:12,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:00:12,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1451718584, now seen corresponding path program 82 times [2022-01-31 18:00:12,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:00:12,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1170369068] [2022-01-31 18:00:12,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:00:12,833 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:00:12,833 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:00:12,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:00:12,839 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:00:12,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:14,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:00:14,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:14,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:00:14,467 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:00:14,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1170369068] [2022-01-31 18:00:14,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1170369068] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:00:14,468 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:00:14,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-01-31 18:00:14,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330631679] [2022-01-31 18:00:14,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:00:14,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-01-31 18:00:14,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:00:14,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-01-31 18:00:14,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3657, Invalid=3825, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 18:00:14,470 INFO L87 Difference]: Start difference. First operand 183 states and 184 transitions. Second operand has 87 states, 87 states have (on average 2.0344827586206895) internal successors, (177), 86 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:00:16,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:00:16,938 INFO L93 Difference]: Finished difference Result 196 states and 198 transitions. [2022-01-31 18:00:16,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-01-31 18:00:16,938 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.0344827586206895) internal successors, (177), 86 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have 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 18:00:16,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:00:16,939 INFO L225 Difference]: With dead ends: 196 [2022-01-31 18:00:16,939 INFO L226 Difference]: Without dead ends: 186 [2022-01-31 18:00:16,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3569 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=10965, Invalid=18105, Unknown=0, NotChecked=0, Total=29070 [2022-01-31 18:00:16,941 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 179 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:00:16,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 47 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:00:16,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-01-31 18:00:16,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 185. [2022-01-31 18:00:16,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 180 states have (on average 1.011111111111111) internal successors, (182), 180 states have internal predecessors, (182), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:00:16,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 186 transitions. [2022-01-31 18:00:16,984 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 186 transitions. Word has length 182 [2022-01-31 18:00:16,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:00:16,984 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 186 transitions. [2022-01-31 18:00:16,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 2.0344827586206895) internal successors, (177), 86 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:00:16,988 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 186 transitions. [2022-01-31 18:00:16,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-01-31 18:00:16,989 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:00:16,989 INFO L514 BasicCegarLoop]: trace histogram [84, 84, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:00:16,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-01-31 18:00:16,989 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:00:16,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:00:16,989 INFO L85 PathProgramCache]: Analyzing trace with hash 2106576730, now seen corresponding path program 83 times [2022-01-31 18:00:16,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:00:16,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [855968216] [2022-01-31 18:00:16,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:00:16,991 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:00:16,991 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:00:16,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:00:16,995 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:00:17,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:19,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:00:19,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:19,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:00:19,099 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:00:19,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [855968216] [2022-01-31 18:00:19,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [855968216] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:00:19,099 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:00:19,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-01-31 18:00:19,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900688759] [2022-01-31 18:00:19,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:00:19,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-01-31 18:00:19,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:00:19,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-01-31 18:00:19,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2022-01-31 18:00:19,102 INFO L87 Difference]: Start difference. First operand 185 states and 186 transitions. Second operand has 88 states, 88 states have (on average 2.034090909090909) internal successors, (179), 87 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:00:21,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:00:21,431 INFO L93 Difference]: Finished difference Result 198 states and 200 transitions. [2022-01-31 18:00:21,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-01-31 18:00:21,431 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.034090909090909) internal successors, (179), 87 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 184 [2022-01-31 18:00:21,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:00:21,432 INFO L225 Difference]: With dead ends: 198 [2022-01-31 18:00:21,432 INFO L226 Difference]: Without dead ends: 188 [2022-01-31 18:00:21,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3654 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=11223, Invalid=18533, Unknown=0, NotChecked=0, Total=29756 [2022-01-31 18:00:21,434 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 181 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:00:21,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 42 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:00:21,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-01-31 18:00:21,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 187. [2022-01-31 18:00:21,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 182 states have (on average 1.010989010989011) internal successors, (184), 182 states have internal predecessors, (184), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:00:21,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 188 transitions. [2022-01-31 18:00:21,477 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 188 transitions. Word has length 184 [2022-01-31 18:00:21,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:00:21,477 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 188 transitions. [2022-01-31 18:00:21,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 2.034090909090909) internal successors, (179), 87 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:00:21,478 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 188 transitions. [2022-01-31 18:00:21,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-01-31 18:00:21,478 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:00:21,478 INFO L514 BasicCegarLoop]: trace histogram [85, 85, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:00:21,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-01-31 18:00:21,478 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:00:21,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:00:21,479 INFO L85 PathProgramCache]: Analyzing trace with hash 65062524, now seen corresponding path program 84 times [2022-01-31 18:00:21,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:00:21,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1560722350] [2022-01-31 18:00:21,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:00:21,480 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:00:21,480 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:00:21,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:00:21,484 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:00:21,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:24,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:00:24,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:24,285 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 18:00:24,286 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:00:24,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1560722350] [2022-01-31 18:00:24,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1560722350] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:00:24,286 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:00:24,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-01-31 18:00:24,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122717480] [2022-01-31 18:00:24,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:00:24,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-01-31 18:00:24,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:00:24,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-01-31 18:00:24,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3830, Invalid=4002, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 18:00:24,288 INFO L87 Difference]: Start difference. First operand 187 states and 188 transitions. Second operand has 89 states, 89 states have (on average 2.033707865168539) internal successors, (181), 88 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 18:00:26,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:00:26,828 INFO L93 Difference]: Finished difference Result 200 states and 202 transitions. [2022-01-31 18:00:26,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-31 18:00:26,828 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.033707865168539) internal successors, (181), 88 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 186 [2022-01-31 18:00:26,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:00:26,829 INFO L225 Difference]: With dead ends: 200 [2022-01-31 18:00:26,829 INFO L226 Difference]: Without dead ends: 190 [2022-01-31 18:00:26,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3740 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=11484, Invalid=18966, Unknown=0, NotChecked=0, Total=30450 [2022-01-31 18:00:26,843 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 183 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:00:26,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 42 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:00:26,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-01-31 18:00:26,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 189. [2022-01-31 18:00:26,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 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), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:00:26,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 190 transitions. [2022-01-31 18:00:26,934 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 190 transitions. Word has length 186 [2022-01-31 18:00:26,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:00:26,934 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 190 transitions. [2022-01-31 18:00:26,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.033707865168539) internal successors, (181), 88 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 18:00:26,934 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 190 transitions. [2022-01-31 18:00:26,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-01-31 18:00:26,935 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:00:26,943 INFO L514 BasicCegarLoop]: trace histogram [86, 86, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:00:26,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-01-31 18:00:26,943 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:00:26,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:00:26,943 INFO L85 PathProgramCache]: Analyzing trace with hash 969964830, now seen corresponding path program 85 times [2022-01-31 18:00:26,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:00:26,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [540036059] [2022-01-31 18:00:26,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:00:26,945 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:00:26,945 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:00:26,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:00:26,949 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:00:26,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:28,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:00:28,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:28,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:00:28,671 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:00:28,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [540036059] [2022-01-31 18:00:28,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [540036059] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:00:28,671 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:00:28,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-01-31 18:00:28,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626606139] [2022-01-31 18:00:28,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:00:28,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-01-31 18:00:28,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:00:28,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-01-31 18:00:28,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3918, Invalid=4092, Unknown=0, NotChecked=0, Total=8010 [2022-01-31 18:00:28,674 INFO L87 Difference]: Start difference. First operand 189 states and 190 transitions. Second operand has 90 states, 90 states have (on average 2.033333333333333) internal successors, (183), 89 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:00:30,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:00:30,840 INFO L93 Difference]: Finished difference Result 202 states and 204 transitions. [2022-01-31 18:00:30,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-01-31 18:00:30,840 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.033333333333333) internal successors, (183), 89 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have 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 18:00:30,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:00:30,841 INFO L225 Difference]: With dead ends: 202 [2022-01-31 18:00:30,841 INFO L226 Difference]: Without dead ends: 192 [2022-01-31 18:00:30,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3827 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=11748, Invalid=19404, Unknown=0, NotChecked=0, Total=31152 [2022-01-31 18:00:30,845 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 185 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:00:30,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 37 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:00:30,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-01-31 18:00:30,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 191. [2022-01-31 18:00:30,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 186 states have (on average 1.010752688172043) internal successors, (188), 186 states have internal predecessors, (188), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:00:30,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 192 transitions. [2022-01-31 18:00:30,917 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 192 transitions. Word has length 188 [2022-01-31 18:00:30,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:00:30,918 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 192 transitions. [2022-01-31 18:00:30,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.033333333333333) internal successors, (183), 89 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:00:30,918 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 192 transitions. [2022-01-31 18:00:30,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-01-31 18:00:30,918 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:00:30,918 INFO L514 BasicCegarLoop]: trace histogram [87, 87, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:00:30,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-01-31 18:00:30,919 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:00:30,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:00:30,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1297280192, now seen corresponding path program 86 times [2022-01-31 18:00:30,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:00:30,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1368858961] [2022-01-31 18:00:30,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:00:30,920 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:00:30,920 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:00:30,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:00:30,924 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:00:30,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:32,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:00:32,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:32,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:00:32,495 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:00:32,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1368858961] [2022-01-31 18:00:32,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1368858961] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:00:32,495 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:00:32,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-01-31 18:00:32,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638843434] [2022-01-31 18:00:32,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:00:32,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-01-31 18:00:32,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:00:32,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-01-31 18:00:32,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4007, Invalid=4183, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 18:00:32,503 INFO L87 Difference]: Start difference. First operand 191 states and 192 transitions. Second operand has 91 states, 91 states have (on average 2.032967032967033) internal successors, (185), 90 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:00:34,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:00:34,865 INFO L93 Difference]: Finished difference Result 204 states and 206 transitions. [2022-01-31 18:00:34,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-01-31 18:00:34,865 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.032967032967033) internal successors, (185), 90 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 190 [2022-01-31 18:00:34,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:00:34,866 INFO L225 Difference]: With dead ends: 204 [2022-01-31 18:00:34,866 INFO L226 Difference]: Without dead ends: 194 [2022-01-31 18:00:34,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3915 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=12015, Invalid=19847, Unknown=0, NotChecked=0, Total=31862 [2022-01-31 18:00:34,869 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 187 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:00:34,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 52 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:00:34,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-01-31 18:00:34,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 193. [2022-01-31 18:00:34,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 188 states have (on average 1.0106382978723405) internal successors, (190), 188 states have internal predecessors, (190), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:00:34,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 194 transitions. [2022-01-31 18:00:34,923 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 194 transitions. Word has length 190 [2022-01-31 18:00:34,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:00:34,923 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 194 transitions. [2022-01-31 18:00:34,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.032967032967033) internal successors, (185), 90 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:00:34,923 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 194 transitions. [2022-01-31 18:00:34,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-01-31 18:00:34,931 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:00:34,931 INFO L514 BasicCegarLoop]: trace histogram [88, 88, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:00:34,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-01-31 18:00:34,936 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:00:34,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:00:34,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1723640034, now seen corresponding path program 87 times [2022-01-31 18:00:34,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:00:34,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [842572195] [2022-01-31 18:00:34,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:00:34,938 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:00:34,938 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:00:34,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:00:34,943 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:00:34,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:37,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:00:37,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:37,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:00:37,508 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:00:37,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [842572195] [2022-01-31 18:00:37,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [842572195] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:00:37,508 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:00:37,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-01-31 18:00:37,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932137218] [2022-01-31 18:00:37,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:00:37,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-01-31 18:00:37,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:00:37,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-01-31 18:00:37,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2022-01-31 18:00:37,510 INFO L87 Difference]: Start difference. First operand 193 states and 194 transitions. Second operand has 92 states, 92 states have (on average 2.032608695652174) internal successors, (187), 91 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 18:00:40,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:00:40,138 INFO L93 Difference]: Finished difference Result 206 states and 208 transitions. [2022-01-31 18:00:40,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-01-31 18:00:40,138 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.032608695652174) internal successors, (187), 91 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 192 [2022-01-31 18:00:40,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:00:40,138 INFO L225 Difference]: With dead ends: 206 [2022-01-31 18:00:40,138 INFO L226 Difference]: Without dead ends: 196 [2022-01-31 18:00:40,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4004 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=12285, Invalid=20295, Unknown=0, NotChecked=0, Total=32580 [2022-01-31 18:00:40,140 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 189 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:00:40,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 42 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:00:40,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-01-31 18:00:40,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 195. [2022-01-31 18:00:40,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 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), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:00:40,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 196 transitions. [2022-01-31 18:00:40,186 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 196 transitions. Word has length 192 [2022-01-31 18:00:40,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:00:40,186 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 196 transitions. [2022-01-31 18:00:40,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.032608695652174) internal successors, (187), 91 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 18:00:40,187 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 196 transitions. [2022-01-31 18:00:40,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-01-31 18:00:40,187 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:00:40,187 INFO L514 BasicCegarLoop]: trace histogram [89, 89, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:00:40,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2022-01-31 18:00:40,187 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:00:40,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:00:40,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1430085124, now seen corresponding path program 88 times [2022-01-31 18:00:40,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:00:40,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1303514930] [2022-01-31 18:00:40,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:00:40,189 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:00:40,189 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:00:40,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:00:40,193 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:00:40,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:42,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:00:42,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:42,344 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 18:00:42,344 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:00:42,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1303514930] [2022-01-31 18:00:42,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1303514930] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:00:42,345 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:00:42,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-01-31 18:00:42,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761160634] [2022-01-31 18:00:42,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:00:42,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-01-31 18:00:42,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:00:42,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-01-31 18:00:42,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4188, Invalid=4368, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 18:00:42,348 INFO L87 Difference]: Start difference. First operand 195 states and 196 transitions. Second operand has 93 states, 93 states have (on average 2.032258064516129) internal successors, (189), 92 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:00:45,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:00:45,257 INFO L93 Difference]: Finished difference Result 208 states and 210 transitions. [2022-01-31 18:00:45,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-01-31 18:00:45,257 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 2.032258064516129) internal successors, (189), 92 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have 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 18:00:45,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:00:45,258 INFO L225 Difference]: With dead ends: 208 [2022-01-31 18:00:45,258 INFO L226 Difference]: Without dead ends: 198 [2022-01-31 18:00:45,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4094 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=12558, Invalid=20748, Unknown=0, NotChecked=0, Total=33306 [2022-01-31 18:00:45,260 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 191 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:00:45,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 32 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:00:45,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-01-31 18:00:45,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 197. [2022-01-31 18:00:45,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 192 states have (on average 1.0104166666666667) internal successors, (194), 192 states have internal predecessors, (194), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:00:45,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 198 transitions. [2022-01-31 18:00:45,307 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 198 transitions. Word has length 194 [2022-01-31 18:00:45,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:00:45,308 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 198 transitions. [2022-01-31 18:00:45,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 2.032258064516129) internal successors, (189), 92 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:00:45,308 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 198 transitions. [2022-01-31 18:00:45,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-01-31 18:00:45,308 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:00:45,308 INFO L514 BasicCegarLoop]: trace histogram [90, 90, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:00:45,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2022-01-31 18:00:45,309 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:00:45,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:00:45,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1503309146, now seen corresponding path program 89 times [2022-01-31 18:00:45,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:00:45,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1692874220] [2022-01-31 18:00:45,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:00:45,310 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:00:45,310 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:00:45,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:00:45,315 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:00:45,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:48,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:00:48,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:48,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:00:48,010 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:00:48,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1692874220] [2022-01-31 18:00:48,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1692874220] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:00:48,010 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:00:48,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-01-31 18:00:48,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878109659] [2022-01-31 18:00:48,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:00:48,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-01-31 18:00:48,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:00:48,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-01-31 18:00:48,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4280, Invalid=4462, Unknown=0, NotChecked=0, Total=8742 [2022-01-31 18:00:48,012 INFO L87 Difference]: Start difference. First operand 197 states and 198 transitions. Second operand has 94 states, 94 states have (on average 2.0319148936170213) internal successors, (191), 93 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:00:50,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:00:50,844 INFO L93 Difference]: Finished difference Result 210 states and 212 transitions. [2022-01-31 18:00:50,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-01-31 18:00:50,844 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.0319148936170213) internal successors, (191), 93 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 196 [2022-01-31 18:00:50,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:00:50,845 INFO L225 Difference]: With dead ends: 210 [2022-01-31 18:00:50,845 INFO L226 Difference]: Without dead ends: 200 [2022-01-31 18:00:50,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4185 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=12834, Invalid=21206, Unknown=0, NotChecked=0, Total=34040 [2022-01-31 18:00:50,847 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 193 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:00:50,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 37 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:00:50,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-01-31 18:00:50,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 199. [2022-01-31 18:00:50,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 194 states have (on average 1.0103092783505154) internal successors, (196), 194 states have internal predecessors, (196), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:00:50,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 200 transitions. [2022-01-31 18:00:50,896 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 200 transitions. Word has length 196 [2022-01-31 18:00:50,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:00:50,897 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 200 transitions. [2022-01-31 18:00:50,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 2.0319148936170213) internal successors, (191), 93 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:00:50,897 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 200 transitions. [2022-01-31 18:00:50,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2022-01-31 18:00:50,897 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:00:50,897 INFO L514 BasicCegarLoop]: trace histogram [91, 91, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:00:50,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2022-01-31 18:00:50,898 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:00:50,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:00:50,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1298310856, now seen corresponding path program 90 times [2022-01-31 18:00:50,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:00:50,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [342344411] [2022-01-31 18:00:50,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:00:50,899 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:00:50,899 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:00:50,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:00:50,904 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:00:50,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:52,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:00:52,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:52,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:00:52,951 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:00:52,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [342344411] [2022-01-31 18:00:52,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [342344411] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:00:52,951 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:00:52,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-01-31 18:00:52,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130783908] [2022-01-31 18:00:52,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:00:52,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-01-31 18:00:52,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:00:52,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-01-31 18:00:52,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4373, Invalid=4557, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 18:00:52,953 INFO L87 Difference]: Start difference. First operand 199 states and 200 transitions. Second operand has 95 states, 95 states have (on average 2.031578947368421) internal successors, (193), 94 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 18:00:56,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:00:56,001 INFO L93 Difference]: Finished difference Result 212 states and 214 transitions. [2022-01-31 18:00:56,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-01-31 18:00:56,002 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.031578947368421) internal successors, (193), 94 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 198 [2022-01-31 18:00:56,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:00:56,002 INFO L225 Difference]: With dead ends: 212 [2022-01-31 18:00:56,002 INFO L226 Difference]: Without dead ends: 202 [2022-01-31 18:00:56,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4277 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=13113, Invalid=21669, Unknown=0, NotChecked=0, Total=34782 [2022-01-31 18:00:56,004 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 195 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:00:56,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 37 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:00:56,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-01-31 18:00:56,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 201. [2022-01-31 18:00:56,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 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), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:00:56,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 202 transitions. [2022-01-31 18:00:56,057 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 202 transitions. Word has length 198 [2022-01-31 18:00:56,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:00:56,057 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 202 transitions. [2022-01-31 18:00:56,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.031578947368421) internal successors, (193), 94 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 18:00:56,057 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 202 transitions. [2022-01-31 18:00:56,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2022-01-31 18:00:56,064 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:00:56,064 INFO L514 BasicCegarLoop]: trace histogram [92, 92, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:00:56,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2022-01-31 18:00:56,064 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:00:56,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:00:56,064 INFO L85 PathProgramCache]: Analyzing trace with hash 710638186, now seen corresponding path program 91 times [2022-01-31 18:00:56,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:00:56,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [606694316] [2022-01-31 18:00:56,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:00:56,066 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:00:56,066 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:00:56,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:00:56,072 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:00:56,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:58,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:00:58,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:58,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:00:58,128 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:00:58,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [606694316] [2022-01-31 18:00:58,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [606694316] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:00:58,129 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:00:58,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-01-31 18:00:58,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725619074] [2022-01-31 18:00:58,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:00:58,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-01-31 18:00:58,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:00:58,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-01-31 18:00:58,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2022-01-31 18:00:58,131 INFO L87 Difference]: Start difference. First operand 201 states and 202 transitions. Second operand has 96 states, 96 states have (on average 2.03125) internal successors, (195), 95 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:01:00,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:01:00,656 INFO L93 Difference]: Finished difference Result 214 states and 216 transitions. [2022-01-31 18:01:00,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-01-31 18:01:00,671 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.03125) internal successors, (195), 95 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have 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 18:01:00,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:01:00,672 INFO L225 Difference]: With dead ends: 214 [2022-01-31 18:01:00,672 INFO L226 Difference]: Without dead ends: 204 [2022-01-31 18:01:00,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4370 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=13395, Invalid=22137, Unknown=0, NotChecked=0, Total=35532 [2022-01-31 18:01:00,674 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 197 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:01:00,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 47 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:01:00,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-01-31 18:01:00,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 203. [2022-01-31 18:01:00,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 198 states have (on average 1.0101010101010102) internal successors, (200), 198 states have internal predecessors, (200), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:01:00,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 204 transitions. [2022-01-31 18:01:00,724 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 204 transitions. Word has length 200 [2022-01-31 18:01:00,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:01:00,724 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 204 transitions. [2022-01-31 18:01:00,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.03125) internal successors, (195), 95 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:01:00,724 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 204 transitions. [2022-01-31 18:01:00,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2022-01-31 18:01:00,725 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:01:00,725 INFO L514 BasicCegarLoop]: trace histogram [93, 93, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:01:00,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2022-01-31 18:01:00,725 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:01:00,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:01:00,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1402081908, now seen corresponding path program 92 times [2022-01-31 18:01:00,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:01:00,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1518038156] [2022-01-31 18:01:00,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:01:00,727 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:01:00,727 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:01:00,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:01:00,731 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:01:00,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:03,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:01:03,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:03,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:01:03,115 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:01:03,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1518038156] [2022-01-31 18:01:03,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1518038156] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:01:03,115 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:01:03,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-01-31 18:01:03,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786515799] [2022-01-31 18:01:03,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:01:03,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-01-31 18:01:03,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:01:03,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-01-31 18:01:03,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4562, Invalid=4750, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 18:01:03,118 INFO L87 Difference]: Start difference. First operand 203 states and 204 transitions. Second operand has 97 states, 97 states have (on average 2.0309278350515463) internal successors, (197), 96 states have internal predecessors, (197), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:01:06,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:01:06,460 INFO L93 Difference]: Finished difference Result 216 states and 218 transitions. [2022-01-31 18:01:06,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-31 18:01:06,461 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.0309278350515463) internal successors, (197), 96 states have internal predecessors, (197), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 202 [2022-01-31 18:01:06,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:01:06,461 INFO L225 Difference]: With dead ends: 216 [2022-01-31 18:01:06,461 INFO L226 Difference]: Without dead ends: 206 [2022-01-31 18:01:06,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4464 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=13680, Invalid=22610, Unknown=0, NotChecked=0, Total=36290 [2022-01-31 18:01:06,463 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 199 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:01:06,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 32 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:01:06,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-01-31 18:01:06,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 205. [2022-01-31 18:01:06,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 200 states have (on average 1.01) internal successors, (202), 200 states have internal predecessors, (202), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:01:06,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 206 transitions. [2022-01-31 18:01:06,515 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 206 transitions. Word has length 202 [2022-01-31 18:01:06,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:01:06,515 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 206 transitions. [2022-01-31 18:01:06,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.0309278350515463) internal successors, (197), 96 states have internal predecessors, (197), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:01:06,515 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 206 transitions. [2022-01-31 18:01:06,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-01-31 18:01:06,515 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:01:06,516 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:01:06,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2022-01-31 18:01:06,516 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:01:06,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:01:06,516 INFO L85 PathProgramCache]: Analyzing trace with hash -206561234, now seen corresponding path program 93 times [2022-01-31 18:01:06,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:01:06,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1338446190] [2022-01-31 18:01:06,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:01:06,517 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:01:06,518 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:01:06,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:01:06,522 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:01:06,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:08,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:01:08,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:08,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:01:08,551 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:01:08,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1338446190] [2022-01-31 18:01:08,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1338446190] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:01:08,551 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:01:08,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-01-31 18:01:08,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911210546] [2022-01-31 18:01:08,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:01:08,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-01-31 18:01:08,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:01:08,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-01-31 18:01:08,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 18:01:08,554 INFO L87 Difference]: Start difference. First operand 205 states and 206 transitions. Second operand has 98 states, 98 states have (on average 2.0306122448979593) internal successors, (199), 97 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 18:01:11,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:01:11,184 INFO L93 Difference]: Finished difference Result 218 states and 220 transitions. [2022-01-31 18:01:11,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-01-31 18:01:11,184 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.0306122448979593) internal successors, (199), 97 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 204 [2022-01-31 18:01:11,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:01:11,185 INFO L225 Difference]: With dead ends: 218 [2022-01-31 18:01:11,185 INFO L226 Difference]: Without dead ends: 208 [2022-01-31 18:01:11,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4559 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=13968, Invalid=23088, Unknown=0, NotChecked=0, Total=37056 [2022-01-31 18:01:11,187 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 201 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:01:11,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 42 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:01:11,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-01-31 18:01:11,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 207. [2022-01-31 18:01:11,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 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), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:01:11,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 208 transitions. [2022-01-31 18:01:11,240 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 208 transitions. Word has length 204 [2022-01-31 18:01:11,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:01:11,240 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 208 transitions. [2022-01-31 18:01:11,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.0306122448979593) internal successors, (199), 97 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 18:01:11,240 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 208 transitions. [2022-01-31 18:01:11,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2022-01-31 18:01:11,241 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:01:11,241 INFO L514 BasicCegarLoop]: trace histogram [95, 95, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:01:11,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2022-01-31 18:01:11,241 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:01:11,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:01:11,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1932538448, now seen corresponding path program 94 times [2022-01-31 18:01:11,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:01:11,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1888914970] [2022-01-31 18:01:11,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:01:11,243 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:01:11,243 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:01:11,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:01:11,248 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:01:11,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:14,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:01:14,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:14,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:01:14,682 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:01:14,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1888914970] [2022-01-31 18:01:14,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1888914970] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:01:14,683 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:01:14,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-01-31 18:01:14,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722715192] [2022-01-31 18:01:14,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:01:14,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-01-31 18:01:14,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:01:14,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-01-31 18:01:14,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4755, Invalid=4947, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 18:01:14,686 INFO L87 Difference]: Start difference. First operand 207 states and 208 transitions. Second operand has 99 states, 99 states have (on average 2.0303030303030303) internal successors, (201), 98 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:01:19,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:01:19,005 INFO L93 Difference]: Finished difference Result 220 states and 222 transitions. [2022-01-31 18:01:19,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-01-31 18:01:19,005 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.0303030303030303) internal successors, (201), 98 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have 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 18:01:19,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:01:19,006 INFO L225 Difference]: With dead ends: 220 [2022-01-31 18:01:19,006 INFO L226 Difference]: Without dead ends: 210 [2022-01-31 18:01:19,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4655 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=14259, Invalid=23571, Unknown=0, NotChecked=0, Total=37830 [2022-01-31 18:01:19,009 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 203 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:01:19,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 52 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:01:19,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-01-31 18:01:19,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 209. [2022-01-31 18:01:19,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 204 states have (on average 1.0098039215686274) internal successors, (206), 204 states have internal predecessors, (206), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:01:19,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 210 transitions. [2022-01-31 18:01:19,067 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 210 transitions. Word has length 206 [2022-01-31 18:01:19,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:01:19,067 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 210 transitions. [2022-01-31 18:01:19,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.0303030303030303) internal successors, (201), 98 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:01:19,067 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 210 transitions. [2022-01-31 18:01:19,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2022-01-31 18:01:19,068 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:01:19,068 INFO L514 BasicCegarLoop]: trace histogram [96, 96, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:01:19,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2022-01-31 18:01:19,068 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:01:19,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:01:19,068 INFO L85 PathProgramCache]: Analyzing trace with hash 317998066, now seen corresponding path program 95 times [2022-01-31 18:01:19,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:01:19,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [569913847] [2022-01-31 18:01:19,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:01:19,070 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:01:19,070 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:01:19,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:01:19,075 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:01:19,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:21,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:01:21,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:21,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:01:21,506 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:01:21,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [569913847] [2022-01-31 18:01:21,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [569913847] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:01:21,507 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:01:21,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-01-31 18:01:21,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366747050] [2022-01-31 18:01:21,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:01:21,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-01-31 18:01:21,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:01:21,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-01-31 18:01:21,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2022-01-31 18:01:21,510 INFO L87 Difference]: Start difference. First operand 209 states and 210 transitions. Second operand has 100 states, 100 states have (on average 2.03) internal successors, (203), 99 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:01:24,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:01:24,371 INFO L93 Difference]: Finished difference Result 222 states and 224 transitions. [2022-01-31 18:01:24,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-01-31 18:01:24,372 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.03) internal successors, (203), 99 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 208 [2022-01-31 18:01:24,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:01:24,373 INFO L225 Difference]: With dead ends: 222 [2022-01-31 18:01:24,373 INFO L226 Difference]: Without dead ends: 212 [2022-01-31 18:01:24,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4752 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=14553, Invalid=24059, Unknown=0, NotChecked=0, Total=38612 [2022-01-31 18:01:24,377 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 205 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:01:24,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 37 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:01:24,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-01-31 18:01:24,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 211. [2022-01-31 18:01:24,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 206 states have (on average 1.0097087378640777) internal successors, (208), 206 states have internal predecessors, (208), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:01:24,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 212 transitions. [2022-01-31 18:01:24,477 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 212 transitions. Word has length 208 [2022-01-31 18:01:24,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:01:24,477 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 212 transitions. [2022-01-31 18:01:24,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 2.03) internal successors, (203), 99 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:01:24,477 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 212 transitions. [2022-01-31 18:01:24,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2022-01-31 18:01:24,480 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:01:24,480 INFO L514 BasicCegarLoop]: trace histogram [97, 97, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:01:24,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2022-01-31 18:01:24,480 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:01:24,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:01:24,480 INFO L85 PathProgramCache]: Analyzing trace with hash -772115180, now seen corresponding path program 96 times [2022-01-31 18:01:24,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:01:24,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1641111785] [2022-01-31 18:01:24,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:01:24,482 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:01:24,482 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:01:24,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:01:24,489 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:01:24,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:28,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:01:28,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:28,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:01:28,187 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:01:28,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1641111785] [2022-01-31 18:01:28,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1641111785] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:01:28,188 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:01:28,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-01-31 18:01:28,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994067734] [2022-01-31 18:01:28,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:01:28,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-01-31 18:01:28,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:01:28,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-01-31 18:01:28,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4952, Invalid=5148, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 18:01:28,194 INFO L87 Difference]: Start difference. First operand 211 states and 212 transitions. Second operand has 101 states, 101 states have (on average 2.0297029702970297) internal successors, (205), 100 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 18:01:32,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:01:32,713 INFO L93 Difference]: Finished difference Result 224 states and 226 transitions. [2022-01-31 18:01:32,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-01-31 18:01:32,713 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.0297029702970297) internal successors, (205), 100 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 210 [2022-01-31 18:01:32,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:01:32,714 INFO L225 Difference]: With dead ends: 224 [2022-01-31 18:01:32,714 INFO L226 Difference]: Without dead ends: 214 [2022-01-31 18:01:32,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4850 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=14850, Invalid=24552, Unknown=0, NotChecked=0, Total=39402 [2022-01-31 18:01:32,717 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 207 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:01:32,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 37 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:01:32,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-01-31 18:01:32,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 213. [2022-01-31 18:01:32,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 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), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:01:32,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 214 transitions. [2022-01-31 18:01:32,800 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 214 transitions. Word has length 210 [2022-01-31 18:01:32,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:01:32,800 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 214 transitions. [2022-01-31 18:01:32,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.0297029702970297) internal successors, (205), 100 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 18:01:32,800 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 214 transitions. [2022-01-31 18:01:32,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2022-01-31 18:01:32,801 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:01:32,802 INFO L514 BasicCegarLoop]: trace histogram [98, 98, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:01:32,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2022-01-31 18:01:32,803 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:01:32,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:01:32,803 INFO L85 PathProgramCache]: Analyzing trace with hash -398924362, now seen corresponding path program 97 times [2022-01-31 18:01:32,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:01:32,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1264986417] [2022-01-31 18:01:32,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:01:32,818 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:01:32,818 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:01:32,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:01:32,825 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:01:32,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:36,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:01:36,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:36,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:01:36,573 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:01:36,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1264986417] [2022-01-31 18:01:36,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1264986417] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:01:36,573 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:01:36,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2022-01-31 18:01:36,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422591993] [2022-01-31 18:01:36,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:01:36,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-01-31 18:01:36,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:01:36,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-01-31 18:01:36,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2022-01-31 18:01:36,575 INFO L87 Difference]: Start difference. First operand 213 states and 214 transitions. Second operand has 102 states, 102 states have (on average 2.0294117647058822) internal successors, (207), 101 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:01:41,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:01:41,189 INFO L93 Difference]: Finished difference Result 226 states and 228 transitions. [2022-01-31 18:01:41,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-01-31 18:01:41,189 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.0294117647058822) internal successors, (207), 101 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have 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 18:01:41,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:01:41,190 INFO L225 Difference]: With dead ends: 226 [2022-01-31 18:01:41,190 INFO L226 Difference]: Without dead ends: 216 [2022-01-31 18:01:41,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4949 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=15150, Invalid=25050, Unknown=0, NotChecked=0, Total=40200 [2022-01-31 18:01:41,193 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 209 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:01:41,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 47 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:01:41,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-01-31 18:01:41,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 215. [2022-01-31 18:01:41,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 210 states have (on average 1.0095238095238095) internal successors, (212), 210 states have internal predecessors, (212), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:01:41,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 216 transitions. [2022-01-31 18:01:41,277 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 216 transitions. Word has length 212 [2022-01-31 18:01:41,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:01:41,278 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 216 transitions. [2022-01-31 18:01:41,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 2.0294117647058822) internal successors, (207), 101 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:01:41,278 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 216 transitions. [2022-01-31 18:01:41,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2022-01-31 18:01:41,279 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:01:41,279 INFO L514 BasicCegarLoop]: trace histogram [99, 99, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:01:41,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2022-01-31 18:01:41,279 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:01:41,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:01:41,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1755166168, now seen corresponding path program 98 times [2022-01-31 18:01:41,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:01:41,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1635539241] [2022-01-31 18:01:41,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:01:41,283 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:01:41,283 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:01:41,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:01:41,290 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:01:41,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:44,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:01:44,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:44,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:01:44,616 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:01:44,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1635539241] [2022-01-31 18:01:44,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1635539241] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:01:44,616 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:01:44,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2022-01-31 18:01:44,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368375787] [2022-01-31 18:01:44,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:01:44,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-01-31 18:01:44,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:01:44,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-01-31 18:01:44,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 18:01:44,619 INFO L87 Difference]: Start difference. First operand 215 states and 216 transitions. Second operand has 103 states, 103 states have (on average 2.029126213592233) internal successors, (209), 102 states have internal predecessors, (209), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:01:47,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:01:47,964 INFO L93 Difference]: Finished difference Result 228 states and 230 transitions. [2022-01-31 18:01:47,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-01-31 18:01:47,964 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 2.029126213592233) internal successors, (209), 102 states have internal predecessors, (209), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 214 [2022-01-31 18:01:47,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:01:47,968 INFO L225 Difference]: With dead ends: 228 [2022-01-31 18:01:47,968 INFO L226 Difference]: Without dead ends: 218 [2022-01-31 18:01:47,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5049 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=15453, Invalid=25553, Unknown=0, NotChecked=0, Total=41006 [2022-01-31 18:01:47,971 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 211 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:01:47,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 47 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:01:47,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-01-31 18:01:48,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 217. [2022-01-31 18:01:48,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 212 states have (on average 1.009433962264151) internal successors, (214), 212 states have internal predecessors, (214), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:01:48,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 218 transitions. [2022-01-31 18:01:48,030 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 218 transitions. Word has length 214 [2022-01-31 18:01:48,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:01:48,030 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 218 transitions. [2022-01-31 18:01:48,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 2.029126213592233) internal successors, (209), 102 states have internal predecessors, (209), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:01:48,031 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 218 transitions. [2022-01-31 18:01:48,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2022-01-31 18:01:48,031 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:01:48,031 INFO L514 BasicCegarLoop]: trace histogram [100, 100, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:01:48,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2022-01-31 18:01:48,031 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:01:48,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:01:48,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1661928826, now seen corresponding path program 99 times [2022-01-31 18:01:48,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:01:48,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1067692013] [2022-01-31 18:01:48,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:01:48,033 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:01:48,033 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:01:48,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:01:48,038 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:01:48,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:50,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:01:50,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:50,262 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 18:01:50,262 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:01:50,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1067692013] [2022-01-31 18:01:50,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1067692013] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:01:50,262 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:01:50,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2022-01-31 18:01:50,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795235451] [2022-01-31 18:01:50,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:01:50,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-01-31 18:01:50,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:01:50,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-01-31 18:01:50,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-01-31 18:01:50,265 INFO L87 Difference]: Start difference. First operand 217 states and 218 transitions. Second operand has 104 states, 104 states have (on average 2.0288461538461537) internal successors, (211), 103 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 18:01:53,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:01:53,526 INFO L93 Difference]: Finished difference Result 230 states and 232 transitions. [2022-01-31 18:01:53,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-01-31 18:01:53,527 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.0288461538461537) internal successors, (211), 103 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 216 [2022-01-31 18:01:53,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:01:53,531 INFO L225 Difference]: With dead ends: 230 [2022-01-31 18:01:53,531 INFO L226 Difference]: Without dead ends: 220 [2022-01-31 18:01:53,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5150 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=15759, Invalid=26061, Unknown=0, NotChecked=0, Total=41820 [2022-01-31 18:01:53,532 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 213 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:01:53,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 42 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:01:53,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-01-31 18:01:53,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 219. [2022-01-31 18:01:53,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 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), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:01:53,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 220 transitions. [2022-01-31 18:01:53,594 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 220 transitions. Word has length 216 [2022-01-31 18:01:53,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:01:53,594 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 220 transitions. [2022-01-31 18:01:53,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 2.0288461538461537) internal successors, (211), 103 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 18:01:53,594 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 220 transitions. [2022-01-31 18:01:53,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-01-31 18:01:53,597 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:01:53,597 INFO L514 BasicCegarLoop]: trace histogram [101, 101, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:01:53,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2022-01-31 18:01:53,597 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:01:53,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:01:53,597 INFO L85 PathProgramCache]: Analyzing trace with hash -2039810916, now seen corresponding path program 100 times [2022-01-31 18:01:53,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:01:53,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1466215689] [2022-01-31 18:01:53,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:01:53,598 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:01:53,598 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:01:53,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:01:53,604 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:01:53,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:55,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:01:55,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:55,872 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 18:01:55,872 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:01:55,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1466215689] [2022-01-31 18:01:55,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1466215689] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:01:55,872 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:01:55,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2022-01-31 18:01:55,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572109983] [2022-01-31 18:01:55,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:01:55,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-01-31 18:01:55,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:01:55,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-01-31 18:01:55,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5358, Invalid=5562, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 18:01:55,875 INFO L87 Difference]: Start difference. First operand 219 states and 220 transitions. Second operand has 105 states, 105 states have (on average 2.0285714285714285) internal successors, (213), 104 states have internal predecessors, (213), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:01:59,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:01:59,314 INFO L93 Difference]: Finished difference Result 232 states and 234 transitions. [2022-01-31 18:01:59,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-01-31 18:01:59,314 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.0285714285714285) internal successors, (213), 104 states have internal predecessors, (213), 2 states have call successors, (3), 3 states have 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 18:01:59,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:01:59,315 INFO L225 Difference]: With dead ends: 232 [2022-01-31 18:01:59,315 INFO L226 Difference]: Without dead ends: 222 [2022-01-31 18:01:59,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5252 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=16068, Invalid=26574, Unknown=0, NotChecked=0, Total=42642 [2022-01-31 18:01:59,318 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 215 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:01:59,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 32 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:01:59,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-01-31 18:01:59,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 221. [2022-01-31 18:01:59,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 216 states have (on average 1.0092592592592593) internal successors, (218), 216 states have internal predecessors, (218), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:01:59,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 222 transitions. [2022-01-31 18:01:59,381 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 222 transitions. Word has length 218 [2022-01-31 18:01:59,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:01:59,381 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 222 transitions. [2022-01-31 18:01:59,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 2.0285714285714285) internal successors, (213), 104 states have internal predecessors, (213), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:01:59,382 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 222 transitions. [2022-01-31 18:01:59,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2022-01-31 18:01:59,382 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:01:59,382 INFO L514 BasicCegarLoop]: trace histogram [102, 102, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:01:59,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2022-01-31 18:01:59,382 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:01:59,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:01:59,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1116185406, now seen corresponding path program 101 times [2022-01-31 18:01:59,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:01:59,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1481866790] [2022-01-31 18:01:59,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:01:59,388 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:01:59,389 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:01:59,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:01:59,395 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:01:59,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:02:02,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:02:02,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:02:02,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:02:02,842 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:02:02,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1481866790] [2022-01-31 18:02:02,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1481866790] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:02:02,843 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:02:02,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2022-01-31 18:02:02,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824709163] [2022-01-31 18:02:02,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:02:02,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-01-31 18:02:02,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:02:02,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-01-31 18:02:02,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2022-01-31 18:02:02,846 INFO L87 Difference]: Start difference. First operand 221 states and 222 transitions. Second operand has 106 states, 106 states have (on average 2.0283018867924527) internal successors, (215), 105 states have internal predecessors, (215), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:02:07,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:02:07,047 INFO L93 Difference]: Finished difference Result 234 states and 236 transitions. [2022-01-31 18:02:07,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-01-31 18:02:07,047 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.0283018867924527) internal successors, (215), 105 states have internal predecessors, (215), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 220 [2022-01-31 18:02:07,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:02:07,048 INFO L225 Difference]: With dead ends: 234 [2022-01-31 18:02:07,048 INFO L226 Difference]: Without dead ends: 224 [2022-01-31 18:02:07,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5355 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=16380, Invalid=27092, Unknown=0, NotChecked=0, Total=43472 [2022-01-31 18:02:07,052 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 217 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:02:07,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 47 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:02:07,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-01-31 18:02:07,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 223. [2022-01-31 18:02:07,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 218 states have (on average 1.0091743119266054) internal successors, (220), 218 states have internal predecessors, (220), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:02:07,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 224 transitions. [2022-01-31 18:02:07,133 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 224 transitions. Word has length 220 [2022-01-31 18:02:07,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:02:07,133 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 224 transitions. [2022-01-31 18:02:07,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 2.0283018867924527) internal successors, (215), 105 states have internal predecessors, (215), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:02:07,133 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 224 transitions. [2022-01-31 18:02:07,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-01-31 18:02:07,134 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:02:07,134 INFO L514 BasicCegarLoop]: trace histogram [103, 103, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:02:07,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2022-01-31 18:02:07,134 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:02:07,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:02:07,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1781739872, now seen corresponding path program 102 times [2022-01-31 18:02:07,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:02:07,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [224922689] [2022-01-31 18:02:07,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:02:07,136 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:02:07,136 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:02:07,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:02:07,142 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:02:07,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:02:10,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:02:10,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:02:10,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:02:10,446 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:02:10,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [224922689] [2022-01-31 18:02:10,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [224922689] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:02:10,448 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:02:10,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [107] imperfect sequences [] total 107 [2022-01-31 18:02:10,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384699723] [2022-01-31 18:02:10,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:02:10,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-01-31 18:02:10,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:02:10,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-01-31 18:02:10,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5567, Invalid=5775, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 18:02:10,450 INFO L87 Difference]: Start difference. First operand 223 states and 224 transitions. Second operand has 107 states, 107 states have (on average 2.02803738317757) internal successors, (217), 106 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 18:02:13,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:02:13,785 INFO L93 Difference]: Finished difference Result 236 states and 238 transitions. [2022-01-31 18:02:13,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-01-31 18:02:13,786 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.02803738317757) internal successors, (217), 106 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 222 [2022-01-31 18:02:13,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:02:13,787 INFO L225 Difference]: With dead ends: 236 [2022-01-31 18:02:13,787 INFO L226 Difference]: Without dead ends: 226 [2022-01-31 18:02:13,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5459 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=16695, Invalid=27615, Unknown=0, NotChecked=0, Total=44310 [2022-01-31 18:02:13,790 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 219 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:02:13,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 37 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:02:13,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-01-31 18:02:13,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 225. [2022-01-31 18:02:13,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 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), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:02:13,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 226 transitions. [2022-01-31 18:02:13,879 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 226 transitions. Word has length 222 [2022-01-31 18:02:13,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:02:13,879 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 226 transitions. [2022-01-31 18:02:13,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 2.02803738317757) internal successors, (217), 106 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 18:02:13,879 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 226 transitions. [2022-01-31 18:02:13,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2022-01-31 18:02:13,880 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:02:13,880 INFO L514 BasicCegarLoop]: trace histogram [104, 104, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:02:13,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2022-01-31 18:02:13,880 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:02:13,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:02:13,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1429454594, now seen corresponding path program 103 times [2022-01-31 18:02:13,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:02:13,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1843280559] [2022-01-31 18:02:13,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:02:13,882 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:02:13,882 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:02:13,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:02:13,889 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:02:13,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:02:16,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:02:16,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:02:16,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:02:16,125 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:02:16,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1843280559] [2022-01-31 18:02:16,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1843280559] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:02:16,125 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:02:16,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2022-01-31 18:02:16,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530892849] [2022-01-31 18:02:16,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:02:16,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-01-31 18:02:16,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:02:16,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-01-31 18:02:16,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5673, Invalid=5883, Unknown=0, NotChecked=0, Total=11556 [2022-01-31 18:02:16,128 INFO L87 Difference]: Start difference. First operand 225 states and 226 transitions. Second operand has 108 states, 108 states have (on average 2.0277777777777777) internal successors, (219), 107 states have internal predecessors, (219), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:02:19,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:02:19,002 INFO L93 Difference]: Finished difference Result 238 states and 240 transitions. [2022-01-31 18:02:19,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-01-31 18:02:19,003 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 2.0277777777777777) internal successors, (219), 107 states have internal predecessors, (219), 2 states have call successors, (3), 3 states have 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 18:02:19,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:02:19,003 INFO L225 Difference]: With dead ends: 238 [2022-01-31 18:02:19,003 INFO L226 Difference]: Without dead ends: 228 [2022-01-31 18:02:19,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5564 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=17013, Invalid=28143, Unknown=0, NotChecked=0, Total=45156 [2022-01-31 18:02:19,005 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 221 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:02:19,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 57 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:02:19,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-01-31 18:02:19,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 227. [2022-01-31 18:02:19,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 222 states have (on average 1.009009009009009) internal successors, (224), 222 states have internal predecessors, (224), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:02:19,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 228 transitions. [2022-01-31 18:02:19,069 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 228 transitions. Word has length 224 [2022-01-31 18:02:19,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:02:19,069 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 228 transitions. [2022-01-31 18:02:19,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 2.0277777777777777) internal successors, (219), 107 states have internal predecessors, (219), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:02:19,070 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 228 transitions. [2022-01-31 18:02:19,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2022-01-31 18:02:19,070 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:02:19,070 INFO L514 BasicCegarLoop]: trace histogram [105, 105, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:02:19,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2022-01-31 18:02:19,070 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:02:19,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:02:19,071 INFO L85 PathProgramCache]: Analyzing trace with hash -2109248476, now seen corresponding path program 104 times [2022-01-31 18:02:19,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:02:19,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [397725143] [2022-01-31 18:02:19,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:02:19,072 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:02:19,072 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:02:19,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:02:19,077 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:02:19,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:02:21,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:02:21,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:02:21,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:02:21,976 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:02:21,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [397725143] [2022-01-31 18:02:21,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [397725143] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:02:21,977 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:02:21,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [109] imperfect sequences [] total 109 [2022-01-31 18:02:21,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908322294] [2022-01-31 18:02:21,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:02:21,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-01-31 18:02:21,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:02:21,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-01-31 18:02:21,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5780, Invalid=5992, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 18:02:21,979 INFO L87 Difference]: Start difference. First operand 227 states and 228 transitions. Second operand has 109 states, 109 states have (on average 2.0275229357798166) internal successors, (221), 108 states have internal predecessors, (221), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:02:25,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:02:25,374 INFO L93 Difference]: Finished difference Result 240 states and 242 transitions. [2022-01-31 18:02:25,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-01-31 18:02:25,375 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 2.0275229357798166) internal successors, (221), 108 states have internal predecessors, (221), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 226 [2022-01-31 18:02:25,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:02:25,375 INFO L225 Difference]: With dead ends: 240 [2022-01-31 18:02:25,376 INFO L226 Difference]: Without dead ends: 230 [2022-01-31 18:02:25,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5670 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=17334, Invalid=28676, Unknown=0, NotChecked=0, Total=46010 [2022-01-31 18:02:25,380 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 223 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:02:25,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 52 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:02:25,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-01-31 18:02:25,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 229. [2022-01-31 18:02:25,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 224 states have (on average 1.0089285714285714) internal successors, (226), 224 states have internal predecessors, (226), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:02:25,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 230 transitions. [2022-01-31 18:02:25,475 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 230 transitions. Word has length 226 [2022-01-31 18:02:25,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:02:25,475 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 230 transitions. [2022-01-31 18:02:25,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 2.0275229357798166) internal successors, (221), 108 states have internal predecessors, (221), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:02:25,475 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 230 transitions. [2022-01-31 18:02:25,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2022-01-31 18:02:25,476 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:02:25,476 INFO L514 BasicCegarLoop]: trace histogram [106, 106, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:02:25,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2022-01-31 18:02:25,476 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:02:25,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:02:25,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1188800314, now seen corresponding path program 105 times [2022-01-31 18:02:25,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:02:25,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1292000706] [2022-01-31 18:02:25,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:02:25,478 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:02:25,478 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:02:25,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:02:25,493 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:02:25,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:02:27,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:02:27,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:02:27,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:02:27,953 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:02:27,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1292000706] [2022-01-31 18:02:27,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1292000706] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:02:27,953 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:02:27,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [110] imperfect sequences [] total 110 [2022-01-31 18:02:27,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57684691] [2022-01-31 18:02:27,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:02:27,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-01-31 18:02:27,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:02:27,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-01-31 18:02:27,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5888, Invalid=6102, Unknown=0, NotChecked=0, Total=11990 [2022-01-31 18:02:27,963 INFO L87 Difference]: Start difference. First operand 229 states and 230 transitions. Second operand has 110 states, 110 states have (on average 2.0272727272727273) internal successors, (223), 109 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 18:02:31,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:02:31,182 INFO L93 Difference]: Finished difference Result 242 states and 244 transitions. [2022-01-31 18:02:31,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-01-31 18:02:31,182 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.0272727272727273) internal successors, (223), 109 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 228 [2022-01-31 18:02:31,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:02:31,183 INFO L225 Difference]: With dead ends: 242 [2022-01-31 18:02:31,183 INFO L226 Difference]: Without dead ends: 232 [2022-01-31 18:02:31,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5777 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=17658, Invalid=29214, Unknown=0, NotChecked=0, Total=46872 [2022-01-31 18:02:31,186 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 225 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:02:31,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 62 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:02:31,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-01-31 18:02:31,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 231. [2022-01-31 18:02:31,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 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), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:02:31,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 232 transitions. [2022-01-31 18:02:31,389 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 232 transitions. Word has length 228 [2022-01-31 18:02:31,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:02:31,389 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 232 transitions. [2022-01-31 18:02:31,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 2.0272727272727273) internal successors, (223), 109 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 18:02:31,390 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 232 transitions. [2022-01-31 18:02:31,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-01-31 18:02:31,390 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:02:31,390 INFO L514 BasicCegarLoop]: trace histogram [107, 107, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:02:31,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2022-01-31 18:02:31,391 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:02:31,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:02:31,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1401379608, now seen corresponding path program 106 times [2022-01-31 18:02:31,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:02:31,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [571775086] [2022-01-31 18:02:31,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:02:31,407 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:02:31,407 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:02:31,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:02:31,415 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:02:31,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:02:33,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:02:33,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:02:33,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:02:33,983 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:02:33,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [571775086] [2022-01-31 18:02:33,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [571775086] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:02:33,984 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:02:33,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [111] imperfect sequences [] total 111 [2022-01-31 18:02:33,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413814128] [2022-01-31 18:02:33,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:02:33,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-01-31 18:02:33,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:02:33,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-01-31 18:02:33,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5997, Invalid=6213, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 18:02:33,988 INFO L87 Difference]: Start difference. First operand 231 states and 232 transitions. Second operand has 111 states, 111 states have (on average 2.027027027027027) internal successors, (225), 110 states have internal predecessors, (225), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:02:37,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:02:37,202 INFO L93 Difference]: Finished difference Result 244 states and 246 transitions. [2022-01-31 18:02:37,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-01-31 18:02:37,202 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 2.027027027027027) internal successors, (225), 110 states have internal predecessors, (225), 2 states have call successors, (3), 3 states have 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 18:02:37,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:02:37,203 INFO L225 Difference]: With dead ends: 244 [2022-01-31 18:02:37,203 INFO L226 Difference]: Without dead ends: 234 [2022-01-31 18:02:37,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5885 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=17985, Invalid=29757, Unknown=0, NotChecked=0, Total=47742 [2022-01-31 18:02:37,205 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 227 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:02:37,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 32 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:02:37,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-01-31 18:02:37,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 233. [2022-01-31 18:02:37,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 228 states have (on average 1.0087719298245614) internal successors, (230), 228 states have internal predecessors, (230), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:02:37,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 234 transitions. [2022-01-31 18:02:37,296 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 234 transitions. Word has length 230 [2022-01-31 18:02:37,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:02:37,297 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 234 transitions. [2022-01-31 18:02:37,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 2.027027027027027) internal successors, (225), 110 states have internal predecessors, (225), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:02:37,297 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 234 transitions. [2022-01-31 18:02:37,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2022-01-31 18:02:37,297 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:02:37,298 INFO L514 BasicCegarLoop]: trace histogram [108, 108, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:02:37,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2022-01-31 18:02:37,298 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:02:37,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:02:37,298 INFO L85 PathProgramCache]: Analyzing trace with hash 468349066, now seen corresponding path program 107 times [2022-01-31 18:02:37,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:02:37,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [288230417] [2022-01-31 18:02:37,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:02:37,299 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:02:37,300 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:02:37,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:02:37,307 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:02:37,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:02:40,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:02:40,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:02:40,116 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 18:02:40,116 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:02:40,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [288230417] [2022-01-31 18:02:40,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [288230417] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:02:40,116 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:02:40,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [112] imperfect sequences [] total 112 [2022-01-31 18:02:40,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268315122] [2022-01-31 18:02:40,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:02:40,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-01-31 18:02:40,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:02:40,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-01-31 18:02:40,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6107, Invalid=6325, Unknown=0, NotChecked=0, Total=12432 [2022-01-31 18:02:40,119 INFO L87 Difference]: Start difference. First operand 233 states and 234 transitions. Second operand has 112 states, 112 states have (on average 2.0267857142857144) internal successors, (227), 111 states have internal predecessors, (227), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:02:43,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:02:43,315 INFO L93 Difference]: Finished difference Result 246 states and 248 transitions. [2022-01-31 18:02:43,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-01-31 18:02:43,315 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 2.0267857142857144) internal successors, (227), 111 states have internal predecessors, (227), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 232 [2022-01-31 18:02:43,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:02:43,316 INFO L225 Difference]: With dead ends: 246 [2022-01-31 18:02:43,316 INFO L226 Difference]: Without dead ends: 236 [2022-01-31 18:02:43,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5994 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=18315, Invalid=30305, Unknown=0, NotChecked=0, Total=48620 [2022-01-31 18:02:43,319 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 229 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:02:43,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 52 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:02:43,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-01-31 18:02:43,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 235. [2022-01-31 18:02:43,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 230 states have (on average 1.008695652173913) internal successors, (232), 230 states have internal predecessors, (232), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:02:43,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 236 transitions. [2022-01-31 18:02:43,398 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 236 transitions. Word has length 232 [2022-01-31 18:02:43,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:02:43,399 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 236 transitions. [2022-01-31 18:02:43,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 2.0267857142857144) internal successors, (227), 111 states have internal predecessors, (227), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:02:43,399 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 236 transitions. [2022-01-31 18:02:43,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2022-01-31 18:02:43,399 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:02:43,400 INFO L514 BasicCegarLoop]: trace histogram [109, 109, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:02:43,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2022-01-31 18:02:43,400 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:02:43,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:02:43,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1981275052, now seen corresponding path program 108 times [2022-01-31 18:02:43,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:02:43,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1431727341] [2022-01-31 18:02:43,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:02:43,401 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:02:43,401 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:02:43,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:02:43,408 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:02:43,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:02:46,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:02:46,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:02:46,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:02:46,229 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:02:46,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1431727341] [2022-01-31 18:02:46,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1431727341] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:02:46,229 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:02:46,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [113] imperfect sequences [] total 113 [2022-01-31 18:02:46,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137492571] [2022-01-31 18:02:46,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:02:46,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-01-31 18:02:46,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:02:46,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-01-31 18:02:46,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6218, Invalid=6438, Unknown=0, NotChecked=0, Total=12656 [2022-01-31 18:02:46,231 INFO L87 Difference]: Start difference. First operand 235 states and 236 transitions. Second operand has 113 states, 113 states have (on average 2.0265486725663715) internal successors, (229), 112 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 18:02:51,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:02:51,384 INFO L93 Difference]: Finished difference Result 248 states and 250 transitions. [2022-01-31 18:02:51,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-01-31 18:02:51,389 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 2.0265486725663715) internal successors, (229), 112 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 234 [2022-01-31 18:02:51,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:02:51,390 INFO L225 Difference]: With dead ends: 248 [2022-01-31 18:02:51,390 INFO L226 Difference]: Without dead ends: 238 [2022-01-31 18:02:51,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6104 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=18648, Invalid=30858, Unknown=0, NotChecked=0, Total=49506 [2022-01-31 18:02:51,394 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 231 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:02:51,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 52 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:02:51,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-01-31 18:02:51,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 237. [2022-01-31 18:02:51,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 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), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:02:51,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 238 transitions. [2022-01-31 18:02:51,538 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 238 transitions. Word has length 234 [2022-01-31 18:02:51,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:02:51,538 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 238 transitions. [2022-01-31 18:02:51,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 2.0265486725663715) internal successors, (229), 112 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 18:02:51,539 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 238 transitions. [2022-01-31 18:02:51,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2022-01-31 18:02:51,539 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:02:51,539 INFO L514 BasicCegarLoop]: trace histogram [110, 110, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:02:51,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2022-01-31 18:02:51,540 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:02:51,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:02:51,540 INFO L85 PathProgramCache]: Analyzing trace with hash -90765746, now seen corresponding path program 109 times [2022-01-31 18:02:51,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:02:51,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1946705141] [2022-01-31 18:02:51,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:02:51,541 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:02:51,541 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:02:51,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:02:51,549 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:02:51,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:02:55,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:02:55,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:02:55,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:02:55,517 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:02:55,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1946705141] [2022-01-31 18:02:55,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1946705141] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:02:55,518 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:02:55,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [114] imperfect sequences [] total 114 [2022-01-31 18:02:55,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443682586] [2022-01-31 18:02:55,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:02:55,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2022-01-31 18:02:55,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:02:55,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2022-01-31 18:02:55,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6330, Invalid=6552, Unknown=0, NotChecked=0, Total=12882 [2022-01-31 18:02:55,522 INFO L87 Difference]: Start difference. First operand 237 states and 238 transitions. Second operand has 114 states, 114 states have (on average 2.026315789473684) internal successors, (231), 113 states have internal predecessors, (231), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:02:58,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:02:58,917 INFO L93 Difference]: Finished difference Result 250 states and 252 transitions. [2022-01-31 18:02:58,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-01-31 18:02:58,918 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 2.026315789473684) internal successors, (231), 113 states have internal predecessors, (231), 2 states have call successors, (3), 3 states have 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 18:02:58,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:02:58,918 INFO L225 Difference]: With dead ends: 250 [2022-01-31 18:02:58,918 INFO L226 Difference]: Without dead ends: 240 [2022-01-31 18:02:58,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6215 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=18984, Invalid=31416, Unknown=0, NotChecked=0, Total=50400 [2022-01-31 18:02:58,922 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 233 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:02:58,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 32 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:02:58,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-01-31 18:02:59,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 239. [2022-01-31 18:02:59,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 234 states have (on average 1.0085470085470085) internal successors, (236), 234 states have internal predecessors, (236), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:02:59,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 240 transitions. [2022-01-31 18:02:59,023 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 240 transitions. Word has length 236 [2022-01-31 18:02:59,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:02:59,023 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 240 transitions. [2022-01-31 18:02:59,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 2.026315789473684) internal successors, (231), 113 states have internal predecessors, (231), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:02:59,023 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 240 transitions. [2022-01-31 18:02:59,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2022-01-31 18:02:59,024 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:02:59,024 INFO L514 BasicCegarLoop]: trace histogram [111, 111, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:02:59,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2022-01-31 18:02:59,024 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:02:59,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:02:59,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1542852720, now seen corresponding path program 110 times [2022-01-31 18:02:59,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:02:59,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1367350367] [2022-01-31 18:02:59,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:02:59,030 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:02:59,030 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:02:59,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:02:59,039 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:02:59,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:03:01,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:03:01,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:03:01,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:03:01,922 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:03:01,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1367350367] [2022-01-31 18:03:01,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1367350367] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:03:01,922 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:03:01,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [115] imperfect sequences [] total 115 [2022-01-31 18:03:01,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936181173] [2022-01-31 18:03:01,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:03:01,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-01-31 18:03:01,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:03:01,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-01-31 18:03:01,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6443, Invalid=6667, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 18:03:01,926 INFO L87 Difference]: Start difference. First operand 239 states and 240 transitions. Second operand has 115 states, 115 states have (on average 2.026086956521739) internal successors, (233), 114 states have internal predecessors, (233), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:03:05,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:03:05,626 INFO L93 Difference]: Finished difference Result 252 states and 254 transitions. [2022-01-31 18:03:05,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-01-31 18:03:05,626 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 2.026086956521739) internal successors, (233), 114 states have internal predecessors, (233), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 238 [2022-01-31 18:03:05,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:03:05,627 INFO L225 Difference]: With dead ends: 252 [2022-01-31 18:03:05,627 INFO L226 Difference]: Without dead ends: 242 [2022-01-31 18:03:05,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6327 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=19323, Invalid=31979, Unknown=0, NotChecked=0, Total=51302 [2022-01-31 18:03:05,629 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 235 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:03:05,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 37 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:03:05,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-01-31 18:03:05,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 241. [2022-01-31 18:03:05,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 236 states have (on average 1.0084745762711864) internal successors, (238), 236 states have internal predecessors, (238), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:03:05,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 242 transitions. [2022-01-31 18:03:05,700 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 242 transitions. Word has length 238 [2022-01-31 18:03:05,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:03:05,700 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 242 transitions. [2022-01-31 18:03:05,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 2.026086956521739) internal successors, (233), 114 states have internal predecessors, (233), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:03:05,701 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 242 transitions. [2022-01-31 18:03:05,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2022-01-31 18:03:05,701 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:03:05,701 INFO L514 BasicCegarLoop]: trace histogram [112, 112, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:03:05,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2022-01-31 18:03:05,701 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:03:05,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:03:05,702 INFO L85 PathProgramCache]: Analyzing trace with hash -507831790, now seen corresponding path program 111 times [2022-01-31 18:03:05,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:03:05,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [190802620] [2022-01-31 18:03:05,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:03:05,703 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:03:05,703 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:03:05,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:03:05,709 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:03:05,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:03:09,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:03:09,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:03:09,789 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 18:03:09,789 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:03:09,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [190802620] [2022-01-31 18:03:09,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [190802620] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:03:09,789 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:03:09,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [116] imperfect sequences [] total 116 [2022-01-31 18:03:09,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593653137] [2022-01-31 18:03:09,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:03:09,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-01-31 18:03:09,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:03:09,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-01-31 18:03:09,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6557, Invalid=6783, Unknown=0, NotChecked=0, Total=13340 [2022-01-31 18:03:09,792 INFO L87 Difference]: Start difference. First operand 241 states and 242 transitions. Second operand has 116 states, 116 states have (on average 2.0258620689655173) internal successors, (235), 115 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 18:03:13,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:03:13,368 INFO L93 Difference]: Finished difference Result 254 states and 256 transitions. [2022-01-31 18:03:13,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-01-31 18:03:13,368 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 2.0258620689655173) internal successors, (235), 115 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 240 [2022-01-31 18:03:13,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:03:13,369 INFO L225 Difference]: With dead ends: 254 [2022-01-31 18:03:13,369 INFO L226 Difference]: Without dead ends: 244 [2022-01-31 18:03:13,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6440 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=19665, Invalid=32547, Unknown=0, NotChecked=0, Total=52212 [2022-01-31 18:03:13,372 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 237 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:03:13,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 42 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:03:13,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-01-31 18:03:13,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 243. [2022-01-31 18:03:13,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 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), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:03:13,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 244 transitions. [2022-01-31 18:03:13,474 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 244 transitions. Word has length 240 [2022-01-31 18:03:13,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:03:13,474 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 244 transitions. [2022-01-31 18:03:13,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 2.0258620689655173) internal successors, (235), 115 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 18:03:13,475 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 244 transitions. [2022-01-31 18:03:13,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2022-01-31 18:03:13,475 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:03:13,475 INFO L514 BasicCegarLoop]: trace histogram [113, 113, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:03:13,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2022-01-31 18:03:13,476 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:03:13,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:03:13,476 INFO L85 PathProgramCache]: Analyzing trace with hash 174342964, now seen corresponding path program 112 times [2022-01-31 18:03:13,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:03:13,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1127678694] [2022-01-31 18:03:13,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:03:13,477 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:03:13,477 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:03:13,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:03:13,485 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:03:13,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:03:16,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:03:16,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:03:16,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:03:16,098 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:03:16,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1127678694] [2022-01-31 18:03:16,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1127678694] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:03:16,098 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:03:16,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [117] imperfect sequences [] total 117 [2022-01-31 18:03:16,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802115448] [2022-01-31 18:03:16,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:03:16,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-01-31 18:03:16,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:03:16,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-01-31 18:03:16,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6672, Invalid=6900, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 18:03:16,102 INFO L87 Difference]: Start difference. First operand 243 states and 244 transitions. Second operand has 117 states, 117 states have (on average 2.0256410256410255) internal successors, (237), 116 states have internal predecessors, (237), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:03:19,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:03:19,628 INFO L93 Difference]: Finished difference Result 256 states and 258 transitions. [2022-01-31 18:03:19,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-01-31 18:03:19,628 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 2.0256410256410255) internal successors, (237), 116 states have internal predecessors, (237), 2 states have call successors, (3), 3 states have 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 18:03:19,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:03:19,629 INFO L225 Difference]: With dead ends: 256 [2022-01-31 18:03:19,629 INFO L226 Difference]: Without dead ends: 246 [2022-01-31 18:03:19,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6554 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=20010, Invalid=33120, Unknown=0, NotChecked=0, Total=53130 [2022-01-31 18:03:19,632 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 239 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:03:19,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 27 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:03:19,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-01-31 18:03:19,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 245. [2022-01-31 18:03:19,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 240 states have (on average 1.0083333333333333) internal successors, (242), 240 states have internal predecessors, (242), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:03:19,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 246 transitions. [2022-01-31 18:03:19,706 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 246 transitions. Word has length 242 [2022-01-31 18:03:19,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:03:19,706 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 246 transitions. [2022-01-31 18:03:19,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 2.0256410256410255) internal successors, (237), 116 states have internal predecessors, (237), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:03:19,707 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 246 transitions. [2022-01-31 18:03:19,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2022-01-31 18:03:19,707 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:03:19,707 INFO L514 BasicCegarLoop]: trace histogram [114, 114, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:03:19,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2022-01-31 18:03:19,707 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:03:19,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:03:19,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1385714730, now seen corresponding path program 113 times [2022-01-31 18:03:19,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:03:19,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1878946574] [2022-01-31 18:03:19,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:03:19,709 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:03:19,709 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:03:19,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:03:19,716 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:03:19,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:03:22,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:03:22,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:03:22,282 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 18:03:22,282 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:03:22,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1878946574] [2022-01-31 18:03:22,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1878946574] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:03:22,282 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:03:22,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [118] imperfect sequences [] total 118 [2022-01-31 18:03:22,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106837326] [2022-01-31 18:03:22,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:03:22,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2022-01-31 18:03:22,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:03:22,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2022-01-31 18:03:22,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6788, Invalid=7018, Unknown=0, NotChecked=0, Total=13806 [2022-01-31 18:03:22,286 INFO L87 Difference]: Start difference. First operand 245 states and 246 transitions. Second operand has 118 states, 118 states have (on average 2.0254237288135593) internal successors, (239), 117 states have internal predecessors, (239), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:03:25,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:03:25,780 INFO L93 Difference]: Finished difference Result 258 states and 260 transitions. [2022-01-31 18:03:25,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-01-31 18:03:25,781 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 2.0254237288135593) internal successors, (239), 117 states have internal predecessors, (239), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 244 [2022-01-31 18:03:25,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:03:25,782 INFO L225 Difference]: With dead ends: 258 [2022-01-31 18:03:25,782 INFO L226 Difference]: Without dead ends: 248 [2022-01-31 18:03:25,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6669 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=20358, Invalid=33698, Unknown=0, NotChecked=0, Total=54056 [2022-01-31 18:03:25,786 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 241 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:03:25,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 52 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:03:25,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-01-31 18:03:25,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 247. [2022-01-31 18:03:25,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 242 states have (on average 1.0082644628099173) internal successors, (244), 242 states have internal predecessors, (244), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:03:25,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 248 transitions. [2022-01-31 18:03:25,892 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 248 transitions. Word has length 244 [2022-01-31 18:03:25,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:03:25,892 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 248 transitions. [2022-01-31 18:03:25,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 2.0254237288135593) internal successors, (239), 117 states have internal predecessors, (239), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:03:25,892 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 248 transitions. [2022-01-31 18:03:25,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2022-01-31 18:03:25,893 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:03:25,893 INFO L514 BasicCegarLoop]: trace histogram [115, 115, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:03:25,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2022-01-31 18:03:25,893 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:03:25,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:03:25,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1657572360, now seen corresponding path program 114 times [2022-01-31 18:03:25,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:03:25,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1945214055] [2022-01-31 18:03:25,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:03:25,894 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:03:25,894 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:03:25,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:03:25,901 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:03:25,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:03:28,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:03:28,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:03:28,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:03:28,464 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:03:28,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1945214055] [2022-01-31 18:03:28,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1945214055] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:03:28,464 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:03:28,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [119] imperfect sequences [] total 119 [2022-01-31 18:03:28,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367544417] [2022-01-31 18:03:28,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:03:28,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-01-31 18:03:28,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:03:28,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-01-31 18:03:28,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6905, Invalid=7137, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 18:03:28,468 INFO L87 Difference]: Start difference. First operand 247 states and 248 transitions. Second operand has 119 states, 119 states have (on average 2.0252100840336134) internal successors, (241), 118 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 18:03:31,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:03:31,730 INFO L93 Difference]: Finished difference Result 260 states and 262 transitions. [2022-01-31 18:03:31,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-01-31 18:03:31,730 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 2.0252100840336134) internal successors, (241), 118 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 246 [2022-01-31 18:03:31,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:03:31,731 INFO L225 Difference]: With dead ends: 260 [2022-01-31 18:03:31,731 INFO L226 Difference]: Without dead ends: 250 [2022-01-31 18:03:31,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6785 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=20709, Invalid=34281, Unknown=0, NotChecked=0, Total=54990 [2022-01-31 18:03:31,734 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 243 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:03:31,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 42 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:03:31,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-01-31 18:03:31,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 249. [2022-01-31 18:03:31,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 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), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:03:31,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 250 transitions. [2022-01-31 18:03:31,824 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 250 transitions. Word has length 246 [2022-01-31 18:03:31,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:03:31,825 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 250 transitions. [2022-01-31 18:03:31,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 2.0252100840336134) internal successors, (241), 118 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 18:03:31,825 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 250 transitions. [2022-01-31 18:03:31,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2022-01-31 18:03:31,825 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:03:31,825 INFO L514 BasicCegarLoop]: trace histogram [116, 116, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:03:31,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2022-01-31 18:03:31,826 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:03:31,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:03:31,826 INFO L85 PathProgramCache]: Analyzing trace with hash -919749734, now seen corresponding path program 115 times [2022-01-31 18:03:31,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:03:31,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1311216390] [2022-01-31 18:03:31,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:03:31,827 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:03:31,827 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:03:31,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:03:31,834 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:03:31,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:03:34,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:03:34,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:03:34,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:03:34,503 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:03:34,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1311216390] [2022-01-31 18:03:34,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1311216390] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:03:34,503 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:03:34,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [120] imperfect sequences [] total 120 [2022-01-31 18:03:34,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493424701] [2022-01-31 18:03:34,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:03:34,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2022-01-31 18:03:34,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:03:34,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2022-01-31 18:03:34,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7023, Invalid=7257, Unknown=0, NotChecked=0, Total=14280 [2022-01-31 18:03:34,506 INFO L87 Difference]: Start difference. First operand 249 states and 250 transitions. Second operand has 120 states, 120 states have (on average 2.025) internal successors, (243), 119 states have internal predecessors, (243), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:03:37,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:03:37,796 INFO L93 Difference]: Finished difference Result 262 states and 264 transitions. [2022-01-31 18:03:37,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-01-31 18:03:37,796 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 2.025) internal successors, (243), 119 states have internal predecessors, (243), 2 states have call successors, (3), 3 states have 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 18:03:37,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:03:37,797 INFO L225 Difference]: With dead ends: 262 [2022-01-31 18:03:37,797 INFO L226 Difference]: Without dead ends: 252 [2022-01-31 18:03:37,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6902 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=21063, Invalid=34869, Unknown=0, NotChecked=0, Total=55932 [2022-01-31 18:03:37,800 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 245 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:03:37,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 47 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:03:37,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-01-31 18:03:37,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 251. [2022-01-31 18:03:37,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 246 states have (on average 1.008130081300813) internal successors, (248), 246 states have internal predecessors, (248), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:03:37,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 252 transitions. [2022-01-31 18:03:37,896 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 252 transitions. Word has length 248 [2022-01-31 18:03:37,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:03:37,896 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 252 transitions. [2022-01-31 18:03:37,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 120 states have (on average 2.025) internal successors, (243), 119 states have internal predecessors, (243), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:03:37,897 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 252 transitions. [2022-01-31 18:03:37,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2022-01-31 18:03:37,897 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:03:37,897 INFO L514 BasicCegarLoop]: trace histogram [117, 117, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:03:37,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2022-01-31 18:03:37,897 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:03:37,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:03:37,898 INFO L85 PathProgramCache]: Analyzing trace with hash -541809988, now seen corresponding path program 116 times [2022-01-31 18:03:37,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:03:37,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1437328953] [2022-01-31 18:03:37,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:03:37,899 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:03:37,899 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:03:37,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:03:37,906 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:03:37,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:03:40,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:03:40,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:03:40,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:03:40,994 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:03:40,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1437328953] [2022-01-31 18:03:40,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1437328953] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:03:40,994 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:03:40,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [121] imperfect sequences [] total 121 [2022-01-31 18:03:40,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355775325] [2022-01-31 18:03:40,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:03:40,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2022-01-31 18:03:40,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:03:40,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2022-01-31 18:03:40,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7142, Invalid=7378, Unknown=0, NotChecked=0, Total=14520 [2022-01-31 18:03:40,997 INFO L87 Difference]: Start difference. First operand 251 states and 252 transitions. Second operand has 121 states, 121 states have (on average 2.024793388429752) internal successors, (245), 120 states have internal predecessors, (245), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:03:44,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:03:44,348 INFO L93 Difference]: Finished difference Result 264 states and 266 transitions. [2022-01-31 18:03:44,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-01-31 18:03:44,348 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 2.024793388429752) internal successors, (245), 120 states have internal predecessors, (245), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 250 [2022-01-31 18:03:44,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:03:44,349 INFO L225 Difference]: With dead ends: 264 [2022-01-31 18:03:44,349 INFO L226 Difference]: Without dead ends: 254 [2022-01-31 18:03:44,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7020 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=21420, Invalid=35462, Unknown=0, NotChecked=0, Total=56882 [2022-01-31 18:03:44,352 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 247 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:03:44,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 57 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:03:44,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-01-31 18:03:44,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 253. [2022-01-31 18:03:44,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 248 states have (on average 1.0080645161290323) internal successors, (250), 248 states have internal predecessors, (250), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:03:44,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 254 transitions. [2022-01-31 18:03:44,444 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 254 transitions. Word has length 250 [2022-01-31 18:03:44,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:03:44,444 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 254 transitions. [2022-01-31 18:03:44,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 2.024793388429752) internal successors, (245), 120 states have internal predecessors, (245), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:03:44,444 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 254 transitions. [2022-01-31 18:03:44,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2022-01-31 18:03:44,445 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:03:44,445 INFO L514 BasicCegarLoop]: trace histogram [118, 118, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:03:44,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2022-01-31 18:03:44,445 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:03:44,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:03:44,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1881033054, now seen corresponding path program 117 times [2022-01-31 18:03:44,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:03:44,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [380832380] [2022-01-31 18:03:44,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:03:44,446 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:03:44,446 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:03:44,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:03:44,454 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:03:44,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:03:47,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:03:47,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:03:47,410 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 18:03:47,411 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:03:47,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [380832380] [2022-01-31 18:03:47,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [380832380] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:03:47,411 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:03:47,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [122] imperfect sequences [] total 122 [2022-01-31 18:03:47,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162648253] [2022-01-31 18:03:47,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:03:47,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2022-01-31 18:03:47,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:03:47,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2022-01-31 18:03:47,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7262, Invalid=7500, Unknown=0, NotChecked=0, Total=14762 [2022-01-31 18:03:47,413 INFO L87 Difference]: Start difference. First operand 253 states and 254 transitions. Second operand has 122 states, 122 states have (on average 2.0245901639344264) internal successors, (247), 121 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 18:03:50,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:03:50,728 INFO L93 Difference]: Finished difference Result 266 states and 268 transitions. [2022-01-31 18:03:50,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-01-31 18:03:50,728 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 2.0245901639344264) internal successors, (247), 121 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 252 [2022-01-31 18:03:50,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:03:50,729 INFO L225 Difference]: With dead ends: 266 [2022-01-31 18:03:50,729 INFO L226 Difference]: Without dead ends: 256 [2022-01-31 18:03:50,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7139 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=21780, Invalid=36060, Unknown=0, NotChecked=0, Total=57840 [2022-01-31 18:03:50,732 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 249 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:03:50,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 42 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:03:50,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-01-31 18:03:50,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 255. [2022-01-31 18:03:50,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 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), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:03:50,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 256 transitions. [2022-01-31 18:03:50,816 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 256 transitions. Word has length 252 [2022-01-31 18:03:50,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:03:50,817 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 256 transitions. [2022-01-31 18:03:50,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 2.0245901639344264) internal successors, (247), 121 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 18:03:50,817 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 256 transitions. [2022-01-31 18:03:50,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2022-01-31 18:03:50,817 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:03:50,817 INFO L514 BasicCegarLoop]: trace histogram [119, 119, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:03:50,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2022-01-31 18:03:50,818 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:03:50,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:03:50,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1934045312, now seen corresponding path program 118 times [2022-01-31 18:03:50,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:03:50,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1547496055] [2022-01-31 18:03:50,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:03:50,819 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:03:50,819 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:03:50,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:03:50,826 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:03:50,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:03:54,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:03:54,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:03:54,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:03:54,084 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:03:54,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1547496055] [2022-01-31 18:03:54,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1547496055] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:03:54,084 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:03:54,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [123] imperfect sequences [] total 123 [2022-01-31 18:03:54,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317049920] [2022-01-31 18:03:54,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:03:54,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-01-31 18:03:54,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:03:54,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-01-31 18:03:54,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7383, Invalid=7623, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 18:03:54,087 INFO L87 Difference]: Start difference. First operand 255 states and 256 transitions. Second operand has 123 states, 123 states have (on average 2.024390243902439) internal successors, (249), 122 states have internal predecessors, (249), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:03:57,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:03:57,946 INFO L93 Difference]: Finished difference Result 268 states and 270 transitions. [2022-01-31 18:03:57,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-01-31 18:03:57,946 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 2.024390243902439) internal successors, (249), 122 states have internal predecessors, (249), 2 states have call successors, (3), 3 states have 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 18:03:57,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:03:57,946 INFO L225 Difference]: With dead ends: 268 [2022-01-31 18:03:57,946 INFO L226 Difference]: Without dead ends: 258 [2022-01-31 18:03:57,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7259 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=22143, Invalid=36663, Unknown=0, NotChecked=0, Total=58806 [2022-01-31 18:03:57,949 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 251 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:03:57,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 42 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:03:57,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-01-31 18:03:58,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 257. [2022-01-31 18:03:58,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 252 states have (on average 1.007936507936508) internal successors, (254), 252 states have internal predecessors, (254), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:03:58,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 258 transitions. [2022-01-31 18:03:58,031 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 258 transitions. Word has length 254 [2022-01-31 18:03:58,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:03:58,031 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 258 transitions. [2022-01-31 18:03:58,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 2.024390243902439) internal successors, (249), 122 states have internal predecessors, (249), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:03:58,032 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 258 transitions. [2022-01-31 18:03:58,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2022-01-31 18:03:58,032 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:03:58,032 INFO L514 BasicCegarLoop]: trace histogram [120, 120, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:03:58,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2022-01-31 18:03:58,033 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:03:58,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:03:58,033 INFO L85 PathProgramCache]: Analyzing trace with hash -322284254, now seen corresponding path program 119 times [2022-01-31 18:03:58,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:03:58,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [360043185] [2022-01-31 18:03:58,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:03:58,034 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:03:58,034 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:03:58,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:03:58,041 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:03:58,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:04:01,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:04:01,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:04:01,294 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 18:04:01,294 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:04:01,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [360043185] [2022-01-31 18:04:01,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [360043185] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:04:01,294 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:04:01,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [124] imperfect sequences [] total 124 [2022-01-31 18:04:01,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095297412] [2022-01-31 18:04:01,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:04:01,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2022-01-31 18:04:01,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:04:01,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2022-01-31 18:04:01,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7505, Invalid=7747, Unknown=0, NotChecked=0, Total=15252 [2022-01-31 18:04:01,296 INFO L87 Difference]: Start difference. First operand 257 states and 258 transitions. Second operand has 124 states, 124 states have (on average 2.024193548387097) internal successors, (251), 123 states have internal predecessors, (251), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:04:05,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:04:05,226 INFO L93 Difference]: Finished difference Result 270 states and 272 transitions. [2022-01-31 18:04:05,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-01-31 18:04:05,226 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 2.024193548387097) internal successors, (251), 123 states have internal predecessors, (251), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 256 [2022-01-31 18:04:05,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:04:05,227 INFO L225 Difference]: With dead ends: 270 [2022-01-31 18:04:05,227 INFO L226 Difference]: Without dead ends: 260 [2022-01-31 18:04:05,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7380 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=22509, Invalid=37271, Unknown=0, NotChecked=0, Total=59780 [2022-01-31 18:04:05,231 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 253 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:04:05,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 47 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:04:05,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-01-31 18:04:05,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 259. [2022-01-31 18:04:05,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 254 states have (on average 1.0078740157480315) internal successors, (256), 254 states have internal predecessors, (256), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:04:05,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 260 transitions. [2022-01-31 18:04:05,326 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 260 transitions. Word has length 256 [2022-01-31 18:04:05,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:04:05,327 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 260 transitions. [2022-01-31 18:04:05,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 2.024193548387097) internal successors, (251), 123 states have internal predecessors, (251), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:04:05,327 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 260 transitions. [2022-01-31 18:04:05,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2022-01-31 18:04:05,328 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:04:05,328 INFO L514 BasicCegarLoop]: trace histogram [121, 121, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:04:05,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2022-01-31 18:04:05,328 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:04:05,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:04:05,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1903101372, now seen corresponding path program 120 times [2022-01-31 18:04:05,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:04:05,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [903897372] [2022-01-31 18:04:05,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:04:05,329 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:04:05,329 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:04:05,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:04:05,338 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:04:05,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:04:08,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:04:08,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:04:08,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:04:08,102 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:04:08,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [903897372] [2022-01-31 18:04:08,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [903897372] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:04:08,103 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:04:08,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [125] imperfect sequences [] total 125 [2022-01-31 18:04:08,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641366259] [2022-01-31 18:04:08,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:04:08,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2022-01-31 18:04:08,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:04:08,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2022-01-31 18:04:08,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7628, Invalid=7872, Unknown=0, NotChecked=0, Total=15500 [2022-01-31 18:04:08,106 INFO L87 Difference]: Start difference. First operand 259 states and 260 transitions. Second operand has 125 states, 125 states have (on average 2.024) internal successors, (253), 124 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 18:04:11,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:04:11,631 INFO L93 Difference]: Finished difference Result 272 states and 274 transitions. [2022-01-31 18:04:11,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-01-31 18:04:11,631 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 2.024) internal successors, (253), 124 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 258 [2022-01-31 18:04:11,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:04:11,632 INFO L225 Difference]: With dead ends: 272 [2022-01-31 18:04:11,632 INFO L226 Difference]: Without dead ends: 262 [2022-01-31 18:04:11,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7502 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=22878, Invalid=37884, Unknown=0, NotChecked=0, Total=60762 [2022-01-31 18:04:11,635 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 255 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:04:11,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 32 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:04:11,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-01-31 18:04:11,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 261. [2022-01-31 18:04:11,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 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), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:04:11,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 262 transitions. [2022-01-31 18:04:11,720 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 262 transitions. Word has length 258 [2022-01-31 18:04:11,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:04:11,720 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 262 transitions. [2022-01-31 18:04:11,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 2.024) internal successors, (253), 124 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 18:04:11,720 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 262 transitions. [2022-01-31 18:04:11,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2022-01-31 18:04:11,721 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:04:11,721 INFO L514 BasicCegarLoop]: trace histogram [122, 122, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:04:11,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2022-01-31 18:04:11,722 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:04:11,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:04:11,722 INFO L85 PathProgramCache]: Analyzing trace with hash -649928986, now seen corresponding path program 121 times [2022-01-31 18:04:11,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:04:11,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2052828785] [2022-01-31 18:04:11,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:04:11,723 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:04:11,723 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:04:11,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:04:11,730 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:04:11,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:04:15,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:04:15,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:04:15,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:04:15,599 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:04:15,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2052828785] [2022-01-31 18:04:15,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2052828785] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:04:15,599 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:04:15,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [126] imperfect sequences [] total 126 [2022-01-31 18:04:15,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016651847] [2022-01-31 18:04:15,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:04:15,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2022-01-31 18:04:15,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:04:15,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2022-01-31 18:04:15,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7752, Invalid=7998, Unknown=0, NotChecked=0, Total=15750 [2022-01-31 18:04:15,603 INFO L87 Difference]: Start difference. First operand 261 states and 262 transitions. Second operand has 126 states, 126 states have (on average 2.0238095238095237) internal successors, (255), 125 states have internal predecessors, (255), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:04:22,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:04:22,574 INFO L93 Difference]: Finished difference Result 274 states and 276 transitions. [2022-01-31 18:04:22,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-01-31 18:04:22,574 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 2.0238095238095237) internal successors, (255), 125 states have internal predecessors, (255), 2 states have call successors, (3), 3 states have 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 18:04:22,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:04:22,575 INFO L225 Difference]: With dead ends: 274 [2022-01-31 18:04:22,575 INFO L226 Difference]: Without dead ends: 264 [2022-01-31 18:04:22,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7625 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=23250, Invalid=38502, Unknown=0, NotChecked=0, Total=61752 [2022-01-31 18:04:22,580 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 257 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:04:22,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 47 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:04:22,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-01-31 18:04:22,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 263. [2022-01-31 18:04:22,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 258 states have (on average 1.0077519379844961) internal successors, (260), 258 states have internal predecessors, (260), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:04:22,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 264 transitions. [2022-01-31 18:04:22,712 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 264 transitions. Word has length 260 [2022-01-31 18:04:22,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:04:22,712 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 264 transitions. [2022-01-31 18:04:22,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 2.0238095238095237) internal successors, (255), 125 states have internal predecessors, (255), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:04:22,713 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 264 transitions. [2022-01-31 18:04:22,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2022-01-31 18:04:22,713 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:04:22,713 INFO L514 BasicCegarLoop]: trace histogram [123, 123, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:04:22,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2022-01-31 18:04:22,714 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:04:22,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:04:22,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1057891080, now seen corresponding path program 122 times [2022-01-31 18:04:22,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:04:22,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1554076870] [2022-01-31 18:04:22,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:04:22,716 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:04:22,716 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:04:22,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:04:22,726 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:04:22,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:04:27,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:04:27,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:04:27,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:04:27,429 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:04:27,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1554076870] [2022-01-31 18:04:27,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1554076870] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:04:27,429 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:04:27,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [127] imperfect sequences [] total 127 [2022-01-31 18:04:27,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773308074] [2022-01-31 18:04:27,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:04:27,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2022-01-31 18:04:27,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:04:27,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2022-01-31 18:04:27,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7877, Invalid=8125, Unknown=0, NotChecked=0, Total=16002 [2022-01-31 18:04:27,432 INFO L87 Difference]: Start difference. First operand 263 states and 264 transitions. Second operand has 127 states, 127 states have (on average 2.0236220472440944) internal successors, (257), 126 states have internal predecessors, (257), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:04:31,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:04:31,722 INFO L93 Difference]: Finished difference Result 276 states and 278 transitions. [2022-01-31 18:04:31,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-01-31 18:04:31,723 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 2.0236220472440944) internal successors, (257), 126 states have internal predecessors, (257), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 262 [2022-01-31 18:04:31,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:04:31,723 INFO L225 Difference]: With dead ends: 276 [2022-01-31 18:04:31,723 INFO L226 Difference]: Without dead ends: 266 [2022-01-31 18:04:31,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 249 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7749 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=23625, Invalid=39125, Unknown=0, NotChecked=0, Total=62750 [2022-01-31 18:04:31,726 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 259 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:04:31,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 32 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:04:31,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-01-31 18:04:31,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 265. [2022-01-31 18:04:31,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 260 states have (on average 1.0076923076923077) internal successors, (262), 260 states have internal predecessors, (262), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:04:31,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 266 transitions. [2022-01-31 18:04:31,815 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 266 transitions. Word has length 262 [2022-01-31 18:04:31,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:04:31,815 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 266 transitions. [2022-01-31 18:04:31,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 127 states have (on average 2.0236220472440944) internal successors, (257), 126 states have internal predecessors, (257), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:04:31,815 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 266 transitions. [2022-01-31 18:04:31,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2022-01-31 18:04:31,816 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:04:31,816 INFO L514 BasicCegarLoop]: trace histogram [124, 124, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:04:31,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2022-01-31 18:04:31,816 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:04:31,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:04:31,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1595467434, now seen corresponding path program 123 times [2022-01-31 18:04:31,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:04:31,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1066037553] [2022-01-31 18:04:31,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:04:31,817 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:04:31,818 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:04:31,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:04:31,826 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:04:31,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:04:35,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:04:35,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:04:35,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:04:35,200 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:04:35,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1066037553] [2022-01-31 18:04:35,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1066037553] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:04:35,200 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:04:35,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [128] imperfect sequences [] total 128 [2022-01-31 18:04:35,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146589269] [2022-01-31 18:04:35,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:04:35,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-01-31 18:04:35,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:04:35,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-01-31 18:04:35,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8003, Invalid=8253, Unknown=0, NotChecked=0, Total=16256 [2022-01-31 18:04:35,203 INFO L87 Difference]: Start difference. First operand 265 states and 266 transitions. Second operand has 128 states, 128 states have (on average 2.0234375) internal successors, (259), 127 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 18:04:39,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:04:39,516 INFO L93 Difference]: Finished difference Result 278 states and 280 transitions. [2022-01-31 18:04:39,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-01-31 18:04:39,517 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 2.0234375) internal successors, (259), 127 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 264 [2022-01-31 18:04:39,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:04:39,517 INFO L225 Difference]: With dead ends: 278 [2022-01-31 18:04:39,517 INFO L226 Difference]: Without dead ends: 268 [2022-01-31 18:04:39,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7874 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=24003, Invalid=39753, Unknown=0, NotChecked=0, Total=63756 [2022-01-31 18:04:39,520 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 261 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:04:39,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 32 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:04:39,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-01-31 18:04:39,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 267. [2022-01-31 18:04:39,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 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), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:04:39,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 268 transitions. [2022-01-31 18:04:39,609 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 268 transitions. Word has length 264 [2022-01-31 18:04:39,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:04:39,610 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 268 transitions. [2022-01-31 18:04:39,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 2.0234375) internal successors, (259), 127 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 18:04:39,610 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 268 transitions. [2022-01-31 18:04:39,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-01-31 18:04:39,611 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:04:39,611 INFO L514 BasicCegarLoop]: trace histogram [125, 125, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:04:39,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2022-01-31 18:04:39,611 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:04:39,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:04:39,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1484699188, now seen corresponding path program 124 times [2022-01-31 18:04:39,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:04:39,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1966901521] [2022-01-31 18:04:39,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:04:39,614 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:04:39,614 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:04:39,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:04:39,622 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:04:39,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:04:42,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:04:42,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:04:42,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:04:42,990 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:04:42,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1966901521] [2022-01-31 18:04:42,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1966901521] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:04:42,990 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:04:42,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [129] imperfect sequences [] total 129 [2022-01-31 18:04:42,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668425188] [2022-01-31 18:04:42,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:04:42,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2022-01-31 18:04:42,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:04:42,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2022-01-31 18:04:42,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8130, Invalid=8382, Unknown=0, NotChecked=0, Total=16512 [2022-01-31 18:04:42,994 INFO L87 Difference]: Start difference. First operand 267 states and 268 transitions. Second operand has 129 states, 129 states have (on average 2.0232558139534884) internal successors, (261), 128 states have internal predecessors, (261), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:04:49,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:04:49,642 INFO L93 Difference]: Finished difference Result 280 states and 282 transitions. [2022-01-31 18:04:49,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-01-31 18:04:49,642 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 2.0232558139534884) internal successors, (261), 128 states have internal predecessors, (261), 2 states have call successors, (3), 3 states have 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 18:04:49,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:04:49,643 INFO L225 Difference]: With dead ends: 280 [2022-01-31 18:04:49,643 INFO L226 Difference]: Without dead ends: 270 [2022-01-31 18:04:49,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8000 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=24384, Invalid=40386, Unknown=0, NotChecked=0, Total=64770 [2022-01-31 18:04:49,647 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 263 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:04:49,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 52 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:04:49,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-01-31 18:04:49,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 269. [2022-01-31 18:04:49,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 264 states have (on average 1.0075757575757576) internal successors, (266), 264 states have internal predecessors, (266), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:04:49,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 270 transitions. [2022-01-31 18:04:49,770 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 270 transitions. Word has length 266 [2022-01-31 18:04:49,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:04:49,770 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 270 transitions. [2022-01-31 18:04:49,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 2.0232558139534884) internal successors, (261), 128 states have internal predecessors, (261), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:04:49,770 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 270 transitions. [2022-01-31 18:04:49,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2022-01-31 18:04:49,771 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:04:49,771 INFO L514 BasicCegarLoop]: trace histogram [126, 126, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:04:49,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2022-01-31 18:04:49,771 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:04:49,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:04:49,771 INFO L85 PathProgramCache]: Analyzing trace with hash 2002611310, now seen corresponding path program 125 times [2022-01-31 18:04:49,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:04:49,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [401613427] [2022-01-31 18:04:49,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:04:49,773 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:04:49,773 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:04:49,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:04:49,783 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:04:49,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:04:53,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:04:53,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:04:53,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:04:53,415 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:04:53,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [401613427] [2022-01-31 18:04:53,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [401613427] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:04:53,416 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:04:53,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [130] imperfect sequences [] total 130 [2022-01-31 18:04:53,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677312549] [2022-01-31 18:04:53,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:04:53,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-01-31 18:04:53,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:04:53,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-01-31 18:04:53,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8258, Invalid=8512, Unknown=0, NotChecked=0, Total=16770 [2022-01-31 18:04:53,419 INFO L87 Difference]: Start difference. First operand 269 states and 270 transitions. Second operand has 130 states, 130 states have (on average 2.023076923076923) internal successors, (263), 129 states have internal predecessors, (263), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:04:57,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:04:57,900 INFO L93 Difference]: Finished difference Result 282 states and 284 transitions. [2022-01-31 18:04:57,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-01-31 18:04:57,901 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 130 states have (on average 2.023076923076923) internal successors, (263), 129 states have internal predecessors, (263), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 268 [2022-01-31 18:04:57,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:04:57,901 INFO L225 Difference]: With dead ends: 282 [2022-01-31 18:04:57,901 INFO L226 Difference]: Without dead ends: 272 [2022-01-31 18:04:57,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8127 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=24768, Invalid=41024, Unknown=0, NotChecked=0, Total=65792 [2022-01-31 18:04:57,905 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 265 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:04:57,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 37 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:04:57,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-01-31 18:04:57,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 271. [2022-01-31 18:04:58,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 266 states have (on average 1.0075187969924813) internal successors, (268), 266 states have internal predecessors, (268), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:04:58,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 272 transitions. [2022-01-31 18:04:58,000 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 272 transitions. Word has length 268 [2022-01-31 18:04:58,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:04:58,000 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 272 transitions. [2022-01-31 18:04:58,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 2.023076923076923) internal successors, (263), 129 states have internal predecessors, (263), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:04:58,001 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 272 transitions. [2022-01-31 18:04:58,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2022-01-31 18:04:58,001 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:04:58,002 INFO L514 BasicCegarLoop]: trace histogram [127, 127, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:04:58,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2022-01-31 18:04:58,002 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:04:58,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:04:58,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1061458288, now seen corresponding path program 126 times [2022-01-31 18:04:58,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:04:58,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [910522240] [2022-01-31 18:04:58,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:04:58,004 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:04:58,004 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:04:58,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:04:58,013 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:04:58,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:05:01,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:05:01,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:05:01,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:05:01,422 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:05:01,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [910522240] [2022-01-31 18:05:01,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [910522240] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:05:01,422 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:05:01,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [131] imperfect sequences [] total 131 [2022-01-31 18:05:01,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751461293] [2022-01-31 18:05:01,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:05:01,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2022-01-31 18:05:01,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:05:01,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2022-01-31 18:05:01,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8387, Invalid=8643, Unknown=0, NotChecked=0, Total=17030 [2022-01-31 18:05:01,425 INFO L87 Difference]: Start difference. First operand 271 states and 272 transitions. Second operand has 131 states, 131 states have (on average 2.0229007633587788) internal successors, (265), 130 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 18:05:05,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:05:05,356 INFO L93 Difference]: Finished difference Result 284 states and 286 transitions. [2022-01-31 18:05:05,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-01-31 18:05:05,356 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 2.0229007633587788) internal successors, (265), 130 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 270 [2022-01-31 18:05:05,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:05:05,357 INFO L225 Difference]: With dead ends: 284 [2022-01-31 18:05:05,357 INFO L226 Difference]: Without dead ends: 274 [2022-01-31 18:05:05,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8255 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=25155, Invalid=41667, Unknown=0, NotChecked=0, Total=66822 [2022-01-31 18:05:05,360 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 267 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:05:05,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 57 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:05:05,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2022-01-31 18:05:05,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 273. [2022-01-31 18:05:05,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 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), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:05:05,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 274 transitions. [2022-01-31 18:05:05,462 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 274 transitions. Word has length 270 [2022-01-31 18:05:05,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:05:05,462 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 274 transitions. [2022-01-31 18:05:05,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 2.0229007633587788) internal successors, (265), 130 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 18:05:05,462 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 274 transitions. [2022-01-31 18:05:05,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2022-01-31 18:05:05,463 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:05:05,463 INFO L514 BasicCegarLoop]: trace histogram [128, 128, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:05:05,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2022-01-31 18:05:05,464 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:05:05,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:05:05,464 INFO L85 PathProgramCache]: Analyzing trace with hash 715223090, now seen corresponding path program 127 times [2022-01-31 18:05:05,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:05:05,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1452279723] [2022-01-31 18:05:05,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:05:05,474 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:05:05,474 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:05:05,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:05:05,485 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:05:05,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:05:08,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:05:08,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:05:08,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:05:08,642 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:05:08,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1452279723] [2022-01-31 18:05:08,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1452279723] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:05:08,642 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:05:08,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [132] imperfect sequences [] total 132 [2022-01-31 18:05:08,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055296746] [2022-01-31 18:05:08,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:05:08,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2022-01-31 18:05:08,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:05:08,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2022-01-31 18:05:08,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8517, Invalid=8775, Unknown=0, NotChecked=0, Total=17292 [2022-01-31 18:05:08,644 INFO L87 Difference]: Start difference. First operand 273 states and 274 transitions. Second operand has 132 states, 132 states have (on average 2.022727272727273) internal successors, (267), 131 states have internal predecessors, (267), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:05:13,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:05:13,048 INFO L93 Difference]: Finished difference Result 286 states and 288 transitions. [2022-01-31 18:05:13,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-01-31 18:05:13,049 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 2.022727272727273) internal successors, (267), 131 states have internal predecessors, (267), 2 states have call successors, (3), 3 states have 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 18:05:13,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:05:13,049 INFO L225 Difference]: With dead ends: 286 [2022-01-31 18:05:13,049 INFO L226 Difference]: Without dead ends: 276 [2022-01-31 18:05:13,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 259 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8384 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=25545, Invalid=42315, Unknown=0, NotChecked=0, Total=67860 [2022-01-31 18:05:13,052 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 269 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:05:13,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [269 Valid, 37 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:05:13,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-01-31 18:05:13,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 275. [2022-01-31 18:05:13,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 270 states have (on average 1.0074074074074073) internal successors, (272), 270 states have internal predecessors, (272), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:05:13,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 276 transitions. [2022-01-31 18:05:13,145 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 276 transitions. Word has length 272 [2022-01-31 18:05:13,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:05:13,146 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 276 transitions. [2022-01-31 18:05:13,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 132 states have (on average 2.022727272727273) internal successors, (267), 131 states have internal predecessors, (267), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:05:13,146 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 276 transitions. [2022-01-31 18:05:13,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2022-01-31 18:05:13,147 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:05:13,147 INFO L514 BasicCegarLoop]: trace histogram [129, 129, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:05:13,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2022-01-31 18:05:13,147 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:05:13,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:05:13,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1290956460, now seen corresponding path program 128 times [2022-01-31 18:05:13,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:05:13,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1694650698] [2022-01-31 18:05:13,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:05:13,148 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:05:13,148 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:05:13,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:05:13,156 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:05:13,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:05:16,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:05:16,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:05:16,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:05:16,526 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:05:16,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1694650698] [2022-01-31 18:05:16,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1694650698] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:05:16,526 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:05:16,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [133] imperfect sequences [] total 133 [2022-01-31 18:05:16,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729714659] [2022-01-31 18:05:16,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:05:16,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2022-01-31 18:05:16,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:05:16,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2022-01-31 18:05:16,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8648, Invalid=8908, Unknown=0, NotChecked=0, Total=17556 [2022-01-31 18:05:16,530 INFO L87 Difference]: Start difference. First operand 275 states and 276 transitions. Second operand has 133 states, 133 states have (on average 2.0225563909774436) internal successors, (269), 132 states have internal predecessors, (269), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:05:21,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:05:21,059 INFO L93 Difference]: Finished difference Result 288 states and 290 transitions. [2022-01-31 18:05:21,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-01-31 18:05:21,059 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 133 states have (on average 2.0225563909774436) internal successors, (269), 132 states have internal predecessors, (269), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 274 [2022-01-31 18:05:21,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:05:21,060 INFO L225 Difference]: With dead ends: 288 [2022-01-31 18:05:21,060 INFO L226 Difference]: Without dead ends: 278 [2022-01-31 18:05:21,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 261 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8514 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=25938, Invalid=42968, Unknown=0, NotChecked=0, Total=68906 [2022-01-31 18:05:21,062 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 271 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:05:21,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 57 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:05:21,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-01-31 18:05:21,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 277. [2022-01-31 18:05:21,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 272 states have (on average 1.0073529411764706) internal successors, (274), 272 states have internal predecessors, (274), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:05:21,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 278 transitions. [2022-01-31 18:05:21,158 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 278 transitions. Word has length 274 [2022-01-31 18:05:21,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:05:21,158 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 278 transitions. [2022-01-31 18:05:21,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 133 states, 133 states have (on average 2.0225563909774436) internal successors, (269), 132 states have internal predecessors, (269), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:05:21,158 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 278 transitions. [2022-01-31 18:05:21,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2022-01-31 18:05:21,159 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:05:21,159 INFO L514 BasicCegarLoop]: trace histogram [130, 130, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:05:21,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2022-01-31 18:05:21,159 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:05:21,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:05:21,159 INFO L85 PathProgramCache]: Analyzing trace with hash -789188106, now seen corresponding path program 129 times [2022-01-31 18:05:21,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:05:21,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [125567349] [2022-01-31 18:05:21,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:05:21,161 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:05:21,161 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:05:21,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:05:21,169 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:05:21,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:05:25,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:05:25,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:05:25,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:05:25,218 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:05:25,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [125567349] [2022-01-31 18:05:25,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [125567349] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:05:25,218 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:05:25,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [134] imperfect sequences [] total 134 [2022-01-31 18:05:25,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241587056] [2022-01-31 18:05:25,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:05:25,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2022-01-31 18:05:25,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:05:25,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2022-01-31 18:05:25,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8780, Invalid=9042, Unknown=0, NotChecked=0, Total=17822 [2022-01-31 18:05:25,223 INFO L87 Difference]: Start difference. First operand 277 states and 278 transitions. Second operand has 134 states, 134 states have (on average 2.0223880597014925) internal successors, (271), 133 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 18:05:29,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:05:29,944 INFO L93 Difference]: Finished difference Result 290 states and 292 transitions. [2022-01-31 18:05:29,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2022-01-31 18:05:29,945 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 2.0223880597014925) internal successors, (271), 133 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 276 [2022-01-31 18:05:29,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:05:29,945 INFO L225 Difference]: With dead ends: 290 [2022-01-31 18:05:29,945 INFO L226 Difference]: Without dead ends: 280 [2022-01-31 18:05:29,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8645 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=26334, Invalid=43626, Unknown=0, NotChecked=0, Total=69960 [2022-01-31 18:05:29,948 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 273 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:05:29,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 52 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:05:29,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-01-31 18:05:30,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 279. [2022-01-31 18:05:30,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 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), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:05:30,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 280 transitions. [2022-01-31 18:05:30,046 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 280 transitions. Word has length 276 [2022-01-31 18:05:30,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:05:30,046 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 280 transitions. [2022-01-31 18:05:30,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 2.0223880597014925) internal successors, (271), 133 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 18:05:30,046 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 280 transitions. [2022-01-31 18:05:30,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-01-31 18:05:30,047 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:05:30,047 INFO L514 BasicCegarLoop]: trace histogram [131, 131, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:05:30,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2022-01-31 18:05:30,047 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:05:30,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:05:30,047 INFO L85 PathProgramCache]: Analyzing trace with hash 373862936, now seen corresponding path program 130 times [2022-01-31 18:05:30,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:05:30,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [986489931] [2022-01-31 18:05:30,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:05:30,048 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:05:30,048 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:05:30,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:05:30,056 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:05:30,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:05:33,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:05:33,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:05:33,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:05:33,774 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:05:33,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [986489931] [2022-01-31 18:05:33,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [986489931] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:05:33,774 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:05:33,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [135] imperfect sequences [] total 135 [2022-01-31 18:05:33,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922992933] [2022-01-31 18:05:33,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:05:33,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2022-01-31 18:05:33,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:05:33,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2022-01-31 18:05:33,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8913, Invalid=9177, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 18:05:33,781 INFO L87 Difference]: Start difference. First operand 279 states and 280 transitions. Second operand has 135 states, 135 states have (on average 2.022222222222222) internal successors, (273), 134 states have internal predecessors, (273), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:05:38,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:05:38,300 INFO L93 Difference]: Finished difference Result 292 states and 294 transitions. [2022-01-31 18:05:38,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2022-01-31 18:05:38,300 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 2.022222222222222) internal successors, (273), 134 states have internal predecessors, (273), 2 states have call successors, (3), 3 states have 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 18:05:38,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:05:38,301 INFO L225 Difference]: With dead ends: 292 [2022-01-31 18:05:38,301 INFO L226 Difference]: Without dead ends: 282 [2022-01-31 18:05:38,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 265 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8777 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=26733, Invalid=44289, Unknown=0, NotChecked=0, Total=71022 [2022-01-31 18:05:38,304 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 275 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:05:38,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 32 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:05:38,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-01-31 18:05:38,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 281. [2022-01-31 18:05:38,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 276 states have (on average 1.0072463768115942) internal successors, (278), 276 states have internal predecessors, (278), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:05:38,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 282 transitions. [2022-01-31 18:05:38,404 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 282 transitions. Word has length 278 [2022-01-31 18:05:38,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:05:38,404 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 282 transitions. [2022-01-31 18:05:38,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 2.022222222222222) internal successors, (273), 134 states have internal predecessors, (273), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:05:38,404 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 282 transitions. [2022-01-31 18:05:38,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2022-01-31 18:05:38,405 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:05:38,405 INFO L514 BasicCegarLoop]: trace histogram [132, 132, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:05:38,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2022-01-31 18:05:38,405 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:05:38,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:05:38,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1374417338, now seen corresponding path program 131 times [2022-01-31 18:05:38,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:05:38,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [176647989] [2022-01-31 18:05:38,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:05:38,411 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:05:38,411 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:05:38,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:05:38,419 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:05:38,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:05:43,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:05:43,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:05:43,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:05:43,252 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:05:43,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [176647989] [2022-01-31 18:05:43,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [176647989] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:05:43,252 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:05:43,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [136] imperfect sequences [] total 136 [2022-01-31 18:05:43,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444950233] [2022-01-31 18:05:43,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:05:43,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 136 states [2022-01-31 18:05:43,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:05:43,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2022-01-31 18:05:43,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9047, Invalid=9313, Unknown=0, NotChecked=0, Total=18360 [2022-01-31 18:05:43,255 INFO L87 Difference]: Start difference. First operand 281 states and 282 transitions. Second operand has 136 states, 136 states have (on average 2.0220588235294117) internal successors, (275), 135 states have internal predecessors, (275), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:05:48,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:05:48,343 INFO L93 Difference]: Finished difference Result 294 states and 296 transitions. [2022-01-31 18:05:48,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2022-01-31 18:05:48,344 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 136 states have (on average 2.0220588235294117) internal successors, (275), 135 states have internal predecessors, (275), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 280 [2022-01-31 18:05:48,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:05:48,344 INFO L225 Difference]: With dead ends: 294 [2022-01-31 18:05:48,344 INFO L226 Difference]: Without dead ends: 284 [2022-01-31 18:05:48,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 267 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8910 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=27135, Invalid=44957, Unknown=0, NotChecked=0, Total=72092 [2022-01-31 18:05:48,348 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 277 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:05:48,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 52 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:05:48,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-01-31 18:05:48,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 283. [2022-01-31 18:05:48,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 278 states have (on average 1.0071942446043165) internal successors, (280), 278 states have internal predecessors, (280), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:05:48,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 284 transitions. [2022-01-31 18:05:48,478 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 284 transitions. Word has length 280 [2022-01-31 18:05:48,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:05:48,478 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 284 transitions. [2022-01-31 18:05:48,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 136 states, 136 states have (on average 2.0220588235294117) internal successors, (275), 135 states have internal predecessors, (275), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:05:48,478 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 284 transitions. [2022-01-31 18:05:48,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2022-01-31 18:05:48,479 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:05:48,479 INFO L514 BasicCegarLoop]: trace histogram [133, 133, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:05:48,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2022-01-31 18:05:48,479 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:05:48,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:05:48,479 INFO L85 PathProgramCache]: Analyzing trace with hash 834523356, now seen corresponding path program 132 times [2022-01-31 18:05:48,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:05:48,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1193909854] [2022-01-31 18:05:48,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:05:48,481 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:05:48,481 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:05:48,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:05:48,489 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:05:48,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:05:52,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:05:52,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:05:52,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:05:52,669 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:05:52,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1193909854] [2022-01-31 18:05:52,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1193909854] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:05:52,669 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:05:52,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [137] imperfect sequences [] total 137 [2022-01-31 18:05:52,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171818076] [2022-01-31 18:05:52,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:05:52,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2022-01-31 18:05:52,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:05:52,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2022-01-31 18:05:52,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9182, Invalid=9450, Unknown=0, NotChecked=0, Total=18632 [2022-01-31 18:05:52,673 INFO L87 Difference]: Start difference. First operand 283 states and 284 transitions. Second operand has 137 states, 137 states have (on average 2.021897810218978) internal successors, (277), 136 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 18:05:56,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:05:56,891 INFO L93 Difference]: Finished difference Result 296 states and 298 transitions. [2022-01-31 18:05:56,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-01-31 18:05:56,892 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 137 states have (on average 2.021897810218978) internal successors, (277), 136 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 282 [2022-01-31 18:05:56,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:05:56,892 INFO L225 Difference]: With dead ends: 296 [2022-01-31 18:05:56,892 INFO L226 Difference]: Without dead ends: 286 [2022-01-31 18:05:56,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9044 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=27540, Invalid=45630, Unknown=0, NotChecked=0, Total=73170 [2022-01-31 18:05:56,895 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 279 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:05:56,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 42 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:05:56,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2022-01-31 18:05:56,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 285. [2022-01-31 18:05:56,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 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), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:05:56,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 286 transitions. [2022-01-31 18:05:56,996 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 286 transitions. Word has length 282 [2022-01-31 18:05:56,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:05:56,996 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 286 transitions. [2022-01-31 18:05:56,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 137 states, 137 states have (on average 2.021897810218978) internal successors, (277), 136 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 18:05:56,996 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 286 transitions. [2022-01-31 18:05:56,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2022-01-31 18:05:56,997 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:05:56,997 INFO L514 BasicCegarLoop]: trace histogram [134, 134, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:05:56,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2022-01-31 18:05:56,997 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:05:56,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:05:56,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1687449470, now seen corresponding path program 133 times [2022-01-31 18:05:56,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:05:56,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1393865945] [2022-01-31 18:05:56,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:05:56,999 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:05:56,999 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:05:56,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:05:57,008 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:05:57,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:06:00,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:06:00,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:06:00,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:06:00,331 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:06:00,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1393865945] [2022-01-31 18:06:00,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1393865945] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:06:00,331 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:06:00,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [138] imperfect sequences [] total 138 [2022-01-31 18:06:00,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947805424] [2022-01-31 18:06:00,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:06:00,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 138 states [2022-01-31 18:06:00,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:06:00,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2022-01-31 18:06:00,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9318, Invalid=9588, Unknown=0, NotChecked=0, Total=18906 [2022-01-31 18:06:00,335 INFO L87 Difference]: Start difference. First operand 285 states and 286 transitions. Second operand has 138 states, 138 states have (on average 2.0217391304347827) internal successors, (279), 137 states have internal predecessors, (279), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:06:04,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:06:04,862 INFO L93 Difference]: Finished difference Result 298 states and 300 transitions. [2022-01-31 18:06:04,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2022-01-31 18:06:04,862 INFO L78 Accepts]: Start accepts. Automaton has has 138 states, 138 states have (on average 2.0217391304347827) internal successors, (279), 137 states have internal predecessors, (279), 2 states have call successors, (3), 3 states have 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 18:06:04,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:06:04,863 INFO L225 Difference]: With dead ends: 298 [2022-01-31 18:06:04,863 INFO L226 Difference]: Without dead ends: 288 [2022-01-31 18:06:04,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 271 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9179 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=27948, Invalid=46308, Unknown=0, NotChecked=0, Total=74256 [2022-01-31 18:06:04,867 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 281 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:06:04,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 32 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:06:04,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-01-31 18:06:04,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 287. [2022-01-31 18:06:04,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 282 states have (on average 1.0070921985815602) internal successors, (284), 282 states have internal predecessors, (284), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:06:04,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 288 transitions. [2022-01-31 18:06:04,986 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 288 transitions. Word has length 284 [2022-01-31 18:06:04,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:06:04,987 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 288 transitions. [2022-01-31 18:06:04,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 138 states, 138 states have (on average 2.0217391304347827) internal successors, (279), 137 states have internal predecessors, (279), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:06:04,987 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 288 transitions. [2022-01-31 18:06:04,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2022-01-31 18:06:04,988 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:06:04,988 INFO L514 BasicCegarLoop]: trace histogram [135, 135, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:06:04,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2022-01-31 18:06:04,988 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:06:04,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:06:04,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1010691488, now seen corresponding path program 134 times [2022-01-31 18:06:04,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:06:04,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1128621431] [2022-01-31 18:06:04,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:06:04,989 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:06:04,989 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:06:04,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:06:04,999 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:06:05,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:06:08,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:06:08,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:06:08,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:06:08,607 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:06:08,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1128621431] [2022-01-31 18:06:08,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1128621431] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:06:08,607 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:06:08,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [139] imperfect sequences [] total 139 [2022-01-31 18:06:08,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099349873] [2022-01-31 18:06:08,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:06:08,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 139 states [2022-01-31 18:06:08,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:06:08,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2022-01-31 18:06:08,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9455, Invalid=9727, Unknown=0, NotChecked=0, Total=19182 [2022-01-31 18:06:08,610 INFO L87 Difference]: Start difference. First operand 287 states and 288 transitions. Second operand has 139 states, 139 states have (on average 2.0215827338129495) internal successors, (281), 138 states have internal predecessors, (281), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:06:13,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:06:13,357 INFO L93 Difference]: Finished difference Result 300 states and 302 transitions. [2022-01-31 18:06:13,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2022-01-31 18:06:13,357 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 139 states have (on average 2.0215827338129495) internal successors, (281), 138 states have internal predecessors, (281), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 286 [2022-01-31 18:06:13,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:06:13,357 INFO L225 Difference]: With dead ends: 300 [2022-01-31 18:06:13,358 INFO L226 Difference]: Without dead ends: 290 [2022-01-31 18:06:13,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 273 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9315 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=28359, Invalid=46991, Unknown=0, NotChecked=0, Total=75350 [2022-01-31 18:06:13,361 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 283 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:06:13,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 42 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:06:13,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-01-31 18:06:13,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 289. [2022-01-31 18:06:13,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 284 states have (on average 1.0070422535211268) internal successors, (286), 284 states have internal predecessors, (286), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:06:13,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 290 transitions. [2022-01-31 18:06:13,464 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 290 transitions. Word has length 286 [2022-01-31 18:06:13,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:06:13,465 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 290 transitions. [2022-01-31 18:06:13,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 139 states, 139 states have (on average 2.0215827338129495) internal successors, (281), 138 states have internal predecessors, (281), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:06:13,465 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 290 transitions. [2022-01-31 18:06:13,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2022-01-31 18:06:13,466 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:06:13,466 INFO L514 BasicCegarLoop]: trace histogram [136, 136, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:06:13,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2022-01-31 18:06:13,466 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:06:13,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:06:13,466 INFO L85 PathProgramCache]: Analyzing trace with hash -813667518, now seen corresponding path program 135 times [2022-01-31 18:06:13,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:06:13,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [901257428] [2022-01-31 18:06:13,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:06:13,467 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:06:13,467 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:06:13,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:06:13,477 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:06:13,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:06:17,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:06:17,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:06:17,339 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 18:06:17,339 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:06:17,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [901257428] [2022-01-31 18:06:17,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [901257428] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:06:17,339 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:06:17,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [140] imperfect sequences [] total 140 [2022-01-31 18:06:17,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951924314] [2022-01-31 18:06:17,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:06:17,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2022-01-31 18:06:17,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:06:17,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2022-01-31 18:06:17,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9593, Invalid=9867, Unknown=0, NotChecked=0, Total=19460 [2022-01-31 18:06:17,342 INFO L87 Difference]: Start difference. First operand 289 states and 290 transitions. Second operand has 140 states, 140 states have (on average 2.0214285714285714) internal successors, (283), 139 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 18:06:21,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:06:21,923 INFO L93 Difference]: Finished difference Result 302 states and 304 transitions. [2022-01-31 18:06:21,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2022-01-31 18:06:21,924 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 2.0214285714285714) internal successors, (283), 139 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 288 [2022-01-31 18:06:21,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:06:21,924 INFO L225 Difference]: With dead ends: 302 [2022-01-31 18:06:21,924 INFO L226 Difference]: Without dead ends: 292 [2022-01-31 18:06:21,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9452 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=28773, Invalid=47679, Unknown=0, NotChecked=0, Total=76452 [2022-01-31 18:06:21,927 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 285 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:06:21,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 42 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:06:21,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2022-01-31 18:06:22,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 291. [2022-01-31 18:06:22,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 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), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:06:22,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 292 transitions. [2022-01-31 18:06:22,035 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 292 transitions. Word has length 288 [2022-01-31 18:06:22,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:06:22,035 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 292 transitions. [2022-01-31 18:06:22,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 140 states have (on average 2.0214285714285714) internal successors, (283), 139 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 18:06:22,035 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 292 transitions. [2022-01-31 18:06:22,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2022-01-31 18:06:22,036 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:06:22,036 INFO L514 BasicCegarLoop]: trace histogram [137, 137, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:06:22,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2022-01-31 18:06:22,036 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:06:22,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:06:22,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1676015516, now seen corresponding path program 136 times [2022-01-31 18:06:22,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:06:22,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1599022365] [2022-01-31 18:06:22,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:06:22,037 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:06:22,037 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:06:22,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:06:22,048 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:06:22,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:06:25,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:06:25,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:06:25,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:06:25,805 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:06:25,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1599022365] [2022-01-31 18:06:25,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1599022365] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:06:25,805 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:06:25,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [141] imperfect sequences [] total 141 [2022-01-31 18:06:25,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655612409] [2022-01-31 18:06:25,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:06:25,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 141 states [2022-01-31 18:06:25,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:06:25,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2022-01-31 18:06:25,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9732, Invalid=10008, Unknown=0, NotChecked=0, Total=19740 [2022-01-31 18:06:25,810 INFO L87 Difference]: Start difference. First operand 291 states and 292 transitions. Second operand has 141 states, 141 states have (on average 2.021276595744681) internal successors, (285), 140 states have internal predecessors, (285), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:06:30,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:06:30,288 INFO L93 Difference]: Finished difference Result 304 states and 306 transitions. [2022-01-31 18:06:30,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2022-01-31 18:06:30,288 INFO L78 Accepts]: Start accepts. Automaton has has 141 states, 141 states have (on average 2.021276595744681) internal successors, (285), 140 states have internal predecessors, (285), 2 states have call successors, (3), 3 states have 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 18:06:30,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:06:30,289 INFO L225 Difference]: With dead ends: 304 [2022-01-31 18:06:30,289 INFO L226 Difference]: Without dead ends: 294 [2022-01-31 18:06:30,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 277 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9590 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=29190, Invalid=48372, Unknown=0, NotChecked=0, Total=77562 [2022-01-31 18:06:30,293 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 287 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:06:30,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 32 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:06:30,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-01-31 18:06:30,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 293. [2022-01-31 18:06:30,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 288 states have (on average 1.0069444444444444) internal successors, (290), 288 states have internal predecessors, (290), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:06:30,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 294 transitions. [2022-01-31 18:06:30,413 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 294 transitions. Word has length 290 [2022-01-31 18:06:30,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:06:30,414 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 294 transitions. [2022-01-31 18:06:30,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 141 states, 141 states have (on average 2.021276595744681) internal successors, (285), 140 states have internal predecessors, (285), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:06:30,414 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 294 transitions. [2022-01-31 18:06:30,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2022-01-31 18:06:30,415 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:06:30,415 INFO L514 BasicCegarLoop]: trace histogram [138, 138, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:06:30,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2022-01-31 18:06:30,415 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:06:30,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:06:30,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1463753466, now seen corresponding path program 137 times [2022-01-31 18:06:30,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:06:30,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1292481046] [2022-01-31 18:06:30,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:06:30,416 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:06:30,416 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:06:30,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:06:30,426 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:06:30,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:06:33,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:06:33,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:06:33,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:06:33,937 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:06:33,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1292481046] [2022-01-31 18:06:33,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1292481046] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:06:33,937 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:06:33,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [142] imperfect sequences [] total 142 [2022-01-31 18:06:33,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788814088] [2022-01-31 18:06:33,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:06:33,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 142 states [2022-01-31 18:06:33,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:06:33,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2022-01-31 18:06:33,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9872, Invalid=10150, Unknown=0, NotChecked=0, Total=20022 [2022-01-31 18:06:33,941 INFO L87 Difference]: Start difference. First operand 293 states and 294 transitions. Second operand has 142 states, 142 states have (on average 2.0211267605633805) internal successors, (287), 141 states have internal predecessors, (287), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:06:38,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:06:38,403 INFO L93 Difference]: Finished difference Result 306 states and 308 transitions. [2022-01-31 18:06:38,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2022-01-31 18:06:38,404 INFO L78 Accepts]: Start accepts. Automaton has has 142 states, 142 states have (on average 2.0211267605633805) internal successors, (287), 141 states have internal predecessors, (287), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 292 [2022-01-31 18:06:38,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:06:38,404 INFO L225 Difference]: With dead ends: 306 [2022-01-31 18:06:38,404 INFO L226 Difference]: Without dead ends: 296 [2022-01-31 18:06:38,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 279 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9729 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=29610, Invalid=49070, Unknown=0, NotChecked=0, Total=78680 [2022-01-31 18:06:38,407 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 289 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:06:38,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [289 Valid, 72 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:06:38,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-01-31 18:06:38,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 295. [2022-01-31 18:06:38,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 290 states have (on average 1.006896551724138) internal successors, (292), 290 states have internal predecessors, (292), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:06:38,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 296 transitions. [2022-01-31 18:06:38,517 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 296 transitions. Word has length 292 [2022-01-31 18:06:38,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:06:38,517 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 296 transitions. [2022-01-31 18:06:38,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 142 states, 142 states have (on average 2.0211267605633805) internal successors, (287), 141 states have internal predecessors, (287), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:06:38,517 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 296 transitions. [2022-01-31 18:06:38,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2022-01-31 18:06:38,518 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:06:38,518 INFO L514 BasicCegarLoop]: trace histogram [139, 139, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:06:38,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2022-01-31 18:06:38,518 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:06:38,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:06:38,519 INFO L85 PathProgramCache]: Analyzing trace with hash 656613672, now seen corresponding path program 138 times [2022-01-31 18:06:38,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:06:38,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1599498005] [2022-01-31 18:06:38,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:06:38,520 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:06:38,520 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:06:38,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:06:38,529 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:06:38,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:06:42,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:06:42,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:06:42,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:06:42,194 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:06:42,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1599498005] [2022-01-31 18:06:42,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1599498005] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:06:42,195 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:06:42,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [143] imperfect sequences [] total 143 [2022-01-31 18:06:42,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306938386] [2022-01-31 18:06:42,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:06:42,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 143 states [2022-01-31 18:06:42,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:06:42,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2022-01-31 18:06:42,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10013, Invalid=10293, Unknown=0, NotChecked=0, Total=20306 [2022-01-31 18:06:42,198 INFO L87 Difference]: Start difference. First operand 295 states and 296 transitions. Second operand has 143 states, 143 states have (on average 2.020979020979021) internal successors, (289), 142 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 18:06:46,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:06:46,858 INFO L93 Difference]: Finished difference Result 308 states and 310 transitions. [2022-01-31 18:06:46,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2022-01-31 18:06:46,859 INFO L78 Accepts]: Start accepts. Automaton has has 143 states, 143 states have (on average 2.020979020979021) internal successors, (289), 142 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 294 [2022-01-31 18:06:46,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:06:46,859 INFO L225 Difference]: With dead ends: 308 [2022-01-31 18:06:46,860 INFO L226 Difference]: Without dead ends: 298 [2022-01-31 18:06:46,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 281 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9869 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=30033, Invalid=49773, Unknown=0, NotChecked=0, Total=79806 [2022-01-31 18:06:46,863 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 291 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:06:46,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 37 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:06:46,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2022-01-31 18:06:47,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 297. [2022-01-31 18:06:47,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 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), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:06:47,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 298 transitions. [2022-01-31 18:06:47,034 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 298 transitions. Word has length 294 [2022-01-31 18:06:47,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:06:47,035 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 298 transitions. [2022-01-31 18:06:47,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 143 states, 143 states have (on average 2.020979020979021) internal successors, (289), 142 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 18:06:47,035 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 298 transitions. [2022-01-31 18:06:47,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2022-01-31 18:06:47,036 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:06:47,036 INFO L514 BasicCegarLoop]: trace histogram [140, 140, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:06:47,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2022-01-31 18:06:47,036 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:06:47,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:06:47,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1780032310, now seen corresponding path program 139 times [2022-01-31 18:06:47,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:06:47,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [563322187] [2022-01-31 18:06:47,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:06:47,038 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:06:47,038 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:06:47,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:06:47,052 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:06:47,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:06:50,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:06:50,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:06:50,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:06:50,936 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:06:50,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [563322187] [2022-01-31 18:06:50,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [563322187] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:06:50,936 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:06:50,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [144] imperfect sequences [] total 144 [2022-01-31 18:06:50,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39912704] [2022-01-31 18:06:50,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:06:50,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 144 states [2022-01-31 18:06:50,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:06:50,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2022-01-31 18:06:50,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10155, Invalid=10437, Unknown=0, NotChecked=0, Total=20592 [2022-01-31 18:06:50,941 INFO L87 Difference]: Start difference. First operand 297 states and 298 transitions. Second operand has 144 states, 144 states have (on average 2.0208333333333335) internal successors, (291), 143 states have internal predecessors, (291), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:06:56,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:06:56,112 INFO L93 Difference]: Finished difference Result 310 states and 312 transitions. [2022-01-31 18:06:56,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2022-01-31 18:06:56,112 INFO L78 Accepts]: Start accepts. Automaton has has 144 states, 144 states have (on average 2.0208333333333335) internal successors, (291), 143 states have internal predecessors, (291), 2 states have call successors, (3), 3 states have 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 18:06:56,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:06:56,113 INFO L225 Difference]: With dead ends: 310 [2022-01-31 18:06:56,113 INFO L226 Difference]: Without dead ends: 300 [2022-01-31 18:06:56,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 283 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10010 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=30459, Invalid=50481, Unknown=0, NotChecked=0, Total=80940 [2022-01-31 18:06:56,116 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 293 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:06:56,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 32 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:06:56,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2022-01-31 18:06:56,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 299. [2022-01-31 18:06:56,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 294 states have (on average 1.0068027210884354) internal successors, (296), 294 states have internal predecessors, (296), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:06:56,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 300 transitions. [2022-01-31 18:06:56,227 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 300 transitions. Word has length 296 [2022-01-31 18:06:56,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:06:56,228 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 300 transitions. [2022-01-31 18:06:56,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 144 states, 144 states have (on average 2.0208333333333335) internal successors, (291), 143 states have internal predecessors, (291), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:06:56,228 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 300 transitions. [2022-01-31 18:06:56,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2022-01-31 18:06:56,229 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:06:56,229 INFO L514 BasicCegarLoop]: trace histogram [141, 141, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:06:56,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2022-01-31 18:06:56,229 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:06:56,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:06:56,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1655322604, now seen corresponding path program 140 times [2022-01-31 18:06:56,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:06:56,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1159031607] [2022-01-31 18:06:56,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:06:56,248 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:06:56,248 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:06:56,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:06:56,258 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:06:56,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:07:00,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:07:00,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:07:00,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:07:00,369 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:07:00,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1159031607] [2022-01-31 18:07:00,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1159031607] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:07:00,369 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:07:00,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [145] imperfect sequences [] total 145 [2022-01-31 18:07:00,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852260048] [2022-01-31 18:07:00,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:07:00,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 145 states [2022-01-31 18:07:00,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:07:00,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2022-01-31 18:07:00,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10298, Invalid=10582, Unknown=0, NotChecked=0, Total=20880 [2022-01-31 18:07:00,373 INFO L87 Difference]: Start difference. First operand 299 states and 300 transitions. Second operand has 145 states, 145 states have (on average 2.0206896551724136) internal successors, (293), 144 states have internal predecessors, (293), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:07:06,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:07:06,533 INFO L93 Difference]: Finished difference Result 312 states and 314 transitions. [2022-01-31 18:07:06,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2022-01-31 18:07:06,533 INFO L78 Accepts]: Start accepts. Automaton has has 145 states, 145 states have (on average 2.0206896551724136) internal successors, (293), 144 states have internal predecessors, (293), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 298 [2022-01-31 18:07:06,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:07:06,534 INFO L225 Difference]: With dead ends: 312 [2022-01-31 18:07:06,534 INFO L226 Difference]: Without dead ends: 302 [2022-01-31 18:07:06,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 285 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10152 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=30888, Invalid=51194, Unknown=0, NotChecked=0, Total=82082 [2022-01-31 18:07:06,539 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 295 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:07:06,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 42 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:07:06,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-01-31 18:07:06,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 301. [2022-01-31 18:07:06,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 296 states have (on average 1.0067567567567568) internal successors, (298), 296 states have internal predecessors, (298), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:07:06,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 302 transitions. [2022-01-31 18:07:06,682 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 302 transitions. Word has length 298 [2022-01-31 18:07:06,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:07:06,682 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 302 transitions. [2022-01-31 18:07:06,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 145 states, 145 states have (on average 2.0206896551724136) internal successors, (293), 144 states have internal predecessors, (293), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:07:06,683 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 302 transitions. [2022-01-31 18:07:06,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2022-01-31 18:07:06,683 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:07:06,683 INFO L514 BasicCegarLoop]: trace histogram [142, 142, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:07:06,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2022-01-31 18:07:06,684 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:07:06,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:07:06,685 INFO L85 PathProgramCache]: Analyzing trace with hash 201544334, now seen corresponding path program 141 times [2022-01-31 18:07:06,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:07:06,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1676191266] [2022-01-31 18:07:06,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:07:06,686 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:07:06,686 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:07:06,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:07:06,697 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:07:06,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:07:10,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:07:10,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:07:10,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:07:10,646 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:07:10,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1676191266] [2022-01-31 18:07:10,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1676191266] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:07:10,646 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:07:10,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [146] imperfect sequences [] total 146 [2022-01-31 18:07:10,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251880435] [2022-01-31 18:07:10,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:07:10,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2022-01-31 18:07:10,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:07:10,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2022-01-31 18:07:10,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10442, Invalid=10728, Unknown=0, NotChecked=0, Total=21170 [2022-01-31 18:07:10,650 INFO L87 Difference]: Start difference. First operand 301 states and 302 transitions. Second operand has 146 states, 146 states have (on average 2.0205479452054793) internal successors, (295), 145 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 18:07:15,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:07:15,587 INFO L93 Difference]: Finished difference Result 314 states and 316 transitions. [2022-01-31 18:07:15,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2022-01-31 18:07:15,587 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 146 states have (on average 2.0205479452054793) internal successors, (295), 145 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 300 [2022-01-31 18:07:15,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:07:15,587 INFO L225 Difference]: With dead ends: 314 [2022-01-31 18:07:15,588 INFO L226 Difference]: Without dead ends: 304 [2022-01-31 18:07:15,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 287 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10295 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=31320, Invalid=51912, Unknown=0, NotChecked=0, Total=83232 [2022-01-31 18:07:15,592 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 297 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:07:15,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 42 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:07:15,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-01-31 18:07:15,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 303. [2022-01-31 18:07:15,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 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), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:07:15,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 304 transitions. [2022-01-31 18:07:15,758 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 304 transitions. Word has length 300 [2022-01-31 18:07:15,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:07:15,759 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 304 transitions. [2022-01-31 18:07:15,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 146 states, 146 states have (on average 2.0205479452054793) internal successors, (295), 145 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 18:07:15,759 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 304 transitions. [2022-01-31 18:07:15,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2022-01-31 18:07:15,760 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:07:15,760 INFO L514 BasicCegarLoop]: trace histogram [143, 143, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:07:15,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2022-01-31 18:07:15,760 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:07:15,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:07:15,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1015001936, now seen corresponding path program 142 times [2022-01-31 18:07:15,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:07:15,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1779645724] [2022-01-31 18:07:15,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:07:15,762 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:07:15,762 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:07:15,762 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:07:15,772 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:07:15,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:07:19,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:07:19,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:07:19,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:07:19,763 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:07:19,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1779645724] [2022-01-31 18:07:19,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1779645724] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:07:19,763 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:07:19,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [147] imperfect sequences [] total 147 [2022-01-31 18:07:19,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878786127] [2022-01-31 18:07:19,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:07:19,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 147 states [2022-01-31 18:07:19,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:07:19,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2022-01-31 18:07:19,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10587, Invalid=10875, Unknown=0, NotChecked=0, Total=21462 [2022-01-31 18:07:19,767 INFO L87 Difference]: Start difference. First operand 303 states and 304 transitions. Second operand has 147 states, 147 states have (on average 2.020408163265306) internal successors, (297), 146 states have internal predecessors, (297), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:07:25,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:07:25,199 INFO L93 Difference]: Finished difference Result 316 states and 318 transitions. [2022-01-31 18:07:25,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2022-01-31 18:07:25,199 INFO L78 Accepts]: Start accepts. Automaton has has 147 states, 147 states have (on average 2.020408163265306) internal successors, (297), 146 states have internal predecessors, (297), 2 states have call successors, (3), 3 states have 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 18:07:25,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:07:25,200 INFO L225 Difference]: With dead ends: 316 [2022-01-31 18:07:25,200 INFO L226 Difference]: Without dead ends: 306 [2022-01-31 18:07:25,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 289 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10439 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=31755, Invalid=52635, Unknown=0, NotChecked=0, Total=84390 [2022-01-31 18:07:25,204 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 299 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:07:25,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [299 Valid, 37 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:07:25,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2022-01-31 18:07:25,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 305. [2022-01-31 18:07:25,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 300 states have (on average 1.0066666666666666) internal successors, (302), 300 states have internal predecessors, (302), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:07:25,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 306 transitions. [2022-01-31 18:07:25,342 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 306 transitions. Word has length 302 [2022-01-31 18:07:25,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:07:25,342 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 306 transitions. [2022-01-31 18:07:25,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 147 states, 147 states have (on average 2.020408163265306) internal successors, (297), 146 states have internal predecessors, (297), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:07:25,342 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 306 transitions. [2022-01-31 18:07:25,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2022-01-31 18:07:25,343 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:07:25,344 INFO L514 BasicCegarLoop]: trace histogram [144, 144, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:07:25,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2022-01-31 18:07:25,344 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:07:25,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:07:25,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1884862894, now seen corresponding path program 143 times [2022-01-31 18:07:25,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:07:25,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1828702722] [2022-01-31 18:07:25,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:07:25,345 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:07:25,345 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:07:25,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:07:25,355 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:07:25,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:07:29,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:07:29,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:07:29,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:07:29,258 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:07:29,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1828702722] [2022-01-31 18:07:29,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1828702722] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:07:29,258 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:07:29,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [148] imperfect sequences [] total 148 [2022-01-31 18:07:29,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410257207] [2022-01-31 18:07:29,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:07:29,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 148 states [2022-01-31 18:07:29,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:07:29,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2022-01-31 18:07:29,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10733, Invalid=11023, Unknown=0, NotChecked=0, Total=21756 [2022-01-31 18:07:29,262 INFO L87 Difference]: Start difference. First operand 305 states and 306 transitions. Second operand has 148 states, 148 states have (on average 2.02027027027027) internal successors, (299), 147 states have internal predecessors, (299), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:07:34,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:07:34,258 INFO L93 Difference]: Finished difference Result 318 states and 320 transitions. [2022-01-31 18:07:34,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2022-01-31 18:07:34,258 INFO L78 Accepts]: Start accepts. Automaton has has 148 states, 148 states have (on average 2.02027027027027) internal successors, (299), 147 states have internal predecessors, (299), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 304 [2022-01-31 18:07:34,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:07:34,259 INFO L225 Difference]: With dead ends: 318 [2022-01-31 18:07:34,259 INFO L226 Difference]: Without dead ends: 308 [2022-01-31 18:07:34,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 291 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10584 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=32193, Invalid=53363, Unknown=0, NotChecked=0, Total=85556 [2022-01-31 18:07:34,263 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 301 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:07:34,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 52 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:07:34,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-01-31 18:07:34,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 307. [2022-01-31 18:07:34,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 302 states have (on average 1.0066225165562914) internal successors, (304), 302 states have internal predecessors, (304), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:07:34,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 308 transitions. [2022-01-31 18:07:34,407 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 308 transitions. Word has length 304 [2022-01-31 18:07:34,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:07:34,407 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 308 transitions. [2022-01-31 18:07:34,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 148 states, 148 states have (on average 2.02027027027027) internal successors, (299), 147 states have internal predecessors, (299), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:07:34,408 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 308 transitions. [2022-01-31 18:07:34,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2022-01-31 18:07:34,408 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:07:34,409 INFO L514 BasicCegarLoop]: trace histogram [145, 145, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:07:34,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2022-01-31 18:07:34,409 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:07:34,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:07:34,409 INFO L85 PathProgramCache]: Analyzing trace with hash -302620812, now seen corresponding path program 144 times [2022-01-31 18:07:34,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:07:34,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [813602561] [2022-01-31 18:07:34,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:07:34,410 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:07:34,410 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:07:34,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:07:34,421 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:07:34,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:07:38,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:07:38,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:07:38,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:07:38,838 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:07:38,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [813602561] [2022-01-31 18:07:38,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [813602561] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:07:38,838 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:07:38,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [149] imperfect sequences [] total 149 [2022-01-31 18:07:38,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638464873] [2022-01-31 18:07:38,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:07:38,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 149 states [2022-01-31 18:07:38,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:07:38,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2022-01-31 18:07:38,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10880, Invalid=11172, Unknown=0, NotChecked=0, Total=22052 [2022-01-31 18:07:38,843 INFO L87 Difference]: Start difference. First operand 307 states and 308 transitions. Second operand has 149 states, 149 states have (on average 2.0201342281879193) internal successors, (301), 148 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 18:07:44,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:07:44,109 INFO L93 Difference]: Finished difference Result 320 states and 322 transitions. [2022-01-31 18:07:44,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2022-01-31 18:07:44,110 INFO L78 Accepts]: Start accepts. Automaton has has 149 states, 149 states have (on average 2.0201342281879193) internal successors, (301), 148 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 306 [2022-01-31 18:07:44,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:07:44,110 INFO L225 Difference]: With dead ends: 320 [2022-01-31 18:07:44,110 INFO L226 Difference]: Without dead ends: 310 [2022-01-31 18:07:44,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 293 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10730 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=32634, Invalid=54096, Unknown=0, NotChecked=0, Total=86730 [2022-01-31 18:07:44,116 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 303 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:07:44,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 47 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:07:44,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2022-01-31 18:07:44,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 309. [2022-01-31 18:07:44,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 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), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:07:44,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 310 transitions. [2022-01-31 18:07:44,318 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 310 transitions. Word has length 306 [2022-01-31 18:07:44,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:07:44,318 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 310 transitions. [2022-01-31 18:07:44,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 149 states, 149 states have (on average 2.0201342281879193) internal successors, (301), 148 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 18:07:44,319 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 310 transitions. [2022-01-31 18:07:44,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2022-01-31 18:07:44,320 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:07:44,320 INFO L514 BasicCegarLoop]: trace histogram [146, 146, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:07:44,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2022-01-31 18:07:44,320 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:07:44,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:07:44,320 INFO L85 PathProgramCache]: Analyzing trace with hash -186402794, now seen corresponding path program 145 times [2022-01-31 18:07:44,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:07:44,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1938542208] [2022-01-31 18:07:44,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:07:44,322 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:07:44,322 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:07:44,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:07:44,334 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:07:44,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:07:48,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:07:48,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:07:48,724 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 18:07:48,724 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:07:48,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1938542208] [2022-01-31 18:07:48,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1938542208] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:07:48,724 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:07:48,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [150] imperfect sequences [] total 150 [2022-01-31 18:07:48,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583233344] [2022-01-31 18:07:48,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:07:48,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 150 states [2022-01-31 18:07:48,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:07:48,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2022-01-31 18:07:48,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11028, Invalid=11322, Unknown=0, NotChecked=0, Total=22350 [2022-01-31 18:07:48,730 INFO L87 Difference]: Start difference. First operand 309 states and 310 transitions. Second operand has 150 states, 150 states have (on average 2.02) internal successors, (303), 149 states have internal predecessors, (303), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:07:54,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:07:54,567 INFO L93 Difference]: Finished difference Result 322 states and 324 transitions. [2022-01-31 18:07:54,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2022-01-31 18:07:54,567 INFO L78 Accepts]: Start accepts. Automaton has has 150 states, 150 states have (on average 2.02) internal successors, (303), 149 states have internal predecessors, (303), 2 states have call successors, (3), 3 states have 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 18:07:54,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:07:54,568 INFO L225 Difference]: With dead ends: 322 [2022-01-31 18:07:54,568 INFO L226 Difference]: Without dead ends: 312 [2022-01-31 18:07:54,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 295 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10877 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=33078, Invalid=54834, Unknown=0, NotChecked=0, Total=87912 [2022-01-31 18:07:54,574 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 305 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:07:54,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 47 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:07:54,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-01-31 18:07:54,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 311. [2022-01-31 18:07:54,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 306 states have (on average 1.0065359477124183) internal successors, (308), 306 states have internal predecessors, (308), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:07:54,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 312 transitions. [2022-01-31 18:07:54,785 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 312 transitions. Word has length 308 [2022-01-31 18:07:54,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:07:54,785 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 312 transitions. [2022-01-31 18:07:54,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 150 states, 150 states have (on average 2.02) internal successors, (303), 149 states have internal predecessors, (303), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:07:54,786 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 312 transitions. [2022-01-31 18:07:54,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2022-01-31 18:07:54,786 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:07:54,787 INFO L514 BasicCegarLoop]: trace histogram [147, 147, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:07:54,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2022-01-31 18:07:54,787 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:07:54,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:07:54,787 INFO L85 PathProgramCache]: Analyzing trace with hash -170037192, now seen corresponding path program 146 times [2022-01-31 18:07:54,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:07:54,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1045066743] [2022-01-31 18:07:54,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:07:54,789 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:07:54,789 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:07:54,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:07:54,802 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:07:54,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:08:02,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:08:02,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:08:02,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:08:02,879 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:08:02,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1045066743] [2022-01-31 18:08:02,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1045066743] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:08:02,879 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:08:02,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [151] imperfect sequences [] total 151 [2022-01-31 18:08:02,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276024862] [2022-01-31 18:08:02,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:08:02,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 151 states [2022-01-31 18:08:02,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:08:02,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2022-01-31 18:08:02,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11177, Invalid=11473, Unknown=0, NotChecked=0, Total=22650 [2022-01-31 18:08:02,883 INFO L87 Difference]: Start difference. First operand 311 states and 312 transitions. Second operand has 151 states, 151 states have (on average 2.019867549668874) internal successors, (305), 150 states have internal predecessors, (305), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:08:09,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:08:09,549 INFO L93 Difference]: Finished difference Result 324 states and 326 transitions. [2022-01-31 18:08:09,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2022-01-31 18:08:09,550 INFO L78 Accepts]: Start accepts. Automaton has has 151 states, 151 states have (on average 2.019867549668874) internal successors, (305), 150 states have internal predecessors, (305), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 310 [2022-01-31 18:08:09,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:08:09,551 INFO L225 Difference]: With dead ends: 324 [2022-01-31 18:08:09,551 INFO L226 Difference]: Without dead ends: 314 [2022-01-31 18:08:09,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 297 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11025 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=33525, Invalid=55577, Unknown=0, NotChecked=0, Total=89102 [2022-01-31 18:08:09,555 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 307 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:08:09,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [307 Valid, 42 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:08:09,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-01-31 18:08:09,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 313. [2022-01-31 18:08:09,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 308 states have (on average 1.0064935064935066) internal successors, (310), 308 states have internal predecessors, (310), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:08:09,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 314 transitions. [2022-01-31 18:08:09,723 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 314 transitions. Word has length 310 [2022-01-31 18:08:09,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:08:09,724 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 314 transitions. [2022-01-31 18:08:09,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 151 states, 151 states have (on average 2.019867549668874) internal successors, (305), 150 states have internal predecessors, (305), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:08:09,724 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 314 transitions. [2022-01-31 18:08:09,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2022-01-31 18:08:09,725 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:08:09,725 INFO L514 BasicCegarLoop]: trace histogram [148, 148, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:08:09,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2022-01-31 18:08:09,725 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:08:09,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:08:09,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1622562854, now seen corresponding path program 147 times [2022-01-31 18:08:09,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:08:09,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [905409341] [2022-01-31 18:08:09,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:08:09,727 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:08:09,727 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:08:09,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:08:09,742 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:08:09,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:08:14,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:08:14,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:08:14,651 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 18:08:14,651 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:08:14,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [905409341] [2022-01-31 18:08:14,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [905409341] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:08:14,651 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:08:14,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [152] imperfect sequences [] total 152 [2022-01-31 18:08:14,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183793962] [2022-01-31 18:08:14,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:08:14,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 152 states [2022-01-31 18:08:14,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:08:14,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2022-01-31 18:08:14,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11327, Invalid=11625, Unknown=0, NotChecked=0, Total=22952 [2022-01-31 18:08:14,656 INFO L87 Difference]: Start difference. First operand 313 states and 314 transitions. Second operand has 152 states, 152 states have (on average 2.0197368421052633) internal successors, (307), 151 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 18:08:21,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:08:21,434 INFO L93 Difference]: Finished difference Result 326 states and 328 transitions. [2022-01-31 18:08:21,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2022-01-31 18:08:21,434 INFO L78 Accepts]: Start accepts. Automaton has has 152 states, 152 states have (on average 2.0197368421052633) internal successors, (307), 151 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 312 [2022-01-31 18:08:21,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:08:21,435 INFO L225 Difference]: With dead ends: 326 [2022-01-31 18:08:21,435 INFO L226 Difference]: Without dead ends: 316 [2022-01-31 18:08:21,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 299 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11174 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=33975, Invalid=56325, Unknown=0, NotChecked=0, Total=90300 [2022-01-31 18:08:21,440 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 309 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:08:21,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 37 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:08:21,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-01-31 18:08:21,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 315. [2022-01-31 18:08:21,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 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), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:08:21,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 316 transitions. [2022-01-31 18:08:21,628 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 316 transitions. Word has length 312 [2022-01-31 18:08:21,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:08:21,629 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 316 transitions. [2022-01-31 18:08:21,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 152 states, 152 states have (on average 2.0197368421052633) internal successors, (307), 151 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 18:08:21,629 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 316 transitions. [2022-01-31 18:08:21,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2022-01-31 18:08:21,630 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:08:21,630 INFO L514 BasicCegarLoop]: trace histogram [149, 149, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:08:21,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2022-01-31 18:08:21,630 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:08:21,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:08:21,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1635352836, now seen corresponding path program 148 times [2022-01-31 18:08:21,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:08:21,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [559049234] [2022-01-31 18:08:21,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:08:21,631 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:08:21,631 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:08:21,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:08:21,644 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:08:21,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:08:26,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:08:26,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:08:26,325 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 18:08:26,325 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:08:26,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [559049234] [2022-01-31 18:08:26,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [559049234] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:08:26,325 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:08:26,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [153] imperfect sequences [] total 153 [2022-01-31 18:08:26,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958653217] [2022-01-31 18:08:26,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:08:26,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 153 states [2022-01-31 18:08:26,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:08:26,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 153 interpolants. [2022-01-31 18:08:26,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11478, Invalid=11778, Unknown=0, NotChecked=0, Total=23256 [2022-01-31 18:08:26,329 INFO L87 Difference]: Start difference. First operand 315 states and 316 transitions. Second operand has 153 states, 153 states have (on average 2.019607843137255) internal successors, (309), 152 states have internal predecessors, (309), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:08:31,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:08:31,935 INFO L93 Difference]: Finished difference Result 328 states and 330 transitions. [2022-01-31 18:08:31,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2022-01-31 18:08:31,935 INFO L78 Accepts]: Start accepts. Automaton has has 153 states, 153 states have (on average 2.019607843137255) internal successors, (309), 152 states have internal predecessors, (309), 2 states have call successors, (3), 3 states have 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 18:08:31,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:08:31,936 INFO L225 Difference]: With dead ends: 328 [2022-01-31 18:08:31,936 INFO L226 Difference]: Without dead ends: 318 [2022-01-31 18:08:31,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 301 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11324 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=34428, Invalid=57078, Unknown=0, NotChecked=0, Total=91506 [2022-01-31 18:08:31,940 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 311 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:08:31,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [311 Valid, 57 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:08:31,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-01-31 18:08:32,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 317. [2022-01-31 18:08:32,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 312 states have (on average 1.0064102564102564) internal successors, (314), 312 states have internal predecessors, (314), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:08:32,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 318 transitions. [2022-01-31 18:08:32,077 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 318 transitions. Word has length 314 [2022-01-31 18:08:32,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:08:32,077 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 318 transitions. [2022-01-31 18:08:32,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 153 states, 153 states have (on average 2.019607843137255) internal successors, (309), 152 states have internal predecessors, (309), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:08:32,077 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 318 transitions. [2022-01-31 18:08:32,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2022-01-31 18:08:32,078 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:08:32,078 INFO L514 BasicCegarLoop]: trace histogram [150, 150, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:08:32,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2022-01-31 18:08:32,078 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:08:32,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:08:32,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1041623650, now seen corresponding path program 149 times [2022-01-31 18:08:32,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:08:32,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1189683107] [2022-01-31 18:08:32,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:08:32,080 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:08:32,080 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:08:32,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:08:32,091 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:08:32,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:08:36,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:08:36,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:08:36,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:08:36,386 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:08:36,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1189683107] [2022-01-31 18:08:36,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1189683107] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:08:36,386 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:08:36,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [154] imperfect sequences [] total 154 [2022-01-31 18:08:36,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221123552] [2022-01-31 18:08:36,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:08:36,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 154 states [2022-01-31 18:08:36,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:08:36,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2022-01-31 18:08:36,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11630, Invalid=11932, Unknown=0, NotChecked=0, Total=23562 [2022-01-31 18:08:36,391 INFO L87 Difference]: Start difference. First operand 317 states and 318 transitions. Second operand has 154 states, 154 states have (on average 2.0194805194805197) internal successors, (311), 153 states have internal predecessors, (311), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:08:41,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:08:41,869 INFO L93 Difference]: Finished difference Result 330 states and 332 transitions. [2022-01-31 18:08:41,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2022-01-31 18:08:41,869 INFO L78 Accepts]: Start accepts. Automaton has has 154 states, 154 states have (on average 2.0194805194805197) internal successors, (311), 153 states have internal predecessors, (311), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 316 [2022-01-31 18:08:41,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:08:41,870 INFO L225 Difference]: With dead ends: 330 [2022-01-31 18:08:41,870 INFO L226 Difference]: Without dead ends: 320 [2022-01-31 18:08:41,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 303 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11475 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=34884, Invalid=57836, Unknown=0, NotChecked=0, Total=92720 [2022-01-31 18:08:41,874 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 313 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:08:41,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [313 Valid, 37 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:08:41,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-01-31 18:08:42,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 319. [2022-01-31 18:08:42,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 314 states have (on average 1.0063694267515924) internal successors, (316), 314 states have internal predecessors, (316), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:08:42,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 320 transitions. [2022-01-31 18:08:42,017 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 320 transitions. Word has length 316 [2022-01-31 18:08:42,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:08:42,018 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 320 transitions. [2022-01-31 18:08:42,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 154 states, 154 states have (on average 2.0194805194805197) internal successors, (311), 153 states have internal predecessors, (311), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:08:42,018 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 320 transitions. [2022-01-31 18:08:42,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2022-01-31 18:08:42,019 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:08:42,019 INFO L514 BasicCegarLoop]: trace histogram [151, 151, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:08:42,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2022-01-31 18:08:42,019 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:08:42,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:08:42,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1698526272, now seen corresponding path program 150 times [2022-01-31 18:08:42,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:08:42,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2023072164] [2022-01-31 18:08:42,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:08:42,020 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:08:42,020 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:08:42,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:08:42,031 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:08:42,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:08:46,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:08:46,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:08:46,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:08:46,761 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:08:46,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2023072164] [2022-01-31 18:08:46,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2023072164] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:08:46,761 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:08:46,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [155] imperfect sequences [] total 155 [2022-01-31 18:08:46,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24579432] [2022-01-31 18:08:46,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:08:46,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 155 states [2022-01-31 18:08:46,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:08:46,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 155 interpolants. [2022-01-31 18:08:46,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11783, Invalid=12087, Unknown=0, NotChecked=0, Total=23870 [2022-01-31 18:08:46,766 INFO L87 Difference]: Start difference. First operand 319 states and 320 transitions. Second operand has 155 states, 155 states have (on average 2.0193548387096776) internal successors, (313), 154 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 18:08:53,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:08:53,303 INFO L93 Difference]: Finished difference Result 332 states and 334 transitions. [2022-01-31 18:08:53,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2022-01-31 18:08:53,303 INFO L78 Accepts]: Start accepts. Automaton has has 155 states, 155 states have (on average 2.0193548387096776) internal successors, (313), 154 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 318 [2022-01-31 18:08:53,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:08:53,304 INFO L225 Difference]: With dead ends: 332 [2022-01-31 18:08:53,304 INFO L226 Difference]: Without dead ends: 322 [2022-01-31 18:08:53,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 305 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11627 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=35343, Invalid=58599, Unknown=0, NotChecked=0, Total=93942 [2022-01-31 18:08:53,308 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 315 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:08:53,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 52 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:08:53,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2022-01-31 18:08:53,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 321. [2022-01-31 18:08:53,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 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), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:08:53,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 322 transitions. [2022-01-31 18:08:53,458 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 322 transitions. Word has length 318 [2022-01-31 18:08:53,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:08:53,458 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 322 transitions. [2022-01-31 18:08:53,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 155 states, 155 states have (on average 2.0193548387096776) internal successors, (313), 154 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 18:08:53,458 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 322 transitions. [2022-01-31 18:08:53,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2022-01-31 18:08:53,459 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:08:53,459 INFO L514 BasicCegarLoop]: trace histogram [152, 152, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:08:53,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2022-01-31 18:08:53,459 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:08:53,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:08:53,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1621753502, now seen corresponding path program 151 times [2022-01-31 18:08:53,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:08:53,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1344010179] [2022-01-31 18:08:53,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:08:53,461 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:08:53,461 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:08:53,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:08:53,472 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:08:53,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:08:58,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:08:58,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:08:58,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:08:58,169 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:08:58,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1344010179] [2022-01-31 18:08:58,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1344010179] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:08:58,169 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:08:58,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [156] imperfect sequences [] total 156 [2022-01-31 18:08:58,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929214706] [2022-01-31 18:08:58,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:08:58,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 156 states [2022-01-31 18:08:58,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:08:58,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2022-01-31 18:08:58,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11937, Invalid=12243, Unknown=0, NotChecked=0, Total=24180 [2022-01-31 18:08:58,173 INFO L87 Difference]: Start difference. First operand 321 states and 322 transitions. Second operand has 156 states, 156 states have (on average 2.019230769230769) internal successors, (315), 155 states have internal predecessors, (315), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:09:04,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:09:04,588 INFO L93 Difference]: Finished difference Result 334 states and 336 transitions. [2022-01-31 18:09:04,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2022-01-31 18:09:04,588 INFO L78 Accepts]: Start accepts. Automaton has has 156 states, 156 states have (on average 2.019230769230769) internal successors, (315), 155 states have internal predecessors, (315), 2 states have call successors, (3), 3 states have 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 18:09:04,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:09:04,588 INFO L225 Difference]: With dead ends: 334 [2022-01-31 18:09:04,588 INFO L226 Difference]: Without dead ends: 324 [2022-01-31 18:09:04,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 307 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11780 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=35805, Invalid=59367, Unknown=0, NotChecked=0, Total=95172 [2022-01-31 18:09:04,592 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 317 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:09:04,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [317 Valid, 42 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:09:04,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-01-31 18:09:04,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 323. [2022-01-31 18:09:04,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 318 states have (on average 1.0062893081761006) internal successors, (320), 318 states have internal predecessors, (320), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:09:04,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 324 transitions. [2022-01-31 18:09:04,723 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 324 transitions. Word has length 320 [2022-01-31 18:09:04,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:09:04,724 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 324 transitions. [2022-01-31 18:09:04,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 156 states, 156 states have (on average 2.019230769230769) internal successors, (315), 155 states have internal predecessors, (315), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:09:04,724 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 324 transitions. [2022-01-31 18:09:04,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2022-01-31 18:09:04,725 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:09:04,725 INFO L514 BasicCegarLoop]: trace histogram [153, 153, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:09:04,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2022-01-31 18:09:04,725 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:09:04,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:09:04,725 INFO L85 PathProgramCache]: Analyzing trace with hash -857565564, now seen corresponding path program 152 times [2022-01-31 18:09:04,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:09:04,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1186265824] [2022-01-31 18:09:04,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:09:04,726 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:09:04,726 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:09:04,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:09:04,737 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:09:04,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:10,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:09:10,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:10,285 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 18:09:10,285 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:09:10,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1186265824] [2022-01-31 18:09:10,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1186265824] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:09:10,285 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:09:10,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [157] imperfect sequences [] total 157 [2022-01-31 18:09:10,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160543436] [2022-01-31 18:09:10,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:09:10,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 157 states [2022-01-31 18:09:10,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:09:10,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 157 interpolants. [2022-01-31 18:09:10,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12092, Invalid=12400, Unknown=0, NotChecked=0, Total=24492 [2022-01-31 18:09:10,288 INFO L87 Difference]: Start difference. First operand 323 states and 324 transitions. Second operand has 157 states, 157 states have (on average 2.0191082802547773) internal successors, (317), 156 states have internal predecessors, (317), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:09:17,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:09:17,321 INFO L93 Difference]: Finished difference Result 336 states and 338 transitions. [2022-01-31 18:09:17,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2022-01-31 18:09:17,322 INFO L78 Accepts]: Start accepts. Automaton has has 157 states, 157 states have (on average 2.0191082802547773) internal successors, (317), 156 states have internal predecessors, (317), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 322 [2022-01-31 18:09:17,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:09:17,323 INFO L225 Difference]: With dead ends: 336 [2022-01-31 18:09:17,323 INFO L226 Difference]: Without dead ends: 326 [2022-01-31 18:09:17,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 309 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11934 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=36270, Invalid=60140, Unknown=0, NotChecked=0, Total=96410 [2022-01-31 18:09:17,326 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 319 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:09:17,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 57 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:09:17,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-01-31 18:09:17,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 325. [2022-01-31 18:09:17,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 320 states have (on average 1.00625) internal successors, (322), 320 states have internal predecessors, (322), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:09:17,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 326 transitions. [2022-01-31 18:09:17,461 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 326 transitions. Word has length 322 [2022-01-31 18:09:17,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:09:17,461 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 326 transitions. [2022-01-31 18:09:17,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 157 states, 157 states have (on average 2.0191082802547773) internal successors, (317), 156 states have internal predecessors, (317), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:09:17,462 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 326 transitions. [2022-01-31 18:09:17,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2022-01-31 18:09:17,462 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:09:17,463 INFO L514 BasicCegarLoop]: trace histogram [154, 154, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:09:17,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2022-01-31 18:09:17,463 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:09:17,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:09:17,463 INFO L85 PathProgramCache]: Analyzing trace with hash -912364762, now seen corresponding path program 153 times [2022-01-31 18:09:17,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:09:17,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1124878403] [2022-01-31 18:09:17,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:09:17,464 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:09:17,464 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:09:17,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:09:17,476 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:09:17,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:22,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:09:22,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:22,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:09:22,437 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:09:22,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1124878403] [2022-01-31 18:09:22,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1124878403] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:09:22,438 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:09:22,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [158] imperfect sequences [] total 158 [2022-01-31 18:09:22,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239598540] [2022-01-31 18:09:22,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:09:22,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 158 states [2022-01-31 18:09:22,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:09:22,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2022-01-31 18:09:22,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12248, Invalid=12558, Unknown=0, NotChecked=0, Total=24806 [2022-01-31 18:09:22,443 INFO L87 Difference]: Start difference. First operand 325 states and 326 transitions. Second operand has 158 states, 158 states have (on average 2.018987341772152) internal successors, (319), 157 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 18:09:28,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:09:28,485 INFO L93 Difference]: Finished difference Result 338 states and 340 transitions. [2022-01-31 18:09:28,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2022-01-31 18:09:28,485 INFO L78 Accepts]: Start accepts. Automaton has has 158 states, 158 states have (on average 2.018987341772152) internal successors, (319), 157 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 324 [2022-01-31 18:09:28,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:09:28,486 INFO L225 Difference]: With dead ends: 338 [2022-01-31 18:09:28,486 INFO L226 Difference]: Without dead ends: 328 [2022-01-31 18:09:28,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 311 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12089 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=36738, Invalid=60918, Unknown=0, NotChecked=0, Total=97656 [2022-01-31 18:09:28,489 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 321 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:09:28,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 57 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:09:28,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-01-31 18:09:28,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 327. [2022-01-31 18:09:28,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 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), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:09:28,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 328 transitions. [2022-01-31 18:09:28,631 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 328 transitions. Word has length 324 [2022-01-31 18:09:28,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:09:28,632 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 328 transitions. [2022-01-31 18:09:28,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 158 states, 158 states have (on average 2.018987341772152) internal successors, (319), 157 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 18:09:28,632 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 328 transitions. [2022-01-31 18:09:28,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2022-01-31 18:09:28,633 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:09:28,633 INFO L514 BasicCegarLoop]: trace histogram [155, 155, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:09:28,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2022-01-31 18:09:28,633 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:09:28,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:09:28,633 INFO L85 PathProgramCache]: Analyzing trace with hash -2034786488, now seen corresponding path program 154 times [2022-01-31 18:09:28,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:09:28,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [18298660] [2022-01-31 18:09:28,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:09:28,634 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:09:28,634 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:09:28,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:09:28,647 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:09:28,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:34,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:09:34,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:34,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:09:34,184 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:09:34,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [18298660] [2022-01-31 18:09:34,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [18298660] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:09:34,184 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:09:34,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [159] imperfect sequences [] total 159 [2022-01-31 18:09:34,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920312703] [2022-01-31 18:09:34,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:09:34,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 159 states [2022-01-31 18:09:34,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:09:34,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 159 interpolants. [2022-01-31 18:09:34,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12405, Invalid=12717, Unknown=0, NotChecked=0, Total=25122 [2022-01-31 18:09:34,189 INFO L87 Difference]: Start difference. First operand 327 states and 328 transitions. Second operand has 159 states, 159 states have (on average 2.018867924528302) internal successors, (321), 158 states have internal predecessors, (321), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:09:39,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:09:39,914 INFO L93 Difference]: Finished difference Result 340 states and 342 transitions. [2022-01-31 18:09:39,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2022-01-31 18:09:39,914 INFO L78 Accepts]: Start accepts. Automaton has has 159 states, 159 states have (on average 2.018867924528302) internal successors, (321), 158 states have internal predecessors, (321), 2 states have call successors, (3), 3 states have 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 18:09:39,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:09:39,915 INFO L225 Difference]: With dead ends: 340 [2022-01-31 18:09:39,915 INFO L226 Difference]: Without dead ends: 330 [2022-01-31 18:09:39,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 313 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12245 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=37209, Invalid=61701, Unknown=0, NotChecked=0, Total=98910 [2022-01-31 18:09:39,920 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 323 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:09:39,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 47 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:09:39,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-01-31 18:09:40,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 329. [2022-01-31 18:09:40,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 324 states have (on average 1.0061728395061729) internal successors, (326), 324 states have internal predecessors, (326), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:09:40,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 330 transitions. [2022-01-31 18:09:40,073 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 330 transitions. Word has length 326 [2022-01-31 18:09:40,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:09:40,074 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 330 transitions. [2022-01-31 18:09:40,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 159 states, 159 states have (on average 2.018867924528302) internal successors, (321), 158 states have internal predecessors, (321), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:09:40,074 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 330 transitions. [2022-01-31 18:09:40,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2022-01-31 18:09:40,075 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:09:40,075 INFO L514 BasicCegarLoop]: trace histogram [156, 156, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:09:40,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2022-01-31 18:09:40,075 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:09:40,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:09:40,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1649693418, now seen corresponding path program 155 times [2022-01-31 18:09:40,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:09:40,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1773866188] [2022-01-31 18:09:40,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:09:40,076 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:09:40,076 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:09:40,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:09:40,089 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:09:40,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:45,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:09:45,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:45,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:09:45,096 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:09:45,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1773866188] [2022-01-31 18:09:45,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1773866188] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:09:45,097 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:09:45,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [160] imperfect sequences [] total 160 [2022-01-31 18:09:45,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767110185] [2022-01-31 18:09:45,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:09:45,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 160 states [2022-01-31 18:09:45,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:09:45,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2022-01-31 18:09:45,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12563, Invalid=12877, Unknown=0, NotChecked=0, Total=25440 [2022-01-31 18:09:45,101 INFO L87 Difference]: Start difference. First operand 329 states and 330 transitions. Second operand has 160 states, 160 states have (on average 2.01875) internal successors, (323), 159 states have internal predecessors, (323), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:09:51,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:09:51,662 INFO L93 Difference]: Finished difference Result 342 states and 344 transitions. [2022-01-31 18:09:51,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2022-01-31 18:09:51,662 INFO L78 Accepts]: Start accepts. Automaton has has 160 states, 160 states have (on average 2.01875) internal successors, (323), 159 states have internal predecessors, (323), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 328 [2022-01-31 18:09:51,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:09:51,663 INFO L225 Difference]: With dead ends: 342 [2022-01-31 18:09:51,663 INFO L226 Difference]: Without dead ends: 332 [2022-01-31 18:09:51,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 315 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12402 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=37683, Invalid=62489, Unknown=0, NotChecked=0, Total=100172 [2022-01-31 18:09:51,667 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 325 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:09:51,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 47 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:09:51,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-01-31 18:09:51,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 331. [2022-01-31 18:09:51,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 326 states have (on average 1.0061349693251533) internal successors, (328), 326 states have internal predecessors, (328), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:09:51,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 332 transitions. [2022-01-31 18:09:51,822 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 332 transitions. Word has length 328 [2022-01-31 18:09:51,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:09:51,822 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 332 transitions. [2022-01-31 18:09:51,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 160 states, 160 states have (on average 2.01875) internal successors, (323), 159 states have internal predecessors, (323), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:09:51,822 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 332 transitions. [2022-01-31 18:09:51,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2022-01-31 18:09:51,823 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:09:51,823 INFO L514 BasicCegarLoop]: trace histogram [157, 157, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:09:51,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2022-01-31 18:09:51,823 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:09:51,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:09:51,824 INFO L85 PathProgramCache]: Analyzing trace with hash -913136116, now seen corresponding path program 156 times [2022-01-31 18:09:51,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:09:51,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1112030376] [2022-01-31 18:09:51,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:09:51,825 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:09:51,825 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:09:51,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:09:51,839 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:09:51,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:56,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:09:56,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:56,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:09:56,219 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:09:56,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1112030376] [2022-01-31 18:09:56,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1112030376] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:09:56,219 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:09:56,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [161] imperfect sequences [] total 161 [2022-01-31 18:09:56,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131148766] [2022-01-31 18:09:56,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:09:56,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 161 states [2022-01-31 18:09:56,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:09:56,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 161 interpolants. [2022-01-31 18:09:56,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12722, Invalid=13038, Unknown=0, NotChecked=0, Total=25760 [2022-01-31 18:09:56,223 INFO L87 Difference]: Start difference. First operand 331 states and 332 transitions. Second operand has 161 states, 161 states have (on average 2.018633540372671) internal successors, (325), 160 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 18:10:02,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:10:02,720 INFO L93 Difference]: Finished difference Result 344 states and 346 transitions. [2022-01-31 18:10:02,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2022-01-31 18:10:02,720 INFO L78 Accepts]: Start accepts. Automaton has has 161 states, 161 states have (on average 2.018633540372671) internal successors, (325), 160 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 330 [2022-01-31 18:10:02,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:10:02,721 INFO L225 Difference]: With dead ends: 344 [2022-01-31 18:10:02,721 INFO L226 Difference]: Without dead ends: 334 [2022-01-31 18:10:02,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 317 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12560 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=38160, Invalid=63282, Unknown=0, NotChecked=0, Total=101442 [2022-01-31 18:10:02,726 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 327 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:10:02,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [327 Valid, 47 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:10:02,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2022-01-31 18:10:02,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 333. [2022-01-31 18:10:02,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 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), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:10:02,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 334 transitions. [2022-01-31 18:10:02,884 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 334 transitions. Word has length 330 [2022-01-31 18:10:02,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:10:02,884 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 334 transitions. [2022-01-31 18:10:02,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 161 states, 161 states have (on average 2.018633540372671) internal successors, (325), 160 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 18:10:02,884 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 334 transitions. [2022-01-31 18:10:02,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2022-01-31 18:10:02,885 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:10:02,885 INFO L514 BasicCegarLoop]: trace histogram [158, 158, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:10:02,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2022-01-31 18:10:02,885 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:10:02,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:10:02,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1518909614, now seen corresponding path program 157 times [2022-01-31 18:10:02,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:10:02,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [457756194] [2022-01-31 18:10:02,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:10:02,887 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:10:02,887 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:10:02,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:10:02,901 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:10:02,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:10:07,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:10:07,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:10:07,431 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 18:10:07,431 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:10:07,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [457756194] [2022-01-31 18:10:07,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [457756194] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:10:07,431 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:10:07,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [162] imperfect sequences [] total 162 [2022-01-31 18:10:07,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958743586] [2022-01-31 18:10:07,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:10:07,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 162 states [2022-01-31 18:10:07,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:10:07,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2022-01-31 18:10:07,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12882, Invalid=13200, Unknown=0, NotChecked=0, Total=26082 [2022-01-31 18:10:07,436 INFO L87 Difference]: Start difference. First operand 333 states and 334 transitions. Second operand has 162 states, 162 states have (on average 2.0185185185185186) internal successors, (327), 161 states have internal predecessors, (327), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:10:13,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:10:13,933 INFO L93 Difference]: Finished difference Result 346 states and 348 transitions. [2022-01-31 18:10:13,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2022-01-31 18:10:13,934 INFO L78 Accepts]: Start accepts. Automaton has has 162 states, 162 states have (on average 2.0185185185185186) internal successors, (327), 161 states have internal predecessors, (327), 2 states have call successors, (3), 3 states have 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 18:10:13,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:10:13,934 INFO L225 Difference]: With dead ends: 346 [2022-01-31 18:10:13,934 INFO L226 Difference]: Without dead ends: 336 [2022-01-31 18:10:13,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 319 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12719 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=38640, Invalid=64080, Unknown=0, NotChecked=0, Total=102720 [2022-01-31 18:10:13,939 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 329 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:10:13,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [329 Valid, 47 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:10:13,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2022-01-31 18:10:14,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 335. [2022-01-31 18:10:14,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 330 states have (on average 1.006060606060606) internal successors, (332), 330 states have internal predecessors, (332), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:10:14,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 336 transitions. [2022-01-31 18:10:14,099 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 336 transitions. Word has length 332 [2022-01-31 18:10:14,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:10:14,099 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 336 transitions. [2022-01-31 18:10:14,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 162 states, 162 states have (on average 2.0185185185185186) internal successors, (327), 161 states have internal predecessors, (327), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:10:14,100 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 336 transitions. [2022-01-31 18:10:14,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2022-01-31 18:10:14,100 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:10:14,100 INFO L514 BasicCegarLoop]: trace histogram [159, 159, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:10:14,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2022-01-31 18:10:14,101 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:10:14,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:10:14,101 INFO L85 PathProgramCache]: Analyzing trace with hash -2042320176, now seen corresponding path program 158 times [2022-01-31 18:10:14,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:10:14,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [594282048] [2022-01-31 18:10:14,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:10:14,102 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:10:14,102 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:10:14,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:10:14,116 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:10:14,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:10:19,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:10:19,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:10:19,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:10:19,614 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:10:19,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [594282048] [2022-01-31 18:10:19,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [594282048] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:10:19,614 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:10:19,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [163] imperfect sequences [] total 163 [2022-01-31 18:10:19,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766154156] [2022-01-31 18:10:19,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:10:19,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 163 states [2022-01-31 18:10:19,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:10:19,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 163 interpolants. [2022-01-31 18:10:19,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13043, Invalid=13363, Unknown=0, NotChecked=0, Total=26406 [2022-01-31 18:10:19,620 INFO L87 Difference]: Start difference. First operand 335 states and 336 transitions. Second operand has 163 states, 163 states have (on average 2.01840490797546) internal successors, (329), 162 states have internal predecessors, (329), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:10:28,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:10:28,696 INFO L93 Difference]: Finished difference Result 348 states and 350 transitions. [2022-01-31 18:10:28,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2022-01-31 18:10:28,696 INFO L78 Accepts]: Start accepts. Automaton has has 163 states, 163 states have (on average 2.01840490797546) internal successors, (329), 162 states have internal predecessors, (329), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 334 [2022-01-31 18:10:28,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:10:28,697 INFO L225 Difference]: With dead ends: 348 [2022-01-31 18:10:28,697 INFO L226 Difference]: Without dead ends: 338 [2022-01-31 18:10:28,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 321 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12879 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=39123, Invalid=64883, Unknown=0, NotChecked=0, Total=104006 [2022-01-31 18:10:28,701 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 331 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:10:28,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 42 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:10:28,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-01-31 18:10:28,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 337. [2022-01-31 18:10:28,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 332 states have (on average 1.0060240963855422) internal successors, (334), 332 states have internal predecessors, (334), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:10:28,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 338 transitions. [2022-01-31 18:10:28,848 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 338 transitions. Word has length 334 [2022-01-31 18:10:28,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:10:28,848 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 338 transitions. [2022-01-31 18:10:28,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 163 states, 163 states have (on average 2.01840490797546) internal successors, (329), 162 states have internal predecessors, (329), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:10:28,848 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 338 transitions. [2022-01-31 18:10:28,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2022-01-31 18:10:28,849 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:10:28,849 INFO L514 BasicCegarLoop]: trace histogram [160, 160, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:10:28,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2022-01-31 18:10:28,849 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:10:28,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:10:28,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1295213454, now seen corresponding path program 159 times [2022-01-31 18:10:28,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:10:28,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1448632690] [2022-01-31 18:10:28,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:10:28,851 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:10:28,851 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:10:28,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:10:28,868 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:10:28,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:10:36,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:10:36,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:10:36,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:10:36,926 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:10:36,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1448632690] [2022-01-31 18:10:36,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1448632690] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:10:36,926 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:10:36,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [164] imperfect sequences [] total 164 [2022-01-31 18:10:36,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36641451] [2022-01-31 18:10:36,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:10:36,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 164 states [2022-01-31 18:10:36,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:10:36,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2022-01-31 18:10:36,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13205, Invalid=13527, Unknown=0, NotChecked=0, Total=26732 [2022-01-31 18:10:36,933 INFO L87 Difference]: Start difference. First operand 337 states and 338 transitions. Second operand has 164 states, 164 states have (on average 2.018292682926829) internal successors, (331), 163 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 18:10:46,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:10:46,667 INFO L93 Difference]: Finished difference Result 350 states and 352 transitions. [2022-01-31 18:10:46,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2022-01-31 18:10:46,668 INFO L78 Accepts]: Start accepts. Automaton has has 164 states, 164 states have (on average 2.018292682926829) internal successors, (331), 163 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 336 [2022-01-31 18:10:46,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:10:46,669 INFO L225 Difference]: With dead ends: 350 [2022-01-31 18:10:46,669 INFO L226 Difference]: Without dead ends: 340 [2022-01-31 18:10:46,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 323 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13040 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=39609, Invalid=65691, Unknown=0, NotChecked=0, Total=105300 [2022-01-31 18:10:46,675 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 333 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:10:46,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [333 Valid, 52 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:10:46,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2022-01-31 18:10:46,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 339. [2022-01-31 18:10:46,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 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), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:10:46,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 340 transitions. [2022-01-31 18:10:46,824 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 340 transitions. Word has length 336 [2022-01-31 18:10:46,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:10:46,824 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 340 transitions. [2022-01-31 18:10:46,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 164 states, 164 states have (on average 2.018292682926829) internal successors, (331), 163 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 18:10:46,824 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 340 transitions. [2022-01-31 18:10:46,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2022-01-31 18:10:46,825 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:10:46,825 INFO L514 BasicCegarLoop]: trace histogram [161, 161, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:10:46,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2022-01-31 18:10:46,826 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:10:46,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:10:46,826 INFO L85 PathProgramCache]: Analyzing trace with hash -585192044, now seen corresponding path program 160 times [2022-01-31 18:10:46,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:10:46,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [301587341] [2022-01-31 18:10:46,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:10:46,840 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:10:46,840 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:10:46,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:10:46,856 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:10:46,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:10:55,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:10:55,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:10:55,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:10:55,033 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:10:55,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [301587341] [2022-01-31 18:10:55,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [301587341] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:10:55,033 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:10:55,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [165] imperfect sequences [] total 165 [2022-01-31 18:10:55,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112463139] [2022-01-31 18:10:55,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:10:55,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 165 states [2022-01-31 18:10:55,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:10:55,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 165 interpolants. [2022-01-31 18:10:55,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13368, Invalid=13692, Unknown=0, NotChecked=0, Total=27060 [2022-01-31 18:10:55,036 INFO L87 Difference]: Start difference. First operand 339 states and 340 transitions. Second operand has 165 states, 165 states have (on average 2.018181818181818) internal successors, (333), 164 states have internal predecessors, (333), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:11:04,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:11:04,696 INFO L93 Difference]: Finished difference Result 352 states and 354 transitions. [2022-01-31 18:11:04,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 165 states. [2022-01-31 18:11:04,696 INFO L78 Accepts]: Start accepts. Automaton has has 165 states, 165 states have (on average 2.018181818181818) internal successors, (333), 164 states have internal predecessors, (333), 2 states have call successors, (3), 3 states have 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 18:11:04,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:11:04,697 INFO L225 Difference]: With dead ends: 352 [2022-01-31 18:11:04,697 INFO L226 Difference]: Without dead ends: 342 [2022-01-31 18:11:04,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 325 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13202 ImplicationChecksByTransitivity, 16.8s TimeCoverageRelationStatistics Valid=40098, Invalid=66504, Unknown=0, NotChecked=0, Total=106602 [2022-01-31 18:11:04,702 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 335 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:11:04,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 52 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:11:04,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2022-01-31 18:11:04,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 341. [2022-01-31 18:11:04,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 336 states have (on average 1.005952380952381) internal successors, (338), 336 states have internal predecessors, (338), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:11:04,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 342 transitions. [2022-01-31 18:11:04,853 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 342 transitions. Word has length 338 [2022-01-31 18:11:04,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:11:04,853 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 342 transitions. [2022-01-31 18:11:04,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 165 states, 165 states have (on average 2.018181818181818) internal successors, (333), 164 states have internal predecessors, (333), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:11:04,854 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 342 transitions. [2022-01-31 18:11:04,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2022-01-31 18:11:04,855 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:11:04,855 INFO L514 BasicCegarLoop]: trace histogram [162, 162, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:11:04,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2022-01-31 18:11:04,855 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:11:04,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:11:04,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1154417098, now seen corresponding path program 161 times [2022-01-31 18:11:04,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:11:04,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1227577713] [2022-01-31 18:11:04,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:11:04,857 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:11:04,857 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:11:04,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:11:04,873 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:11:05,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:11:12,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:11:12,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:11:12,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:11:12,361 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:11:12,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1227577713] [2022-01-31 18:11:12,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1227577713] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:11:12,361 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:11:12,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [166] imperfect sequences [] total 166 [2022-01-31 18:11:12,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633421898] [2022-01-31 18:11:12,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:11:12,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 166 states [2022-01-31 18:11:12,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:11:12,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 166 interpolants. [2022-01-31 18:11:12,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13532, Invalid=13858, Unknown=0, NotChecked=0, Total=27390 [2022-01-31 18:11:12,366 INFO L87 Difference]: Start difference. First operand 341 states and 342 transitions. Second operand has 166 states, 166 states have (on average 2.0180722891566263) internal successors, (335), 165 states have internal predecessors, (335), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:11:20,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:11:20,595 INFO L93 Difference]: Finished difference Result 354 states and 356 transitions. [2022-01-31 18:11:20,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2022-01-31 18:11:20,596 INFO L78 Accepts]: Start accepts. Automaton has has 166 states, 166 states have (on average 2.0180722891566263) internal successors, (335), 165 states have internal predecessors, (335), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 340 [2022-01-31 18:11:20,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:11:20,597 INFO L225 Difference]: With dead ends: 354 [2022-01-31 18:11:20,597 INFO L226 Difference]: Without dead ends: 344 [2022-01-31 18:11:20,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 327 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13365 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=40590, Invalid=67322, Unknown=0, NotChecked=0, Total=107912 [2022-01-31 18:11:20,603 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 337 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:11:20,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [337 Valid, 37 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:11:20,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-01-31 18:11:20,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 343. [2022-01-31 18:11:20,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 338 states have (on average 1.0059171597633136) internal successors, (340), 338 states have internal predecessors, (340), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:11:20,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 344 transitions. [2022-01-31 18:11:20,776 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 344 transitions. Word has length 340 [2022-01-31 18:11:20,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:11:20,777 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 344 transitions. [2022-01-31 18:11:20,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 166 states, 166 states have (on average 2.0180722891566263) internal successors, (335), 165 states have internal predecessors, (335), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:11:20,777 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 344 transitions. [2022-01-31 18:11:20,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2022-01-31 18:11:20,778 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:11:20,778 INFO L514 BasicCegarLoop]: trace histogram [163, 163, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:11:20,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2022-01-31 18:11:20,778 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:11:20,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:11:20,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1576119896, now seen corresponding path program 162 times [2022-01-31 18:11:20,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:11:20,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [538342319] [2022-01-31 18:11:20,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:11:20,779 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:11:20,780 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:11:20,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:11:20,795 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:11:20,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:11:27,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:11:27,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:11:27,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:11:27,373 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:11:27,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [538342319] [2022-01-31 18:11:27,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [538342319] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:11:27,374 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:11:27,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [167] imperfect sequences [] total 167 [2022-01-31 18:11:27,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355939431] [2022-01-31 18:11:27,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:11:27,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 167 states [2022-01-31 18:11:27,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:11:27,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 167 interpolants. [2022-01-31 18:11:27,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13697, Invalid=14025, Unknown=0, NotChecked=0, Total=27722 [2022-01-31 18:11:27,380 INFO L87 Difference]: Start difference. First operand 343 states and 344 transitions. Second operand has 167 states, 167 states have (on average 2.0179640718562872) internal successors, (337), 166 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 18:11:37,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:11:37,001 INFO L93 Difference]: Finished difference Result 356 states and 358 transitions. [2022-01-31 18:11:37,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2022-01-31 18:11:37,001 INFO L78 Accepts]: Start accepts. Automaton has has 167 states, 167 states have (on average 2.0179640718562872) internal successors, (337), 166 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 342 [2022-01-31 18:11:37,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:11:37,002 INFO L225 Difference]: With dead ends: 356 [2022-01-31 18:11:37,002 INFO L226 Difference]: Without dead ends: 346 [2022-01-31 18:11:37,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 329 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13529 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=41085, Invalid=68145, Unknown=0, NotChecked=0, Total=109230 [2022-01-31 18:11:37,005 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 339 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:11:37,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 57 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:11:37,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2022-01-31 18:11:37,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 345. [2022-01-31 18:11:37,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 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), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:11:37,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 346 transitions. [2022-01-31 18:11:37,156 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 346 transitions. Word has length 342 [2022-01-31 18:11:37,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:11:37,156 INFO L470 AbstractCegarLoop]: Abstraction has 345 states and 346 transitions. [2022-01-31 18:11:37,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 167 states, 167 states have (on average 2.0179640718562872) internal successors, (337), 166 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 18:11:37,157 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 346 transitions. [2022-01-31 18:11:37,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2022-01-31 18:11:37,158 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:11:37,158 INFO L514 BasicCegarLoop]: trace histogram [164, 164, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:11:37,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2022-01-31 18:11:37,158 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:11:37,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:11:37,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1397153274, now seen corresponding path program 163 times [2022-01-31 18:11:37,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:11:37,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2000116409] [2022-01-31 18:11:37,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:11:37,159 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:11:37,159 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:11:37,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:11:37,172 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:11:37,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:11:42,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:11:42,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:11:42,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:11:42,510 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:11:42,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2000116409] [2022-01-31 18:11:42,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2000116409] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:11:42,510 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:11:42,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [168] imperfect sequences [] total 168 [2022-01-31 18:11:42,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030207837] [2022-01-31 18:11:42,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:11:42,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 168 states [2022-01-31 18:11:42,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:11:42,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 168 interpolants. [2022-01-31 18:11:42,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13863, Invalid=14193, Unknown=0, NotChecked=0, Total=28056 [2022-01-31 18:11:42,517 INFO L87 Difference]: Start difference. First operand 345 states and 346 transitions. Second operand has 168 states, 168 states have (on average 2.017857142857143) internal successors, (339), 167 states have internal predecessors, (339), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:11:50,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:11:50,529 INFO L93 Difference]: Finished difference Result 358 states and 360 transitions. [2022-01-31 18:11:50,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2022-01-31 18:11:50,529 INFO L78 Accepts]: Start accepts. Automaton has has 168 states, 168 states have (on average 2.017857142857143) internal successors, (339), 167 states have internal predecessors, (339), 2 states have call successors, (3), 3 states have 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 18:11:50,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:11:50,530 INFO L225 Difference]: With dead ends: 358 [2022-01-31 18:11:50,530 INFO L226 Difference]: Without dead ends: 348 [2022-01-31 18:11:50,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 331 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13694 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=41583, Invalid=68973, Unknown=0, NotChecked=0, Total=110556 [2022-01-31 18:11:50,534 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 341 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:11:50,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 47 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:11:50,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-01-31 18:11:50,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 347. [2022-01-31 18:11:50,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 342 states have (on average 1.0058479532163742) internal successors, (344), 342 states have internal predecessors, (344), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:11:50,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 348 transitions. [2022-01-31 18:11:50,689 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 348 transitions. Word has length 344 [2022-01-31 18:11:50,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:11:50,689 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 348 transitions. [2022-01-31 18:11:50,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 168 states, 168 states have (on average 2.017857142857143) internal successors, (339), 167 states have internal predecessors, (339), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:11:50,689 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 348 transitions. [2022-01-31 18:11:50,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2022-01-31 18:11:50,690 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:11:50,690 INFO L514 BasicCegarLoop]: trace histogram [165, 165, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:11:50,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2022-01-31 18:11:50,691 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:11:50,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:11:50,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1208921372, now seen corresponding path program 164 times [2022-01-31 18:11:50,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:11:50,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2032204033] [2022-01-31 18:11:50,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:11:50,692 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:11:50,692 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:11:50,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:11:50,707 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:11:50,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:11:58,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:11:58,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:11:58,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:11:58,309 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:11:58,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2032204033] [2022-01-31 18:11:58,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2032204033] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:11:58,309 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:11:58,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [169] imperfect sequences [] total 169 [2022-01-31 18:11:58,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5297057] [2022-01-31 18:11:58,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:11:58,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 169 states [2022-01-31 18:11:58,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:11:58,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 169 interpolants. [2022-01-31 18:11:58,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14030, Invalid=14362, Unknown=0, NotChecked=0, Total=28392 [2022-01-31 18:11:58,316 INFO L87 Difference]: Start difference. First operand 347 states and 348 transitions. Second operand has 169 states, 169 states have (on average 2.0177514792899407) internal successors, (341), 168 states have internal predecessors, (341), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:12:05,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:05,806 INFO L93 Difference]: Finished difference Result 360 states and 362 transitions. [2022-01-31 18:12:05,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2022-01-31 18:12:05,806 INFO L78 Accepts]: Start accepts. Automaton has has 169 states, 169 states have (on average 2.0177514792899407) internal successors, (341), 168 states have internal predecessors, (341), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 346 [2022-01-31 18:12:05,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:05,807 INFO L225 Difference]: With dead ends: 360 [2022-01-31 18:12:05,807 INFO L226 Difference]: Without dead ends: 350 [2022-01-31 18:12:05,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 333 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13860 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=42084, Invalid=69806, Unknown=0, NotChecked=0, Total=111890 [2022-01-31 18:12:05,812 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 343 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:05,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 47 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:12:05,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-01-31 18:12:06,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 349. [2022-01-31 18:12:06,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 344 states have (on average 1.005813953488372) internal successors, (346), 344 states have internal predecessors, (346), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:12:06,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 350 transitions. [2022-01-31 18:12:06,029 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 350 transitions. Word has length 346 [2022-01-31 18:12:06,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:06,029 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 350 transitions. [2022-01-31 18:12:06,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 169 states, 169 states have (on average 2.0177514792899407) internal successors, (341), 168 states have internal predecessors, (341), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:12:06,029 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 350 transitions. [2022-01-31 18:12:06,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2022-01-31 18:12:06,030 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:06,030 INFO L514 BasicCegarLoop]: trace histogram [166, 166, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:06,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2022-01-31 18:12:06,031 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:06,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:06,031 INFO L85 PathProgramCache]: Analyzing trace with hash 706689982, now seen corresponding path program 165 times [2022-01-31 18:12:06,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:06,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [885705056] [2022-01-31 18:12:06,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:06,033 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:06,033 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:06,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:06,050 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:06,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:11,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:11,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:11,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:12:11,625 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:11,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [885705056] [2022-01-31 18:12:11,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [885705056] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:11,626 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:11,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [170] imperfect sequences [] total 170 [2022-01-31 18:12:11,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635614594] [2022-01-31 18:12:11,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:11,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 170 states [2022-01-31 18:12:11,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:11,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 170 interpolants. [2022-01-31 18:12:11,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14198, Invalid=14532, Unknown=0, NotChecked=0, Total=28730 [2022-01-31 18:12:11,631 INFO L87 Difference]: Start difference. First operand 349 states and 350 transitions. Second operand has 170 states, 170 states have (on average 2.0176470588235293) internal successors, (343), 169 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 18:12:19,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:19,368 INFO L93 Difference]: Finished difference Result 362 states and 364 transitions. [2022-01-31 18:12:19,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 170 states. [2022-01-31 18:12:19,369 INFO L78 Accepts]: Start accepts. Automaton has has 170 states, 170 states have (on average 2.0176470588235293) internal successors, (343), 169 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 348 [2022-01-31 18:12:19,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:19,369 INFO L225 Difference]: With dead ends: 362 [2022-01-31 18:12:19,369 INFO L226 Difference]: Without dead ends: 352 [2022-01-31 18:12:19,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 335 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14027 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=42588, Invalid=70644, Unknown=0, NotChecked=0, Total=113232 [2022-01-31 18:12:19,373 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 345 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:19,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [345 Valid, 52 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:12:19,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2022-01-31 18:12:19,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 351. [2022-01-31 18:12:19,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 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), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:12:19,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 352 transitions. [2022-01-31 18:12:19,532 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 352 transitions. Word has length 348 [2022-01-31 18:12:19,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:19,533 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 352 transitions. [2022-01-31 18:12:19,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 170 states, 170 states have (on average 2.0176470588235293) internal successors, (343), 169 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 18:12:19,533 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 352 transitions. [2022-01-31 18:12:19,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2022-01-31 18:12:19,534 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:19,534 INFO L514 BasicCegarLoop]: trace histogram [167, 167, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:19,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2022-01-31 18:12:19,534 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:19,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:19,534 INFO L85 PathProgramCache]: Analyzing trace with hash -901338656, now seen corresponding path program 166 times [2022-01-31 18:12:19,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:19,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1821781102] [2022-01-31 18:12:19,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:19,535 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:19,535 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:19,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:19,550 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:19,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:27,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:27,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:27,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:12:27,195 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:27,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1821781102] [2022-01-31 18:12:27,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1821781102] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:27,196 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:27,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [171] imperfect sequences [] total 171 [2022-01-31 18:12:27,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827175744] [2022-01-31 18:12:27,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:27,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 171 states [2022-01-31 18:12:27,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:27,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 171 interpolants. [2022-01-31 18:12:27,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14367, Invalid=14703, Unknown=0, NotChecked=0, Total=29070 [2022-01-31 18:12:27,199 INFO L87 Difference]: Start difference. First operand 351 states and 352 transitions. Second operand has 171 states, 171 states have (on average 2.017543859649123) internal successors, (345), 170 states have internal predecessors, (345), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)