/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_copy5_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 17:15:26,606 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 17:15:26,607 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 17:15:26,629 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 17:15:26,635 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 17:15:26,636 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 17:15:26,637 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 17:15:26,637 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 17:15:26,638 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 17:15:26,638 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 17:15:26,643 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 17:15:26,645 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 17:15:26,646 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 17:15:26,647 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 17:15:26,648 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 17:15:26,648 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 17:15:26,650 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 17:15:26,655 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 17:15:26,655 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 17:15:26,655 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 17:15:26,656 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 17:15:26,665 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 17:15:26,665 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 17:15:26,665 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 17:15:26,666 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 17:15:26,666 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 17:15:26,666 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 17:15:26,666 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 17:15:26,666 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 17:15:26,666 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 17:15:26,666 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 17:15:26,666 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 17:15:26,666 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 17:15:26,666 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 17:15:26,666 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 17:15:26,666 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 17:15:26,667 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 17:15:26,667 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 17:15:26,667 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 17:15:26,667 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 17:15:26,667 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 17:15:26,667 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 17:15:26,667 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 17:15:26,667 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 17:15:26,667 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 17:15:26,893 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 17:15:26,912 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 17:15:26,914 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 17:15:26,914 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 17:15:26,915 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 17:15:26,915 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy5_ground-2.i [2022-01-31 17:15:26,969 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78cbb346d/ff371e5f4f724176892233f062ced232/FLAG3488073de [2022-01-31 17:15:27,281 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 17:15:27,281 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy5_ground-2.i [2022-01-31 17:15:27,285 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78cbb346d/ff371e5f4f724176892233f062ced232/FLAG3488073de [2022-01-31 17:15:27,700 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78cbb346d/ff371e5f4f724176892233f062ced232 [2022-01-31 17:15:27,702 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 17:15:27,703 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 17:15:27,706 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 17:15:27,706 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 17:15:27,708 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 17:15:27,709 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:15:27" (1/1) ... [2022-01-31 17:15:27,709 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@228a1db8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:15:27, skipping insertion in model container [2022-01-31 17:15:27,709 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:15:27" (1/1) ... [2022-01-31 17:15:27,718 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 17:15:27,726 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 17:15:27,844 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_copy5_ground-2.i[816,829] [2022-01-31 17:15:27,873 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 17:15:27,885 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 17:15:27,901 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_copy5_ground-2.i[816,829] [2022-01-31 17:15:27,932 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 17:15:27,940 INFO L208 MainTranslator]: Completed translation [2022-01-31 17:15:27,941 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:15:27 WrapperNode [2022-01-31 17:15:27,941 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 17:15:27,941 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 17:15:27,941 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 17:15:27,942 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 17:15:27,949 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:15:27" (1/1) ... [2022-01-31 17:15:27,949 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:15:27" (1/1) ... [2022-01-31 17:15:27,954 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:15:27" (1/1) ... [2022-01-31 17:15:27,954 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:15:27" (1/1) ... [2022-01-31 17:15:27,959 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:15:27" (1/1) ... [2022-01-31 17:15:27,962 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:15:27" (1/1) ... [2022-01-31 17:15:27,963 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:15:27" (1/1) ... [2022-01-31 17:15:27,964 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 17:15:27,964 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 17:15:27,964 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 17:15:27,965 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 17:15:27,965 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:15:27" (1/1) ... [2022-01-31 17:15:27,969 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 17:15:27,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 17:15:28,018 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 17:15:28,047 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 17:15:28,066 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 17:15:28,067 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 17:15:28,067 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 17:15:28,067 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 17:15:28,067 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 17:15:28,068 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 17:15:28,068 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 17:15:28,068 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 17:15:28,068 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 17:15:28,068 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 17:15:28,069 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 17:15:28,069 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 17:15:28,069 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 17:15:28,069 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 17:15:28,070 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 17:15:28,071 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 17:15:28,071 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 17:15:28,071 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 17:15:28,072 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 17:15:28,072 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 17:15:28,072 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 17:15:28,119 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 17:15:28,120 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 17:15:28,256 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 17:15:28,260 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 17:15:28,260 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2022-01-31 17:15:28,261 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:15:28 BoogieIcfgContainer [2022-01-31 17:15:28,261 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 17:15:28,262 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 17:15:28,262 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 17:15:28,268 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 17:15:28,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 05:15:27" (1/3) ... [2022-01-31 17:15:28,269 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72136bd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:15:28, skipping insertion in model container [2022-01-31 17:15:28,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:15:27" (2/3) ... [2022-01-31 17:15:28,269 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72136bd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:15:28, skipping insertion in model container [2022-01-31 17:15:28,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:15:28" (3/3) ... [2022-01-31 17:15:28,270 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copy5_ground-2.i [2022-01-31 17:15:28,273 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 17:15:28,273 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 17:15:28,311 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 17:15:28,315 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 17:15:28,316 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 17:15:28,324 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 32 states have internal predecessors, (47), 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 17:15:28,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-31 17:15:28,329 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:28,329 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:28,329 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:28,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:28,332 INFO L85 PathProgramCache]: Analyzing trace with hash 120737551, now seen corresponding path program 1 times [2022-01-31 17:15:28,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:28,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1235793507] [2022-01-31 17:15:28,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:28,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:28,372 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:28,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:28,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:28,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:28,510 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 17:15:28,511 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:28,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1235793507] [2022-01-31 17:15:28,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1235793507] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:28,513 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:28,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 17:15:28,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166252792] [2022-01-31 17:15:28,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:28,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 17:15:28,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:28,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 17:15:28,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 17:15:28,544 INFO L87 Difference]: Start difference. First operand has 39 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 32 states have internal predecessors, (47), 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 6.333333333333333) internal successors, (19), 2 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 17:15:28,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:28,598 INFO L93 Difference]: Finished difference Result 70 states and 97 transitions. [2022-01-31 17:15:28,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 17:15:28,600 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-01-31 17:15:28,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:28,606 INFO L225 Difference]: With dead ends: 70 [2022-01-31 17:15:28,606 INFO L226 Difference]: Without dead ends: 34 [2022-01-31 17:15:28,611 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 17:15:28,616 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 36 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 47 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 17:15:28,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 47 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:15:28,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-01-31 17:15:28,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-01-31 17:15:28,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 28 states have (on average 1.25) internal successors, (35), 28 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:15:28,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2022-01-31 17:15:28,651 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 23 [2022-01-31 17:15:28,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:28,651 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2022-01-31 17:15:28,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 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 17:15:28,652 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2022-01-31 17:15:28,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-31 17:15:28,653 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:28,653 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:28,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 17:15:28,654 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:28,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:28,657 INFO L85 PathProgramCache]: Analyzing trace with hash 135437699, now seen corresponding path program 1 times [2022-01-31 17:15:28,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:28,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [14439811] [2022-01-31 17:15:28,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:28,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:28,660 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:28,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:28,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:28,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:28,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:15:28,742 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:28,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [14439811] [2022-01-31 17:15:28,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [14439811] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:28,743 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:28,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 17:15:28,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782010136] [2022-01-31 17:15:28,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:28,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 17:15:28,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:28,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 17:15:28,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 17:15:28,744 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 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 17:15:28,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:28,815 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2022-01-31 17:15:28,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 17:15:28,819 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-01-31 17:15:28,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:28,820 INFO L225 Difference]: With dead ends: 62 [2022-01-31 17:15:28,820 INFO L226 Difference]: Without dead ends: 36 [2022-01-31 17:15:28,820 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 17:15:28,821 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 35 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:28,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 44 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:15:28,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-01-31 17:15:28,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2022-01-31 17:15:28,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 29 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:15:28,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2022-01-31 17:15:28,827 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 23 [2022-01-31 17:15:28,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:28,827 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2022-01-31 17:15:28,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 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 17:15:28,827 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2022-01-31 17:15:28,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-31 17:15:28,828 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:28,828 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:28,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 17:15:28,828 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:28,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:28,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1998894687, now seen corresponding path program 1 times [2022-01-31 17:15:28,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:28,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2027784684] [2022-01-31 17:15:28,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:28,845 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:28,845 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:28,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:28,848 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:28,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:28,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:28,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:28,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:15:28,953 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:28,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2027784684] [2022-01-31 17:15:28,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2027784684] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:28,954 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:28,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 17:15:28,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108883891] [2022-01-31 17:15:28,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:28,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 17:15:28,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:28,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 17:15:28,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 17:15:28,955 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 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 17:15:29,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:29,055 INFO L93 Difference]: Finished difference Result 64 states and 76 transitions. [2022-01-31 17:15:29,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 17:15:29,056 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 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 25 [2022-01-31 17:15:29,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:29,056 INFO L225 Difference]: With dead ends: 64 [2022-01-31 17:15:29,057 INFO L226 Difference]: Without dead ends: 38 [2022-01-31 17:15:29,057 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 17:15:29,058 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 37 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:29,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 49 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:15:29,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-01-31 17:15:29,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2022-01-31 17:15:29,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 31 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:15:29,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2022-01-31 17:15:29,064 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 25 [2022-01-31 17:15:29,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:29,064 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2022-01-31 17:15:29,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 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 17:15:29,064 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2022-01-31 17:15:29,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-31 17:15:29,065 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:29,065 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:29,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 17:15:29,065 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:29,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:29,066 INFO L85 PathProgramCache]: Analyzing trace with hash -97950145, now seen corresponding path program 2 times [2022-01-31 17:15:29,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:29,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [843305436] [2022-01-31 17:15:29,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:29,069 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:29,069 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:29,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:29,070 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:29,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:29,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:29,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:29,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:15:29,152 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:29,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [843305436] [2022-01-31 17:15:29,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [843305436] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:29,152 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:29,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 17:15:29,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639939001] [2022-01-31 17:15:29,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:29,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 17:15:29,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:29,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 17:15:29,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 17:15:29,155 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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 17:15:29,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:29,221 INFO L93 Difference]: Finished difference Result 70 states and 85 transitions. [2022-01-31 17:15:29,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 17:15:29,222 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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 27 [2022-01-31 17:15:29,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:29,225 INFO L225 Difference]: With dead ends: 70 [2022-01-31 17:15:29,225 INFO L226 Difference]: Without dead ends: 47 [2022-01-31 17:15:29,225 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 17:15:29,234 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 43 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:29,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 36 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:15:29,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-01-31 17:15:29,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 42. [2022-01-31 17:15:29,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:15:29,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2022-01-31 17:15:29,241 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 27 [2022-01-31 17:15:29,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:29,241 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2022-01-31 17:15:29,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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 17:15:29,241 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2022-01-31 17:15:29,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-31 17:15:29,242 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:29,242 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:29,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 17:15:29,242 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:29,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:29,242 INFO L85 PathProgramCache]: Analyzing trace with hash 2003622165, now seen corresponding path program 1 times [2022-01-31 17:15:29,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:29,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1398872516] [2022-01-31 17:15:29,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:29,245 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:29,245 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:29,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:29,246 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:29,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:29,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:29,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:29,323 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 17:15:29,324 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:29,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1398872516] [2022-01-31 17:15:29,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1398872516] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:29,324 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:29,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 17:15:29,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139767990] [2022-01-31 17:15:29,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:29,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 17:15:29,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:29,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 17:15:29,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 17:15:29,326 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 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 17:15:29,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:29,415 INFO L93 Difference]: Finished difference Result 84 states and 99 transitions. [2022-01-31 17:15:29,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 17:15:29,417 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 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 37 [2022-01-31 17:15:29,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:29,420 INFO L225 Difference]: With dead ends: 84 [2022-01-31 17:15:29,421 INFO L226 Difference]: Without dead ends: 57 [2022-01-31 17:15:29,426 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 17:15:29,429 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 53 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:29,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 41 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:15:29,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-01-31 17:15:29,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 52. [2022-01-31 17:15:29,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 46 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:15:29,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2022-01-31 17:15:29,435 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 37 [2022-01-31 17:15:29,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:29,435 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2022-01-31 17:15:29,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 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 17:15:29,436 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2022-01-31 17:15:29,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-31 17:15:29,436 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:29,436 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:29,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 17:15:29,437 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:29,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:29,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1255274603, now seen corresponding path program 2 times [2022-01-31 17:15:29,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:29,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [933052775] [2022-01-31 17:15:29,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:29,449 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:29,449 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:29,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:29,450 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:29,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:29,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:29,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:29,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:15:29,543 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:29,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [933052775] [2022-01-31 17:15:29,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [933052775] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:29,543 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:29,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 17:15:29,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232624188] [2022-01-31 17:15:29,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:29,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 17:15:29,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:29,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 17:15:29,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 17:15:29,545 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 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 17:15:29,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:29,618 INFO L93 Difference]: Finished difference Result 96 states and 108 transitions. [2022-01-31 17:15:29,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 17:15:29,618 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 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 47 [2022-01-31 17:15:29,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:29,620 INFO L225 Difference]: With dead ends: 96 [2022-01-31 17:15:29,620 INFO L226 Difference]: Without dead ends: 55 [2022-01-31 17:15:29,621 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 17:15:29,622 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 39 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:29,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 44 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:15:29,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-01-31 17:15:29,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2022-01-31 17:15:29,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 48 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:15:29,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2022-01-31 17:15:29,637 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 47 [2022-01-31 17:15:29,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:29,637 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2022-01-31 17:15:29,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 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 17:15:29,637 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2022-01-31 17:15:29,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-01-31 17:15:29,640 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:29,640 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:29,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 17:15:29,641 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:29,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:29,641 INFO L85 PathProgramCache]: Analyzing trace with hash -453006711, now seen corresponding path program 3 times [2022-01-31 17:15:29,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:29,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [329344995] [2022-01-31 17:15:29,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:29,643 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:29,643 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:29,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:29,644 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:29,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:29,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:29,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:29,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:15:29,744 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:29,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [329344995] [2022-01-31 17:15:29,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [329344995] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:29,744 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:29,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 17:15:29,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355836825] [2022-01-31 17:15:29,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:29,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 17:15:29,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:29,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 17:15:29,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-31 17:15:29,745 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 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 17:15:29,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:29,870 INFO L93 Difference]: Finished difference Result 98 states and 110 transitions. [2022-01-31 17:15:29,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 17:15:29,871 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 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 49 [2022-01-31 17:15:29,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:29,873 INFO L225 Difference]: With dead ends: 98 [2022-01-31 17:15:29,873 INFO L226 Difference]: Without dead ends: 57 [2022-01-31 17:15:29,873 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 17:15:29,874 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 41 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:29,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 59 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:15:29,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-01-31 17:15:29,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2022-01-31 17:15:29,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 50 states have (on average 1.14) internal successors, (57), 50 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:15:29,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2022-01-31 17:15:29,880 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 49 [2022-01-31 17:15:29,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:29,881 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2022-01-31 17:15:29,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 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 17:15:29,881 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2022-01-31 17:15:29,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-31 17:15:29,881 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:29,881 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:29,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 17:15:29,882 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:29,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:29,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1433842393, now seen corresponding path program 4 times [2022-01-31 17:15:29,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:29,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [369062795] [2022-01-31 17:15:29,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:29,884 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:29,884 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:29,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:29,885 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:29,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:29,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:29,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:29,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:15:29,984 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:29,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [369062795] [2022-01-31 17:15:29,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [369062795] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:29,984 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:29,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 17:15:29,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015477704] [2022-01-31 17:15:29,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:29,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 17:15:29,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:29,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 17:15:29,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 17:15:29,987 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 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 17:15:30,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:30,095 INFO L93 Difference]: Finished difference Result 100 states and 112 transitions. [2022-01-31 17:15:30,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 17:15:30,096 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 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 51 [2022-01-31 17:15:30,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:30,096 INFO L225 Difference]: With dead ends: 100 [2022-01-31 17:15:30,096 INFO L226 Difference]: Without dead ends: 59 [2022-01-31 17:15:30,099 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 17:15:30,099 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 43 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:30,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 54 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:15:30,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-01-31 17:15:30,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2022-01-31 17:15:30,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 52 states have (on average 1.1346153846153846) internal successors, (59), 52 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:15:30,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 64 transitions. [2022-01-31 17:15:30,109 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 64 transitions. Word has length 51 [2022-01-31 17:15:30,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:30,109 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 64 transitions. [2022-01-31 17:15:30,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 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 17:15:30,110 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 64 transitions. [2022-01-31 17:15:30,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-31 17:15:30,110 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:30,110 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:30,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 17:15:30,110 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:30,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:30,111 INFO L85 PathProgramCache]: Analyzing trace with hash 875872325, now seen corresponding path program 5 times [2022-01-31 17:15:30,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:30,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [524134611] [2022-01-31 17:15:30,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:30,113 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:30,113 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:30,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:30,114 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:30,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:30,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:30,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:30,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:15:30,188 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:30,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [524134611] [2022-01-31 17:15:30,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [524134611] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:30,189 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:30,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 17:15:30,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628284179] [2022-01-31 17:15:30,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:30,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 17:15:30,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:30,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 17:15:30,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-31 17:15:30,190 INFO L87 Difference]: Start difference. First operand 58 states and 64 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 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 17:15:30,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:30,302 INFO L93 Difference]: Finished difference Result 102 states and 114 transitions. [2022-01-31 17:15:30,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 17:15:30,302 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 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 53 [2022-01-31 17:15:30,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:30,303 INFO L225 Difference]: With dead ends: 102 [2022-01-31 17:15:30,303 INFO L226 Difference]: Without dead ends: 61 [2022-01-31 17:15:30,303 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 17:15:30,305 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 45 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:30,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 54 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:15:30,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-01-31 17:15:30,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2022-01-31 17:15:30,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 54 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:15:30,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2022-01-31 17:15:30,319 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 53 [2022-01-31 17:15:30,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:30,319 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2022-01-31 17:15:30,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 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 17:15:30,319 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2022-01-31 17:15:30,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-31 17:15:30,321 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:30,321 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:30,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 17:15:30,322 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:30,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:30,322 INFO L85 PathProgramCache]: Analyzing trace with hash 13624291, now seen corresponding path program 6 times [2022-01-31 17:15:30,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:30,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [513235300] [2022-01-31 17:15:30,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:30,325 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:30,325 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:30,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:30,326 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:30,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:30,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:30,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:30,415 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 17:15:30,415 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:30,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [513235300] [2022-01-31 17:15:30,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [513235300] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:30,415 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:30,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 17:15:30,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203546057] [2022-01-31 17:15:30,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:30,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 17:15:30,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:30,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 17:15:30,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-01-31 17:15:30,416 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 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 17:15:30,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:30,524 INFO L93 Difference]: Finished difference Result 104 states and 116 transitions. [2022-01-31 17:15:30,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 17:15:30,525 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 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 55 [2022-01-31 17:15:30,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:30,525 INFO L225 Difference]: With dead ends: 104 [2022-01-31 17:15:30,525 INFO L226 Difference]: Without dead ends: 63 [2022-01-31 17:15:30,525 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 17:15:30,526 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 47 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:30,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 49 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:15:30,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-01-31 17:15:30,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2022-01-31 17:15:30,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 56 states have (on average 1.125) internal successors, (63), 56 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:15:30,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2022-01-31 17:15:30,529 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 55 [2022-01-31 17:15:30,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:30,530 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2022-01-31 17:15:30,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 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 17:15:30,530 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2022-01-31 17:15:30,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-31 17:15:30,530 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:30,530 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:30,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 17:15:30,530 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:30,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:30,531 INFO L85 PathProgramCache]: Analyzing trace with hash 321951745, now seen corresponding path program 7 times [2022-01-31 17:15:30,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:30,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [821270778] [2022-01-31 17:15:30,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:30,533 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:30,533 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:30,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:30,534 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:30,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:30,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:30,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:30,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:15:30,611 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:30,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [821270778] [2022-01-31 17:15:30,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [821270778] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:30,612 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:30,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 17:15:30,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835753459] [2022-01-31 17:15:30,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:30,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 17:15:30,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:30,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 17:15:30,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2022-01-31 17:15:30,613 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 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 17:15:30,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:30,744 INFO L93 Difference]: Finished difference Result 106 states and 118 transitions. [2022-01-31 17:15:30,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 17:15:30,745 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 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 57 [2022-01-31 17:15:30,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:30,745 INFO L225 Difference]: With dead ends: 106 [2022-01-31 17:15:30,745 INFO L226 Difference]: Without dead ends: 65 [2022-01-31 17:15:30,746 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 17:15:30,746 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 49 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:30,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 54 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:15:30,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-01-31 17:15:30,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2022-01-31 17:15:30,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 58 states have (on average 1.1206896551724137) internal successors, (65), 58 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:15:30,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2022-01-31 17:15:30,751 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 57 [2022-01-31 17:15:30,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:30,751 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2022-01-31 17:15:30,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 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 17:15:30,751 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2022-01-31 17:15:30,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-31 17:15:30,752 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:30,752 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:30,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 17:15:30,752 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:30,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:30,752 INFO L85 PathProgramCache]: Analyzing trace with hash 271891615, now seen corresponding path program 8 times [2022-01-31 17:15:30,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:30,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [405398137] [2022-01-31 17:15:30,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:30,754 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:30,754 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:30,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:30,756 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:30,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:30,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:30,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:30,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:15:30,858 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:30,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [405398137] [2022-01-31 17:15:30,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [405398137] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:30,858 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:30,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 17:15:30,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440256359] [2022-01-31 17:15:30,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:30,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 17:15:30,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:30,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 17:15:30,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-01-31 17:15:30,859 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 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 17:15:30,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:30,990 INFO L93 Difference]: Finished difference Result 108 states and 120 transitions. [2022-01-31 17:15:30,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 17:15:30,990 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 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 59 [2022-01-31 17:15:30,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:30,990 INFO L225 Difference]: With dead ends: 108 [2022-01-31 17:15:30,990 INFO L226 Difference]: Without dead ends: 67 [2022-01-31 17:15:30,991 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 17:15:30,991 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 51 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:30,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 49 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:15:30,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-01-31 17:15:30,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2022-01-31 17:15:30,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 60 states have (on average 1.1166666666666667) internal successors, (67), 60 states have internal predecessors, (67), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:15:30,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 72 transitions. [2022-01-31 17:15:30,995 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 72 transitions. Word has length 59 [2022-01-31 17:15:30,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:30,996 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 72 transitions. [2022-01-31 17:15:30,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 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 17:15:30,996 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 72 transitions. [2022-01-31 17:15:30,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-31 17:15:30,996 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:30,996 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:30,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-31 17:15:30,996 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:30,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:30,997 INFO L85 PathProgramCache]: Analyzing trace with hash -591253059, now seen corresponding path program 9 times [2022-01-31 17:15:30,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:30,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [191029311] [2022-01-31 17:15:30,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:30,998 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:30,998 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:30,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:31,000 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:31,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:31,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:31,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:31,097 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 17:15:31,097 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:31,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [191029311] [2022-01-31 17:15:31,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [191029311] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:31,097 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:31,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 17:15:31,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640538771] [2022-01-31 17:15:31,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:31,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 17:15:31,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:31,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 17:15:31,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2022-01-31 17:15:31,098 INFO L87 Difference]: Start difference. First operand 66 states and 72 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 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 17:15:31,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:31,256 INFO L93 Difference]: Finished difference Result 110 states and 122 transitions. [2022-01-31 17:15:31,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 17:15:31,257 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 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 61 [2022-01-31 17:15:31,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:31,257 INFO L225 Difference]: With dead ends: 110 [2022-01-31 17:15:31,257 INFO L226 Difference]: Without dead ends: 69 [2022-01-31 17:15:31,258 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 17:15:31,258 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 53 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:31,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 64 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:15:31,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-01-31 17:15:31,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2022-01-31 17:15:31,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 62 states have (on average 1.1129032258064515) internal successors, (69), 62 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:15:31,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 74 transitions. [2022-01-31 17:15:31,262 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 74 transitions. Word has length 61 [2022-01-31 17:15:31,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:31,262 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 74 transitions. [2022-01-31 17:15:31,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 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 17:15:31,263 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 74 transitions. [2022-01-31 17:15:31,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 17:15:31,263 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:31,263 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:31,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 17:15:31,263 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:31,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:31,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1144596645, now seen corresponding path program 10 times [2022-01-31 17:15:31,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:31,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2082892405] [2022-01-31 17:15:31,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:31,265 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:31,265 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:31,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:31,266 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:31,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:31,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:31,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:31,376 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 17:15:31,376 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:31,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2082892405] [2022-01-31 17:15:31,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2082892405] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:31,376 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:31,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 17:15:31,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489823231] [2022-01-31 17:15:31,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:31,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 17:15:31,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:31,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 17:15:31,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-01-31 17:15:31,377 INFO L87 Difference]: Start difference. First operand 68 states and 74 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 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 17:15:31,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:31,536 INFO L93 Difference]: Finished difference Result 112 states and 124 transitions. [2022-01-31 17:15:31,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 17:15:31,536 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 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 63 [2022-01-31 17:15:31,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:31,537 INFO L225 Difference]: With dead ends: 112 [2022-01-31 17:15:31,537 INFO L226 Difference]: Without dead ends: 71 [2022-01-31 17:15:31,537 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 17:15:31,538 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 55 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:31,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 54 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:15:31,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-01-31 17:15:31,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2022-01-31 17:15:31,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 64 states have (on average 1.109375) internal successors, (71), 64 states have internal predecessors, (71), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:15:31,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2022-01-31 17:15:31,542 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 63 [2022-01-31 17:15:31,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:31,542 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2022-01-31 17:15:31,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 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 17:15:31,542 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2022-01-31 17:15:31,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-31 17:15:31,543 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:31,543 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:31,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-31 17:15:31,543 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:31,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:31,543 INFO L85 PathProgramCache]: Analyzing trace with hash -331838087, now seen corresponding path program 11 times [2022-01-31 17:15:31,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:31,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2141455847] [2022-01-31 17:15:31,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:31,545 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:31,545 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:31,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:31,547 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:31,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:31,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:31,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:31,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:15:31,664 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:31,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2141455847] [2022-01-31 17:15:31,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2141455847] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:31,664 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:31,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 17:15:31,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266328383] [2022-01-31 17:15:31,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:31,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 17:15:31,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:31,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 17:15:31,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2022-01-31 17:15:31,665 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 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 17:15:31,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:31,830 INFO L93 Difference]: Finished difference Result 114 states and 126 transitions. [2022-01-31 17:15:31,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 17:15:31,831 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 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 65 [2022-01-31 17:15:31,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:31,831 INFO L225 Difference]: With dead ends: 114 [2022-01-31 17:15:31,831 INFO L226 Difference]: Without dead ends: 73 [2022-01-31 17:15:31,832 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 17:15:31,832 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 57 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:31,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 49 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:15:31,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-01-31 17:15:31,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2022-01-31 17:15:31,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 66 states have (on average 1.106060606060606) internal successors, (73), 66 states have internal predecessors, (73), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:15:31,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 78 transitions. [2022-01-31 17:15:31,837 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 78 transitions. Word has length 65 [2022-01-31 17:15:31,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:31,838 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 78 transitions. [2022-01-31 17:15:31,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 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 17:15:31,838 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 78 transitions. [2022-01-31 17:15:31,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-31 17:15:31,838 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:31,838 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:31,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-31 17:15:31,838 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:31,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:31,839 INFO L85 PathProgramCache]: Analyzing trace with hash -954911721, now seen corresponding path program 12 times [2022-01-31 17:15:31,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:31,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [413011534] [2022-01-31 17:15:31,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:31,840 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:31,841 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:31,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:31,842 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:31,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:31,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:31,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:31,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:15:31,980 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:31,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [413011534] [2022-01-31 17:15:31,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [413011534] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:31,980 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:31,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 17:15:31,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833896835] [2022-01-31 17:15:31,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:31,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 17:15:31,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:31,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 17:15:31,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2022-01-31 17:15:31,981 INFO L87 Difference]: Start difference. First operand 72 states and 78 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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 17:15:32,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:32,169 INFO L93 Difference]: Finished difference Result 116 states and 128 transitions. [2022-01-31 17:15:32,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 17:15:32,169 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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 67 [2022-01-31 17:15:32,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:32,170 INFO L225 Difference]: With dead ends: 116 [2022-01-31 17:15:32,170 INFO L226 Difference]: Without dead ends: 75 [2022-01-31 17:15:32,170 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 17:15:32,171 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 59 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:32,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 59 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:15:32,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-01-31 17:15:32,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2022-01-31 17:15:32,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 68 states have (on average 1.1029411764705883) internal successors, (75), 68 states have internal predecessors, (75), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:15:32,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 80 transitions. [2022-01-31 17:15:32,175 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 80 transitions. Word has length 67 [2022-01-31 17:15:32,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:32,175 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 80 transitions. [2022-01-31 17:15:32,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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 17:15:32,175 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 80 transitions. [2022-01-31 17:15:32,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-31 17:15:32,175 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:32,175 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:32,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-31 17:15:32,176 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:32,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:32,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1566747445, now seen corresponding path program 13 times [2022-01-31 17:15:32,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:32,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1000604375] [2022-01-31 17:15:32,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:32,177 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:32,178 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:32,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:32,179 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:32,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:32,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:32,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:32,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:15:32,370 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:32,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1000604375] [2022-01-31 17:15:32,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1000604375] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:32,370 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:32,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 17:15:32,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437646828] [2022-01-31 17:15:32,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:32,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 17:15:32,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:32,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 17:15:32,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2022-01-31 17:15:32,371 INFO L87 Difference]: Start difference. First operand 74 states and 80 transitions. Second operand has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 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 17:15:32,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:32,620 INFO L93 Difference]: Finished difference Result 118 states and 130 transitions. [2022-01-31 17:15:32,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 17:15:32,620 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 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 69 [2022-01-31 17:15:32,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:32,620 INFO L225 Difference]: With dead ends: 118 [2022-01-31 17:15:32,621 INFO L226 Difference]: Without dead ends: 77 [2022-01-31 17:15:32,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2022-01-31 17:15:32,621 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 61 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:32,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 64 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:15:32,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-01-31 17:15:32,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2022-01-31 17:15:32,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 70 states have (on average 1.1) internal successors, (77), 70 states have internal predecessors, (77), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:15:32,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 82 transitions. [2022-01-31 17:15:32,626 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 82 transitions. Word has length 69 [2022-01-31 17:15:32,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:32,626 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 82 transitions. [2022-01-31 17:15:32,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 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 17:15:32,626 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 82 transitions. [2022-01-31 17:15:32,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-31 17:15:32,626 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:32,626 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:32,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-31 17:15:32,627 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:32,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:32,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1775316269, now seen corresponding path program 14 times [2022-01-31 17:15:32,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:32,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1849639162] [2022-01-31 17:15:32,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:32,628 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:32,628 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:32,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:32,630 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:32,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:32,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:32,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:32,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:15:32,774 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:32,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1849639162] [2022-01-31 17:15:32,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1849639162] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:32,774 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:32,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 17:15:32,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450429008] [2022-01-31 17:15:32,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:32,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 17:15:32,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:32,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 17:15:32,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-01-31 17:15:32,775 INFO L87 Difference]: Start difference. First operand 76 states and 82 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 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 17:15:32,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:32,965 INFO L93 Difference]: Finished difference Result 120 states and 132 transitions. [2022-01-31 17:15:32,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 17:15:32,966 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 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 71 [2022-01-31 17:15:32,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:32,966 INFO L225 Difference]: With dead ends: 120 [2022-01-31 17:15:32,966 INFO L226 Difference]: Without dead ends: 79 [2022-01-31 17:15:32,967 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 17:15:32,967 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 63 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:32,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 49 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:15:32,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-01-31 17:15:32,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2022-01-31 17:15:32,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 72 states have (on average 1.0972222222222223) internal successors, (79), 72 states have internal predecessors, (79), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:15:32,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 84 transitions. [2022-01-31 17:15:32,972 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 84 transitions. Word has length 71 [2022-01-31 17:15:32,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:32,972 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 84 transitions. [2022-01-31 17:15:32,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 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 17:15:32,972 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 84 transitions. [2022-01-31 17:15:32,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-31 17:15:32,973 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:32,973 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:32,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-31 17:15:32,973 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:32,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:32,973 INFO L85 PathProgramCache]: Analyzing trace with hash -863008015, now seen corresponding path program 15 times [2022-01-31 17:15:32,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:32,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1173648727] [2022-01-31 17:15:32,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:32,975 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:32,975 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:32,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:32,976 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:32,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:33,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:33,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:33,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:15:33,135 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:33,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1173648727] [2022-01-31 17:15:33,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1173648727] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:33,136 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:33,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 17:15:33,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142801827] [2022-01-31 17:15:33,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:33,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 17:15:33,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:33,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 17:15:33,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2022-01-31 17:15:33,136 INFO L87 Difference]: Start difference. First operand 78 states and 84 transitions. Second operand has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 18 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 17:15:33,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:33,382 INFO L93 Difference]: Finished difference Result 122 states and 134 transitions. [2022-01-31 17:15:33,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 17:15:33,383 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 18 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 73 [2022-01-31 17:15:33,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:33,383 INFO L225 Difference]: With dead ends: 122 [2022-01-31 17:15:33,383 INFO L226 Difference]: Without dead ends: 81 [2022-01-31 17:15:33,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 17:15:33,384 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 65 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:33,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 49 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:15:33,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-01-31 17:15:33,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2022-01-31 17:15:33,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 74 states have (on average 1.0945945945945945) internal successors, (81), 74 states have internal predecessors, (81), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:15:33,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 86 transitions. [2022-01-31 17:15:33,390 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 86 transitions. Word has length 73 [2022-01-31 17:15:33,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:33,390 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 86 transitions. [2022-01-31 17:15:33,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 18 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 17:15:33,390 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 86 transitions. [2022-01-31 17:15:33,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-31 17:15:33,391 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:33,391 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:33,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-31 17:15:33,391 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:33,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:33,391 INFO L85 PathProgramCache]: Analyzing trace with hash -308104305, now seen corresponding path program 16 times [2022-01-31 17:15:33,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:33,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1880179902] [2022-01-31 17:15:33,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:33,393 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:33,393 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:33,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:33,395 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:33,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:33,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:33,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:33,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:15:33,568 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:33,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1880179902] [2022-01-31 17:15:33,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1880179902] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:33,568 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:33,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 17:15:33,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285656531] [2022-01-31 17:15:33,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:33,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 17:15:33,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:33,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 17:15:33,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2022-01-31 17:15:33,569 INFO L87 Difference]: Start difference. First operand 80 states and 86 transitions. Second operand has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 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 17:15:33,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:33,792 INFO L93 Difference]: Finished difference Result 124 states and 136 transitions. [2022-01-31 17:15:33,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 17:15:33,792 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 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 75 [2022-01-31 17:15:33,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:33,793 INFO L225 Difference]: With dead ends: 124 [2022-01-31 17:15:33,793 INFO L226 Difference]: Without dead ends: 83 [2022-01-31 17:15:33,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=513, Invalid=819, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 17:15:33,794 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 67 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:33,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 54 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:15:33,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-01-31 17:15:33,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2022-01-31 17:15:33,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 76 states have (on average 1.0921052631578947) internal successors, (83), 76 states have internal predecessors, (83), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:15:33,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 88 transitions. [2022-01-31 17:15:33,799 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 88 transitions. Word has length 75 [2022-01-31 17:15:33,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:33,799 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 88 transitions. [2022-01-31 17:15:33,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 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 17:15:33,799 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 88 transitions. [2022-01-31 17:15:33,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-31 17:15:33,799 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:33,799 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:33,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-31 17:15:33,799 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:33,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:33,800 INFO L85 PathProgramCache]: Analyzing trace with hash 378416301, now seen corresponding path program 17 times [2022-01-31 17:15:33,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:33,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1971399592] [2022-01-31 17:15:33,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:33,801 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:33,801 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:33,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:33,803 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:33,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:33,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:33,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:33,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:15:33,991 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:33,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1971399592] [2022-01-31 17:15:33,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1971399592] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:33,991 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:33,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 17:15:33,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742856219] [2022-01-31 17:15:33,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:33,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 17:15:33,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:33,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 17:15:33,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2022-01-31 17:15:33,992 INFO L87 Difference]: Start difference. First operand 82 states and 88 transitions. Second operand has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 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 17:15:34,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:34,249 INFO L93 Difference]: Finished difference Result 126 states and 138 transitions. [2022-01-31 17:15:34,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 17:15:34,249 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 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 77 [2022-01-31 17:15:34,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:34,249 INFO L225 Difference]: With dead ends: 126 [2022-01-31 17:15:34,249 INFO L226 Difference]: Without dead ends: 85 [2022-01-31 17:15:34,250 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 17:15:34,250 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 69 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:34,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 49 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:15:34,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-01-31 17:15:34,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2022-01-31 17:15:34,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 78 states have (on average 1.0897435897435896) internal successors, (85), 78 states have internal predecessors, (85), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:15:34,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 90 transitions. [2022-01-31 17:15:34,256 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 90 transitions. Word has length 77 [2022-01-31 17:15:34,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:34,256 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 90 transitions. [2022-01-31 17:15:34,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 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 17:15:34,256 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 90 transitions. [2022-01-31 17:15:34,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-31 17:15:34,258 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:34,258 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:34,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-31 17:15:34,259 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:34,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:34,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1300244917, now seen corresponding path program 18 times [2022-01-31 17:15:34,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:34,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [60735698] [2022-01-31 17:15:34,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:34,261 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:34,261 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:34,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:34,262 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:34,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:34,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:34,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:34,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:15:34,464 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:34,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [60735698] [2022-01-31 17:15:34,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [60735698] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:34,464 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:34,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 17:15:34,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129415874] [2022-01-31 17:15:34,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:34,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 17:15:34,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:34,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 17:15:34,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2022-01-31 17:15:34,466 INFO L87 Difference]: Start difference. First operand 84 states and 90 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 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 17:15:34,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:34,766 INFO L93 Difference]: Finished difference Result 128 states and 140 transitions. [2022-01-31 17:15:34,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 17:15:34,768 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 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 79 [2022-01-31 17:15:34,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:34,769 INFO L225 Difference]: With dead ends: 128 [2022-01-31 17:15:34,769 INFO L226 Difference]: Without dead ends: 87 [2022-01-31 17:15:34,769 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 17:15:34,770 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 71 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:34,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 49 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:15:34,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-01-31 17:15:34,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2022-01-31 17:15:34,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 80 states have (on average 1.0875) internal successors, (87), 80 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:15:34,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 92 transitions. [2022-01-31 17:15:34,775 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 92 transitions. Word has length 79 [2022-01-31 17:15:34,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:34,776 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 92 transitions. [2022-01-31 17:15:34,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 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 17:15:34,776 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 92 transitions. [2022-01-31 17:15:34,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-01-31 17:15:34,776 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:34,776 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:34,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-31 17:15:34,776 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:34,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:34,777 INFO L85 PathProgramCache]: Analyzing trace with hash 414027881, now seen corresponding path program 19 times [2022-01-31 17:15:34,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:34,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [123947299] [2022-01-31 17:15:34,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:34,778 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:34,778 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:34,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:34,780 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:34,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:34,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:34,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:34,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:15:34,985 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:34,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [123947299] [2022-01-31 17:15:34,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [123947299] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:34,985 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:34,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 17:15:34,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65211201] [2022-01-31 17:15:34,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:34,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 17:15:34,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:34,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 17:15:34,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2022-01-31 17:15:34,986 INFO L87 Difference]: Start difference. First operand 86 states and 92 transitions. Second operand has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 22 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:35,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:35,336 INFO L93 Difference]: Finished difference Result 130 states and 142 transitions. [2022-01-31 17:15:35,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 17:15:35,336 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 22 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2022-01-31 17:15:35,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:35,336 INFO L225 Difference]: With dead ends: 130 [2022-01-31 17:15:35,337 INFO L226 Difference]: Without dead ends: 89 [2022-01-31 17:15:35,337 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 17:15:35,338 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 73 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:35,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 74 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:15:35,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-01-31 17:15:35,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2022-01-31 17:15:35,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 82 states have (on average 1.0853658536585367) internal successors, (89), 82 states have internal predecessors, (89), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:15:35,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 94 transitions. [2022-01-31 17:15:35,343 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 94 transitions. Word has length 81 [2022-01-31 17:15:35,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:35,344 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 94 transitions. [2022-01-31 17:15:35,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 22 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:35,344 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 94 transitions. [2022-01-31 17:15:35,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-31 17:15:35,344 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:35,344 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:35,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-31 17:15:35,344 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:35,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:35,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1437254905, now seen corresponding path program 20 times [2022-01-31 17:15:35,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:35,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1117538105] [2022-01-31 17:15:35,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:35,346 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:35,346 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:35,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:35,348 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:35,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:35,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:35,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:35,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:15:35,569 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:35,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1117538105] [2022-01-31 17:15:35,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1117538105] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:35,570 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:35,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 17:15:35,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359847902] [2022-01-31 17:15:35,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:35,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 17:15:35,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:35,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 17:15:35,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2022-01-31 17:15:35,571 INFO L87 Difference]: Start difference. First operand 88 states and 94 transitions. Second operand has 24 states, 24 states have (on average 2.875) internal successors, (69), 23 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 17:15:35,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:35,897 INFO L93 Difference]: Finished difference Result 132 states and 144 transitions. [2022-01-31 17:15:35,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 17:15:35,897 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.875) internal successors, (69), 23 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 83 [2022-01-31 17:15:35,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:35,898 INFO L225 Difference]: With dead ends: 132 [2022-01-31 17:15:35,898 INFO L226 Difference]: Without dead ends: 91 [2022-01-31 17:15:35,898 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 17:15:35,899 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 75 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:35,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 64 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:15:35,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-01-31 17:15:35,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2022-01-31 17:15:35,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 84 states have (on average 1.0833333333333333) internal successors, (91), 84 states have internal predecessors, (91), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:15:35,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 96 transitions. [2022-01-31 17:15:35,905 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 96 transitions. Word has length 83 [2022-01-31 17:15:35,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:35,905 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 96 transitions. [2022-01-31 17:15:35,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.875) internal successors, (69), 23 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 17:15:35,905 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 96 transitions. [2022-01-31 17:15:35,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-01-31 17:15:35,905 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:35,905 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:35,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-31 17:15:35,906 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:35,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:35,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1891415589, now seen corresponding path program 21 times [2022-01-31 17:15:35,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:35,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1755148568] [2022-01-31 17:15:35,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:35,907 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:35,908 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:35,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:35,910 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:35,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:36,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:36,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:36,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:15:36,189 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:36,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1755148568] [2022-01-31 17:15:36,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1755148568] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:36,189 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:36,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 17:15:36,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025936977] [2022-01-31 17:15:36,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:36,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 17:15:36,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:36,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 17:15:36,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2022-01-31 17:15:36,190 INFO L87 Difference]: Start difference. First operand 90 states and 96 transitions. Second operand has 25 states, 25 states have (on average 2.84) internal successors, (71), 24 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 17:15:36,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:36,554 INFO L93 Difference]: Finished difference Result 134 states and 146 transitions. [2022-01-31 17:15:36,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 17:15:36,554 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.84) internal successors, (71), 24 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 85 [2022-01-31 17:15:36,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:36,555 INFO L225 Difference]: With dead ends: 134 [2022-01-31 17:15:36,555 INFO L226 Difference]: Without dead ends: 93 [2022-01-31 17:15:36,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=828, Invalid=1334, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 17:15:36,556 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 77 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:36,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 59 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:15:36,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-01-31 17:15:36,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2022-01-31 17:15:36,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 86 states have (on average 1.0813953488372092) internal successors, (93), 86 states have internal predecessors, (93), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:15:36,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 98 transitions. [2022-01-31 17:15:36,565 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 98 transitions. Word has length 85 [2022-01-31 17:15:36,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:36,565 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 98 transitions. [2022-01-31 17:15:36,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.84) internal successors, (71), 24 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 17:15:36,565 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 98 transitions. [2022-01-31 17:15:36,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-01-31 17:15:36,566 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:36,566 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:36,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-31 17:15:36,566 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:36,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:36,566 INFO L85 PathProgramCache]: Analyzing trace with hash 993124803, now seen corresponding path program 22 times [2022-01-31 17:15:36,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:36,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [327806008] [2022-01-31 17:15:36,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:36,568 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:36,568 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:36,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:36,570 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:36,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:36,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:36,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:36,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:15:36,833 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:36,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [327806008] [2022-01-31 17:15:36,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [327806008] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:36,833 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:36,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 17:15:36,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864601999] [2022-01-31 17:15:36,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:36,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 17:15:36,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:36,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 17:15:36,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-01-31 17:15:36,835 INFO L87 Difference]: Start difference. First operand 92 states and 98 transitions. Second operand has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 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 17:15:37,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:37,204 INFO L93 Difference]: Finished difference Result 136 states and 148 transitions. [2022-01-31 17:15:37,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 17:15:37,205 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 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 87 [2022-01-31 17:15:37,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:37,205 INFO L225 Difference]: With dead ends: 136 [2022-01-31 17:15:37,206 INFO L226 Difference]: Without dead ends: 95 [2022-01-31 17:15:37,206 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 17:15:37,207 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 79 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:37,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 64 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:15:37,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-01-31 17:15:37,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2022-01-31 17:15:37,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 88 states have (on average 1.0795454545454546) internal successors, (95), 88 states have internal predecessors, (95), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:15:37,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 100 transitions. [2022-01-31 17:15:37,217 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 100 transitions. Word has length 87 [2022-01-31 17:15:37,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:37,217 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 100 transitions. [2022-01-31 17:15:37,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 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 17:15:37,218 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 100 transitions. [2022-01-31 17:15:37,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-01-31 17:15:37,218 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:37,218 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:37,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-01-31 17:15:37,218 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:37,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:37,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1024105953, now seen corresponding path program 23 times [2022-01-31 17:15:37,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:37,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1479681736] [2022-01-31 17:15:37,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:37,220 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:37,221 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:37,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:37,224 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:37,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:37,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:37,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:37,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:15:37,500 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:37,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1479681736] [2022-01-31 17:15:37,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1479681736] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:37,500 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:37,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 17:15:37,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399172439] [2022-01-31 17:15:37,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:37,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 17:15:37,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:37,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 17:15:37,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2022-01-31 17:15:37,502 INFO L87 Difference]: Start difference. First operand 94 states and 100 transitions. Second operand has 27 states, 27 states have (on average 2.7777777777777777) internal successors, (75), 26 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 17:15:37,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:37,926 INFO L93 Difference]: Finished difference Result 138 states and 150 transitions. [2022-01-31 17:15:37,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 17:15:37,926 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.7777777777777777) internal successors, (75), 26 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 89 [2022-01-31 17:15:37,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:37,927 INFO L225 Difference]: With dead ends: 138 [2022-01-31 17:15:37,927 INFO L226 Difference]: Without dead ends: 97 [2022-01-31 17:15:37,927 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 17:15:37,928 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 81 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:37,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 64 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:15:37,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-01-31 17:15:37,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2022-01-31 17:15:37,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 90 states have (on average 1.0777777777777777) internal successors, (97), 90 states have internal predecessors, (97), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:15:37,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 102 transitions. [2022-01-31 17:15:37,935 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 102 transitions. Word has length 89 [2022-01-31 17:15:37,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:37,935 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 102 transitions. [2022-01-31 17:15:37,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.7777777777777777) internal successors, (75), 26 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 17:15:37,935 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 102 transitions. [2022-01-31 17:15:37,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-01-31 17:15:37,936 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:37,936 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:37,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-01-31 17:15:37,936 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:37,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:37,937 INFO L85 PathProgramCache]: Analyzing trace with hash 732220031, now seen corresponding path program 24 times [2022-01-31 17:15:37,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:37,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [668908463] [2022-01-31 17:15:37,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:37,938 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:37,938 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:37,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:37,941 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:37,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:38,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:38,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:38,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:15:38,197 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:38,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [668908463] [2022-01-31 17:15:38,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [668908463] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:38,198 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:38,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 17:15:38,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195336159] [2022-01-31 17:15:38,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:38,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 17:15:38,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:38,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 17:15:38,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2022-01-31 17:15:38,199 INFO L87 Difference]: Start difference. First operand 96 states and 102 transitions. Second operand has 28 states, 28 states have (on average 2.75) internal successors, (77), 27 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 17:15:38,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:38,489 INFO L93 Difference]: Finished difference Result 140 states and 152 transitions. [2022-01-31 17:15:38,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 17:15:38,489 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.75) internal successors, (77), 27 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 91 [2022-01-31 17:15:38,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:38,490 INFO L225 Difference]: With dead ends: 140 [2022-01-31 17:15:38,490 INFO L226 Difference]: Without dead ends: 99 [2022-01-31 17:15:38,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1053, Invalid=1703, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 17:15:38,491 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 83 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:38,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 59 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:15:38,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-01-31 17:15:38,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2022-01-31 17:15:38,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 92 states have (on average 1.076086956521739) internal successors, (99), 92 states have internal predecessors, (99), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:15:38,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 104 transitions. [2022-01-31 17:15:38,498 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 104 transitions. Word has length 91 [2022-01-31 17:15:38,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:38,498 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 104 transitions. [2022-01-31 17:15:38,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.75) internal successors, (77), 27 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 17:15:38,498 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 104 transitions. [2022-01-31 17:15:38,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-01-31 17:15:38,499 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:38,499 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:38,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-01-31 17:15:38,499 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:38,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:38,499 INFO L85 PathProgramCache]: Analyzing trace with hash -597276771, now seen corresponding path program 25 times [2022-01-31 17:15:38,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:38,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [147143196] [2022-01-31 17:15:38,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:38,515 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:38,515 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:38,515 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:38,518 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:38,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:38,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:38,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:38,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:15:38,771 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:38,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [147143196] [2022-01-31 17:15:38,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [147143196] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:38,771 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:38,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 17:15:38,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346136018] [2022-01-31 17:15:38,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:38,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 17:15:38,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:38,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 17:15:38,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2022-01-31 17:15:38,772 INFO L87 Difference]: Start difference. First operand 98 states and 104 transitions. Second operand has 29 states, 29 states have (on average 2.7241379310344827) internal successors, (79), 28 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 17:15:39,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:39,111 INFO L93 Difference]: Finished difference Result 142 states and 154 transitions. [2022-01-31 17:15:39,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 17:15:39,111 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.7241379310344827) internal successors, (79), 28 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 93 [2022-01-31 17:15:39,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:39,112 INFO L225 Difference]: With dead ends: 142 [2022-01-31 17:15:39,112 INFO L226 Difference]: Without dead ends: 101 [2022-01-31 17:15:39,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1134, Invalid=1836, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 17:15:39,113 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 85 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:39,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 54 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:15:39,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-01-31 17:15:39,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2022-01-31 17:15:39,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 94 states have (on average 1.074468085106383) internal successors, (101), 94 states have internal predecessors, (101), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:15:39,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 106 transitions. [2022-01-31 17:15:39,137 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 106 transitions. Word has length 93 [2022-01-31 17:15:39,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:39,137 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 106 transitions. [2022-01-31 17:15:39,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.7241379310344827) internal successors, (79), 28 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 17:15:39,137 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 106 transitions. [2022-01-31 17:15:39,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-01-31 17:15:39,138 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:39,138 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:39,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-01-31 17:15:39,138 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:39,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:39,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1656550715, now seen corresponding path program 26 times [2022-01-31 17:15:39,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:39,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1970907439] [2022-01-31 17:15:39,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:39,141 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:39,141 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:39,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:39,144 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:39,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:39,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:39,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:39,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:15:39,476 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:39,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1970907439] [2022-01-31 17:15:39,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1970907439] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:39,476 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:39,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 17:15:39,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001648869] [2022-01-31 17:15:39,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:39,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 17:15:39,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:39,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 17:15:39,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2022-01-31 17:15:39,477 INFO L87 Difference]: Start difference. First operand 100 states and 106 transitions. Second operand has 30 states, 30 states have (on average 2.7) internal successors, (81), 29 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 17:15:39,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:39,862 INFO L93 Difference]: Finished difference Result 144 states and 156 transitions. [2022-01-31 17:15:39,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 17:15:39,862 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.7) internal successors, (81), 29 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 95 [2022-01-31 17:15:39,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:39,862 INFO L225 Difference]: With dead ends: 144 [2022-01-31 17:15:39,863 INFO L226 Difference]: Without dead ends: 103 [2022-01-31 17:15:39,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1218, Invalid=1974, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 17:15:39,865 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 87 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:39,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 54 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:15:39,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-01-31 17:15:39,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2022-01-31 17:15:39,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 96 states have (on average 1.0729166666666667) internal successors, (103), 96 states have internal predecessors, (103), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:15:39,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 108 transitions. [2022-01-31 17:15:39,873 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 108 transitions. Word has length 95 [2022-01-31 17:15:39,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:39,873 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 108 transitions. [2022-01-31 17:15:39,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.7) internal successors, (81), 29 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 17:15:39,873 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 108 transitions. [2022-01-31 17:15:39,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-01-31 17:15:39,873 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:39,873 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:39,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-01-31 17:15:39,874 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:39,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:39,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1373719719, now seen corresponding path program 27 times [2022-01-31 17:15:39,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:39,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1474694252] [2022-01-31 17:15:39,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:39,876 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:39,876 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:39,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:39,880 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:39,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:40,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:40,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:40,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:15:40,143 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:40,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1474694252] [2022-01-31 17:15:40,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1474694252] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:40,143 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:40,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 17:15:40,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043643758] [2022-01-31 17:15:40,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:40,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 17:15:40,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:40,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 17:15:40,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2022-01-31 17:15:40,145 INFO L87 Difference]: Start difference. First operand 102 states and 108 transitions. Second operand has 31 states, 31 states have (on average 2.6774193548387095) internal successors, (83), 30 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 17:15:40,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:40,555 INFO L93 Difference]: Finished difference Result 146 states and 158 transitions. [2022-01-31 17:15:40,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 17:15:40,555 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6774193548387095) internal successors, (83), 30 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 97 [2022-01-31 17:15:40,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:40,556 INFO L225 Difference]: With dead ends: 146 [2022-01-31 17:15:40,556 INFO L226 Difference]: Without dead ends: 105 [2022-01-31 17:15:40,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1305, Invalid=2117, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 17:15:40,557 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 89 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:40,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 59 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:15:40,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-01-31 17:15:40,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2022-01-31 17:15:40,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 98 states have (on average 1.0714285714285714) internal successors, (105), 98 states have internal predecessors, (105), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:15:40,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 110 transitions. [2022-01-31 17:15:40,566 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 110 transitions. Word has length 97 [2022-01-31 17:15:40,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:40,566 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 110 transitions. [2022-01-31 17:15:40,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.6774193548387095) internal successors, (83), 30 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 17:15:40,566 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 110 transitions. [2022-01-31 17:15:40,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-01-31 17:15:40,596 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:40,596 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:40,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-01-31 17:15:40,597 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:40,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:40,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1475780105, now seen corresponding path program 28 times [2022-01-31 17:15:40,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:40,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1020891574] [2022-01-31 17:15:40,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:40,599 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:40,599 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:40,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:40,602 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:40,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:41,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:41,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:41,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:15:41,010 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:41,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1020891574] [2022-01-31 17:15:41,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1020891574] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:41,010 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:41,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 17:15:41,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658995180] [2022-01-31 17:15:41,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:41,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 17:15:41,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:41,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 17:15:41,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2022-01-31 17:15:41,011 INFO L87 Difference]: Start difference. First operand 104 states and 110 transitions. Second operand has 32 states, 32 states have (on average 2.65625) internal successors, (85), 31 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 17:15:41,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:41,565 INFO L93 Difference]: Finished difference Result 148 states and 160 transitions. [2022-01-31 17:15:41,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 17:15:41,566 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.65625) internal successors, (85), 31 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 99 [2022-01-31 17:15:41,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:41,567 INFO L225 Difference]: With dead ends: 148 [2022-01-31 17:15:41,567 INFO L226 Difference]: Without dead ends: 107 [2022-01-31 17:15:41,568 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 17:15:41,569 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 91 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:41,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 59 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:15:41,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-01-31 17:15:41,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2022-01-31 17:15:41,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 100 states have (on average 1.07) internal successors, (107), 100 states have internal predecessors, (107), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:15:41,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 112 transitions. [2022-01-31 17:15:41,582 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 112 transitions. Word has length 99 [2022-01-31 17:15:41,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:41,582 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 112 transitions. [2022-01-31 17:15:41,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.65625) internal successors, (85), 31 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 17:15:41,583 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 112 transitions. [2022-01-31 17:15:41,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-01-31 17:15:41,583 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:41,583 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:41,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-01-31 17:15:41,583 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:41,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:41,583 INFO L85 PathProgramCache]: Analyzing trace with hash -771563243, now seen corresponding path program 29 times [2022-01-31 17:15:41,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:41,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1211403900] [2022-01-31 17:15:41,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:41,586 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:41,586 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:41,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:41,589 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:41,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:41,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:41,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:41,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:15:41,996 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:41,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1211403900] [2022-01-31 17:15:41,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1211403900] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:41,997 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:41,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 17:15:41,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807864143] [2022-01-31 17:15:41,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:41,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 17:15:41,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:41,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 17:15:41,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 17:15:41,998 INFO L87 Difference]: Start difference. First operand 106 states and 112 transitions. Second operand has 33 states, 33 states have (on average 2.6363636363636362) internal successors, (87), 32 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 17:15:42,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:42,422 INFO L93 Difference]: Finished difference Result 150 states and 162 transitions. [2022-01-31 17:15:42,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 17:15:42,422 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.6363636363636362) internal successors, (87), 32 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 101 [2022-01-31 17:15:42,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:42,423 INFO L225 Difference]: With dead ends: 150 [2022-01-31 17:15:42,423 INFO L226 Difference]: Without dead ends: 109 [2022-01-31 17:15:42,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1488, Invalid=2418, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 17:15:42,424 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 93 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:42,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 69 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:15:42,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-01-31 17:15:42,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2022-01-31 17:15:42,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 102 states have (on average 1.0686274509803921) internal successors, (109), 102 states have internal predecessors, (109), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:15:42,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 114 transitions. [2022-01-31 17:15:42,433 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 114 transitions. Word has length 101 [2022-01-31 17:15:42,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:42,433 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 114 transitions. [2022-01-31 17:15:42,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.6363636363636362) internal successors, (87), 32 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 17:15:42,448 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 114 transitions. [2022-01-31 17:15:42,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-01-31 17:15:42,449 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:42,449 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:42,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-01-31 17:15:42,449 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:42,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:42,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1670975667, now seen corresponding path program 30 times [2022-01-31 17:15:42,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:42,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [532664966] [2022-01-31 17:15:42,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:42,451 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:42,452 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:42,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:42,468 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:42,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:42,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:42,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:42,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:15:42,820 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:42,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [532664966] [2022-01-31 17:15:42,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [532664966] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:42,820 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:42,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 17:15:42,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427118361] [2022-01-31 17:15:42,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:42,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 17:15:42,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:42,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 17:15:42,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 17:15:42,821 INFO L87 Difference]: Start difference. First operand 108 states and 114 transitions. Second operand has 34 states, 34 states have (on average 2.6176470588235294) internal successors, (89), 33 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 17:15:43,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:43,367 INFO L93 Difference]: Finished difference Result 152 states and 164 transitions. [2022-01-31 17:15:43,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 17:15:43,368 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.6176470588235294) internal successors, (89), 33 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 103 [2022-01-31 17:15:43,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:43,368 INFO L225 Difference]: With dead ends: 152 [2022-01-31 17:15:43,368 INFO L226 Difference]: Without dead ends: 111 [2022-01-31 17:15:43,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1584, Invalid=2576, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 17:15:43,370 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 95 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:43,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 64 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:15:43,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-01-31 17:15:43,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2022-01-31 17:15:43,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 104 states have (on average 1.0673076923076923) internal successors, (111), 104 states have internal predecessors, (111), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:15:43,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 116 transitions. [2022-01-31 17:15:43,378 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 116 transitions. Word has length 103 [2022-01-31 17:15:43,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:43,379 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 116 transitions. [2022-01-31 17:15:43,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.6176470588235294) internal successors, (89), 33 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 17:15:43,379 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 116 transitions. [2022-01-31 17:15:43,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-01-31 17:15:43,379 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:43,379 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:43,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-01-31 17:15:43,380 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:43,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:43,380 INFO L85 PathProgramCache]: Analyzing trace with hash -396242735, now seen corresponding path program 31 times [2022-01-31 17:15:43,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:43,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1358869598] [2022-01-31 17:15:43,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:43,381 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:43,382 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:43,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:43,385 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:43,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:43,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:43,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:43,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:15:43,809 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:43,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1358869598] [2022-01-31 17:15:43,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1358869598] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:43,810 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:43,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 17:15:43,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090579848] [2022-01-31 17:15:43,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:43,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 17:15:43,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:43,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 17:15:43,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 17:15:43,811 INFO L87 Difference]: Start difference. First operand 110 states and 116 transitions. Second operand has 35 states, 35 states have (on average 2.6) internal successors, (91), 34 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 17:15:44,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:44,377 INFO L93 Difference]: Finished difference Result 154 states and 166 transitions. [2022-01-31 17:15:44,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 17:15:44,377 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.6) internal successors, (91), 34 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 105 [2022-01-31 17:15:44,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:44,378 INFO L225 Difference]: With dead ends: 154 [2022-01-31 17:15:44,378 INFO L226 Difference]: Without dead ends: 113 [2022-01-31 17:15:44,378 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 17:15:44,378 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 97 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:44,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 54 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:15:44,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-01-31 17:15:44,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2022-01-31 17:15:44,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 106 states have (on average 1.0660377358490567) internal successors, (113), 106 states have internal predecessors, (113), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:15:44,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 118 transitions. [2022-01-31 17:15:44,388 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 118 transitions. Word has length 105 [2022-01-31 17:15:44,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:44,388 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 118 transitions. [2022-01-31 17:15:44,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.6) internal successors, (91), 34 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 17:15:44,388 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 118 transitions. [2022-01-31 17:15:44,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-01-31 17:15:44,388 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:44,388 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:44,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-01-31 17:15:44,389 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:44,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:44,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1576730991, now seen corresponding path program 32 times [2022-01-31 17:15:44,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:44,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [646251833] [2022-01-31 17:15:44,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:44,391 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:44,391 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:44,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:44,394 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:44,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:44,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:44,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:44,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:15:44,835 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:44,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [646251833] [2022-01-31 17:15:44,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [646251833] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:44,835 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:44,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 17:15:44,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488343167] [2022-01-31 17:15:44,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:44,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 17:15:44,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:44,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 17:15:44,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 17:15:44,836 INFO L87 Difference]: Start difference. First operand 112 states and 118 transitions. Second operand has 36 states, 36 states have (on average 2.5833333333333335) internal successors, (93), 35 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 17:15:45,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:45,402 INFO L93 Difference]: Finished difference Result 156 states and 168 transitions. [2022-01-31 17:15:45,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 17:15:45,403 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.5833333333333335) internal successors, (93), 35 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 107 [2022-01-31 17:15:45,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:45,403 INFO L225 Difference]: With dead ends: 156 [2022-01-31 17:15:45,403 INFO L226 Difference]: Without dead ends: 115 [2022-01-31 17:15:45,404 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 17:15:45,404 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 99 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:45,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 49 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:15:45,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-01-31 17:15:45,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2022-01-31 17:15:45,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 108 states have (on average 1.0648148148148149) internal successors, (115), 108 states have internal predecessors, (115), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:15:45,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 120 transitions. [2022-01-31 17:15:45,414 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 120 transitions. Word has length 107 [2022-01-31 17:15:45,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:45,414 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 120 transitions. [2022-01-31 17:15:45,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.5833333333333335) internal successors, (93), 35 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 17:15:45,414 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 120 transitions. [2022-01-31 17:15:45,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-01-31 17:15:45,414 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:45,414 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:45,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-01-31 17:15:45,415 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:45,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:45,415 INFO L85 PathProgramCache]: Analyzing trace with hash -771063155, now seen corresponding path program 33 times [2022-01-31 17:15:45,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:45,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1974580188] [2022-01-31 17:15:45,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:45,417 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:45,417 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:45,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:45,420 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:45,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:45,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:45,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:45,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:15:45,882 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:45,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1974580188] [2022-01-31 17:15:45,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1974580188] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:45,883 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:45,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 17:15:45,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207953811] [2022-01-31 17:15:45,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:45,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 17:15:45,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:45,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 17:15:45,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 17:15:45,884 INFO L87 Difference]: Start difference. First operand 114 states and 120 transitions. Second operand has 37 states, 37 states have (on average 2.5675675675675675) internal successors, (95), 36 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 17:15:46,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:46,398 INFO L93 Difference]: Finished difference Result 158 states and 170 transitions. [2022-01-31 17:15:46,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 17:15:46,398 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.5675675675675675) internal successors, (95), 36 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 109 [2022-01-31 17:15:46,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:46,399 INFO L225 Difference]: With dead ends: 158 [2022-01-31 17:15:46,399 INFO L226 Difference]: Without dead ends: 117 [2022-01-31 17:15:46,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1890, Invalid=3080, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 17:15:46,400 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 101 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:46,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 49 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:15:46,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-01-31 17:15:46,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2022-01-31 17:15:46,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 110 states have (on average 1.0636363636363637) internal successors, (117), 110 states have internal predecessors, (117), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:15:46,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 122 transitions. [2022-01-31 17:15:46,409 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 122 transitions. Word has length 109 [2022-01-31 17:15:46,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:46,409 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 122 transitions. [2022-01-31 17:15:46,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.5675675675675675) internal successors, (95), 36 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 17:15:46,409 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 122 transitions. [2022-01-31 17:15:46,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-01-31 17:15:46,410 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:46,410 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:46,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-01-31 17:15:46,410 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:46,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:46,410 INFO L85 PathProgramCache]: Analyzing trace with hash -2143407061, now seen corresponding path program 34 times [2022-01-31 17:15:46,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:46,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1022295578] [2022-01-31 17:15:46,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:46,412 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:46,412 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:46,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:46,415 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:46,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:46,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:46,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:46,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:15:46,822 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:46,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1022295578] [2022-01-31 17:15:46,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1022295578] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:46,822 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:46,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 17:15:46,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797172386] [2022-01-31 17:15:46,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:46,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 17:15:46,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:46,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 17:15:46,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 17:15:46,823 INFO L87 Difference]: Start difference. First operand 116 states and 122 transitions. Second operand has 38 states, 38 states have (on average 2.5526315789473686) internal successors, (97), 37 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 17:15:47,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:47,315 INFO L93 Difference]: Finished difference Result 160 states and 172 transitions. [2022-01-31 17:15:47,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 17:15:47,315 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.5526315789473686) internal successors, (97), 37 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 111 [2022-01-31 17:15:47,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:47,316 INFO L225 Difference]: With dead ends: 160 [2022-01-31 17:15:47,316 INFO L226 Difference]: Without dead ends: 119 [2022-01-31 17:15:47,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1998, Invalid=3258, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 17:15:47,318 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 103 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:47,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 69 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:15:47,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-01-31 17:15:47,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2022-01-31 17:15:47,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 112 states have (on average 1.0625) internal successors, (119), 112 states have internal predecessors, (119), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:15:47,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 124 transitions. [2022-01-31 17:15:47,338 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 124 transitions. Word has length 111 [2022-01-31 17:15:47,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:47,338 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 124 transitions. [2022-01-31 17:15:47,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.5526315789473686) internal successors, (97), 37 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 17:15:47,339 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 124 transitions. [2022-01-31 17:15:47,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-01-31 17:15:47,339 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:47,339 INFO L514 BasicCegarLoop]: trace histogram [35, 35, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:47,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-01-31 17:15:47,340 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:47,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:47,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1884026441, now seen corresponding path program 35 times [2022-01-31 17:15:47,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:47,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [671162715] [2022-01-31 17:15:47,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:47,343 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:47,343 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:47,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:47,346 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:47,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:47,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:47,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:47,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:15:47,839 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:47,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [671162715] [2022-01-31 17:15:47,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [671162715] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:47,840 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:47,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-01-31 17:15:47,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917007952] [2022-01-31 17:15:47,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:47,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 17:15:47,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:47,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 17:15:47,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 17:15:47,841 INFO L87 Difference]: Start difference. First operand 118 states and 124 transitions. Second operand has 39 states, 39 states have (on average 2.5384615384615383) internal successors, (99), 38 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 17:15:48,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:48,408 INFO L93 Difference]: Finished difference Result 162 states and 174 transitions. [2022-01-31 17:15:48,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 17:15:48,408 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.5384615384615383) internal successors, (99), 38 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 113 [2022-01-31 17:15:48,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:48,410 INFO L225 Difference]: With dead ends: 162 [2022-01-31 17:15:48,417 INFO L226 Difference]: Without dead ends: 121 [2022-01-31 17:15:48,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2109, Invalid=3441, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 17:15:48,423 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 105 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:48,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 69 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:15:48,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-01-31 17:15:48,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2022-01-31 17:15:48,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 114 states have (on average 1.0614035087719298) internal successors, (121), 114 states have internal predecessors, (121), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:15:48,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 126 transitions. [2022-01-31 17:15:48,451 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 126 transitions. Word has length 113 [2022-01-31 17:15:48,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:48,451 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 126 transitions. [2022-01-31 17:15:48,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.5384615384615383) internal successors, (99), 38 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 17:15:48,451 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 126 transitions. [2022-01-31 17:15:48,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-01-31 17:15:48,451 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:48,451 INFO L514 BasicCegarLoop]: trace histogram [36, 36, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:48,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-01-31 17:15:48,452 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:48,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:48,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1812879129, now seen corresponding path program 36 times [2022-01-31 17:15:48,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:48,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [561536217] [2022-01-31 17:15:48,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:48,454 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:48,454 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:48,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:48,457 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:48,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:49,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:49,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:49,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:15:49,048 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:49,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [561536217] [2022-01-31 17:15:49,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [561536217] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:49,048 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:49,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-01-31 17:15:49,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505563850] [2022-01-31 17:15:49,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:49,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 17:15:49,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:49,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 17:15:49,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 17:15:49,050 INFO L87 Difference]: Start difference. First operand 120 states and 126 transitions. Second operand has 40 states, 40 states have (on average 2.525) internal successors, (101), 39 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 17:15:49,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:49,678 INFO L93 Difference]: Finished difference Result 164 states and 176 transitions. [2022-01-31 17:15:49,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 17:15:49,679 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.525) internal successors, (101), 39 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 115 [2022-01-31 17:15:49,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:49,679 INFO L225 Difference]: With dead ends: 164 [2022-01-31 17:15:49,679 INFO L226 Difference]: Without dead ends: 123 [2022-01-31 17:15:49,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2223, Invalid=3629, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 17:15:49,681 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 107 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:49,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 74 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:15:49,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-01-31 17:15:49,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2022-01-31 17:15:49,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 116 states have (on average 1.0603448275862069) internal successors, (123), 116 states have internal predecessors, (123), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:15:49,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 128 transitions. [2022-01-31 17:15:49,710 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 128 transitions. Word has length 115 [2022-01-31 17:15:49,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:49,710 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 128 transitions. [2022-01-31 17:15:49,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.525) internal successors, (101), 39 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 17:15:49,710 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 128 transitions. [2022-01-31 17:15:49,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-01-31 17:15:49,711 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:49,711 INFO L514 BasicCegarLoop]: trace histogram [37, 37, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:49,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-01-31 17:15:49,711 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:49,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:49,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1693789189, now seen corresponding path program 37 times [2022-01-31 17:15:49,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:49,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [73518284] [2022-01-31 17:15:49,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:49,714 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:49,714 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:49,714 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:49,718 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:49,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:50,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:50,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:50,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:15:50,275 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:50,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [73518284] [2022-01-31 17:15:50,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [73518284] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:50,275 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:50,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-01-31 17:15:50,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397783359] [2022-01-31 17:15:50,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:50,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-31 17:15:50,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:50,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-31 17:15:50,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 17:15:50,277 INFO L87 Difference]: Start difference. First operand 122 states and 128 transitions. Second operand has 41 states, 41 states have (on average 2.5121951219512195) internal successors, (103), 40 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 17:15:50,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:50,982 INFO L93 Difference]: Finished difference Result 166 states and 178 transitions. [2022-01-31 17:15:50,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 17:15:50,983 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.5121951219512195) internal successors, (103), 40 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 117 [2022-01-31 17:15:50,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:50,983 INFO L225 Difference]: With dead ends: 166 [2022-01-31 17:15:50,983 INFO L226 Difference]: Without dead ends: 125 [2022-01-31 17:15:50,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2340, Invalid=3822, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 17:15:50,984 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 109 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:50,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 44 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:15:50,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-01-31 17:15:50,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2022-01-31 17:15:50,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 118 states have (on average 1.0593220338983051) internal successors, (125), 118 states have internal predecessors, (125), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:15:50,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 130 transitions. [2022-01-31 17:15:50,996 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 130 transitions. Word has length 117 [2022-01-31 17:15:50,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:50,996 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 130 transitions. [2022-01-31 17:15:50,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.5121951219512195) internal successors, (103), 40 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 17:15:50,996 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 130 transitions. [2022-01-31 17:15:50,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-01-31 17:15:50,996 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:50,997 INFO L514 BasicCegarLoop]: trace histogram [38, 38, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:50,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-01-31 17:15:50,997 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:50,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:50,997 INFO L85 PathProgramCache]: Analyzing trace with hash 52715427, now seen corresponding path program 38 times [2022-01-31 17:15:50,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:50,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1466071714] [2022-01-31 17:15:50,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:51,001 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:51,001 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:51,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:51,008 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:51,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:51,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:51,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:51,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:15:51,501 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:51,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1466071714] [2022-01-31 17:15:51,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1466071714] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:51,501 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:51,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-01-31 17:15:51,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708406471] [2022-01-31 17:15:51,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:51,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 17:15:51,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:51,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 17:15:51,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 17:15:51,502 INFO L87 Difference]: Start difference. First operand 124 states and 130 transitions. Second operand has 42 states, 42 states have (on average 2.5) internal successors, (105), 41 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 17:15:52,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:52,264 INFO L93 Difference]: Finished difference Result 168 states and 180 transitions. [2022-01-31 17:15:52,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-31 17:15:52,264 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.5) internal successors, (105), 41 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 119 [2022-01-31 17:15:52,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:52,264 INFO L225 Difference]: With dead ends: 168 [2022-01-31 17:15:52,264 INFO L226 Difference]: Without dead ends: 127 [2022-01-31 17:15:52,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2460, Invalid=4020, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 17:15:52,265 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 111 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:52,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 64 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:15:52,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-01-31 17:15:52,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2022-01-31 17:15:52,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 120 states have (on average 1.0583333333333333) internal successors, (127), 120 states have internal predecessors, (127), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:15:52,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 132 transitions. [2022-01-31 17:15:52,278 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 132 transitions. Word has length 119 [2022-01-31 17:15:52,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:52,278 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 132 transitions. [2022-01-31 17:15:52,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.5) internal successors, (105), 41 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 17:15:52,278 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 132 transitions. [2022-01-31 17:15:52,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-01-31 17:15:52,278 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:52,278 INFO L514 BasicCegarLoop]: trace histogram [39, 39, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:52,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-01-31 17:15:52,279 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:52,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:52,279 INFO L85 PathProgramCache]: Analyzing trace with hash -766172223, now seen corresponding path program 39 times [2022-01-31 17:15:52,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:52,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1179465133] [2022-01-31 17:15:52,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:52,281 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:52,281 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:52,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:52,285 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:52,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:52,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:52,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:52,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:15:52,916 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:52,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1179465133] [2022-01-31 17:15:52,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1179465133] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:52,916 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:52,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-01-31 17:15:52,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930541015] [2022-01-31 17:15:52,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:52,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-31 17:15:52,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:52,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-31 17:15:52,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 17:15:52,918 INFO L87 Difference]: Start difference. First operand 126 states and 132 transitions. Second operand has 43 states, 43 states have (on average 2.488372093023256) internal successors, (107), 42 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 17:15:53,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:53,740 INFO L93 Difference]: Finished difference Result 170 states and 182 transitions. [2022-01-31 17:15:53,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-31 17:15:53,742 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.488372093023256) internal successors, (107), 42 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 121 [2022-01-31 17:15:53,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:53,743 INFO L225 Difference]: With dead ends: 170 [2022-01-31 17:15:53,743 INFO L226 Difference]: Without dead ends: 129 [2022-01-31 17:15:53,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2583, Invalid=4223, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 17:15:53,744 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 113 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:53,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 64 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:15:53,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-01-31 17:15:53,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2022-01-31 17:15:53,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 122 states have (on average 1.0573770491803278) internal successors, (129), 122 states have internal predecessors, (129), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:15:53,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 134 transitions. [2022-01-31 17:15:53,757 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 134 transitions. Word has length 121 [2022-01-31 17:15:53,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:53,757 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 134 transitions. [2022-01-31 17:15:53,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.488372093023256) internal successors, (107), 42 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 17:15:53,757 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 134 transitions. [2022-01-31 17:15:53,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-01-31 17:15:53,758 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:53,758 INFO L514 BasicCegarLoop]: trace histogram [40, 40, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:53,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-01-31 17:15:53,758 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:53,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:53,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1738188705, now seen corresponding path program 40 times [2022-01-31 17:15:53,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:53,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2113675794] [2022-01-31 17:15:53,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:53,760 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:53,760 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:53,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:53,764 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:53,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:54,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:54,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:54,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:15:54,434 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:54,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2113675794] [2022-01-31 17:15:54,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2113675794] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:54,435 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:54,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-01-31 17:15:54,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266435591] [2022-01-31 17:15:54,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:54,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 17:15:54,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:54,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 17:15:54,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 17:15:54,436 INFO L87 Difference]: Start difference. First operand 128 states and 134 transitions. Second operand has 44 states, 44 states have (on average 2.477272727272727) internal successors, (109), 43 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 17:15:55,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:55,344 INFO L93 Difference]: Finished difference Result 172 states and 184 transitions. [2022-01-31 17:15:55,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-31 17:15:55,344 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.477272727272727) internal successors, (109), 43 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 123 [2022-01-31 17:15:55,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:55,345 INFO L225 Difference]: With dead ends: 172 [2022-01-31 17:15:55,345 INFO L226 Difference]: Without dead ends: 131 [2022-01-31 17:15:55,347 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 17:15:55,347 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 115 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:55,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 64 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:15:55,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-01-31 17:15:55,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2022-01-31 17:15:55,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 124 states have (on average 1.0564516129032258) internal successors, (131), 124 states have internal predecessors, (131), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:15:55,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 136 transitions. [2022-01-31 17:15:55,369 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 136 transitions. Word has length 123 [2022-01-31 17:15:55,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:55,369 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 136 transitions. [2022-01-31 17:15:55,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.477272727272727) internal successors, (109), 43 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 17:15:55,369 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 136 transitions. [2022-01-31 17:15:55,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-01-31 17:15:55,370 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:55,370 INFO L514 BasicCegarLoop]: trace histogram [41, 41, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:55,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-01-31 17:15:55,374 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:55,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:55,374 INFO L85 PathProgramCache]: Analyzing trace with hash 456842621, now seen corresponding path program 41 times [2022-01-31 17:15:55,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:55,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1929343195] [2022-01-31 17:15:55,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:55,376 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:55,376 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:55,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:55,381 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:55,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:55,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:55,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:55,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:15:55,960 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:55,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1929343195] [2022-01-31 17:15:55,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1929343195] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:55,961 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:55,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-01-31 17:15:55,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532749772] [2022-01-31 17:15:55,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:55,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-31 17:15:55,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:55,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-31 17:15:55,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 17:15:55,962 INFO L87 Difference]: Start difference. First operand 130 states and 136 transitions. Second operand has 45 states, 45 states have (on average 2.466666666666667) internal successors, (111), 44 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 17:15:56,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:56,804 INFO L93 Difference]: Finished difference Result 174 states and 186 transitions. [2022-01-31 17:15:56,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 17:15:56,810 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.466666666666667) internal successors, (111), 44 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 125 [2022-01-31 17:15:56,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:56,810 INFO L225 Difference]: With dead ends: 174 [2022-01-31 17:15:56,810 INFO L226 Difference]: Without dead ends: 133 [2022-01-31 17:15:56,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2838, Invalid=4644, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 17:15:56,821 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 117 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:56,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 64 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:15:56,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-01-31 17:15:56,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2022-01-31 17:15:56,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 126 states have (on average 1.0555555555555556) internal successors, (133), 126 states have internal predecessors, (133), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:15:56,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 138 transitions. [2022-01-31 17:15:56,835 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 138 transitions. Word has length 125 [2022-01-31 17:15:56,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:56,843 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 138 transitions. [2022-01-31 17:15:56,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.466666666666667) internal successors, (111), 44 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 17:15:56,846 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 138 transitions. [2022-01-31 17:15:56,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-01-31 17:15:56,847 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:56,847 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:56,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-01-31 17:15:56,847 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:56,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:56,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1053004571, now seen corresponding path program 42 times [2022-01-31 17:15:56,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:56,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1413534229] [2022-01-31 17:15:56,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:56,849 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:56,849 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:56,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:56,854 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:56,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:57,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:57,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:57,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:15:57,533 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:57,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1413534229] [2022-01-31 17:15:57,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1413534229] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:57,533 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:57,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-01-31 17:15:57,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243111867] [2022-01-31 17:15:57,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:57,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-31 17:15:57,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:57,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-31 17:15:57,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 17:15:57,534 INFO L87 Difference]: Start difference. First operand 132 states and 138 transitions. Second operand has 46 states, 46 states have (on average 2.4565217391304346) internal successors, (113), 45 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 17:15:58,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:58,286 INFO L93 Difference]: Finished difference Result 176 states and 188 transitions. [2022-01-31 17:15:58,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 17:15:58,286 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.4565217391304346) internal successors, (113), 45 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 127 [2022-01-31 17:15:58,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:58,287 INFO L225 Difference]: With dead ends: 176 [2022-01-31 17:15:58,287 INFO L226 Difference]: Without dead ends: 135 [2022-01-31 17:15:58,288 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 17:15:58,288 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 119 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:58,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 54 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:15:58,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-01-31 17:15:58,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2022-01-31 17:15:58,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 128 states have (on average 1.0546875) internal successors, (135), 128 states have internal predecessors, (135), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:15:58,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 140 transitions. [2022-01-31 17:15:58,308 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 140 transitions. Word has length 127 [2022-01-31 17:15:58,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:58,308 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 140 transitions. [2022-01-31 17:15:58,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.4565217391304346) internal successors, (113), 45 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 17:15:58,308 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 140 transitions. [2022-01-31 17:15:58,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-01-31 17:15:58,308 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:58,308 INFO L514 BasicCegarLoop]: trace histogram [43, 43, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:58,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-01-31 17:15:58,309 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:58,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:58,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1560979143, now seen corresponding path program 43 times [2022-01-31 17:15:58,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:58,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1068088632] [2022-01-31 17:15:58,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:58,312 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:58,313 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:58,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:58,317 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:58,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:59,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:59,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:59,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:15:59,144 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:59,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1068088632] [2022-01-31 17:15:59,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1068088632] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:59,144 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:59,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-01-31 17:15:59,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074645253] [2022-01-31 17:15:59,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:59,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-31 17:15:59,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:59,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-31 17:15:59,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 17:15:59,145 INFO L87 Difference]: Start difference. First operand 134 states and 140 transitions. Second operand has 47 states, 47 states have (on average 2.4468085106382977) internal successors, (115), 46 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 17:15:59,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:59,863 INFO L93 Difference]: Finished difference Result 178 states and 190 transitions. [2022-01-31 17:15:59,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-31 17:15:59,863 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.4468085106382977) internal successors, (115), 46 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 129 [2022-01-31 17:15:59,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:59,864 INFO L225 Difference]: With dead ends: 178 [2022-01-31 17:15:59,864 INFO L226 Difference]: Without dead ends: 137 [2022-01-31 17:15:59,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3105, Invalid=5085, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 17:15:59,866 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 121 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:59,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 54 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:15:59,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-01-31 17:15:59,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2022-01-31 17:15:59,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 130 states have (on average 1.0538461538461539) internal successors, (137), 130 states have internal predecessors, (137), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:15:59,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 142 transitions. [2022-01-31 17:15:59,894 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 142 transitions. Word has length 129 [2022-01-31 17:15:59,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:59,894 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 142 transitions. [2022-01-31 17:15:59,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.4468085106382977) internal successors, (115), 46 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 17:15:59,894 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 142 transitions. [2022-01-31 17:15:59,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-01-31 17:15:59,895 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:59,895 INFO L514 BasicCegarLoop]: trace histogram [44, 44, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:59,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-01-31 17:15:59,895 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:59,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:59,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1043460137, now seen corresponding path program 44 times [2022-01-31 17:15:59,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:59,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [173623512] [2022-01-31 17:15:59,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:59,899 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:59,899 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:59,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:59,904 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:59,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:00,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:16:00,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:00,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:16:00,717 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:16:00,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [173623512] [2022-01-31 17:16:00,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [173623512] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:16:00,718 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:16:00,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-01-31 17:16:00,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614099935] [2022-01-31 17:16:00,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:16:00,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-31 17:16:00,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:16:00,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-31 17:16:00,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 17:16:00,719 INFO L87 Difference]: Start difference. First operand 136 states and 142 transitions. Second operand has 48 states, 48 states have (on average 2.4375) internal successors, (117), 47 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 17:16:01,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:16:01,441 INFO L93 Difference]: Finished difference Result 180 states and 192 transitions. [2022-01-31 17:16:01,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 17:16:01,442 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.4375) internal successors, (117), 47 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 131 [2022-01-31 17:16:01,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:16:01,442 INFO L225 Difference]: With dead ends: 180 [2022-01-31 17:16:01,442 INFO L226 Difference]: Without dead ends: 139 [2022-01-31 17:16:01,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3243, Invalid=5313, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 17:16:01,444 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 123 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:16:01,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 59 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:16:01,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-01-31 17:16:01,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2022-01-31 17:16:01,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 132 states have (on average 1.053030303030303) internal successors, (139), 132 states have internal predecessors, (139), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:16:01,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 144 transitions. [2022-01-31 17:16:01,463 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 144 transitions. Word has length 131 [2022-01-31 17:16:01,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:16:01,463 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 144 transitions. [2022-01-31 17:16:01,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.4375) internal successors, (117), 47 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 17:16:01,463 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 144 transitions. [2022-01-31 17:16:01,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-01-31 17:16:01,463 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:16:01,463 INFO L514 BasicCegarLoop]: trace histogram [45, 45, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:16:01,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-01-31 17:16:01,464 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:16:01,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:16:01,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1923901707, now seen corresponding path program 45 times [2022-01-31 17:16:01,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:16:01,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1131460706] [2022-01-31 17:16:01,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:16:01,465 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:16:01,466 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:16:01,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:16:01,469 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:16:01,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:02,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:16:02,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:02,271 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 17:16:02,272 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:16:02,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1131460706] [2022-01-31 17:16:02,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1131460706] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:16:02,272 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:16:02,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-01-31 17:16:02,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090136294] [2022-01-31 17:16:02,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:16:02,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-31 17:16:02,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:16:02,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-31 17:16:02,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 17:16:02,273 INFO L87 Difference]: Start difference. First operand 138 states and 144 transitions. Second operand has 49 states, 49 states have (on average 2.4285714285714284) internal successors, (119), 48 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 17:16:03,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:16:03,135 INFO L93 Difference]: Finished difference Result 182 states and 194 transitions. [2022-01-31 17:16:03,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 17:16:03,135 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.4285714285714284) internal successors, (119), 48 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 133 [2022-01-31 17:16:03,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:16:03,136 INFO L225 Difference]: With dead ends: 182 [2022-01-31 17:16:03,136 INFO L226 Difference]: Without dead ends: 141 [2022-01-31 17:16:03,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3384, Invalid=5546, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 17:16:03,137 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 125 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:16:03,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 59 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:16:03,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-01-31 17:16:03,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2022-01-31 17:16:03,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 134 states have (on average 1.0522388059701493) internal successors, (141), 134 states have internal predecessors, (141), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:16:03,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 146 transitions. [2022-01-31 17:16:03,152 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 146 transitions. Word has length 133 [2022-01-31 17:16:03,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:16:03,153 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 146 transitions. [2022-01-31 17:16:03,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.4285714285714284) internal successors, (119), 48 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 17:16:03,153 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 146 transitions. [2022-01-31 17:16:03,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-01-31 17:16:03,155 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:16:03,155 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:16:03,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-01-31 17:16:03,156 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:16:03,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:16:03,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1919693165, now seen corresponding path program 46 times [2022-01-31 17:16:03,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:16:03,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [604346137] [2022-01-31 17:16:03,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:16:03,162 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:16:03,162 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:16:03,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:16:03,167 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:16:03,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:03,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:16:03,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:03,936 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 17:16:03,936 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:16:03,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [604346137] [2022-01-31 17:16:03,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [604346137] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:16:03,936 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:16:03,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-01-31 17:16:03,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088570940] [2022-01-31 17:16:03,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:16:03,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 17:16:03,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:16:03,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 17:16:03,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 17:16:03,937 INFO L87 Difference]: Start difference. First operand 140 states and 146 transitions. Second operand has 50 states, 50 states have (on average 2.42) internal successors, (121), 49 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 17:16:04,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:16:04,673 INFO L93 Difference]: Finished difference Result 184 states and 196 transitions. [2022-01-31 17:16:04,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-31 17:16:04,674 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.42) internal successors, (121), 49 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 135 [2022-01-31 17:16:04,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:16:04,675 INFO L225 Difference]: With dead ends: 184 [2022-01-31 17:16:04,675 INFO L226 Difference]: Without dead ends: 143 [2022-01-31 17:16:04,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3528, Invalid=5784, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 17:16:04,676 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 127 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:16:04,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 69 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:16:04,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-01-31 17:16:04,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2022-01-31 17:16:04,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 136 states have (on average 1.0514705882352942) internal successors, (143), 136 states have internal predecessors, (143), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:16:04,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 148 transitions. [2022-01-31 17:16:04,729 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 148 transitions. Word has length 135 [2022-01-31 17:16:04,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:16:04,729 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 148 transitions. [2022-01-31 17:16:04,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.42) internal successors, (121), 49 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 17:16:04,729 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 148 transitions. [2022-01-31 17:16:04,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-01-31 17:16:04,729 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:16:04,730 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:16:04,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-01-31 17:16:04,730 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:16:04,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:16:04,730 INFO L85 PathProgramCache]: Analyzing trace with hash 2124715697, now seen corresponding path program 47 times [2022-01-31 17:16:04,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:16:04,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [668057761] [2022-01-31 17:16:04,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:16:04,732 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:16:04,732 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:16:04,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:16:04,736 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:16:04,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:05,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:16:05,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:05,551 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 17:16:05,551 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:16:05,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [668057761] [2022-01-31 17:16:05,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [668057761] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:16:05,551 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:16:05,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-01-31 17:16:05,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702640626] [2022-01-31 17:16:05,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:16:05,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-31 17:16:05,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:16:05,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-31 17:16:05,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 17:16:05,552 INFO L87 Difference]: Start difference. First operand 142 states and 148 transitions. Second operand has 51 states, 51 states have (on average 2.411764705882353) internal successors, (123), 50 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 17:16:06,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:16:06,351 INFO L93 Difference]: Finished difference Result 186 states and 198 transitions. [2022-01-31 17:16:06,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 17:16:06,352 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.411764705882353) internal successors, (123), 50 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 137 [2022-01-31 17:16:06,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:16:06,353 INFO L225 Difference]: With dead ends: 186 [2022-01-31 17:16:06,353 INFO L226 Difference]: Without dead ends: 145 [2022-01-31 17:16:06,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3675, Invalid=6027, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 17:16:06,356 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 129 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:16:06,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 64 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:16:06,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-01-31 17:16:06,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 144. [2022-01-31 17:16:06,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 138 states have (on average 1.0507246376811594) internal successors, (145), 138 states have internal predecessors, (145), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:16:06,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 150 transitions. [2022-01-31 17:16:06,373 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 150 transitions. Word has length 137 [2022-01-31 17:16:06,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:16:06,373 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 150 transitions. [2022-01-31 17:16:06,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.411764705882353) internal successors, (123), 50 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 17:16:06,374 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 150 transitions. [2022-01-31 17:16:06,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-01-31 17:16:06,374 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:16:06,374 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:16:06,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-01-31 17:16:06,374 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:16:06,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:16:06,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1856229199, now seen corresponding path program 48 times [2022-01-31 17:16:06,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:16:06,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [383649457] [2022-01-31 17:16:06,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:16:06,377 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:16:06,377 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:16:06,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:16:06,383 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:16:06,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:07,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:16:07,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:07,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:16:07,304 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:16:07,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [383649457] [2022-01-31 17:16:07,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [383649457] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:16:07,304 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:16:07,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-01-31 17:16:07,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469925289] [2022-01-31 17:16:07,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:16:07,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-01-31 17:16:07,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:16:07,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-01-31 17:16:07,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 17:16:07,306 INFO L87 Difference]: Start difference. First operand 144 states and 150 transitions. Second operand has 52 states, 52 states have (on average 2.4038461538461537) internal successors, (125), 51 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 17:16:08,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:16:08,169 INFO L93 Difference]: Finished difference Result 188 states and 200 transitions. [2022-01-31 17:16:08,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-31 17:16:08,170 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.4038461538461537) internal successors, (125), 51 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 139 [2022-01-31 17:16:08,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:16:08,171 INFO L225 Difference]: With dead ends: 188 [2022-01-31 17:16:08,171 INFO L226 Difference]: Without dead ends: 147 [2022-01-31 17:16:08,173 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 17:16:08,173 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 131 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:16:08,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 69 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:16:08,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-01-31 17:16:08,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 146. [2022-01-31 17:16:08,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 140 states have (on average 1.05) internal successors, (147), 140 states have internal predecessors, (147), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:16:08,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 152 transitions. [2022-01-31 17:16:08,191 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 152 transitions. Word has length 139 [2022-01-31 17:16:08,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:16:08,191 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 152 transitions. [2022-01-31 17:16:08,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.4038461538461537) internal successors, (125), 51 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 17:16:08,191 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 152 transitions. [2022-01-31 17:16:08,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-01-31 17:16:08,192 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:16:08,192 INFO L514 BasicCegarLoop]: trace histogram [49, 49, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:16:08,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-01-31 17:16:08,192 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:16:08,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:16:08,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1538742381, now seen corresponding path program 49 times [2022-01-31 17:16:08,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:16:08,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1985856608] [2022-01-31 17:16:08,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:16:08,194 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:16:08,194 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:16:08,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:16:08,199 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:16:08,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:08,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:16:08,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:08,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:16:08,853 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:16:08,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1985856608] [2022-01-31 17:16:08,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1985856608] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:16:08,853 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:16:08,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-01-31 17:16:08,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580546868] [2022-01-31 17:16:08,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:16:08,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-31 17:16:08,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:16:08,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-31 17:16:08,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 17:16:08,855 INFO L87 Difference]: Start difference. First operand 146 states and 152 transitions. Second operand has 53 states, 53 states have (on average 2.3962264150943398) internal successors, (127), 52 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 17:16:09,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:16:09,839 INFO L93 Difference]: Finished difference Result 190 states and 202 transitions. [2022-01-31 17:16:09,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-31 17:16:09,840 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.3962264150943398) internal successors, (127), 52 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 141 [2022-01-31 17:16:09,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:16:09,841 INFO L225 Difference]: With dead ends: 190 [2022-01-31 17:16:09,841 INFO L226 Difference]: Without dead ends: 149 [2022-01-31 17:16:09,842 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 17:16:09,842 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 133 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:16:09,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 59 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:16:09,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-01-31 17:16:09,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 148. [2022-01-31 17:16:09,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 142 states have (on average 1.0492957746478873) internal successors, (149), 142 states have internal predecessors, (149), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:16:09,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 154 transitions. [2022-01-31 17:16:09,862 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 154 transitions. Word has length 141 [2022-01-31 17:16:09,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:16:09,862 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 154 transitions. [2022-01-31 17:16:09,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.3962264150943398) internal successors, (127), 52 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 17:16:09,862 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 154 transitions. [2022-01-31 17:16:09,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-01-31 17:16:09,862 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:16:09,862 INFO L514 BasicCegarLoop]: trace histogram [50, 50, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:16:09,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-01-31 17:16:09,863 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:16:09,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:16:09,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1376588299, now seen corresponding path program 50 times [2022-01-31 17:16:09,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:16:09,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2114157804] [2022-01-31 17:16:09,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:16:09,865 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:16:09,865 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:16:09,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:16:09,870 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:16:09,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:10,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:16:10,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:10,784 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 17:16:10,784 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:16:10,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2114157804] [2022-01-31 17:16:10,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2114157804] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:16:10,785 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:16:10,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-01-31 17:16:10,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754040161] [2022-01-31 17:16:10,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:16:10,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-01-31 17:16:10,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:16:10,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-01-31 17:16:10,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 17:16:10,786 INFO L87 Difference]: Start difference. First operand 148 states and 154 transitions. Second operand has 54 states, 54 states have (on average 2.388888888888889) internal successors, (129), 53 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 17:16:11,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:16:11,885 INFO L93 Difference]: Finished difference Result 192 states and 204 transitions. [2022-01-31 17:16:11,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-31 17:16:11,885 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.388888888888889) internal successors, (129), 53 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 143 [2022-01-31 17:16:11,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:16:11,886 INFO L225 Difference]: With dead ends: 192 [2022-01-31 17:16:11,886 INFO L226 Difference]: Without dead ends: 151 [2022-01-31 17:16:11,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1325 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4134, Invalid=6786, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 17:16:11,887 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 135 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:16:11,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 64 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:16:11,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-01-31 17:16:11,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 150. [2022-01-31 17:16:11,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 144 states have (on average 1.0486111111111112) internal successors, (151), 144 states have internal predecessors, (151), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:16:11,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 156 transitions. [2022-01-31 17:16:11,905 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 156 transitions. Word has length 143 [2022-01-31 17:16:11,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:16:11,905 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 156 transitions. [2022-01-31 17:16:11,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.388888888888889) internal successors, (129), 53 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 17:16:11,905 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 156 transitions. [2022-01-31 17:16:11,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-01-31 17:16:11,905 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:16:11,905 INFO L514 BasicCegarLoop]: trace histogram [51, 51, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:16:11,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-01-31 17:16:11,906 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:16:11,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:16:11,906 INFO L85 PathProgramCache]: Analyzing trace with hash 165338153, now seen corresponding path program 51 times [2022-01-31 17:16:11,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:16:11,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2013181700] [2022-01-31 17:16:11,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:16:11,907 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:16:11,907 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:16:11,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:16:11,912 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:16:11,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:12,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:16:12,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:12,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:16:12,600 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:16:12,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2013181700] [2022-01-31 17:16:12,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2013181700] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:16:12,600 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:16:12,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-01-31 17:16:12,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981588985] [2022-01-31 17:16:12,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:16:12,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-01-31 17:16:12,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:16:12,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-01-31 17:16:12,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 17:16:12,602 INFO L87 Difference]: Start difference. First operand 150 states and 156 transitions. Second operand has 55 states, 55 states have (on average 2.381818181818182) internal successors, (131), 54 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 17:16:13,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:16:13,697 INFO L93 Difference]: Finished difference Result 194 states and 206 transitions. [2022-01-31 17:16:13,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-31 17:16:13,698 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.381818181818182) internal successors, (131), 54 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 145 [2022-01-31 17:16:13,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:16:13,698 INFO L225 Difference]: With dead ends: 194 [2022-01-31 17:16:13,698 INFO L226 Difference]: Without dead ends: 153 [2022-01-31 17:16:13,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=4293, Invalid=7049, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 17:16:13,700 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 137 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:16:13,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 69 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:16:13,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-01-31 17:16:13,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 152. [2022-01-31 17:16:13,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 146 states have (on average 1.047945205479452) internal successors, (153), 146 states have internal predecessors, (153), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:16:13,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 158 transitions. [2022-01-31 17:16:13,723 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 158 transitions. Word has length 145 [2022-01-31 17:16:13,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:16:13,723 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 158 transitions. [2022-01-31 17:16:13,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.381818181818182) internal successors, (131), 54 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 17:16:13,723 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 158 transitions. [2022-01-31 17:16:13,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-01-31 17:16:13,724 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:16:13,724 INFO L514 BasicCegarLoop]: trace histogram [52, 52, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:16:13,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-01-31 17:16:13,724 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:16:13,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:16:13,724 INFO L85 PathProgramCache]: Analyzing trace with hash 90085063, now seen corresponding path program 52 times [2022-01-31 17:16:13,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:16:13,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [508919164] [2022-01-31 17:16:13,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:16:13,726 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:16:13,726 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:16:13,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:16:13,731 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:16:13,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:14,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:16:14,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:14,653 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 17:16:14,653 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:16:14,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [508919164] [2022-01-31 17:16:14,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [508919164] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:16:14,653 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:16:14,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-01-31 17:16:14,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197963973] [2022-01-31 17:16:14,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:16:14,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-31 17:16:14,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:16:14,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-31 17:16:14,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 17:16:14,655 INFO L87 Difference]: Start difference. First operand 152 states and 158 transitions. Second operand has 56 states, 56 states have (on average 2.375) internal successors, (133), 55 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 17:16:15,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:16:15,446 INFO L93 Difference]: Finished difference Result 196 states and 208 transitions. [2022-01-31 17:16:15,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-31 17:16:15,447 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.375) internal successors, (133), 55 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 147 [2022-01-31 17:16:15,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:16:15,447 INFO L225 Difference]: With dead ends: 196 [2022-01-31 17:16:15,447 INFO L226 Difference]: Without dead ends: 155 [2022-01-31 17:16:15,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=4455, Invalid=7317, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 17:16:15,450 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 139 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:16:15,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 54 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:16:15,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-01-31 17:16:15,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 154. [2022-01-31 17:16:15,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 148 states have (on average 1.0472972972972974) internal successors, (155), 148 states have internal predecessors, (155), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:16:15,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 160 transitions. [2022-01-31 17:16:15,477 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 160 transitions. Word has length 147 [2022-01-31 17:16:15,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:16:15,477 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 160 transitions. [2022-01-31 17:16:15,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.375) internal successors, (133), 55 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 17:16:15,477 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 160 transitions. [2022-01-31 17:16:15,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-01-31 17:16:15,477 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:16:15,477 INFO L514 BasicCegarLoop]: trace histogram [53, 53, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:16:15,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-01-31 17:16:15,478 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:16:15,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:16:15,478 INFO L85 PathProgramCache]: Analyzing trace with hash 786309605, now seen corresponding path program 53 times [2022-01-31 17:16:15,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:16:15,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1449326723] [2022-01-31 17:16:15,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:16:15,479 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:16:15,479 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:16:15,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:16:15,485 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:16:15,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:16,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:16:16,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:16,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:16:16,579 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:16:16,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1449326723] [2022-01-31 17:16:16,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1449326723] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:16:16,579 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:16:16,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-01-31 17:16:16,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820632993] [2022-01-31 17:16:16,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:16:16,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-01-31 17:16:16,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:16:16,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-01-31 17:16:16,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 17:16:16,580 INFO L87 Difference]: Start difference. First operand 154 states and 160 transitions. Second operand has 57 states, 57 states have (on average 2.3684210526315788) internal successors, (135), 56 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 17:16:17,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:16:17,614 INFO L93 Difference]: Finished difference Result 198 states and 210 transitions. [2022-01-31 17:16:17,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 17:16:17,615 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.3684210526315788) internal successors, (135), 56 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 149 [2022-01-31 17:16:17,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:16:17,615 INFO L225 Difference]: With dead ends: 198 [2022-01-31 17:16:17,615 INFO L226 Difference]: Without dead ends: 157 [2022-01-31 17:16:17,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1484 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4620, Invalid=7590, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 17:16:17,617 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 141 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:16:17,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 59 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:16:17,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-01-31 17:16:17,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 156. [2022-01-31 17:16:17,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 150 states have (on average 1.0466666666666666) internal successors, (157), 150 states have internal predecessors, (157), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:16:17,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 162 transitions. [2022-01-31 17:16:17,637 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 162 transitions. Word has length 149 [2022-01-31 17:16:17,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:16:17,637 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 162 transitions. [2022-01-31 17:16:17,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.3684210526315788) internal successors, (135), 56 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 17:16:17,637 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 162 transitions. [2022-01-31 17:16:17,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-01-31 17:16:17,637 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:16:17,638 INFO L514 BasicCegarLoop]: trace histogram [54, 54, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:16:17,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-01-31 17:16:17,638 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:16:17,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:16:17,638 INFO L85 PathProgramCache]: Analyzing trace with hash -156803709, now seen corresponding path program 54 times [2022-01-31 17:16:17,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:16:17,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1233866363] [2022-01-31 17:16:17,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:16:17,639 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:16:17,639 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:16:17,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:16:17,645 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:16:17,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:18,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:16:18,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:18,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:16:18,736 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:16:18,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1233866363] [2022-01-31 17:16:18,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1233866363] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:16:18,736 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:16:18,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-01-31 17:16:18,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86595154] [2022-01-31 17:16:18,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:16:18,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-01-31 17:16:18,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:16:18,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-01-31 17:16:18,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 17:16:18,738 INFO L87 Difference]: Start difference. First operand 156 states and 162 transitions. Second operand has 58 states, 58 states have (on average 2.3620689655172415) internal successors, (137), 57 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 17:16:19,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:16:19,715 INFO L93 Difference]: Finished difference Result 200 states and 212 transitions. [2022-01-31 17:16:19,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-31 17:16:19,715 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.3620689655172415) internal successors, (137), 57 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 151 [2022-01-31 17:16:19,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:16:19,716 INFO L225 Difference]: With dead ends: 200 [2022-01-31 17:16:19,716 INFO L226 Difference]: Without dead ends: 159 [2022-01-31 17:16:19,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4788, Invalid=7868, Unknown=0, NotChecked=0, Total=12656 [2022-01-31 17:16:19,717 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 143 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:16:19,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 74 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:16:19,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-01-31 17:16:19,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 158. [2022-01-31 17:16:19,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 152 states have (on average 1.0460526315789473) internal successors, (159), 152 states have internal predecessors, (159), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:16:19,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 164 transitions. [2022-01-31 17:16:19,738 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 164 transitions. Word has length 151 [2022-01-31 17:16:19,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:16:19,738 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 164 transitions. [2022-01-31 17:16:19,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.3620689655172415) internal successors, (137), 57 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 17:16:19,739 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 164 transitions. [2022-01-31 17:16:19,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-01-31 17:16:19,739 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:16:19,739 INFO L514 BasicCegarLoop]: trace histogram [55, 55, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:16:19,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-01-31 17:16:19,739 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:16:19,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:16:19,740 INFO L85 PathProgramCache]: Analyzing trace with hash -250599007, now seen corresponding path program 55 times [2022-01-31 17:16:19,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:16:19,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1184043924] [2022-01-31 17:16:19,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:16:19,741 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:16:19,742 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:16:19,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:16:19,747 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:16:19,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:20,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:16:20,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:20,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:16:20,858 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:16:20,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1184043924] [2022-01-31 17:16:20,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1184043924] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:16:20,858 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:16:20,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-01-31 17:16:20,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224819675] [2022-01-31 17:16:20,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:16:20,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-01-31 17:16:20,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:16:20,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-01-31 17:16:20,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 17:16:20,859 INFO L87 Difference]: Start difference. First operand 158 states and 164 transitions. Second operand has 59 states, 59 states have (on average 2.3559322033898304) internal successors, (139), 58 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 17:16:21,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:16:21,887 INFO L93 Difference]: Finished difference Result 202 states and 214 transitions. [2022-01-31 17:16:21,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-31 17:16:21,887 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.3559322033898304) internal successors, (139), 58 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 153 [2022-01-31 17:16:21,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:16:21,888 INFO L225 Difference]: With dead ends: 202 [2022-01-31 17:16:21,888 INFO L226 Difference]: Without dead ends: 161 [2022-01-31 17:16:21,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4959, Invalid=8151, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 17:16:21,889 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 145 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:16:21,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 59 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:16:21,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-01-31 17:16:21,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2022-01-31 17:16:21,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 154 states have (on average 1.0454545454545454) internal successors, (161), 154 states have internal predecessors, (161), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:16:21,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 166 transitions. [2022-01-31 17:16:21,910 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 166 transitions. Word has length 153 [2022-01-31 17:16:21,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:16:21,910 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 166 transitions. [2022-01-31 17:16:21,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.3559322033898304) internal successors, (139), 58 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 17:16:21,910 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 166 transitions. [2022-01-31 17:16:21,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-01-31 17:16:21,911 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:16:21,911 INFO L514 BasicCegarLoop]: trace histogram [56, 56, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:16:21,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-01-31 17:16:21,911 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:16:21,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:16:21,911 INFO L85 PathProgramCache]: Analyzing trace with hash -193567169, now seen corresponding path program 56 times [2022-01-31 17:16:21,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:16:21,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1447461109] [2022-01-31 17:16:21,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:16:21,913 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:16:21,913 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:16:21,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:16:21,918 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:16:21,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:23,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:16:23,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:23,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:16:23,083 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:16:23,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1447461109] [2022-01-31 17:16:23,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1447461109] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:16:23,083 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:16:23,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-01-31 17:16:23,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820845104] [2022-01-31 17:16:23,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:16:23,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-01-31 17:16:23,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:16:23,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-01-31 17:16:23,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 17:16:23,084 INFO L87 Difference]: Start difference. First operand 160 states and 166 transitions. Second operand has 60 states, 60 states have (on average 2.35) internal successors, (141), 59 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 17:16:24,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:16:24,538 INFO L93 Difference]: Finished difference Result 204 states and 216 transitions. [2022-01-31 17:16:24,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-31 17:16:24,538 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.35) internal successors, (141), 59 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 155 [2022-01-31 17:16:24,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:16:24,538 INFO L225 Difference]: With dead ends: 204 [2022-01-31 17:16:24,538 INFO L226 Difference]: Without dead ends: 163 [2022-01-31 17:16:24,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1652 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=5133, Invalid=8439, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 17:16:24,540 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 147 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:16:24,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 64 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:16:24,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-01-31 17:16:24,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2022-01-31 17:16:24,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 156 states have (on average 1.044871794871795) internal successors, (163), 156 states have internal predecessors, (163), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:16:24,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 168 transitions. [2022-01-31 17:16:24,562 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 168 transitions. Word has length 155 [2022-01-31 17:16:24,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:16:24,562 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 168 transitions. [2022-01-31 17:16:24,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.35) internal successors, (141), 59 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 17:16:24,563 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 168 transitions. [2022-01-31 17:16:24,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-01-31 17:16:24,563 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:16:24,563 INFO L514 BasicCegarLoop]: trace histogram [57, 57, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:16:24,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-01-31 17:16:24,563 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:16:24,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:16:24,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1220545699, now seen corresponding path program 57 times [2022-01-31 17:16:24,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:16:24,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1639011352] [2022-01-31 17:16:24,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:16:24,565 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:16:24,565 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:16:24,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:16:24,572 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:16:24,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:25,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:16:25,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:25,429 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 17:16:25,429 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:16:25,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1639011352] [2022-01-31 17:16:25,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1639011352] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:16:25,429 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:16:25,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-01-31 17:16:25,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138369117] [2022-01-31 17:16:25,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:16:25,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-01-31 17:16:25,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:16:25,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-01-31 17:16:25,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 17:16:25,431 INFO L87 Difference]: Start difference. First operand 162 states and 168 transitions. Second operand has 61 states, 61 states have (on average 2.3442622950819674) internal successors, (143), 60 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 17:16:26,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:16:26,578 INFO L93 Difference]: Finished difference Result 206 states and 218 transitions. [2022-01-31 17:16:26,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-31 17:16:26,579 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.3442622950819674) internal successors, (143), 60 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 157 [2022-01-31 17:16:26,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:16:26,579 INFO L225 Difference]: With dead ends: 206 [2022-01-31 17:16:26,579 INFO L226 Difference]: Without dead ends: 165 [2022-01-31 17:16:26,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1710 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=5310, Invalid=8732, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 17:16:26,581 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 149 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:16:26,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 54 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:16:26,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-01-31 17:16:26,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2022-01-31 17:16:26,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 158 states have (on average 1.0443037974683544) internal successors, (165), 158 states have internal predecessors, (165), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:16:26,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 170 transitions. [2022-01-31 17:16:26,603 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 170 transitions. Word has length 157 [2022-01-31 17:16:26,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:16:26,603 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 170 transitions. [2022-01-31 17:16:26,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.3442622950819674) internal successors, (143), 60 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 17:16:26,604 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 170 transitions. [2022-01-31 17:16:26,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-01-31 17:16:26,604 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:16:26,604 INFO L514 BasicCegarLoop]: trace histogram [58, 58, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:16:26,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-01-31 17:16:26,604 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:16:26,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:16:26,605 INFO L85 PathProgramCache]: Analyzing trace with hash -304434949, now seen corresponding path program 58 times [2022-01-31 17:16:26,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:16:26,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1319213094] [2022-01-31 17:16:26,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:16:26,606 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:16:26,606 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:16:26,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:16:26,612 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:16:26,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:27,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:16:27,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:27,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:16:27,683 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:16:27,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1319213094] [2022-01-31 17:16:27,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1319213094] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:16:27,683 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:16:27,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-01-31 17:16:27,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737535308] [2022-01-31 17:16:27,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:16:27,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-01-31 17:16:27,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:16:27,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-01-31 17:16:27,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 17:16:27,685 INFO L87 Difference]: Start difference. First operand 164 states and 170 transitions. Second operand has 62 states, 62 states have (on average 2.338709677419355) internal successors, (145), 61 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 17:16:28,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:16:28,861 INFO L93 Difference]: Finished difference Result 208 states and 220 transitions. [2022-01-31 17:16:28,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-31 17:16:28,861 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.338709677419355) internal successors, (145), 61 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 159 [2022-01-31 17:16:28,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:16:28,862 INFO L225 Difference]: With dead ends: 208 [2022-01-31 17:16:28,862 INFO L226 Difference]: Without dead ends: 167 [2022-01-31 17:16:28,863 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 17:16:28,863 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 151 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:16:28,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 69 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:16:28,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-01-31 17:16:28,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 166. [2022-01-31 17:16:28,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 160 states have (on average 1.04375) internal successors, (167), 160 states have internal predecessors, (167), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:16:28,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 172 transitions. [2022-01-31 17:16:28,886 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 172 transitions. Word has length 159 [2022-01-31 17:16:28,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:16:28,886 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 172 transitions. [2022-01-31 17:16:28,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.338709677419355) internal successors, (145), 61 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 17:16:28,886 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 172 transitions. [2022-01-31 17:16:28,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-01-31 17:16:28,887 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:16:28,887 INFO L514 BasicCegarLoop]: trace histogram [59, 59, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:16:28,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-01-31 17:16:28,887 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:16:28,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:16:28,887 INFO L85 PathProgramCache]: Analyzing trace with hash -390299879, now seen corresponding path program 59 times [2022-01-31 17:16:28,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:16:28,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [11382105] [2022-01-31 17:16:28,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:16:28,889 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:16:28,889 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:16:28,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:16:28,895 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:16:28,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:29,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:16:29,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:29,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:16:29,906 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:16:29,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [11382105] [2022-01-31 17:16:29,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [11382105] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:16:29,907 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:16:29,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-01-31 17:16:29,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809564836] [2022-01-31 17:16:29,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:16:29,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-01-31 17:16:29,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:16:29,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-01-31 17:16:29,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 17:16:29,908 INFO L87 Difference]: Start difference. First operand 166 states and 172 transitions. Second operand has 63 states, 63 states have (on average 2.3333333333333335) internal successors, (147), 62 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 17:16:30,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:16:30,993 INFO L93 Difference]: Finished difference Result 210 states and 222 transitions. [2022-01-31 17:16:30,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-31 17:16:30,993 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.3333333333333335) internal successors, (147), 62 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 161 [2022-01-31 17:16:30,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:16:30,993 INFO L225 Difference]: With dead ends: 210 [2022-01-31 17:16:30,993 INFO L226 Difference]: Without dead ends: 169 [2022-01-31 17:16:30,994 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 17:16:30,995 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 153 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:16:30,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 64 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:16:30,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-01-31 17:16:31,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 168. [2022-01-31 17:16:31,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 162 states have (on average 1.0432098765432098) internal successors, (169), 162 states have internal predecessors, (169), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:16:31,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 174 transitions. [2022-01-31 17:16:31,019 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 174 transitions. Word has length 161 [2022-01-31 17:16:31,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:16:31,019 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 174 transitions. [2022-01-31 17:16:31,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.3333333333333335) internal successors, (147), 62 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 17:16:31,019 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 174 transitions. [2022-01-31 17:16:31,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-01-31 17:16:31,021 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:16:31,021 INFO L514 BasicCegarLoop]: trace histogram [60, 60, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:16:31,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-01-31 17:16:31,021 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:16:31,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:16:31,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1302118985, now seen corresponding path program 60 times [2022-01-31 17:16:31,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:16:31,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1910084548] [2022-01-31 17:16:31,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:16:31,023 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:16:31,023 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:16:31,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:16:31,029 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:16:31,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:31,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:16:31,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:31,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:16:31,851 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:16:31,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1910084548] [2022-01-31 17:16:31,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1910084548] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:16:31,851 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:16:31,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-01-31 17:16:31,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528118551] [2022-01-31 17:16:31,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:16:31,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-01-31 17:16:31,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:16:31,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-01-31 17:16:31,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 17:16:31,853 INFO L87 Difference]: Start difference. First operand 168 states and 174 transitions. Second operand has 64 states, 64 states have (on average 2.328125) internal successors, (149), 63 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 17:16:33,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:16:33,071 INFO L93 Difference]: Finished difference Result 212 states and 224 transitions. [2022-01-31 17:16:33,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-31 17:16:33,071 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.328125) internal successors, (149), 63 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 163 [2022-01-31 17:16:33,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:16:33,072 INFO L225 Difference]: With dead ends: 212 [2022-01-31 17:16:33,072 INFO L226 Difference]: Without dead ends: 171 [2022-01-31 17:16:33,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1890 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=5859, Invalid=9641, Unknown=0, NotChecked=0, Total=15500 [2022-01-31 17:16:33,073 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 155 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:16:33,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 64 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:16:33,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-01-31 17:16:33,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 170. [2022-01-31 17:16:33,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 164 states have (on average 1.0426829268292683) internal successors, (171), 164 states have internal predecessors, (171), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:16:33,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 176 transitions. [2022-01-31 17:16:33,110 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 176 transitions. Word has length 163 [2022-01-31 17:16:33,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:16:33,110 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 176 transitions. [2022-01-31 17:16:33,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.328125) internal successors, (149), 63 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 17:16:33,110 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 176 transitions. [2022-01-31 17:16:33,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-01-31 17:16:33,110 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:16:33,111 INFO L514 BasicCegarLoop]: trace histogram [61, 61, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:16:33,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-01-31 17:16:33,111 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:16:33,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:16:33,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1386951467, now seen corresponding path program 61 times [2022-01-31 17:16:33,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:16:33,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [897208625] [2022-01-31 17:16:33,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:16:33,113 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:16:33,113 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:16:33,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:16:33,120 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:16:33,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:34,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:16:34,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:34,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:16:34,069 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:16:34,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [897208625] [2022-01-31 17:16:34,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [897208625] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:16:34,069 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:16:34,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-01-31 17:16:34,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546920729] [2022-01-31 17:16:34,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:16:34,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-01-31 17:16:34,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:16:34,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-01-31 17:16:34,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 17:16:34,071 INFO L87 Difference]: Start difference. First operand 170 states and 176 transitions. Second operand has 65 states, 65 states have (on average 2.3230769230769233) internal successors, (151), 64 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 17:16:35,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:16:35,468 INFO L93 Difference]: Finished difference Result 214 states and 226 transitions. [2022-01-31 17:16:35,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-31 17:16:35,468 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.3230769230769233) internal successors, (151), 64 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 165 [2022-01-31 17:16:35,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:16:35,469 INFO L225 Difference]: With dead ends: 214 [2022-01-31 17:16:35,469 INFO L226 Difference]: Without dead ends: 173 [2022-01-31 17:16:35,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1952 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=6048, Invalid=9954, Unknown=0, NotChecked=0, Total=16002 [2022-01-31 17:16:35,470 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 157 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:16:35,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 74 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:16:35,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-01-31 17:16:35,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 172. [2022-01-31 17:16:35,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 166 states have (on average 1.0421686746987953) internal successors, (173), 166 states have internal predecessors, (173), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:16:35,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 178 transitions. [2022-01-31 17:16:35,496 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 178 transitions. Word has length 165 [2022-01-31 17:16:35,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:16:35,496 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 178 transitions. [2022-01-31 17:16:35,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.3230769230769233) internal successors, (151), 64 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 17:16:35,497 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 178 transitions. [2022-01-31 17:16:35,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-01-31 17:16:35,497 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:16:35,497 INFO L514 BasicCegarLoop]: trace histogram [62, 62, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:16:35,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-01-31 17:16:35,497 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:16:35,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:16:35,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1306588045, now seen corresponding path program 62 times [2022-01-31 17:16:35,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:16:35,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1311367895] [2022-01-31 17:16:35,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:16:35,499 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:16:35,499 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:16:35,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:16:35,506 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:16:35,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:36,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:16:36,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:36,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:16:36,488 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:16:36,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1311367895] [2022-01-31 17:16:36,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1311367895] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:16:36,488 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:16:36,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-01-31 17:16:36,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128871355] [2022-01-31 17:16:36,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:16:36,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-01-31 17:16:36,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:16:36,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-01-31 17:16:36,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 17:16:36,490 INFO L87 Difference]: Start difference. First operand 172 states and 178 transitions. Second operand has 66 states, 66 states have (on average 2.3181818181818183) internal successors, (153), 65 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 17:16:37,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:16:37,654 INFO L93 Difference]: Finished difference Result 216 states and 228 transitions. [2022-01-31 17:16:37,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-31 17:16:37,654 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.3181818181818183) internal successors, (153), 65 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 167 [2022-01-31 17:16:37,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:16:37,655 INFO L225 Difference]: With dead ends: 216 [2022-01-31 17:16:37,655 INFO L226 Difference]: Without dead ends: 175 [2022-01-31 17:16:37,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2015 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=6240, Invalid=10272, Unknown=0, NotChecked=0, Total=16512 [2022-01-31 17:16:37,656 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 159 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:16:37,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 79 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:16:37,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-01-31 17:16:37,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 174. [2022-01-31 17:16:37,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 168 states have (on average 1.0416666666666667) internal successors, (175), 168 states have internal predecessors, (175), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:16:37,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 180 transitions. [2022-01-31 17:16:37,685 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 180 transitions. Word has length 167 [2022-01-31 17:16:37,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:16:37,685 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 180 transitions. [2022-01-31 17:16:37,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.3181818181818183) internal successors, (153), 65 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 17:16:37,685 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 180 transitions. [2022-01-31 17:16:37,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-01-31 17:16:37,685 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:16:37,685 INFO L514 BasicCegarLoop]: trace histogram [63, 63, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:16:37,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-01-31 17:16:37,686 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:16:37,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:16:37,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1386750831, now seen corresponding path program 63 times [2022-01-31 17:16:37,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:16:37,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [531481047] [2022-01-31 17:16:37,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:16:37,699 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:16:37,699 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:16:37,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:16:37,706 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:16:37,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:39,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:16:39,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:39,098 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 17:16:39,098 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:16:39,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [531481047] [2022-01-31 17:16:39,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [531481047] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:16:39,098 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:16:39,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-01-31 17:16:39,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128084594] [2022-01-31 17:16:39,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:16:39,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-01-31 17:16:39,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:16:39,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-01-31 17:16:39,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 17:16:39,100 INFO L87 Difference]: Start difference. First operand 174 states and 180 transitions. Second operand has 67 states, 67 states have (on average 2.3134328358208953) internal successors, (155), 66 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 17:16:40,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:16:40,322 INFO L93 Difference]: Finished difference Result 218 states and 230 transitions. [2022-01-31 17:16:40,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-31 17:16:40,322 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.3134328358208953) internal successors, (155), 66 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 169 [2022-01-31 17:16:40,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:16:40,323 INFO L225 Difference]: With dead ends: 218 [2022-01-31 17:16:40,323 INFO L226 Difference]: Without dead ends: 177 [2022-01-31 17:16:40,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2079 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=6435, Invalid=10595, Unknown=0, NotChecked=0, Total=17030 [2022-01-31 17:16:40,326 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 161 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:16:40,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 64 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:16:40,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-01-31 17:16:40,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 176. [2022-01-31 17:16:40,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 170 states have (on average 1.0411764705882354) internal successors, (177), 170 states have internal predecessors, (177), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:16:40,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 182 transitions. [2022-01-31 17:16:40,354 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 182 transitions. Word has length 169 [2022-01-31 17:16:40,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:16:40,354 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 182 transitions. [2022-01-31 17:16:40,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.3134328358208953) internal successors, (155), 66 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 17:16:40,355 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 182 transitions. [2022-01-31 17:16:40,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-01-31 17:16:40,355 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:16:40,355 INFO L514 BasicCegarLoop]: trace histogram [64, 64, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:16:40,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-01-31 17:16:40,355 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:16:40,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:16:40,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1113776849, now seen corresponding path program 64 times [2022-01-31 17:16:40,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:16:40,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [471709013] [2022-01-31 17:16:40,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:16:40,357 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:16:40,357 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:16:40,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:16:40,364 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:16:40,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:41,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:16:41,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:41,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:16:41,392 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:16:41,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [471709013] [2022-01-31 17:16:41,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [471709013] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:16:41,392 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:16:41,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-01-31 17:16:41,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124864691] [2022-01-31 17:16:41,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:16:41,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-01-31 17:16:41,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:16:41,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-01-31 17:16:41,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 17:16:41,394 INFO L87 Difference]: Start difference. First operand 176 states and 182 transitions. Second operand has 68 states, 68 states have (on average 2.3088235294117645) internal successors, (157), 67 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 17:16:42,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:16:42,570 INFO L93 Difference]: Finished difference Result 220 states and 232 transitions. [2022-01-31 17:16:42,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-31 17:16:42,571 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.3088235294117645) internal successors, (157), 67 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 171 [2022-01-31 17:16:42,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:16:42,571 INFO L225 Difference]: With dead ends: 220 [2022-01-31 17:16:42,572 INFO L226 Difference]: Without dead ends: 179 [2022-01-31 17:16:42,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2144 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=6633, Invalid=10923, Unknown=0, NotChecked=0, Total=17556 [2022-01-31 17:16:42,574 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 163 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:16:42,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 64 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:16:42,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-01-31 17:16:42,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 178. [2022-01-31 17:16:42,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 172 states have (on average 1.0406976744186047) internal successors, (179), 172 states have internal predecessors, (179), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:16:42,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 184 transitions. [2022-01-31 17:16:42,603 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 184 transitions. Word has length 171 [2022-01-31 17:16:42,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:16:42,603 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 184 transitions. [2022-01-31 17:16:42,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.3088235294117645) internal successors, (157), 67 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 17:16:42,604 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 184 transitions. [2022-01-31 17:16:42,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-01-31 17:16:42,604 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:16:42,604 INFO L514 BasicCegarLoop]: trace histogram [65, 65, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:16:42,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-01-31 17:16:42,604 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:16:42,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:16:42,605 INFO L85 PathProgramCache]: Analyzing trace with hash -778785203, now seen corresponding path program 65 times [2022-01-31 17:16:42,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:16:42,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [198014512] [2022-01-31 17:16:42,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:16:42,606 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:16:42,606 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:16:42,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:16:42,616 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:16:42,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:43,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:16:43,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:43,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:16:43,785 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:16:43,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [198014512] [2022-01-31 17:16:43,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [198014512] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:16:43,786 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:16:43,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-01-31 17:16:43,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424091670] [2022-01-31 17:16:43,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:16:43,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-01-31 17:16:43,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:16:43,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-01-31 17:16:43,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 17:16:43,787 INFO L87 Difference]: Start difference. First operand 178 states and 184 transitions. Second operand has 69 states, 69 states have (on average 2.3043478260869565) internal successors, (159), 68 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 17:16:45,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:16:45,171 INFO L93 Difference]: Finished difference Result 222 states and 234 transitions. [2022-01-31 17:16:45,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-31 17:16:45,172 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.3043478260869565) internal successors, (159), 68 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 173 [2022-01-31 17:16:45,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:16:45,172 INFO L225 Difference]: With dead ends: 222 [2022-01-31 17:16:45,172 INFO L226 Difference]: Without dead ends: 181 [2022-01-31 17:16:45,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2210 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=6834, Invalid=11256, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 17:16:45,175 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 165 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:16:45,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 79 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:16:45,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-01-31 17:16:45,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 180. [2022-01-31 17:16:45,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 174 states have (on average 1.0402298850574712) internal successors, (181), 174 states have internal predecessors, (181), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:16:45,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 186 transitions. [2022-01-31 17:16:45,204 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 186 transitions. Word has length 173 [2022-01-31 17:16:45,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:16:45,205 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 186 transitions. [2022-01-31 17:16:45,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.3043478260869565) internal successors, (159), 68 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 17:16:45,205 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 186 transitions. [2022-01-31 17:16:45,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-01-31 17:16:45,205 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:16:45,205 INFO L514 BasicCegarLoop]: trace histogram [66, 66, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:16:45,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-01-31 17:16:45,205 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:16:45,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:16:45,206 INFO L85 PathProgramCache]: Analyzing trace with hash -974360597, now seen corresponding path program 66 times [2022-01-31 17:16:45,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:16:45,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1091217573] [2022-01-31 17:16:45,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:16:45,207 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:16:45,207 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:16:45,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:16:45,215 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:16:45,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:46,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:16:46,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:46,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:16:46,217 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:16:46,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1091217573] [2022-01-31 17:16:46,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1091217573] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:16:46,217 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:16:46,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-01-31 17:16:46,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182035001] [2022-01-31 17:16:46,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:16:46,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-01-31 17:16:46,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:16:46,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-01-31 17:16:46,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2022-01-31 17:16:46,219 INFO L87 Difference]: Start difference. First operand 180 states and 186 transitions. Second operand has 70 states, 70 states have (on average 2.3) internal successors, (161), 69 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 17:16:47,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:16:47,479 INFO L93 Difference]: Finished difference Result 224 states and 236 transitions. [2022-01-31 17:16:47,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-31 17:16:47,479 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.3) internal successors, (161), 69 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 175 [2022-01-31 17:16:47,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:16:47,480 INFO L225 Difference]: With dead ends: 224 [2022-01-31 17:16:47,480 INFO L226 Difference]: Without dead ends: 183 [2022-01-31 17:16:47,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2277 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=7038, Invalid=11594, Unknown=0, NotChecked=0, Total=18632 [2022-01-31 17:16:47,482 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 167 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:16:47,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 59 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:16:47,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-01-31 17:16:47,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 182. [2022-01-31 17:16:47,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 176 states have (on average 1.0397727272727273) internal successors, (183), 176 states have internal predecessors, (183), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:16:47,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 188 transitions. [2022-01-31 17:16:47,513 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 188 transitions. Word has length 175 [2022-01-31 17:16:47,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:16:47,514 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 188 transitions. [2022-01-31 17:16:47,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.3) internal successors, (161), 69 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 17:16:47,514 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 188 transitions. [2022-01-31 17:16:47,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-01-31 17:16:47,514 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:16:47,514 INFO L514 BasicCegarLoop]: trace histogram [67, 67, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:16:47,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-01-31 17:16:47,515 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:16:47,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:16:47,515 INFO L85 PathProgramCache]: Analyzing trace with hash 56246793, now seen corresponding path program 67 times [2022-01-31 17:16:47,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:16:47,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1074150979] [2022-01-31 17:16:47,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:16:47,516 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:16:47,516 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:16:47,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:16:47,525 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:16:47,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:48,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:16:48,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:48,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:16:48,643 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:16:48,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1074150979] [2022-01-31 17:16:48,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1074150979] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:16:48,643 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:16:48,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-01-31 17:16:48,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167805244] [2022-01-31 17:16:48,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:16:48,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-01-31 17:16:48,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:16:48,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-01-31 17:16:48,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 17:16:48,645 INFO L87 Difference]: Start difference. First operand 182 states and 188 transitions. Second operand has 71 states, 71 states have (on average 2.295774647887324) internal successors, (163), 70 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 17:16:49,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:16:49,946 INFO L93 Difference]: Finished difference Result 226 states and 238 transitions. [2022-01-31 17:16:49,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-31 17:16:49,947 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.295774647887324) internal successors, (163), 70 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 177 [2022-01-31 17:16:49,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:16:49,949 INFO L225 Difference]: With dead ends: 226 [2022-01-31 17:16:49,949 INFO L226 Difference]: Without dead ends: 185 [2022-01-31 17:16:49,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2345 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=7245, Invalid=11937, Unknown=0, NotChecked=0, Total=19182 [2022-01-31 17:16:49,952 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 169 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:16:49,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 69 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:16:49,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-01-31 17:16:49,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 184. [2022-01-31 17:16:49,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 178 states have (on average 1.0393258426966292) internal successors, (185), 178 states have internal predecessors, (185), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:16:49,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 190 transitions. [2022-01-31 17:16:49,984 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 190 transitions. Word has length 177 [2022-01-31 17:16:49,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:16:49,985 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 190 transitions. [2022-01-31 17:16:49,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.295774647887324) internal successors, (163), 70 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 17:16:49,985 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 190 transitions. [2022-01-31 17:16:49,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-01-31 17:16:49,985 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:16:49,985 INFO L514 BasicCegarLoop]: trace histogram [68, 68, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:16:49,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-01-31 17:16:49,986 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:16:49,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:16:49,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1667496793, now seen corresponding path program 68 times [2022-01-31 17:16:49,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:16:49,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1242381476] [2022-01-31 17:16:49,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:16:49,988 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:16:49,988 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:16:49,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:16:49,997 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:16:50,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:51,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:16:51,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:51,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:16:51,718 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:16:51,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1242381476] [2022-01-31 17:16:51,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1242381476] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:16:51,718 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:16:51,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-01-31 17:16:51,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510222247] [2022-01-31 17:16:51,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:16:51,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-01-31 17:16:51,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:16:51,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-01-31 17:16:51,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 17:16:51,720 INFO L87 Difference]: Start difference. First operand 184 states and 190 transitions. Second operand has 72 states, 72 states have (on average 2.2916666666666665) internal successors, (165), 71 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 17:16:53,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:16:53,469 INFO L93 Difference]: Finished difference Result 228 states and 240 transitions. [2022-01-31 17:16:53,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-31 17:16:53,470 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.2916666666666665) internal successors, (165), 71 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 179 [2022-01-31 17:16:53,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:16:53,470 INFO L225 Difference]: With dead ends: 228 [2022-01-31 17:16:53,470 INFO L226 Difference]: Without dead ends: 187 [2022-01-31 17:16:53,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2414 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=7455, Invalid=12285, Unknown=0, NotChecked=0, Total=19740 [2022-01-31 17:16:53,487 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 171 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:16:53,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 84 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:16:53,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-01-31 17:16:53,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 186. [2022-01-31 17:16:53,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 180 states have (on average 1.038888888888889) internal successors, (187), 180 states have internal predecessors, (187), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:16:53,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 192 transitions. [2022-01-31 17:16:53,534 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 192 transitions. Word has length 179 [2022-01-31 17:16:53,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:16:53,534 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 192 transitions. [2022-01-31 17:16:53,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.2916666666666665) internal successors, (165), 71 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 17:16:53,534 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 192 transitions. [2022-01-31 17:16:53,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-01-31 17:16:53,535 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:16:53,535 INFO L514 BasicCegarLoop]: trace histogram [69, 69, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:16:53,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-01-31 17:16:53,535 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:16:53,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:16:53,535 INFO L85 PathProgramCache]: Analyzing trace with hash -327706683, now seen corresponding path program 69 times [2022-01-31 17:16:53,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:16:53,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1395227171] [2022-01-31 17:16:53,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:16:53,537 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:16:53,537 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:16:53,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:16:53,546 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:16:53,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:54,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:16:54,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:54,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:16:54,596 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:16:54,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1395227171] [2022-01-31 17:16:54,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1395227171] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:16:54,596 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:16:54,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-01-31 17:16:54,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100740309] [2022-01-31 17:16:54,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:16:54,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-01-31 17:16:54,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:16:54,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-01-31 17:16:54,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 17:16:54,598 INFO L87 Difference]: Start difference. First operand 186 states and 192 transitions. Second operand has 73 states, 73 states have (on average 2.287671232876712) internal successors, (167), 72 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 17:16:55,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:16:55,979 INFO L93 Difference]: Finished difference Result 230 states and 242 transitions. [2022-01-31 17:16:55,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-31 17:16:55,980 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.287671232876712) internal successors, (167), 72 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 181 [2022-01-31 17:16:55,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:16:55,980 INFO L225 Difference]: With dead ends: 230 [2022-01-31 17:16:55,980 INFO L226 Difference]: Without dead ends: 189 [2022-01-31 17:16:56,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2484 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=7668, Invalid=12638, Unknown=0, NotChecked=0, Total=20306 [2022-01-31 17:16:56,007 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 173 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:16:56,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 74 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:16:56,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-01-31 17:16:56,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 188. [2022-01-31 17:16:56,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 182 states have (on average 1.0384615384615385) internal successors, (189), 182 states have internal predecessors, (189), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:16:56,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 194 transitions. [2022-01-31 17:16:56,059 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 194 transitions. Word has length 181 [2022-01-31 17:16:56,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:16:56,059 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 194 transitions. [2022-01-31 17:16:56,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.287671232876712) internal successors, (167), 72 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 17:16:56,059 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 194 transitions. [2022-01-31 17:16:56,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-01-31 17:16:56,059 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:16:56,060 INFO L514 BasicCegarLoop]: trace histogram [70, 70, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:16:56,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-01-31 17:16:56,060 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:16:56,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:16:56,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1279599773, now seen corresponding path program 70 times [2022-01-31 17:16:56,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:16:56,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [316777760] [2022-01-31 17:16:56,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:16:56,061 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:16:56,061 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:16:56,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:16:56,070 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:16:56,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:57,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:16:57,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:57,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:16:57,238 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:16:57,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [316777760] [2022-01-31 17:16:57,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [316777760] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:16:57,238 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:16:57,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-01-31 17:16:57,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052345523] [2022-01-31 17:16:57,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:16:57,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-01-31 17:16:57,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:16:57,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-01-31 17:16:57,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 17:16:57,241 INFO L87 Difference]: Start difference. First operand 188 states and 194 transitions. Second operand has 74 states, 74 states have (on average 2.2837837837837838) internal successors, (169), 73 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 17:16:58,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:16:58,662 INFO L93 Difference]: Finished difference Result 232 states and 244 transitions. [2022-01-31 17:16:58,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-31 17:16:58,662 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.2837837837837838) internal successors, (169), 73 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 183 [2022-01-31 17:16:58,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:16:58,663 INFO L225 Difference]: With dead ends: 232 [2022-01-31 17:16:58,663 INFO L226 Difference]: Without dead ends: 191 [2022-01-31 17:16:58,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2555 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=7884, Invalid=12996, Unknown=0, NotChecked=0, Total=20880 [2022-01-31 17:16:58,665 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 175 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:16:58,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 54 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:16:58,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-01-31 17:16:58,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 190. [2022-01-31 17:16:58,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 184 states have (on average 1.0380434782608696) internal successors, (191), 184 states have internal predecessors, (191), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:16:58,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 196 transitions. [2022-01-31 17:16:58,698 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 196 transitions. Word has length 183 [2022-01-31 17:16:58,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:16:58,698 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 196 transitions. [2022-01-31 17:16:58,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.2837837837837838) internal successors, (169), 73 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 17:16:58,699 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 196 transitions. [2022-01-31 17:16:58,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-01-31 17:16:58,699 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:16:58,699 INFO L514 BasicCegarLoop]: trace histogram [71, 71, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:16:58,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-01-31 17:16:58,699 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:16:58,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:16:58,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1220825215, now seen corresponding path program 71 times [2022-01-31 17:16:58,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:16:58,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1065704357] [2022-01-31 17:16:58,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:16:58,701 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:16:58,701 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:16:58,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:16:58,711 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:16:58,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:59,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:16:59,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:59,937 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 17:16:59,937 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:16:59,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1065704357] [2022-01-31 17:16:59,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1065704357] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:16:59,937 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:16:59,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-01-31 17:16:59,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532930544] [2022-01-31 17:16:59,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:16:59,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-01-31 17:16:59,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:16:59,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-01-31 17:16:59,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 17:16:59,939 INFO L87 Difference]: Start difference. First operand 190 states and 196 transitions. Second operand has 75 states, 75 states have (on average 2.28) internal successors, (171), 74 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 17:17:01,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:17:01,385 INFO L93 Difference]: Finished difference Result 234 states and 246 transitions. [2022-01-31 17:17:01,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-31 17:17:01,385 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.28) internal successors, (171), 74 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 185 [2022-01-31 17:17:01,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:17:01,386 INFO L225 Difference]: With dead ends: 234 [2022-01-31 17:17:01,386 INFO L226 Difference]: Without dead ends: 193 [2022-01-31 17:17:01,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2627 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=8103, Invalid=13359, Unknown=0, NotChecked=0, Total=21462 [2022-01-31 17:17:01,388 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 177 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:17:01,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 69 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:17:01,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-01-31 17:17:01,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 192. [2022-01-31 17:17:01,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 186 states have (on average 1.0376344086021505) internal successors, (193), 186 states have internal predecessors, (193), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:17:01,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 198 transitions. [2022-01-31 17:17:01,429 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 198 transitions. Word has length 185 [2022-01-31 17:17:01,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:17:01,429 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 198 transitions. [2022-01-31 17:17:01,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.28) internal successors, (171), 74 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 17:17:01,429 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 198 transitions. [2022-01-31 17:17:01,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-01-31 17:17:01,430 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:17:01,430 INFO L514 BasicCegarLoop]: trace histogram [72, 72, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:17:01,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-01-31 17:17:01,430 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:17:01,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:17:01,430 INFO L85 PathProgramCache]: Analyzing trace with hash -573049825, now seen corresponding path program 72 times [2022-01-31 17:17:01,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:17:01,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [97581903] [2022-01-31 17:17:01,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:17:01,431 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:17:01,432 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:17:01,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:17:01,441 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:17:01,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:17:02,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:17:02,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:17:02,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:17:02,544 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:17:02,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [97581903] [2022-01-31 17:17:02,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [97581903] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:17:02,544 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:17:02,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-01-31 17:17:02,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484166092] [2022-01-31 17:17:02,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:17:02,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-01-31 17:17:02,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:17:02,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-01-31 17:17:02,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 17:17:02,546 INFO L87 Difference]: Start difference. First operand 192 states and 198 transitions. Second operand has 76 states, 76 states have (on average 2.276315789473684) internal successors, (173), 75 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 17:17:04,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:17:04,066 INFO L93 Difference]: Finished difference Result 236 states and 248 transitions. [2022-01-31 17:17:04,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-31 17:17:04,066 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.276315789473684) internal successors, (173), 75 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 187 [2022-01-31 17:17:04,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:17:04,067 INFO L225 Difference]: With dead ends: 236 [2022-01-31 17:17:04,067 INFO L226 Difference]: Without dead ends: 195 [2022-01-31 17:17:04,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2700 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=8325, Invalid=13727, Unknown=0, NotChecked=0, Total=22052 [2022-01-31 17:17:04,069 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 179 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:17:04,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 64 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:17:04,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-01-31 17:17:04,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 194. [2022-01-31 17:17:04,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 188 states have (on average 1.0372340425531914) internal successors, (195), 188 states have internal predecessors, (195), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:17:04,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 200 transitions. [2022-01-31 17:17:04,106 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 200 transitions. Word has length 187 [2022-01-31 17:17:04,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:17:04,106 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 200 transitions. [2022-01-31 17:17:04,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.276315789473684) internal successors, (173), 75 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 17:17:04,106 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 200 transitions. [2022-01-31 17:17:04,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-01-31 17:17:04,107 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:17:04,107 INFO L514 BasicCegarLoop]: trace histogram [73, 73, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:17:04,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-01-31 17:17:04,107 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:17:04,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:17:04,107 INFO L85 PathProgramCache]: Analyzing trace with hash -831157955, now seen corresponding path program 73 times [2022-01-31 17:17:04,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:17:04,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1496348462] [2022-01-31 17:17:04,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:17:04,109 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:17:04,109 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:17:04,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:17:04,120 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:17:04,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:17:05,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:17:05,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:17:05,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:17:05,264 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:17:05,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1496348462] [2022-01-31 17:17:05,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1496348462] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:17:05,264 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:17:05,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-01-31 17:17:05,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170710958] [2022-01-31 17:17:05,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:17:05,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-01-31 17:17:05,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:17:05,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-01-31 17:17:05,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 17:17:05,266 INFO L87 Difference]: Start difference. First operand 194 states and 200 transitions. Second operand has 77 states, 77 states have (on average 2.272727272727273) internal successors, (175), 76 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 17:17:06,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:17:06,766 INFO L93 Difference]: Finished difference Result 238 states and 250 transitions. [2022-01-31 17:17:06,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-31 17:17:06,766 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.272727272727273) internal successors, (175), 76 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 189 [2022-01-31 17:17:06,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:17:06,766 INFO L225 Difference]: With dead ends: 238 [2022-01-31 17:17:06,766 INFO L226 Difference]: Without dead ends: 197 [2022-01-31 17:17:06,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2774 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=8550, Invalid=14100, Unknown=0, NotChecked=0, Total=22650 [2022-01-31 17:17:06,768 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 181 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:17:06,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 54 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:17:06,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-01-31 17:17:06,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 196. [2022-01-31 17:17:06,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 190 states have (on average 1.0368421052631578) internal successors, (197), 190 states have internal predecessors, (197), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:17:06,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 202 transitions. [2022-01-31 17:17:06,805 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 202 transitions. Word has length 189 [2022-01-31 17:17:06,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:17:06,805 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 202 transitions. [2022-01-31 17:17:06,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.272727272727273) internal successors, (175), 76 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 17:17:06,805 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 202 transitions. [2022-01-31 17:17:06,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-01-31 17:17:06,806 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:17:06,806 INFO L514 BasicCegarLoop]: trace histogram [74, 74, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:17:06,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-01-31 17:17:06,806 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:17:06,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:17:06,806 INFO L85 PathProgramCache]: Analyzing trace with hash 235032283, now seen corresponding path program 74 times [2022-01-31 17:17:06,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:17:06,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1763260209] [2022-01-31 17:17:06,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:17:06,808 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:17:06,808 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:17:06,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:17:06,818 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:17:06,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:17:07,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:17:07,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:17:07,981 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 17:17:07,981 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:17:07,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1763260209] [2022-01-31 17:17:07,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1763260209] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:17:07,981 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:17:07,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-01-31 17:17:07,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235571974] [2022-01-31 17:17:07,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:17:07,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-01-31 17:17:07,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:17:07,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-01-31 17:17:07,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 17:17:07,984 INFO L87 Difference]: Start difference. First operand 196 states and 202 transitions. Second operand has 78 states, 78 states have (on average 2.269230769230769) internal successors, (177), 77 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 17:17:09,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:17:09,500 INFO L93 Difference]: Finished difference Result 240 states and 252 transitions. [2022-01-31 17:17:09,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-31 17:17:09,500 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.269230769230769) internal successors, (177), 77 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 191 [2022-01-31 17:17:09,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:17:09,501 INFO L225 Difference]: With dead ends: 240 [2022-01-31 17:17:09,501 INFO L226 Difference]: Without dead ends: 199 [2022-01-31 17:17:09,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2849 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=8778, Invalid=14478, Unknown=0, NotChecked=0, Total=23256 [2022-01-31 17:17:09,503 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 183 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:17:09,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 74 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:17:09,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-01-31 17:17:09,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 198. [2022-01-31 17:17:09,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 192 states have (on average 1.0364583333333333) internal successors, (199), 192 states have internal predecessors, (199), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:17:09,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 204 transitions. [2022-01-31 17:17:09,540 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 204 transitions. Word has length 191 [2022-01-31 17:17:09,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:17:09,540 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 204 transitions. [2022-01-31 17:17:09,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.269230769230769) internal successors, (177), 77 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 17:17:09,540 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 204 transitions. [2022-01-31 17:17:09,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-01-31 17:17:09,540 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:17:09,541 INFO L514 BasicCegarLoop]: trace histogram [75, 75, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:17:09,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-01-31 17:17:09,541 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:17:09,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:17:09,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1653332743, now seen corresponding path program 75 times [2022-01-31 17:17:09,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:17:09,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [411747027] [2022-01-31 17:17:09,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:17:09,542 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:17:09,542 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:17:09,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:17:09,553 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:17:09,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:17:10,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:17:10,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:17:10,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:17:10,881 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:17:10,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [411747027] [2022-01-31 17:17:10,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [411747027] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:17:10,881 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:17:10,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-01-31 17:17:10,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180136011] [2022-01-31 17:17:10,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:17:10,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-01-31 17:17:10,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:17:10,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-01-31 17:17:10,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3005, Invalid=3157, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 17:17:10,884 INFO L87 Difference]: Start difference. First operand 198 states and 204 transitions. Second operand has 79 states, 79 states have (on average 2.2658227848101267) internal successors, (179), 78 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 17:17:12,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:17:12,448 INFO L93 Difference]: Finished difference Result 242 states and 254 transitions. [2022-01-31 17:17:12,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-31 17:17:12,448 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.2658227848101267) internal successors, (179), 78 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 193 [2022-01-31 17:17:12,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:17:12,449 INFO L225 Difference]: With dead ends: 242 [2022-01-31 17:17:12,449 INFO L226 Difference]: Without dead ends: 201 [2022-01-31 17:17:12,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2925 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=9009, Invalid=14861, Unknown=0, NotChecked=0, Total=23870 [2022-01-31 17:17:12,450 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 185 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:17:12,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 64 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:17:12,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-01-31 17:17:12,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 200. [2022-01-31 17:17:12,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 194 states have (on average 1.0360824742268042) internal successors, (201), 194 states have internal predecessors, (201), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:17:12,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 206 transitions. [2022-01-31 17:17:12,489 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 206 transitions. Word has length 193 [2022-01-31 17:17:12,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:17:12,489 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 206 transitions. [2022-01-31 17:17:12,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.2658227848101267) internal successors, (179), 78 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 17:17:12,489 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 206 transitions. [2022-01-31 17:17:12,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-01-31 17:17:12,490 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:17:12,490 INFO L514 BasicCegarLoop]: trace histogram [76, 76, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:17:12,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-01-31 17:17:12,490 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:17:12,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:17:12,490 INFO L85 PathProgramCache]: Analyzing trace with hash 399043479, now seen corresponding path program 76 times [2022-01-31 17:17:12,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:17:12,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [815117964] [2022-01-31 17:17:12,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:17:12,491 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:17:12,492 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:17:12,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:17:12,503 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:17:12,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:17:13,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:17:13,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:17:13,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:17:13,742 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:17:13,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [815117964] [2022-01-31 17:17:13,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [815117964] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:17:13,742 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:17:13,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-01-31 17:17:13,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969830039] [2022-01-31 17:17:13,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:17:13,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-01-31 17:17:13,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:17:13,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-01-31 17:17:13,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 17:17:13,744 INFO L87 Difference]: Start difference. First operand 200 states and 206 transitions. Second operand has 80 states, 80 states have (on average 2.2625) internal successors, (181), 79 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 17:17:15,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:17:15,315 INFO L93 Difference]: Finished difference Result 244 states and 256 transitions. [2022-01-31 17:17:15,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-01-31 17:17:15,315 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.2625) internal successors, (181), 79 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 195 [2022-01-31 17:17:15,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:17:15,316 INFO L225 Difference]: With dead ends: 244 [2022-01-31 17:17:15,316 INFO L226 Difference]: Without dead ends: 203 [2022-01-31 17:17:15,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3002 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=9243, Invalid=15249, Unknown=0, NotChecked=0, Total=24492 [2022-01-31 17:17:15,318 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 187 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:17:15,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 59 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:17:15,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-01-31 17:17:15,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 202. [2022-01-31 17:17:15,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 196 states have (on average 1.0357142857142858) internal successors, (203), 196 states have internal predecessors, (203), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:17:15,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 208 transitions. [2022-01-31 17:17:15,358 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 208 transitions. Word has length 195 [2022-01-31 17:17:15,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:17:15,358 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 208 transitions. [2022-01-31 17:17:15,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.2625) internal successors, (181), 79 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 17:17:15,358 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 208 transitions. [2022-01-31 17:17:15,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-01-31 17:17:15,359 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:17:15,359 INFO L514 BasicCegarLoop]: trace histogram [77, 77, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:17:15,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-01-31 17:17:15,359 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:17:15,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:17:15,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1342603957, now seen corresponding path program 77 times [2022-01-31 17:17:15,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:17:15,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1734365078] [2022-01-31 17:17:15,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:17:15,361 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:17:15,361 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:17:15,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:17:15,372 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:17:15,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:17:16,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:17:16,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:17:16,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:17:16,977 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:17:16,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1734365078] [2022-01-31 17:17:16,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1734365078] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:17:16,977 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:17:16,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-01-31 17:17:16,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828351485] [2022-01-31 17:17:16,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:17:16,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-01-31 17:17:16,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:17:16,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-01-31 17:17:16,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3162, Invalid=3318, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 17:17:16,979 INFO L87 Difference]: Start difference. First operand 202 states and 208 transitions. Second operand has 81 states, 81 states have (on average 2.259259259259259) internal successors, (183), 80 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 17:17:19,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:17:19,094 INFO L93 Difference]: Finished difference Result 246 states and 258 transitions. [2022-01-31 17:17:19,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-01-31 17:17:19,094 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.259259259259259) internal successors, (183), 80 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 197 [2022-01-31 17:17:19,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:17:19,095 INFO L225 Difference]: With dead ends: 246 [2022-01-31 17:17:19,095 INFO L226 Difference]: Without dead ends: 205 [2022-01-31 17:17:19,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3080 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=9480, Invalid=15642, Unknown=0, NotChecked=0, Total=25122 [2022-01-31 17:17:19,097 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 189 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:17:19,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 59 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:17:19,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-01-31 17:17:19,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 204. [2022-01-31 17:17:19,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 198 states have (on average 1.0353535353535352) internal successors, (205), 198 states have internal predecessors, (205), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:17:19,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 210 transitions. [2022-01-31 17:17:19,137 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 210 transitions. Word has length 197 [2022-01-31 17:17:19,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:17:19,137 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 210 transitions. [2022-01-31 17:17:19,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.259259259259259) internal successors, (183), 80 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 17:17:19,137 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 210 transitions. [2022-01-31 17:17:19,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-01-31 17:17:19,138 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:17:19,138 INFO L514 BasicCegarLoop]: trace histogram [78, 78, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:17:19,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-01-31 17:17:19,138 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:17:19,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:17:19,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1866123859, now seen corresponding path program 78 times [2022-01-31 17:17:19,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:17:19,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [646541915] [2022-01-31 17:17:19,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:17:19,140 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:17:19,140 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:17:19,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:17:19,151 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:17:19,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:17:20,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:17:20,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:17:20,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:17:20,548 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:17:20,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [646541915] [2022-01-31 17:17:20,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [646541915] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:17:20,548 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:17:20,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-01-31 17:17:20,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466206923] [2022-01-31 17:17:20,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:17:20,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-01-31 17:17:20,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:17:20,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-01-31 17:17:20,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2022-01-31 17:17:20,549 INFO L87 Difference]: Start difference. First operand 204 states and 210 transitions. Second operand has 82 states, 82 states have (on average 2.2560975609756095) internal successors, (185), 81 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 17:17:22,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:17:22,298 INFO L93 Difference]: Finished difference Result 248 states and 260 transitions. [2022-01-31 17:17:22,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-31 17:17:22,298 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.2560975609756095) internal successors, (185), 81 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 199 [2022-01-31 17:17:22,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:17:22,299 INFO L225 Difference]: With dead ends: 248 [2022-01-31 17:17:22,299 INFO L226 Difference]: Without dead ends: 207 [2022-01-31 17:17:22,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3159 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=9720, Invalid=16040, Unknown=0, NotChecked=0, Total=25760 [2022-01-31 17:17:22,302 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 191 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:17:22,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 59 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:17:22,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-01-31 17:17:22,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 206. [2022-01-31 17:17:22,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 200 states have (on average 1.035) internal successors, (207), 200 states have internal predecessors, (207), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:17:22,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 212 transitions. [2022-01-31 17:17:22,345 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 212 transitions. Word has length 199 [2022-01-31 17:17:22,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:17:22,345 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 212 transitions. [2022-01-31 17:17:22,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.2560975609756095) internal successors, (185), 81 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 17:17:22,345 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 212 transitions. [2022-01-31 17:17:22,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-01-31 17:17:22,346 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:17:22,346 INFO L514 BasicCegarLoop]: trace histogram [79, 79, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:17:22,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-01-31 17:17:22,346 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:17:22,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:17:22,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1837391247, now seen corresponding path program 79 times [2022-01-31 17:17:22,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:17:22,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1757020816] [2022-01-31 17:17:22,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:17:22,348 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:17:22,348 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:17:22,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:17:22,360 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:17:22,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:17:23,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:17:23,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:17:23,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:17:23,698 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:17:23,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1757020816] [2022-01-31 17:17:23,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1757020816] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:17:23,698 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:17:23,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-01-31 17:17:23,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51315279] [2022-01-31 17:17:23,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:17:23,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-01-31 17:17:23,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:17:23,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-01-31 17:17:23,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3323, Invalid=3483, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 17:17:23,700 INFO L87 Difference]: Start difference. First operand 206 states and 212 transitions. Second operand has 83 states, 83 states have (on average 2.253012048192771) internal successors, (187), 82 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 17:17:25,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:17:25,420 INFO L93 Difference]: Finished difference Result 250 states and 262 transitions. [2022-01-31 17:17:25,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-01-31 17:17:25,421 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.253012048192771) internal successors, (187), 82 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 201 [2022-01-31 17:17:25,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:17:25,421 INFO L225 Difference]: With dead ends: 250 [2022-01-31 17:17:25,421 INFO L226 Difference]: Without dead ends: 209 [2022-01-31 17:17:25,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3239 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=9963, Invalid=16443, Unknown=0, NotChecked=0, Total=26406 [2022-01-31 17:17:25,425 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 193 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:17:25,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 54 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:17:25,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-01-31 17:17:25,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 208. [2022-01-31 17:17:25,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 202 states have (on average 1.0346534653465347) internal successors, (209), 202 states have internal predecessors, (209), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:17:25,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 214 transitions. [2022-01-31 17:17:25,467 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 214 transitions. Word has length 201 [2022-01-31 17:17:25,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:17:25,467 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 214 transitions. [2022-01-31 17:17:25,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.253012048192771) internal successors, (187), 82 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 17:17:25,468 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 214 transitions. [2022-01-31 17:17:25,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-01-31 17:17:25,468 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:17:25,468 INFO L514 BasicCegarLoop]: trace histogram [80, 80, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:17:25,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-01-31 17:17:25,468 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:17:25,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:17:25,469 INFO L85 PathProgramCache]: Analyzing trace with hash -387519729, now seen corresponding path program 80 times [2022-01-31 17:17:25,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:17:25,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [752953855] [2022-01-31 17:17:25,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:17:25,471 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:17:25,471 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:17:25,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:17:25,484 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:17:25,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:17:27,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:17:27,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:17:27,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:17:27,406 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:17:27,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [752953855] [2022-01-31 17:17:27,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [752953855] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:17:27,406 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:17:27,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-01-31 17:17:27,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784776463] [2022-01-31 17:17:27,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:17:27,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-01-31 17:17:27,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:17:27,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-01-31 17:17:27,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 17:17:27,408 INFO L87 Difference]: Start difference. First operand 208 states and 214 transitions. Second operand has 84 states, 84 states have (on average 2.25) internal successors, (189), 83 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 17:17:29,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:17:29,678 INFO L93 Difference]: Finished difference Result 252 states and 264 transitions. [2022-01-31 17:17:29,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-31 17:17:29,678 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.25) internal successors, (189), 83 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 203 [2022-01-31 17:17:29,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:17:29,679 INFO L225 Difference]: With dead ends: 252 [2022-01-31 17:17:29,679 INFO L226 Difference]: Without dead ends: 211 [2022-01-31 17:17:29,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3320 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=10209, Invalid=16851, Unknown=0, NotChecked=0, Total=27060 [2022-01-31 17:17:29,682 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 195 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:17:29,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 84 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 454 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:17:29,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-01-31 17:17:29,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 210. [2022-01-31 17:17:29,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 204 states have (on average 1.0343137254901962) internal successors, (211), 204 states have internal predecessors, (211), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:17:29,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 216 transitions. [2022-01-31 17:17:29,757 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 216 transitions. Word has length 203 [2022-01-31 17:17:29,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:17:29,757 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 216 transitions. [2022-01-31 17:17:29,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.25) internal successors, (189), 83 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 17:17:29,757 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 216 transitions. [2022-01-31 17:17:29,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-01-31 17:17:29,758 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:17:29,758 INFO L514 BasicCegarLoop]: trace histogram [81, 81, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:17:29,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-01-31 17:17:29,758 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:17:29,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:17:29,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1369605165, now seen corresponding path program 81 times [2022-01-31 17:17:29,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:17:29,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [688965241] [2022-01-31 17:17:29,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:17:29,760 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:17:29,760 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:17:29,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:17:29,774 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:17:29,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:17:31,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:17:31,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:17:31,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:17:31,439 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:17:31,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [688965241] [2022-01-31 17:17:31,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [688965241] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:17:31,439 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:17:31,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-01-31 17:17:31,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246937471] [2022-01-31 17:17:31,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:17:31,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-01-31 17:17:31,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:17:31,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-01-31 17:17:31,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3488, Invalid=3652, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 17:17:31,441 INFO L87 Difference]: Start difference. First operand 210 states and 216 transitions. Second operand has 85 states, 85 states have (on average 2.2470588235294118) internal successors, (191), 84 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 17:17:33,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:17:33,392 INFO L93 Difference]: Finished difference Result 254 states and 266 transitions. [2022-01-31 17:17:33,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-01-31 17:17:33,393 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.2470588235294118) internal successors, (191), 84 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 205 [2022-01-31 17:17:33,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:17:33,400 INFO L225 Difference]: With dead ends: 254 [2022-01-31 17:17:33,400 INFO L226 Difference]: Without dead ends: 213 [2022-01-31 17:17:33,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3402 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=10458, Invalid=17264, Unknown=0, NotChecked=0, Total=27722 [2022-01-31 17:17:33,402 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 197 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:17:33,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 64 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:17:33,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-01-31 17:17:33,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 212. [2022-01-31 17:17:33,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 206 states have (on average 1.0339805825242718) internal successors, (213), 206 states have internal predecessors, (213), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:17:33,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 218 transitions. [2022-01-31 17:17:33,452 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 218 transitions. Word has length 205 [2022-01-31 17:17:33,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:17:33,452 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 218 transitions. [2022-01-31 17:17:33,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.2470588235294118) internal successors, (191), 84 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 17:17:33,453 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 218 transitions. [2022-01-31 17:17:33,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-01-31 17:17:33,455 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:17:33,455 INFO L514 BasicCegarLoop]: trace histogram [82, 82, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:17:33,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-01-31 17:17:33,455 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:17:33,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:17:33,455 INFO L85 PathProgramCache]: Analyzing trace with hash 2044480971, now seen corresponding path program 82 times [2022-01-31 17:17:33,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:17:33,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [298233775] [2022-01-31 17:17:33,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:17:33,457 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:17:33,457 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:17:33,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:17:33,475 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:17:33,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:17:35,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:17:35,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:17:35,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:17:35,176 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:17:35,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [298233775] [2022-01-31 17:17:35,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [298233775] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:17:35,176 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:17:35,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-01-31 17:17:35,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14690631] [2022-01-31 17:17:35,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:17:35,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-01-31 17:17:35,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:17:35,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-01-31 17:17:35,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2022-01-31 17:17:35,180 INFO L87 Difference]: Start difference. First operand 212 states and 218 transitions. Second operand has 86 states, 86 states have (on average 2.244186046511628) internal successors, (193), 85 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 17:17:37,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:17:37,277 INFO L93 Difference]: Finished difference Result 256 states and 268 transitions. [2022-01-31 17:17:37,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-31 17:17:37,278 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.244186046511628) internal successors, (193), 85 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 207 [2022-01-31 17:17:37,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:17:37,279 INFO L225 Difference]: With dead ends: 256 [2022-01-31 17:17:37,279 INFO L226 Difference]: Without dead ends: 215 [2022-01-31 17:17:37,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3485 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=10710, Invalid=17682, Unknown=0, NotChecked=0, Total=28392 [2022-01-31 17:17:37,283 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 199 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:17:37,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 69 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:17:37,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-01-31 17:17:37,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 214. [2022-01-31 17:17:37,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 208 states have (on average 1.0336538461538463) internal successors, (215), 208 states have internal predecessors, (215), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:17:37,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 220 transitions. [2022-01-31 17:17:37,328 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 220 transitions. Word has length 207 [2022-01-31 17:17:37,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:17:37,328 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 220 transitions. [2022-01-31 17:17:37,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.244186046511628) internal successors, (193), 85 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 17:17:37,328 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 220 transitions. [2022-01-31 17:17:37,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-01-31 17:17:37,329 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:17:37,330 INFO L514 BasicCegarLoop]: trace histogram [83, 83, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:17:37,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-01-31 17:17:37,330 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:17:37,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:17:37,330 INFO L85 PathProgramCache]: Analyzing trace with hash 2060068841, now seen corresponding path program 83 times [2022-01-31 17:17:37,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:17:37,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1826378841] [2022-01-31 17:17:37,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:17:37,332 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:17:37,332 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:17:37,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:17:37,344 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:17:37,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:17:38,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:17:38,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:17:38,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:17:38,873 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:17:38,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1826378841] [2022-01-31 17:17:38,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1826378841] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:17:38,873 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:17:38,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-01-31 17:17:38,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759045028] [2022-01-31 17:17:38,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:17:38,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-01-31 17:17:38,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:17:38,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-01-31 17:17:38,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3657, Invalid=3825, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 17:17:38,874 INFO L87 Difference]: Start difference. First operand 214 states and 220 transitions. Second operand has 87 states, 87 states have (on average 2.2413793103448274) internal successors, (195), 86 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 17:17:40,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:17:40,741 INFO L93 Difference]: Finished difference Result 258 states and 270 transitions. [2022-01-31 17:17:40,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-01-31 17:17:40,741 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.2413793103448274) internal successors, (195), 86 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 209 [2022-01-31 17:17:40,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:17:40,742 INFO L225 Difference]: With dead ends: 258 [2022-01-31 17:17:40,742 INFO L226 Difference]: Without dead ends: 217 [2022-01-31 17:17:40,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3569 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=10965, Invalid=18105, Unknown=0, NotChecked=0, Total=29070 [2022-01-31 17:17:40,745 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 201 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:17:40,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 74 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:17:40,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-01-31 17:17:40,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 216. [2022-01-31 17:17:40,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 210 states have (on average 1.0333333333333334) internal successors, (217), 210 states have internal predecessors, (217), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:17:40,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 222 transitions. [2022-01-31 17:17:40,808 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 222 transitions. Word has length 209 [2022-01-31 17:17:40,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:17:40,809 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 222 transitions. [2022-01-31 17:17:40,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 2.2413793103448274) internal successors, (195), 86 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 17:17:40,809 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 222 transitions. [2022-01-31 17:17:40,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-01-31 17:17:40,809 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:17:40,809 INFO L514 BasicCegarLoop]: trace histogram [84, 84, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:17:40,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-01-31 17:17:40,810 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:17:40,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:17:40,810 INFO L85 PathProgramCache]: Analyzing trace with hash -139857273, now seen corresponding path program 84 times [2022-01-31 17:17:40,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:17:40,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1300822825] [2022-01-31 17:17:40,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:17:40,811 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:17:40,811 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:17:40,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:17:40,826 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:17:40,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:17:42,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:17:42,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:17:42,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:17:42,806 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:17:42,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1300822825] [2022-01-31 17:17:42,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1300822825] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:17:42,806 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:17:42,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-01-31 17:17:42,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157211325] [2022-01-31 17:17:42,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:17:42,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-01-31 17:17:42,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:17:42,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-01-31 17:17:42,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2022-01-31 17:17:42,808 INFO L87 Difference]: Start difference. First operand 216 states and 222 transitions. Second operand has 88 states, 88 states have (on average 2.2386363636363638) internal successors, (197), 87 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 17:17:44,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:17:44,781 INFO L93 Difference]: Finished difference Result 260 states and 272 transitions. [2022-01-31 17:17:44,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-01-31 17:17:44,781 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.2386363636363638) internal successors, (197), 87 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 211 [2022-01-31 17:17:44,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:17:44,781 INFO L225 Difference]: With dead ends: 260 [2022-01-31 17:17:44,782 INFO L226 Difference]: Without dead ends: 219 [2022-01-31 17:17:44,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3654 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=11223, Invalid=18533, Unknown=0, NotChecked=0, Total=29756 [2022-01-31 17:17:44,783 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 203 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:17:44,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 59 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:17:44,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-01-31 17:17:44,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 218. [2022-01-31 17:17:44,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 212 states have (on average 1.0330188679245282) internal successors, (219), 212 states have internal predecessors, (219), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:17:44,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 224 transitions. [2022-01-31 17:17:44,831 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 224 transitions. Word has length 211 [2022-01-31 17:17:44,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:17:44,832 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 224 transitions. [2022-01-31 17:17:44,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 2.2386363636363638) internal successors, (197), 87 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 17:17:44,832 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 224 transitions. [2022-01-31 17:17:44,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-01-31 17:17:44,832 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:17:44,832 INFO L514 BasicCegarLoop]: trace histogram [85, 85, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:17:44,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-01-31 17:17:44,833 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:17:44,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:17:44,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1144943195, now seen corresponding path program 85 times [2022-01-31 17:17:44,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:17:44,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [539615046] [2022-01-31 17:17:44,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:17:44,834 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:17:44,834 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:17:44,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:17:44,848 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:17:44,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:17:46,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:17:46,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:17:46,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:17:46,753 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:17:46,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [539615046] [2022-01-31 17:17:46,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [539615046] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:17:46,753 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:17:46,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-01-31 17:17:46,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585842967] [2022-01-31 17:17:46,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:17:46,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-01-31 17:17:46,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:17:46,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-01-31 17:17:46,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3830, Invalid=4002, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 17:17:46,755 INFO L87 Difference]: Start difference. First operand 218 states and 224 transitions. Second operand has 89 states, 89 states have (on average 2.235955056179775) internal successors, (199), 88 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 17:17:48,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:17:48,820 INFO L93 Difference]: Finished difference Result 262 states and 274 transitions. [2022-01-31 17:17:48,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-31 17:17:48,821 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.235955056179775) internal successors, (199), 88 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 213 [2022-01-31 17:17:48,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:17:48,821 INFO L225 Difference]: With dead ends: 262 [2022-01-31 17:17:48,821 INFO L226 Difference]: Without dead ends: 221 [2022-01-31 17:17:48,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3740 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=11484, Invalid=18966, Unknown=0, NotChecked=0, Total=30450 [2022-01-31 17:17:48,824 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 205 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:17:48,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 84 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:17:48,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-01-31 17:17:48,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 220. [2022-01-31 17:17:48,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 214 states have (on average 1.0327102803738317) internal successors, (221), 214 states have internal predecessors, (221), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:17:48,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 226 transitions. [2022-01-31 17:17:48,872 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 226 transitions. Word has length 213 [2022-01-31 17:17:48,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:17:48,873 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 226 transitions. [2022-01-31 17:17:48,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.235955056179775) internal successors, (199), 88 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 17:17:48,873 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 226 transitions. [2022-01-31 17:17:48,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-01-31 17:17:48,873 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:17:48,874 INFO L514 BasicCegarLoop]: trace histogram [86, 86, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:17:48,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-01-31 17:17:48,874 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:17:48,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:17:48,874 INFO L85 PathProgramCache]: Analyzing trace with hash -664872637, now seen corresponding path program 86 times [2022-01-31 17:17:48,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:17:48,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [169869138] [2022-01-31 17:17:48,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:17:48,875 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:17:48,875 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:17:48,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:17:48,890 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:17:48,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:17:50,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:17:50,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:17:50,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:17:50,885 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:17:50,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [169869138] [2022-01-31 17:17:50,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [169869138] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:17:50,885 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:17:50,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-01-31 17:17:50,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753412456] [2022-01-31 17:17:50,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:17:50,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-01-31 17:17:50,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:17:50,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-01-31 17:17:50,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3918, Invalid=4092, Unknown=0, NotChecked=0, Total=8010 [2022-01-31 17:17:50,886 INFO L87 Difference]: Start difference. First operand 220 states and 226 transitions. Second operand has 90 states, 90 states have (on average 2.2333333333333334) internal successors, (201), 89 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 17:17:52,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:17:53,000 INFO L93 Difference]: Finished difference Result 264 states and 276 transitions. [2022-01-31 17:17:53,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-01-31 17:17:53,000 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.2333333333333334) internal successors, (201), 89 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 215 [2022-01-31 17:17:53,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:17:53,001 INFO L225 Difference]: With dead ends: 264 [2022-01-31 17:17:53,001 INFO L226 Difference]: Without dead ends: 223 [2022-01-31 17:17:53,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3827 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=11748, Invalid=19404, Unknown=0, NotChecked=0, Total=31152 [2022-01-31 17:17:53,004 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 207 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:17:53,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 59 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:17:53,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-01-31 17:17:53,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 222. [2022-01-31 17:17:53,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 216 states have (on average 1.0324074074074074) internal successors, (223), 216 states have internal predecessors, (223), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:17:53,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 228 transitions. [2022-01-31 17:17:53,055 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 228 transitions. Word has length 215 [2022-01-31 17:17:53,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:17:53,055 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 228 transitions. [2022-01-31 17:17:53,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.2333333333333334) internal successors, (201), 89 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 17:17:53,055 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 228 transitions. [2022-01-31 17:17:53,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2022-01-31 17:17:53,056 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:17:53,056 INFO L514 BasicCegarLoop]: trace histogram [87, 87, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:17:53,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-01-31 17:17:53,056 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:17:53,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:17:53,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1121432929, now seen corresponding path program 87 times [2022-01-31 17:17:53,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:17:53,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1468620024] [2022-01-31 17:17:53,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:17:53,058 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:17:53,058 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:17:53,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:17:53,072 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:17:53,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:17:54,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:17:54,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:17:54,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:17:54,739 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:17:54,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1468620024] [2022-01-31 17:17:54,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1468620024] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:17:54,739 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:17:54,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-01-31 17:17:54,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646128047] [2022-01-31 17:17:54,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:17:54,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-01-31 17:17:54,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:17:54,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-01-31 17:17:54,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4007, Invalid=4183, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 17:17:54,741 INFO L87 Difference]: Start difference. First operand 222 states and 228 transitions. Second operand has 91 states, 91 states have (on average 2.230769230769231) internal successors, (203), 90 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 17:17:56,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:17:56,833 INFO L93 Difference]: Finished difference Result 266 states and 278 transitions. [2022-01-31 17:17:56,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-01-31 17:17:56,833 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.230769230769231) internal successors, (203), 90 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 217 [2022-01-31 17:17:56,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:17:56,834 INFO L225 Difference]: With dead ends: 266 [2022-01-31 17:17:56,834 INFO L226 Difference]: Without dead ends: 225 [2022-01-31 17:17:56,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3915 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=12015, Invalid=19847, Unknown=0, NotChecked=0, Total=31862 [2022-01-31 17:17:56,835 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 209 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:17:56,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 64 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:17:56,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-01-31 17:17:56,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 224. [2022-01-31 17:17:56,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 218 states have (on average 1.0321100917431192) internal successors, (225), 218 states have internal predecessors, (225), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:17:56,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 230 transitions. [2022-01-31 17:17:56,885 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 230 transitions. Word has length 217 [2022-01-31 17:17:56,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:17:56,885 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 230 transitions. [2022-01-31 17:17:56,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.230769230769231) internal successors, (203), 90 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 17:17:56,885 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 230 transitions. [2022-01-31 17:17:56,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-01-31 17:17:56,886 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:17:56,886 INFO L514 BasicCegarLoop]: trace histogram [88, 88, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:17:56,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2022-01-31 17:17:56,886 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:17:56,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:17:56,886 INFO L85 PathProgramCache]: Analyzing trace with hash -225836545, now seen corresponding path program 88 times [2022-01-31 17:17:56,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:17:56,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1896964322] [2022-01-31 17:17:56,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:17:56,887 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:17:56,887 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:17:56,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:17:56,901 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:17:56,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:17:58,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:17:58,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:17:58,495 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 17:17:58,495 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:17:58,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1896964322] [2022-01-31 17:17:58,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1896964322] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:17:58,495 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:17:58,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-01-31 17:17:58,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287677069] [2022-01-31 17:17:58,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:17:58,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-01-31 17:17:58,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:17:58,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-01-31 17:17:58,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2022-01-31 17:17:58,498 INFO L87 Difference]: Start difference. First operand 224 states and 230 transitions. Second operand has 92 states, 92 states have (on average 2.2282608695652173) internal successors, (205), 91 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 17:18:00,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:18:00,699 INFO L93 Difference]: Finished difference Result 268 states and 280 transitions. [2022-01-31 17:18:00,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-01-31 17:18:00,699 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.2282608695652173) internal successors, (205), 91 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 219 [2022-01-31 17:18:00,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:18:00,700 INFO L225 Difference]: With dead ends: 268 [2022-01-31 17:18:00,700 INFO L226 Difference]: Without dead ends: 227 [2022-01-31 17:18:00,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4004 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=12285, Invalid=20295, Unknown=0, NotChecked=0, Total=32580 [2022-01-31 17:18:00,703 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 211 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:18:00,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 69 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:18:00,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-01-31 17:18:00,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 226. [2022-01-31 17:18:00,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 220 states have (on average 1.0318181818181817) internal successors, (227), 220 states have internal predecessors, (227), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:18:00,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 232 transitions. [2022-01-31 17:18:00,768 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 232 transitions. Word has length 219 [2022-01-31 17:18:00,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:18:00,768 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 232 transitions. [2022-01-31 17:18:00,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.2282608695652173) internal successors, (205), 91 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 17:18:00,768 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 232 transitions. [2022-01-31 17:18:00,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-01-31 17:18:00,769 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:18:00,769 INFO L514 BasicCegarLoop]: trace histogram [89, 89, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:18:00,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2022-01-31 17:18:00,769 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:18:00,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:18:00,769 INFO L85 PathProgramCache]: Analyzing trace with hash 2128322333, now seen corresponding path program 89 times [2022-01-31 17:18:00,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:18:00,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [806134690] [2022-01-31 17:18:00,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:18:00,771 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:18:00,771 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:18:00,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:18:00,784 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:18:00,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:18:03,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:18:03,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:18:03,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:18:03,462 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:18:03,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [806134690] [2022-01-31 17:18:03,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [806134690] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:18:03,463 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:18:03,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-01-31 17:18:03,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168075531] [2022-01-31 17:18:03,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:18:03,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-01-31 17:18:03,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:18:03,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-01-31 17:18:03,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4188, Invalid=4368, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 17:18:03,465 INFO L87 Difference]: Start difference. First operand 226 states and 232 transitions. Second operand has 93 states, 93 states have (on average 2.225806451612903) internal successors, (207), 92 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 17:18:05,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:18:05,996 INFO L93 Difference]: Finished difference Result 270 states and 282 transitions. [2022-01-31 17:18:05,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-01-31 17:18:05,996 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 2.225806451612903) internal successors, (207), 92 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 221 [2022-01-31 17:18:05,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:18:05,997 INFO L225 Difference]: With dead ends: 270 [2022-01-31 17:18:05,997 INFO L226 Difference]: Without dead ends: 229 [2022-01-31 17:18:06,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4094 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=12558, Invalid=20748, Unknown=0, NotChecked=0, Total=33306 [2022-01-31 17:18:06,001 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 213 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:18:06,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 64 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:18:06,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-01-31 17:18:06,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 228. [2022-01-31 17:18:06,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 222 states have (on average 1.0315315315315314) internal successors, (229), 222 states have internal predecessors, (229), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:18:06,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 234 transitions. [2022-01-31 17:18:06,083 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 234 transitions. Word has length 221 [2022-01-31 17:18:06,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:18:06,083 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 234 transitions. [2022-01-31 17:18:06,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 2.225806451612903) internal successors, (207), 92 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 17:18:06,083 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 234 transitions. [2022-01-31 17:18:06,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2022-01-31 17:18:06,084 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:18:06,084 INFO L514 BasicCegarLoop]: trace histogram [90, 90, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:18:06,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2022-01-31 17:18:06,084 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:18:06,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:18:06,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1027239099, now seen corresponding path program 90 times [2022-01-31 17:18:06,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:18:06,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [754722804] [2022-01-31 17:18:06,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:18:06,086 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:18:06,086 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:18:06,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:18:06,099 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:18:06,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:18:07,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:18:07,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:18:07,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:18:07,832 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:18:07,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [754722804] [2022-01-31 17:18:07,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [754722804] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:18:07,832 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:18:07,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-01-31 17:18:07,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754598197] [2022-01-31 17:18:07,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:18:07,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-01-31 17:18:07,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:18:07,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-01-31 17:18:07,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4280, Invalid=4462, Unknown=0, NotChecked=0, Total=8742 [2022-01-31 17:18:07,834 INFO L87 Difference]: Start difference. First operand 228 states and 234 transitions. Second operand has 94 states, 94 states have (on average 2.223404255319149) internal successors, (209), 93 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 17:18:10,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:18:10,062 INFO L93 Difference]: Finished difference Result 272 states and 284 transitions. [2022-01-31 17:18:10,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-01-31 17:18:10,062 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.223404255319149) internal successors, (209), 93 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 223 [2022-01-31 17:18:10,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:18:10,063 INFO L225 Difference]: With dead ends: 272 [2022-01-31 17:18:10,063 INFO L226 Difference]: Without dead ends: 231 [2022-01-31 17:18:10,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4185 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=12834, Invalid=21206, Unknown=0, NotChecked=0, Total=34040 [2022-01-31 17:18:10,065 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 215 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:18:10,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 64 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:18:10,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-01-31 17:18:10,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 230. [2022-01-31 17:18:10,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 224 states have (on average 1.03125) internal successors, (231), 224 states have internal predecessors, (231), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:18:10,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 236 transitions. [2022-01-31 17:18:10,122 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 236 transitions. Word has length 223 [2022-01-31 17:18:10,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:18:10,122 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 236 transitions. [2022-01-31 17:18:10,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 2.223404255319149) internal successors, (209), 93 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 17:18:10,122 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 236 transitions. [2022-01-31 17:18:10,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2022-01-31 17:18:10,123 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:18:10,123 INFO L514 BasicCegarLoop]: trace histogram [91, 91, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:18:10,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2022-01-31 17:18:10,123 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:18:10,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:18:10,123 INFO L85 PathProgramCache]: Analyzing trace with hash -551793959, now seen corresponding path program 91 times [2022-01-31 17:18:10,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:18:10,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [893814999] [2022-01-31 17:18:10,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:18:10,125 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:18:10,125 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:18:10,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:18:10,140 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:18:10,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:18:12,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:18:12,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:18:12,175 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 17:18:12,175 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:18:12,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [893814999] [2022-01-31 17:18:12,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [893814999] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:18:12,175 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:18:12,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-01-31 17:18:12,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532937375] [2022-01-31 17:18:12,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:18:12,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-01-31 17:18:12,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:18:12,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-01-31 17:18:12,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4373, Invalid=4557, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 17:18:12,177 INFO L87 Difference]: Start difference. First operand 230 states and 236 transitions. Second operand has 95 states, 95 states have (on average 2.221052631578947) internal successors, (211), 94 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 17:18:14,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:18:14,312 INFO L93 Difference]: Finished difference Result 274 states and 286 transitions. [2022-01-31 17:18:14,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-01-31 17:18:14,312 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.221052631578947) internal successors, (211), 94 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 225 [2022-01-31 17:18:14,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:18:14,313 INFO L225 Difference]: With dead ends: 274 [2022-01-31 17:18:14,313 INFO L226 Difference]: Without dead ends: 233 [2022-01-31 17:18:14,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4277 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=13113, Invalid=21669, Unknown=0, NotChecked=0, Total=34782 [2022-01-31 17:18:14,317 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 217 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:18:14,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 69 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:18:14,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-01-31 17:18:14,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 232. [2022-01-31 17:18:14,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 226 states have (on average 1.0309734513274336) internal successors, (233), 226 states have internal predecessors, (233), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:18:14,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 238 transitions. [2022-01-31 17:18:14,400 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 238 transitions. Word has length 225 [2022-01-31 17:18:14,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:18:14,400 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 238 transitions. [2022-01-31 17:18:14,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.221052631578947) internal successors, (211), 94 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 17:18:14,400 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 238 transitions. [2022-01-31 17:18:14,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2022-01-31 17:18:14,401 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:18:14,401 INFO L514 BasicCegarLoop]: trace histogram [92, 92, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:18:14,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2022-01-31 17:18:14,401 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:18:14,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:18:14,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1879107209, now seen corresponding path program 92 times [2022-01-31 17:18:14,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:18:14,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [815160623] [2022-01-31 17:18:14,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:18:14,402 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:18:14,403 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:18:14,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:18:14,416 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:18:14,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:18:16,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:18:16,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:18:16,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:18:16,514 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:18:16,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [815160623] [2022-01-31 17:18:16,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [815160623] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:18:16,514 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:18:16,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-01-31 17:18:16,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876760164] [2022-01-31 17:18:16,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:18:16,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-01-31 17:18:16,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:18:16,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-01-31 17:18:16,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2022-01-31 17:18:16,517 INFO L87 Difference]: Start difference. First operand 232 states and 238 transitions. Second operand has 96 states, 96 states have (on average 2.21875) internal successors, (213), 95 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 17:18:19,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:18:19,046 INFO L93 Difference]: Finished difference Result 276 states and 288 transitions. [2022-01-31 17:18:19,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-01-31 17:18:19,046 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.21875) internal successors, (213), 95 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 227 [2022-01-31 17:18:19,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:18:19,047 INFO L225 Difference]: With dead ends: 276 [2022-01-31 17:18:19,047 INFO L226 Difference]: Without dead ends: 235 [2022-01-31 17:18:19,053 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 17:18:19,053 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 219 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:18:19,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 74 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:18:19,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-01-31 17:18:19,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 234. [2022-01-31 17:18:19,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 228 states have (on average 1.030701754385965) internal successors, (235), 228 states have internal predecessors, (235), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:18:19,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 240 transitions. [2022-01-31 17:18:19,111 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 240 transitions. Word has length 227 [2022-01-31 17:18:19,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:18:19,111 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 240 transitions. [2022-01-31 17:18:19,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.21875) internal successors, (213), 95 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 17:18:19,111 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 240 transitions. [2022-01-31 17:18:19,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2022-01-31 17:18:19,112 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:18:19,112 INFO L514 BasicCegarLoop]: trace histogram [93, 93, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:18:19,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2022-01-31 17:18:19,112 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:18:19,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:18:19,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1821853547, now seen corresponding path program 93 times [2022-01-31 17:18:19,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:18:19,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [607141921] [2022-01-31 17:18:19,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:18:19,114 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:18:19,114 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:18:19,114 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:18:19,128 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:18:19,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:18:21,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:18:21,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:18:21,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:18:21,982 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:18:21,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [607141921] [2022-01-31 17:18:21,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [607141921] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:18:21,982 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:18:21,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-01-31 17:18:21,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941436977] [2022-01-31 17:18:21,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:18:21,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-01-31 17:18:21,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:18:21,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-01-31 17:18:21,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4562, Invalid=4750, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 17:18:21,984 INFO L87 Difference]: Start difference. First operand 234 states and 240 transitions. Second operand has 97 states, 97 states have (on average 2.216494845360825) internal successors, (215), 96 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 17:18:24,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:18:24,729 INFO L93 Difference]: Finished difference Result 278 states and 290 transitions. [2022-01-31 17:18:24,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-31 17:18:24,730 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.216494845360825) internal successors, (215), 96 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 229 [2022-01-31 17:18:24,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:18:24,730 INFO L225 Difference]: With dead ends: 278 [2022-01-31 17:18:24,730 INFO L226 Difference]: Without dead ends: 237 [2022-01-31 17:18:24,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4464 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=13680, Invalid=22610, Unknown=0, NotChecked=0, Total=36290 [2022-01-31 17:18:24,732 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 221 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:18:24,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 54 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:18:24,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-01-31 17:18:24,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 236. [2022-01-31 17:18:24,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 230 states have (on average 1.0304347826086957) internal successors, (237), 230 states have internal predecessors, (237), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:18:24,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 242 transitions. [2022-01-31 17:18:24,788 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 242 transitions. Word has length 229 [2022-01-31 17:18:24,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:18:24,788 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 242 transitions. [2022-01-31 17:18:24,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.216494845360825) internal successors, (215), 96 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 17:18:24,788 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 242 transitions. [2022-01-31 17:18:24,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2022-01-31 17:18:24,789 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:18:24,789 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:18:24,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2022-01-31 17:18:24,789 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:18:24,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:18:24,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1659308083, now seen corresponding path program 94 times [2022-01-31 17:18:24,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:18:24,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1355736807] [2022-01-31 17:18:24,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:18:24,791 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:18:24,791 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:18:24,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:18:24,805 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:18:24,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:18:26,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:18:26,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:18:26,653 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 17:18:26,653 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:18:26,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1355736807] [2022-01-31 17:18:26,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1355736807] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:18:26,653 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:18:26,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-01-31 17:18:26,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729014141] [2022-01-31 17:18:26,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:18:26,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-01-31 17:18:26,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:18:26,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-01-31 17:18:26,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 17:18:26,655 INFO L87 Difference]: Start difference. First operand 236 states and 242 transitions. Second operand has 98 states, 98 states have (on average 2.2142857142857144) internal successors, (217), 97 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 17:18:28,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:18:28,916 INFO L93 Difference]: Finished difference Result 280 states and 292 transitions. [2022-01-31 17:18:28,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-01-31 17:18:28,916 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.2142857142857144) internal successors, (217), 97 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 231 [2022-01-31 17:18:28,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:18:28,917 INFO L225 Difference]: With dead ends: 280 [2022-01-31 17:18:28,917 INFO L226 Difference]: Without dead ends: 239 [2022-01-31 17:18:28,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4559 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=13968, Invalid=23088, Unknown=0, NotChecked=0, Total=37056 [2022-01-31 17:18:28,921 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 223 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:18:28,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 49 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:18:28,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-01-31 17:18:28,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 238. [2022-01-31 17:18:28,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 232 states have (on average 1.0301724137931034) internal successors, (239), 232 states have internal predecessors, (239), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:18:28,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 244 transitions. [2022-01-31 17:18:28,977 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 244 transitions. Word has length 231 [2022-01-31 17:18:28,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:18:28,978 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 244 transitions. [2022-01-31 17:18:28,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.2142857142857144) internal successors, (217), 97 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 17:18:28,978 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 244 transitions. [2022-01-31 17:18:28,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2022-01-31 17:18:28,978 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:18:28,978 INFO L514 BasicCegarLoop]: trace histogram [95, 95, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:18:28,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2022-01-31 17:18:28,979 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:18:28,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:18:28,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1276110929, now seen corresponding path program 95 times [2022-01-31 17:18:28,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:18:28,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [721543082] [2022-01-31 17:18:28,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:18:28,981 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:18:28,981 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:18:28,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:18:28,995 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:18:29,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:18:31,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:18:31,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:18:31,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:18:31,661 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:18:31,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [721543082] [2022-01-31 17:18:31,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [721543082] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:18:31,661 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:18:31,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-01-31 17:18:31,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079981014] [2022-01-31 17:18:31,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:18:31,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-01-31 17:18:31,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:18:31,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-01-31 17:18:31,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4755, Invalid=4947, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 17:18:31,664 INFO L87 Difference]: Start difference. First operand 238 states and 244 transitions. Second operand has 99 states, 99 states have (on average 2.212121212121212) internal successors, (219), 98 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 17:18:34,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:18:34,729 INFO L93 Difference]: Finished difference Result 282 states and 294 transitions. [2022-01-31 17:18:34,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-01-31 17:18:34,729 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.212121212121212) internal successors, (219), 98 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 233 [2022-01-31 17:18:34,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:18:34,730 INFO L225 Difference]: With dead ends: 282 [2022-01-31 17:18:34,730 INFO L226 Difference]: Without dead ends: 241 [2022-01-31 17:18:34,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4655 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=14259, Invalid=23571, Unknown=0, NotChecked=0, Total=37830 [2022-01-31 17:18:34,732 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 225 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:18:34,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 69 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:18:34,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-01-31 17:18:34,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 240. [2022-01-31 17:18:34,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 234 states have (on average 1.0299145299145298) internal successors, (241), 234 states have internal predecessors, (241), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:18:34,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 246 transitions. [2022-01-31 17:18:34,790 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 246 transitions. Word has length 233 [2022-01-31 17:18:34,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:18:34,790 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 246 transitions. [2022-01-31 17:18:34,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.212121212121212) internal successors, (219), 98 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 17:18:34,791 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 246 transitions. [2022-01-31 17:18:34,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-01-31 17:18:34,793 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:18:34,793 INFO L514 BasicCegarLoop]: trace histogram [96, 96, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:18:34,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2022-01-31 17:18:34,793 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:18:34,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:18:34,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1904133905, now seen corresponding path program 96 times [2022-01-31 17:18:34,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:18:34,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1672715149] [2022-01-31 17:18:34,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:18:34,795 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:18:34,795 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:18:34,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:18:34,810 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:18:34,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:18:37,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:18:37,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:18:37,114 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 17:18:37,114 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:18:37,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1672715149] [2022-01-31 17:18:37,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1672715149] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:18:37,115 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:18:37,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-01-31 17:18:37,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032723957] [2022-01-31 17:18:37,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:18:37,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-01-31 17:18:37,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:18:37,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-01-31 17:18:37,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2022-01-31 17:18:37,116 INFO L87 Difference]: Start difference. First operand 240 states and 246 transitions. Second operand has 100 states, 100 states have (on average 2.21) internal successors, (221), 99 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 17:18:39,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:18:39,856 INFO L93 Difference]: Finished difference Result 284 states and 296 transitions. [2022-01-31 17:18:39,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-01-31 17:18:39,856 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.21) internal successors, (221), 99 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 235 [2022-01-31 17:18:39,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:18:39,857 INFO L225 Difference]: With dead ends: 284 [2022-01-31 17:18:39,857 INFO L226 Difference]: Without dead ends: 243 [2022-01-31 17:18:39,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4752 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=14553, Invalid=24059, Unknown=0, NotChecked=0, Total=38612 [2022-01-31 17:18:39,860 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 227 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:18:39,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 69 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:18:39,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-01-31 17:18:39,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 242. [2022-01-31 17:18:39,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 236 states have (on average 1.0296610169491525) internal successors, (243), 236 states have internal predecessors, (243), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:18:39,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 248 transitions. [2022-01-31 17:18:39,937 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 248 transitions. Word has length 235 [2022-01-31 17:18:39,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:18:39,937 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 248 transitions. [2022-01-31 17:18:39,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 2.21) internal successors, (221), 99 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 17:18:39,937 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 248 transitions. [2022-01-31 17:18:39,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2022-01-31 17:18:39,938 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:18:39,938 INFO L514 BasicCegarLoop]: trace histogram [97, 97, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:18:39,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2022-01-31 17:18:39,938 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:18:39,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:18:39,938 INFO L85 PathProgramCache]: Analyzing trace with hash -102704627, now seen corresponding path program 97 times [2022-01-31 17:18:39,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:18:39,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [451187372] [2022-01-31 17:18:39,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:18:39,940 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:18:39,940 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:18:39,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:18:39,955 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:18:40,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:18:41,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:18:41,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:18:41,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:18:41,907 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:18:41,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [451187372] [2022-01-31 17:18:41,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [451187372] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:18:41,907 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:18:41,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-01-31 17:18:41,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640120692] [2022-01-31 17:18:41,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:18:41,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-01-31 17:18:41,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:18:41,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-01-31 17:18:41,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4952, Invalid=5148, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 17:18:41,912 INFO L87 Difference]: Start difference. First operand 242 states and 248 transitions. Second operand has 101 states, 101 states have (on average 2.207920792079208) internal successors, (223), 100 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 17:18:45,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:18:45,039 INFO L93 Difference]: Finished difference Result 286 states and 298 transitions. [2022-01-31 17:18:45,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-01-31 17:18:45,040 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.207920792079208) internal successors, (223), 100 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 237 [2022-01-31 17:18:45,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:18:45,043 INFO L225 Difference]: With dead ends: 286 [2022-01-31 17:18:45,043 INFO L226 Difference]: Without dead ends: 245 [2022-01-31 17:18:45,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4850 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=14850, Invalid=24552, Unknown=0, NotChecked=0, Total=39402 [2022-01-31 17:18:45,046 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 229 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:18:45,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 79 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:18:45,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-01-31 17:18:45,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 244. [2022-01-31 17:18:45,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 238 states have (on average 1.0294117647058822) internal successors, (245), 238 states have internal predecessors, (245), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:18:45,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 250 transitions. [2022-01-31 17:18:45,107 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 250 transitions. Word has length 237 [2022-01-31 17:18:45,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:18:45,107 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 250 transitions. [2022-01-31 17:18:45,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.207920792079208) internal successors, (223), 100 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 17:18:45,108 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 250 transitions. [2022-01-31 17:18:45,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-01-31 17:18:45,110 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:18:45,110 INFO L514 BasicCegarLoop]: trace histogram [98, 98, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:18:45,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2022-01-31 17:18:45,110 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:18:45,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:18:45,110 INFO L85 PathProgramCache]: Analyzing trace with hash 199011243, now seen corresponding path program 98 times [2022-01-31 17:18:45,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:18:45,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1060862711] [2022-01-31 17:18:45,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:18:45,113 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:18:45,113 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:18:45,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:18:45,128 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:18:45,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:18:47,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:18:47,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:18:47,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:18:47,545 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:18:47,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1060862711] [2022-01-31 17:18:47,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1060862711] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:18:47,545 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:18:47,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2022-01-31 17:18:47,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173557132] [2022-01-31 17:18:47,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:18:47,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-01-31 17:18:47,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:18:47,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-01-31 17:18:47,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2022-01-31 17:18:47,548 INFO L87 Difference]: Start difference. First operand 244 states and 250 transitions. Second operand has 102 states, 102 states have (on average 2.2058823529411766) internal successors, (225), 101 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 17:18:50,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:18:50,167 INFO L93 Difference]: Finished difference Result 288 states and 300 transitions. [2022-01-31 17:18:50,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-01-31 17:18:50,168 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.2058823529411766) internal successors, (225), 101 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 239 [2022-01-31 17:18:50,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:18:50,169 INFO L225 Difference]: With dead ends: 288 [2022-01-31 17:18:50,169 INFO L226 Difference]: Without dead ends: 247 [2022-01-31 17:18:50,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4949 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=15150, Invalid=25050, Unknown=0, NotChecked=0, Total=40200 [2022-01-31 17:18:50,172 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 231 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:18:50,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 64 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:18:50,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-01-31 17:18:50,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 246. [2022-01-31 17:18:50,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 240 states have (on average 1.0291666666666666) internal successors, (247), 240 states have internal predecessors, (247), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:18:50,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 252 transitions. [2022-01-31 17:18:50,234 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 252 transitions. Word has length 239 [2022-01-31 17:18:50,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:18:50,236 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 252 transitions. [2022-01-31 17:18:50,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 2.2058823529411766) internal successors, (225), 101 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 17:18:50,236 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 252 transitions. [2022-01-31 17:18:50,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2022-01-31 17:18:50,237 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:18:50,237 INFO L514 BasicCegarLoop]: trace histogram [99, 99, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:18:50,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2022-01-31 17:18:50,237 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:18:50,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:18:50,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1909813815, now seen corresponding path program 99 times [2022-01-31 17:18:50,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:18:50,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2002878931] [2022-01-31 17:18:50,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:18:50,241 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:18:50,241 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:18:50,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:18:50,256 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:18:50,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:18:52,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:18:52,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:18:52,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:18:52,561 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:18:52,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2002878931] [2022-01-31 17:18:52,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2002878931] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:18:52,561 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:18:52,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2022-01-31 17:18:52,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558527113] [2022-01-31 17:18:52,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:18:52,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-01-31 17:18:52,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:18:52,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-01-31 17:18:52,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 17:18:52,563 INFO L87 Difference]: Start difference. First operand 246 states and 252 transitions. Second operand has 103 states, 103 states have (on average 2.203883495145631) internal successors, (227), 102 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 17:18:55,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:18:55,993 INFO L93 Difference]: Finished difference Result 290 states and 302 transitions. [2022-01-31 17:18:55,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-01-31 17:18:55,993 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 2.203883495145631) internal successors, (227), 102 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 241 [2022-01-31 17:18:55,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:18:55,994 INFO L225 Difference]: With dead ends: 290 [2022-01-31 17:18:55,994 INFO L226 Difference]: Without dead ends: 249 [2022-01-31 17:18:55,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5049 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=15453, Invalid=25553, Unknown=0, NotChecked=0, Total=41006 [2022-01-31 17:18:55,996 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 233 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:18:55,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 64 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:18:55,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-01-31 17:18:56,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 248. [2022-01-31 17:18:56,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 242 states have (on average 1.0289256198347108) internal successors, (249), 242 states have internal predecessors, (249), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:18:56,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 254 transitions. [2022-01-31 17:18:56,067 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 254 transitions. Word has length 241 [2022-01-31 17:18:56,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:18:56,068 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 254 transitions. [2022-01-31 17:18:56,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 2.203883495145631) internal successors, (227), 102 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 17:18:56,068 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 254 transitions. [2022-01-31 17:18:56,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-01-31 17:18:56,069 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:18:56,069 INFO L514 BasicCegarLoop]: trace histogram [100, 100, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:18:56,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2022-01-31 17:18:56,069 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:18:56,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:18:56,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1266130841, now seen corresponding path program 100 times [2022-01-31 17:18:56,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:18:56,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [882810492] [2022-01-31 17:18:56,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:18:56,071 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:18:56,071 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:18:56,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:18:56,093 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:18:56,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:18:58,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:18:58,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:18:58,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:18:58,743 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:18:58,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [882810492] [2022-01-31 17:18:58,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [882810492] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:18:58,743 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:18:58,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2022-01-31 17:18:58,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056916998] [2022-01-31 17:18:58,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:18:58,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-01-31 17:18:58,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:18:58,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-01-31 17:18:58,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-01-31 17:18:58,746 INFO L87 Difference]: Start difference. First operand 248 states and 254 transitions. Second operand has 104 states, 104 states have (on average 2.201923076923077) internal successors, (229), 103 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 17:19:01,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:19:01,310 INFO L93 Difference]: Finished difference Result 292 states and 304 transitions. [2022-01-31 17:19:01,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-01-31 17:19:01,310 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.201923076923077) internal successors, (229), 103 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 243 [2022-01-31 17:19:01,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:19:01,311 INFO L225 Difference]: With dead ends: 292 [2022-01-31 17:19:01,311 INFO L226 Difference]: Without dead ends: 251 [2022-01-31 17:19:01,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5150 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=15759, Invalid=26061, Unknown=0, NotChecked=0, Total=41820 [2022-01-31 17:19:01,314 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 235 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:19:01,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 59 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:19:01,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-01-31 17:19:01,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 250. [2022-01-31 17:19:01,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 244 states have (on average 1.028688524590164) internal successors, (251), 244 states have internal predecessors, (251), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:19:01,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 256 transitions. [2022-01-31 17:19:01,395 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 256 transitions. Word has length 243 [2022-01-31 17:19:01,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:19:01,395 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 256 transitions. [2022-01-31 17:19:01,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 2.201923076923077) internal successors, (229), 103 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 17:19:01,395 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 256 transitions. [2022-01-31 17:19:01,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2022-01-31 17:19:01,423 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:19:01,423 INFO L514 BasicCegarLoop]: trace histogram [101, 101, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:19:01,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2022-01-31 17:19:01,423 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:19:01,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:19:01,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1162083451, now seen corresponding path program 101 times [2022-01-31 17:19:01,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:19:01,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1619388326] [2022-01-31 17:19:01,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:19:01,425 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:19:01,425 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:19:01,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:19:01,441 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:19:01,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:19:04,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:19:04,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:19:04,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:19:04,110 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:19:04,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1619388326] [2022-01-31 17:19:04,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1619388326] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:19:04,110 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:19:04,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2022-01-31 17:19:04,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889647622] [2022-01-31 17:19:04,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:19:04,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-01-31 17:19:04,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:19:04,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-01-31 17:19:04,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5358, Invalid=5562, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 17:19:04,112 INFO L87 Difference]: Start difference. First operand 250 states and 256 transitions. Second operand has 105 states, 105 states have (on average 2.2) internal successors, (231), 104 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 17:19:06,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:19:06,828 INFO L93 Difference]: Finished difference Result 294 states and 306 transitions. [2022-01-31 17:19:06,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-01-31 17:19:06,828 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.2) internal successors, (231), 104 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 245 [2022-01-31 17:19:06,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:19:06,829 INFO L225 Difference]: With dead ends: 294 [2022-01-31 17:19:06,829 INFO L226 Difference]: Without dead ends: 253 [2022-01-31 17:19:06,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5252 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=16068, Invalid=26574, Unknown=0, NotChecked=0, Total=42642 [2022-01-31 17:19:06,832 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 237 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:19:06,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 59 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:19:06,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-01-31 17:19:06,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 252. [2022-01-31 17:19:06,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 246 states have (on average 1.0284552845528456) internal successors, (253), 246 states have internal predecessors, (253), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:19:06,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 258 transitions. [2022-01-31 17:19:06,897 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 258 transitions. Word has length 245 [2022-01-31 17:19:06,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:19:06,897 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 258 transitions. [2022-01-31 17:19:06,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 2.2) internal successors, (231), 104 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 17:19:06,897 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 258 transitions. [2022-01-31 17:19:06,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2022-01-31 17:19:06,897 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:19:06,897 INFO L514 BasicCegarLoop]: trace histogram [102, 102, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:19:06,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2022-01-31 17:19:06,898 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:19:06,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:19:06,898 INFO L85 PathProgramCache]: Analyzing trace with hash 43210531, now seen corresponding path program 102 times [2022-01-31 17:19:06,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:19:06,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1490352185] [2022-01-31 17:19:06,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:19:06,899 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:19:06,899 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:19:06,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:19:06,916 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:19:06,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:19:09,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:19:09,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:19:09,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:19:09,067 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:19:09,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1490352185] [2022-01-31 17:19:09,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1490352185] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:19:09,067 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:19:09,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2022-01-31 17:19:09,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402367045] [2022-01-31 17:19:09,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:19:09,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-01-31 17:19:09,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:19:09,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-01-31 17:19:09,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2022-01-31 17:19:09,070 INFO L87 Difference]: Start difference. First operand 252 states and 258 transitions. Second operand has 106 states, 106 states have (on average 2.19811320754717) internal successors, (233), 105 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 17:19:12,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:19:12,465 INFO L93 Difference]: Finished difference Result 296 states and 308 transitions. [2022-01-31 17:19:12,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-01-31 17:19:12,465 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.19811320754717) internal successors, (233), 105 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 247 [2022-01-31 17:19:12,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:19:12,466 INFO L225 Difference]: With dead ends: 296 [2022-01-31 17:19:12,466 INFO L226 Difference]: Without dead ends: 255 [2022-01-31 17:19:12,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5355 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=16380, Invalid=27092, Unknown=0, NotChecked=0, Total=43472 [2022-01-31 17:19:12,468 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 239 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:19:12,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 49 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:19:12,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-01-31 17:19:12,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 254. [2022-01-31 17:19:12,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 248 states have (on average 1.028225806451613) internal successors, (255), 248 states have internal predecessors, (255), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:19:12,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 260 transitions. [2022-01-31 17:19:12,538 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 260 transitions. Word has length 247 [2022-01-31 17:19:12,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:19:12,538 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 260 transitions. [2022-01-31 17:19:12,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 2.19811320754717) internal successors, (233), 105 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 17:19:12,538 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 260 transitions. [2022-01-31 17:19:12,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2022-01-31 17:19:12,539 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:19:12,539 INFO L514 BasicCegarLoop]: trace histogram [103, 103, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:19:12,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2022-01-31 17:19:12,539 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:19:12,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:19:12,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1310442687, now seen corresponding path program 103 times [2022-01-31 17:19:12,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:19:12,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [133089855] [2022-01-31 17:19:12,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:19:12,541 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:19:12,541 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:19:12,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:19:12,557 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:19:12,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:19:15,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:19:15,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:19:15,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:19:15,915 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:19:15,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [133089855] [2022-01-31 17:19:15,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [133089855] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:19:15,915 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:19:15,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [107] imperfect sequences [] total 107 [2022-01-31 17:19:15,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656322447] [2022-01-31 17:19:15,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:19:15,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-01-31 17:19:15,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:19:15,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-01-31 17:19:15,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5567, Invalid=5775, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 17:19:15,918 INFO L87 Difference]: Start difference. First operand 254 states and 260 transitions. Second operand has 107 states, 107 states have (on average 2.196261682242991) internal successors, (235), 106 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 17:19:19,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:19:19,041 INFO L93 Difference]: Finished difference Result 298 states and 310 transitions. [2022-01-31 17:19:19,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-01-31 17:19:19,041 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.196261682242991) internal successors, (235), 106 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 249 [2022-01-31 17:19:19,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:19:19,041 INFO L225 Difference]: With dead ends: 298 [2022-01-31 17:19:19,041 INFO L226 Difference]: Without dead ends: 257 [2022-01-31 17:19:19,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5459 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=16695, Invalid=27615, Unknown=0, NotChecked=0, Total=44310 [2022-01-31 17:19:19,046 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 241 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:19:19,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 64 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:19:19,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-01-31 17:19:19,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 256. [2022-01-31 17:19:19,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 250 states have (on average 1.028) internal successors, (257), 250 states have internal predecessors, (257), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:19:19,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 262 transitions. [2022-01-31 17:19:19,116 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 262 transitions. Word has length 249 [2022-01-31 17:19:19,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:19:19,116 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 262 transitions. [2022-01-31 17:19:19,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 2.196261682242991) internal successors, (235), 106 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 17:19:19,116 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 262 transitions. [2022-01-31 17:19:19,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2022-01-31 17:19:19,117 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:19:19,117 INFO L514 BasicCegarLoop]: trace histogram [104, 104, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:19:19,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2022-01-31 17:19:19,117 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:19:19,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:19:19,117 INFO L85 PathProgramCache]: Analyzing trace with hash -796094497, now seen corresponding path program 104 times [2022-01-31 17:19:19,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:19:19,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [348362035] [2022-01-31 17:19:19,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:19:19,118 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:19:19,118 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:19:19,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:19:19,136 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:19:19,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:19:21,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:19:21,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:19:21,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:19:21,379 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:19:21,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [348362035] [2022-01-31 17:19:21,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [348362035] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:19:21,380 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:19:21,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2022-01-31 17:19:21,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931192540] [2022-01-31 17:19:21,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:19:21,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-01-31 17:19:21,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:19:21,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-01-31 17:19:21,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5673, Invalid=5883, Unknown=0, NotChecked=0, Total=11556 [2022-01-31 17:19:21,382 INFO L87 Difference]: Start difference. First operand 256 states and 262 transitions. Second operand has 108 states, 108 states have (on average 2.1944444444444446) internal successors, (237), 107 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 17:19:24,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:19:24,108 INFO L93 Difference]: Finished difference Result 300 states and 312 transitions. [2022-01-31 17:19:24,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-01-31 17:19:24,108 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 2.1944444444444446) internal successors, (237), 107 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 251 [2022-01-31 17:19:24,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:19:24,109 INFO L225 Difference]: With dead ends: 300 [2022-01-31 17:19:24,109 INFO L226 Difference]: Without dead ends: 259 [2022-01-31 17:19:24,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5564 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=17013, Invalid=28143, Unknown=0, NotChecked=0, Total=45156 [2022-01-31 17:19:24,111 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 243 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:19:24,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 69 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:19:24,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-01-31 17:19:24,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 258. [2022-01-31 17:19:24,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 252 states have (on average 1.0277777777777777) internal successors, (259), 252 states have internal predecessors, (259), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:19:24,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 264 transitions. [2022-01-31 17:19:24,180 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 264 transitions. Word has length 251 [2022-01-31 17:19:24,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:19:24,180 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 264 transitions. [2022-01-31 17:19:24,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 2.1944444444444446) internal successors, (237), 107 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 17:19:24,180 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 264 transitions. [2022-01-31 17:19:24,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2022-01-31 17:19:24,180 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:19:24,181 INFO L514 BasicCegarLoop]: trace histogram [105, 105, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:19:24,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2022-01-31 17:19:24,181 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:19:24,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:19:24,181 INFO L85 PathProgramCache]: Analyzing trace with hash -428722947, now seen corresponding path program 105 times [2022-01-31 17:19:24,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:19:24,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [972010477] [2022-01-31 17:19:24,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:19:24,183 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:19:24,183 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:19:24,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:19:24,202 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:19:24,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:19:26,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:19:26,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:19:26,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:19:26,382 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:19:26,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [972010477] [2022-01-31 17:19:26,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [972010477] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:19:26,382 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:19:26,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [109] imperfect sequences [] total 109 [2022-01-31 17:19:26,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339006452] [2022-01-31 17:19:26,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:19:26,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-01-31 17:19:26,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:19:26,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-01-31 17:19:26,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5780, Invalid=5992, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 17:19:26,384 INFO L87 Difference]: Start difference. First operand 258 states and 264 transitions. Second operand has 109 states, 109 states have (on average 2.1926605504587156) internal successors, (239), 108 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 17:19:29,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:19:29,239 INFO L93 Difference]: Finished difference Result 302 states and 314 transitions. [2022-01-31 17:19:29,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-01-31 17:19:29,239 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 2.1926605504587156) internal successors, (239), 108 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 253 [2022-01-31 17:19:29,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:19:29,239 INFO L225 Difference]: With dead ends: 302 [2022-01-31 17:19:29,239 INFO L226 Difference]: Without dead ends: 261 [2022-01-31 17:19:29,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5670 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=17334, Invalid=28676, Unknown=0, NotChecked=0, Total=46010 [2022-01-31 17:19:29,242 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 245 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:19:29,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 59 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:19:29,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-01-31 17:19:29,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 260. [2022-01-31 17:19:29,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 254 states have (on average 1.0275590551181102) internal successors, (261), 254 states have internal predecessors, (261), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:19:29,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 266 transitions. [2022-01-31 17:19:29,312 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 266 transitions. Word has length 253 [2022-01-31 17:19:29,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:19:29,312 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 266 transitions. [2022-01-31 17:19:29,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 2.1926605504587156) internal successors, (239), 108 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 17:19:29,312 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 266 transitions. [2022-01-31 17:19:29,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2022-01-31 17:19:29,313 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:19:29,313 INFO L514 BasicCegarLoop]: trace histogram [106, 106, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:19:29,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2022-01-31 17:19:29,313 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:19:29,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:19:29,313 INFO L85 PathProgramCache]: Analyzing trace with hash 428018331, now seen corresponding path program 106 times [2022-01-31 17:19:29,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:19:29,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1764184663] [2022-01-31 17:19:29,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:19:29,320 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:19:29,320 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:19:29,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:19:29,339 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:19:29,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:19:31,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:19:31,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:19:31,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:19:31,747 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:19:31,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1764184663] [2022-01-31 17:19:31,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1764184663] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:19:31,747 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:19:31,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [110] imperfect sequences [] total 110 [2022-01-31 17:19:31,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456657624] [2022-01-31 17:19:31,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:19:31,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-01-31 17:19:31,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:19:31,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-01-31 17:19:31,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5888, Invalid=6102, Unknown=0, NotChecked=0, Total=11990 [2022-01-31 17:19:31,749 INFO L87 Difference]: Start difference. First operand 260 states and 266 transitions. Second operand has 110 states, 110 states have (on average 2.190909090909091) internal successors, (241), 109 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 17:19:34,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:19:34,729 INFO L93 Difference]: Finished difference Result 304 states and 316 transitions. [2022-01-31 17:19:34,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-01-31 17:19:34,729 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.190909090909091) internal successors, (241), 109 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 255 [2022-01-31 17:19:34,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:19:34,730 INFO L225 Difference]: With dead ends: 304 [2022-01-31 17:19:34,730 INFO L226 Difference]: Without dead ends: 263 [2022-01-31 17:19:34,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5777 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=17658, Invalid=29214, Unknown=0, NotChecked=0, Total=46872 [2022-01-31 17:19:34,732 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 247 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:19:34,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 69 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:19:34,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-01-31 17:19:34,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 262. [2022-01-31 17:19:34,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 256 states have (on average 1.02734375) internal successors, (263), 256 states have internal predecessors, (263), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:19:34,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 268 transitions. [2022-01-31 17:19:34,805 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 268 transitions. Word has length 255 [2022-01-31 17:19:34,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:19:34,805 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 268 transitions. [2022-01-31 17:19:34,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 2.190909090909091) internal successors, (241), 109 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 17:19:34,805 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 268 transitions. [2022-01-31 17:19:34,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2022-01-31 17:19:34,806 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:19:34,806 INFO L514 BasicCegarLoop]: trace histogram [107, 107, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:19:34,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2022-01-31 17:19:34,806 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:19:34,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:19:34,806 INFO L85 PathProgramCache]: Analyzing trace with hash -877334343, now seen corresponding path program 107 times [2022-01-31 17:19:34,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:19:34,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [769396513] [2022-01-31 17:19:34,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:19:34,815 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:19:34,815 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:19:34,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:19:34,835 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:19:34,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:19:37,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:19:37,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:19:37,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:19:37,373 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:19:37,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [769396513] [2022-01-31 17:19:37,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [769396513] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:19:37,374 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:19:37,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [111] imperfect sequences [] total 111 [2022-01-31 17:19:37,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462927932] [2022-01-31 17:19:37,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:19:37,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-01-31 17:19:37,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:19:37,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-01-31 17:19:37,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5997, Invalid=6213, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 17:19:37,376 INFO L87 Difference]: Start difference. First operand 262 states and 268 transitions. Second operand has 111 states, 111 states have (on average 2.189189189189189) internal successors, (243), 110 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 17:19:41,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:19:41,164 INFO L93 Difference]: Finished difference Result 306 states and 318 transitions. [2022-01-31 17:19:41,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-01-31 17:19:41,164 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 2.189189189189189) internal successors, (243), 110 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 257 [2022-01-31 17:19:41,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:19:41,165 INFO L225 Difference]: With dead ends: 306 [2022-01-31 17:19:41,165 INFO L226 Difference]: Without dead ends: 265 [2022-01-31 17:19:41,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5885 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=17985, Invalid=29757, Unknown=0, NotChecked=0, Total=47742 [2022-01-31 17:19:41,167 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 249 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:19:41,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 69 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:19:41,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-01-31 17:19:41,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 264. [2022-01-31 17:19:41,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 258 states have (on average 1.0271317829457365) internal successors, (265), 258 states have internal predecessors, (265), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:19:41,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 270 transitions. [2022-01-31 17:19:41,239 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 270 transitions. Word has length 257 [2022-01-31 17:19:41,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:19:41,240 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 270 transitions. [2022-01-31 17:19:41,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 2.189189189189189) internal successors, (243), 110 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 17:19:41,240 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 270 transitions. [2022-01-31 17:19:41,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2022-01-31 17:19:41,240 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:19:41,240 INFO L514 BasicCegarLoop]: trace histogram [108, 108, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:19:41,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2022-01-31 17:19:41,240 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:19:41,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:19:41,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1190803625, now seen corresponding path program 108 times [2022-01-31 17:19:41,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:19:41,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2112458772] [2022-01-31 17:19:41,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:19:41,242 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:19:41,242 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:19:41,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:19:41,261 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:19:41,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:19:44,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:19:44,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:19:44,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:19:44,553 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:19:44,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2112458772] [2022-01-31 17:19:44,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2112458772] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:19:44,553 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:19:44,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [112] imperfect sequences [] total 112 [2022-01-31 17:19:44,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790070074] [2022-01-31 17:19:44,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:19:44,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-01-31 17:19:44,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:19:44,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-01-31 17:19:44,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6107, Invalid=6325, Unknown=0, NotChecked=0, Total=12432 [2022-01-31 17:19:44,556 INFO L87 Difference]: Start difference. First operand 264 states and 270 transitions. Second operand has 112 states, 112 states have (on average 2.1875) internal successors, (245), 111 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 17:19:47,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:19:47,592 INFO L93 Difference]: Finished difference Result 308 states and 320 transitions. [2022-01-31 17:19:47,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-01-31 17:19:47,593 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 2.1875) internal successors, (245), 111 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 259 [2022-01-31 17:19:47,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:19:47,593 INFO L225 Difference]: With dead ends: 308 [2022-01-31 17:19:47,593 INFO L226 Difference]: Without dead ends: 267 [2022-01-31 17:19:47,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5994 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=18315, Invalid=30305, Unknown=0, NotChecked=0, Total=48620 [2022-01-31 17:19:47,596 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 251 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:19:47,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 84 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:19:47,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-01-31 17:19:47,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 266. [2022-01-31 17:19:47,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 260 states have (on average 1.0269230769230768) internal successors, (267), 260 states have internal predecessors, (267), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:19:47,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 272 transitions. [2022-01-31 17:19:47,672 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 272 transitions. Word has length 259 [2022-01-31 17:19:47,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:19:47,672 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 272 transitions. [2022-01-31 17:19:47,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 2.1875) internal successors, (245), 111 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 17:19:47,672 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 272 transitions. [2022-01-31 17:19:47,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2022-01-31 17:19:47,673 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:19:47,673 INFO L514 BasicCegarLoop]: trace histogram [109, 109, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:19:47,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2022-01-31 17:19:47,673 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:19:47,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:19:47,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1787072907, now seen corresponding path program 109 times [2022-01-31 17:19:47,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:19:47,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1975455894] [2022-01-31 17:19:47,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:19:47,674 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:19:47,674 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:19:47,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:19:47,695 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:19:47,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:19:50,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:19:50,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:19:50,763 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 17:19:50,763 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:19:50,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1975455894] [2022-01-31 17:19:50,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1975455894] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:19:50,763 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:19:50,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [113] imperfect sequences [] total 113 [2022-01-31 17:19:50,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492958167] [2022-01-31 17:19:50,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:19:50,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-01-31 17:19:50,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:19:50,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-01-31 17:19:50,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6218, Invalid=6438, Unknown=0, NotChecked=0, Total=12656 [2022-01-31 17:19:50,766 INFO L87 Difference]: Start difference. First operand 266 states and 272 transitions. Second operand has 113 states, 113 states have (on average 2.185840707964602) internal successors, (247), 112 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 17:19:54,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:19:54,715 INFO L93 Difference]: Finished difference Result 310 states and 322 transitions. [2022-01-31 17:19:54,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-01-31 17:19:54,715 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 2.185840707964602) internal successors, (247), 112 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 261 [2022-01-31 17:19:54,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:19:54,716 INFO L225 Difference]: With dead ends: 310 [2022-01-31 17:19:54,716 INFO L226 Difference]: Without dead ends: 269 [2022-01-31 17:19:54,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6104 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=18648, Invalid=30858, Unknown=0, NotChecked=0, Total=49506 [2022-01-31 17:19:54,719 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 253 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:19:54,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 64 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:19:54,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-01-31 17:19:54,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 268. [2022-01-31 17:19:54,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 262 states have (on average 1.0267175572519085) internal successors, (269), 262 states have internal predecessors, (269), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:19:54,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 274 transitions. [2022-01-31 17:19:54,793 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 274 transitions. Word has length 261 [2022-01-31 17:19:54,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:19:54,794 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 274 transitions. [2022-01-31 17:19:54,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 2.185840707964602) internal successors, (247), 112 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 17:19:54,794 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 274 transitions. [2022-01-31 17:19:54,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2022-01-31 17:19:54,794 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:19:54,794 INFO L514 BasicCegarLoop]: trace histogram [110, 110, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:19:54,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2022-01-31 17:19:54,795 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:19:54,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:19:54,795 INFO L85 PathProgramCache]: Analyzing trace with hash 723764755, now seen corresponding path program 110 times [2022-01-31 17:19:54,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:19:54,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1869080237] [2022-01-31 17:19:54,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:19:54,796 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:19:54,796 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:19:54,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:19:54,816 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:19:54,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:19:57,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:19:57,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:19:57,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:19:57,223 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:19:57,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1869080237] [2022-01-31 17:19:57,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1869080237] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:19:57,223 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:19:57,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [114] imperfect sequences [] total 114 [2022-01-31 17:19:57,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007685067] [2022-01-31 17:19:57,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:19:57,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2022-01-31 17:19:57,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:19:57,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2022-01-31 17:19:57,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6330, Invalid=6552, Unknown=0, NotChecked=0, Total=12882 [2022-01-31 17:19:57,232 INFO L87 Difference]: Start difference. First operand 268 states and 274 transitions. Second operand has 114 states, 114 states have (on average 2.1842105263157894) internal successors, (249), 113 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 17:20:00,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:20:00,638 INFO L93 Difference]: Finished difference Result 312 states and 324 transitions. [2022-01-31 17:20:00,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-01-31 17:20:00,638 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 2.1842105263157894) internal successors, (249), 113 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 263 [2022-01-31 17:20:00,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:20:00,639 INFO L225 Difference]: With dead ends: 312 [2022-01-31 17:20:00,639 INFO L226 Difference]: Without dead ends: 271 [2022-01-31 17:20:00,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6215 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=18984, Invalid=31416, Unknown=0, NotChecked=0, Total=50400 [2022-01-31 17:20:00,642 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 255 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:20:00,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 94 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:20:00,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2022-01-31 17:20:00,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 270. [2022-01-31 17:20:00,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 264 states have (on average 1.0265151515151516) internal successors, (271), 264 states have internal predecessors, (271), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:20:00,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 276 transitions. [2022-01-31 17:20:00,718 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 276 transitions. Word has length 263 [2022-01-31 17:20:00,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:20:00,719 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 276 transitions. [2022-01-31 17:20:00,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 2.1842105263157894) internal successors, (249), 113 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 17:20:00,719 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 276 transitions. [2022-01-31 17:20:00,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2022-01-31 17:20:00,719 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:20:00,719 INFO L514 BasicCegarLoop]: trace histogram [111, 111, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:20:00,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2022-01-31 17:20:00,720 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:20:00,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:20:00,720 INFO L85 PathProgramCache]: Analyzing trace with hash -132862415, now seen corresponding path program 111 times [2022-01-31 17:20:00,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:20:00,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1279973087] [2022-01-31 17:20:00,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:20:00,721 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:20:00,721 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:20:00,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:20:00,763 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:20:00,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:20:03,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:20:03,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:20:03,289 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 17:20:03,289 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:20:03,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1279973087] [2022-01-31 17:20:03,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1279973087] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:20:03,290 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:20:03,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [115] imperfect sequences [] total 115 [2022-01-31 17:20:03,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474796214] [2022-01-31 17:20:03,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:20:03,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-01-31 17:20:03,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:20:03,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-01-31 17:20:03,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6443, Invalid=6667, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 17:20:03,293 INFO L87 Difference]: Start difference. First operand 270 states and 276 transitions. Second operand has 115 states, 115 states have (on average 2.1826086956521737) internal successors, (251), 114 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 17:20:06,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:20:06,654 INFO L93 Difference]: Finished difference Result 314 states and 326 transitions. [2022-01-31 17:20:06,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-01-31 17:20:06,655 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 2.1826086956521737) internal successors, (251), 114 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 265 [2022-01-31 17:20:06,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:20:06,655 INFO L225 Difference]: With dead ends: 314 [2022-01-31 17:20:06,655 INFO L226 Difference]: Without dead ends: 273 [2022-01-31 17:20:06,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6327 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=19323, Invalid=31979, Unknown=0, NotChecked=0, Total=51302 [2022-01-31 17:20:06,659 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 257 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:20:06,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 59 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:20:06,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2022-01-31 17:20:06,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 272. [2022-01-31 17:20:06,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 266 states have (on average 1.0263157894736843) internal successors, (273), 266 states have internal predecessors, (273), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:20:06,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 278 transitions. [2022-01-31 17:20:06,766 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 278 transitions. Word has length 265 [2022-01-31 17:20:06,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:20:06,766 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 278 transitions. [2022-01-31 17:20:06,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 2.1826086956521737) internal successors, (251), 114 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 17:20:06,766 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 278 transitions. [2022-01-31 17:20:06,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2022-01-31 17:20:06,767 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:20:06,767 INFO L514 BasicCegarLoop]: trace histogram [112, 112, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:20:06,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2022-01-31 17:20:06,767 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:20:06,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:20:06,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1282148047, now seen corresponding path program 112 times [2022-01-31 17:20:06,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:20:06,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [949612006] [2022-01-31 17:20:06,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:20:06,769 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:20:06,769 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:20:06,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:20:06,789 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:20:06,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:20:09,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:20:09,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:20:09,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:20:09,929 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:20:09,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [949612006] [2022-01-31 17:20:09,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [949612006] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:20:09,930 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:20:09,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [116] imperfect sequences [] total 116 [2022-01-31 17:20:09,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180276142] [2022-01-31 17:20:09,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:20:09,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-01-31 17:20:09,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:20:09,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-01-31 17:20:09,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6557, Invalid=6783, Unknown=0, NotChecked=0, Total=13340 [2022-01-31 17:20:09,933 INFO L87 Difference]: Start difference. First operand 272 states and 278 transitions. Second operand has 116 states, 116 states have (on average 2.1810344827586206) internal successors, (253), 115 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 17:20:13,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:20:13,339 INFO L93 Difference]: Finished difference Result 316 states and 328 transitions. [2022-01-31 17:20:13,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-01-31 17:20:13,339 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 2.1810344827586206) internal successors, (253), 115 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 267 [2022-01-31 17:20:13,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:20:13,340 INFO L225 Difference]: With dead ends: 316 [2022-01-31 17:20:13,340 INFO L226 Difference]: Without dead ends: 275 [2022-01-31 17:20:13,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6440 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=19665, Invalid=32547, Unknown=0, NotChecked=0, Total=52212 [2022-01-31 17:20:13,342 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 259 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:20:13,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 64 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:20:13,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-01-31 17:20:13,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 274. [2022-01-31 17:20:13,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 268 states have (on average 1.0261194029850746) internal successors, (275), 268 states have internal predecessors, (275), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:20:13,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 280 transitions. [2022-01-31 17:20:13,421 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 280 transitions. Word has length 267 [2022-01-31 17:20:13,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:20:13,422 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 280 transitions. [2022-01-31 17:20:13,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 2.1810344827586206) internal successors, (253), 115 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 17:20:13,423 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 280 transitions. [2022-01-31 17:20:13,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2022-01-31 17:20:13,423 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:20:13,423 INFO L514 BasicCegarLoop]: trace histogram [113, 113, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:20:13,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2022-01-31 17:20:13,423 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:20:13,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:20:13,426 INFO L85 PathProgramCache]: Analyzing trace with hash -397430803, now seen corresponding path program 113 times [2022-01-31 17:20:13,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:20:13,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [986847409] [2022-01-31 17:20:13,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:20:13,427 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:20:13,427 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:20:13,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:20:13,448 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:20:13,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:20:16,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:20:16,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:20:16,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:20:16,755 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:20:16,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [986847409] [2022-01-31 17:20:16,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [986847409] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:20:16,755 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:20:16,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [117] imperfect sequences [] total 117 [2022-01-31 17:20:16,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060566806] [2022-01-31 17:20:16,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:20:16,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-01-31 17:20:16,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:20:16,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-01-31 17:20:16,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6672, Invalid=6900, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 17:20:16,758 INFO L87 Difference]: Start difference. First operand 274 states and 280 transitions. Second operand has 117 states, 117 states have (on average 2.1794871794871793) internal successors, (255), 116 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 17:20:19,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:20:19,916 INFO L93 Difference]: Finished difference Result 318 states and 330 transitions. [2022-01-31 17:20:19,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-01-31 17:20:19,916 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 2.1794871794871793) internal successors, (255), 116 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 269 [2022-01-31 17:20:19,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:20:19,917 INFO L225 Difference]: With dead ends: 318 [2022-01-31 17:20:19,917 INFO L226 Difference]: Without dead ends: 277 [2022-01-31 17:20:19,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6554 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=20010, Invalid=33120, Unknown=0, NotChecked=0, Total=53130 [2022-01-31 17:20:19,919 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 261 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:20:19,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 69 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:20:19,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-01-31 17:20:19,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 276. [2022-01-31 17:20:19,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 270 states have (on average 1.025925925925926) internal successors, (277), 270 states have internal predecessors, (277), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:20:19,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 282 transitions. [2022-01-31 17:20:19,999 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 282 transitions. Word has length 269 [2022-01-31 17:20:19,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:20:19,999 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 282 transitions. [2022-01-31 17:20:19,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 2.1794871794871793) internal successors, (255), 116 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 17:20:19,999 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 282 transitions. [2022-01-31 17:20:20,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2022-01-31 17:20:20,000 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:20:20,000 INFO L514 BasicCegarLoop]: trace histogram [114, 114, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:20:20,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2022-01-31 17:20:20,000 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:20:20,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:20:20,000 INFO L85 PathProgramCache]: Analyzing trace with hash 434997643, now seen corresponding path program 114 times [2022-01-31 17:20:20,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:20:20,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [701989692] [2022-01-31 17:20:20,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:20:20,001 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:20:20,001 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:20:20,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:20:20,023 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:20:20,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:20:22,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:20:22,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:20:22,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:20:22,675 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:20:22,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [701989692] [2022-01-31 17:20:22,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [701989692] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:20:22,676 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:20:22,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [118] imperfect sequences [] total 118 [2022-01-31 17:20:22,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700726671] [2022-01-31 17:20:22,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:20:22,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2022-01-31 17:20:22,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:20:22,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2022-01-31 17:20:22,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6788, Invalid=7018, Unknown=0, NotChecked=0, Total=13806 [2022-01-31 17:20:22,679 INFO L87 Difference]: Start difference. First operand 276 states and 282 transitions. Second operand has 118 states, 118 states have (on average 2.1779661016949152) internal successors, (257), 117 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 17:20:26,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:20:26,031 INFO L93 Difference]: Finished difference Result 320 states and 332 transitions. [2022-01-31 17:20:26,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-01-31 17:20:26,031 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 2.1779661016949152) internal successors, (257), 117 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 271 [2022-01-31 17:20:26,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:20:26,032 INFO L225 Difference]: With dead ends: 320 [2022-01-31 17:20:26,032 INFO L226 Difference]: Without dead ends: 279 [2022-01-31 17:20:26,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6669 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=20358, Invalid=33698, Unknown=0, NotChecked=0, Total=54056 [2022-01-31 17:20:26,035 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 263 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:20:26,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 79 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:20:26,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-01-31 17:20:26,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 278. [2022-01-31 17:20:26,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 272 states have (on average 1.025735294117647) internal successors, (279), 272 states have internal predecessors, (279), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:20:26,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 284 transitions. [2022-01-31 17:20:26,117 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 284 transitions. Word has length 271 [2022-01-31 17:20:26,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:20:26,117 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 284 transitions. [2022-01-31 17:20:26,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 2.1779661016949152) internal successors, (257), 117 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 17:20:26,117 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 284 transitions. [2022-01-31 17:20:26,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2022-01-31 17:20:26,118 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:20:26,118 INFO L514 BasicCegarLoop]: trace histogram [115, 115, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:20:26,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2022-01-31 17:20:26,118 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:20:26,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:20:26,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1534817193, now seen corresponding path program 115 times [2022-01-31 17:20:26,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:20:26,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [130562280] [2022-01-31 17:20:26,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:20:26,119 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:20:26,119 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:20:26,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:20:26,174 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:20:26,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:20:29,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:20:29,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:20:29,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:20:29,306 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:20:29,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [130562280] [2022-01-31 17:20:29,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [130562280] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:20:29,306 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:20:29,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [119] imperfect sequences [] total 119 [2022-01-31 17:20:29,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563874091] [2022-01-31 17:20:29,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:20:29,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-01-31 17:20:29,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:20:29,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-01-31 17:20:29,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6905, Invalid=7137, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 17:20:29,310 INFO L87 Difference]: Start difference. First operand 278 states and 284 transitions. Second operand has 119 states, 119 states have (on average 2.176470588235294) internal successors, (259), 118 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 17:20:33,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:20:33,075 INFO L93 Difference]: Finished difference Result 322 states and 334 transitions. [2022-01-31 17:20:33,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-01-31 17:20:33,075 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 2.176470588235294) internal successors, (259), 118 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 273 [2022-01-31 17:20:33,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:20:33,075 INFO L225 Difference]: With dead ends: 322 [2022-01-31 17:20:33,076 INFO L226 Difference]: Without dead ends: 281 [2022-01-31 17:20:33,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6785 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=20709, Invalid=34281, Unknown=0, NotChecked=0, Total=54990 [2022-01-31 17:20:33,077 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 265 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:20:33,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 79 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:20:33,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-01-31 17:20:33,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 280. [2022-01-31 17:20:33,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 274 states have (on average 1.0255474452554745) internal successors, (281), 274 states have internal predecessors, (281), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:20:33,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 286 transitions. [2022-01-31 17:20:33,159 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 286 transitions. Word has length 273 [2022-01-31 17:20:33,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:20:33,159 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 286 transitions. [2022-01-31 17:20:33,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 2.176470588235294) internal successors, (259), 118 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 17:20:33,159 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 286 transitions. [2022-01-31 17:20:33,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2022-01-31 17:20:33,160 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:20:33,160 INFO L514 BasicCegarLoop]: trace histogram [116, 116, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:20:33,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2022-01-31 17:20:33,160 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:20:33,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:20:33,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1899449927, now seen corresponding path program 116 times [2022-01-31 17:20:33,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:20:33,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1224631409] [2022-01-31 17:20:33,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:20:33,161 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:20:33,161 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:20:33,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:20:33,183 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:20:33,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:20:36,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:20:36,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:20:36,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:20:36,629 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:20:36,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1224631409] [2022-01-31 17:20:36,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1224631409] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:20:36,629 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:20:36,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [120] imperfect sequences [] total 120 [2022-01-31 17:20:36,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180191339] [2022-01-31 17:20:36,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:20:36,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2022-01-31 17:20:36,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:20:36,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2022-01-31 17:20:36,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7023, Invalid=7257, Unknown=0, NotChecked=0, Total=14280 [2022-01-31 17:20:36,631 INFO L87 Difference]: Start difference. First operand 280 states and 286 transitions. Second operand has 120 states, 120 states have (on average 2.175) internal successors, (261), 119 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 17:20:40,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:20:40,250 INFO L93 Difference]: Finished difference Result 324 states and 336 transitions. [2022-01-31 17:20:40,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-01-31 17:20:40,250 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 2.175) internal successors, (261), 119 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 275 [2022-01-31 17:20:40,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:20:40,251 INFO L225 Difference]: With dead ends: 324 [2022-01-31 17:20:40,251 INFO L226 Difference]: Without dead ends: 283 [2022-01-31 17:20:40,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6902 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=21063, Invalid=34869, Unknown=0, NotChecked=0, Total=55932 [2022-01-31 17:20:40,254 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 267 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:20:40,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 69 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:20:40,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-01-31 17:20:40,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 282. [2022-01-31 17:20:40,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 276 states have (on average 1.0253623188405796) internal successors, (283), 276 states have internal predecessors, (283), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:20:40,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 288 transitions. [2022-01-31 17:20:40,339 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 288 transitions. Word has length 275 [2022-01-31 17:20:40,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:20:40,339 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 288 transitions. [2022-01-31 17:20:40,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 120 states have (on average 2.175) internal successors, (261), 119 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 17:20:40,339 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 288 transitions. [2022-01-31 17:20:40,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2022-01-31 17:20:40,340 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:20:40,340 INFO L514 BasicCegarLoop]: trace histogram [117, 117, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:20:40,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2022-01-31 17:20:40,340 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:20:40,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:20:40,340 INFO L85 PathProgramCache]: Analyzing trace with hash 124189029, now seen corresponding path program 117 times [2022-01-31 17:20:40,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:20:40,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [437289205] [2022-01-31 17:20:40,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:20:40,341 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:20:40,341 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:20:40,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:20:40,363 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:20:40,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:20:43,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:20:43,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:20:43,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:20:43,391 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:20:43,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [437289205] [2022-01-31 17:20:43,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [437289205] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:20:43,391 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:20:43,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [121] imperfect sequences [] total 121 [2022-01-31 17:20:43,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835525637] [2022-01-31 17:20:43,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:20:43,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2022-01-31 17:20:43,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:20:43,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2022-01-31 17:20:43,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7142, Invalid=7378, Unknown=0, NotChecked=0, Total=14520 [2022-01-31 17:20:43,394 INFO L87 Difference]: Start difference. First operand 282 states and 288 transitions. Second operand has 121 states, 121 states have (on average 2.1735537190082646) internal successors, (263), 120 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 17:20:47,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:20:47,780 INFO L93 Difference]: Finished difference Result 326 states and 338 transitions. [2022-01-31 17:20:47,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-01-31 17:20:47,780 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 2.1735537190082646) internal successors, (263), 120 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 277 [2022-01-31 17:20:47,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:20:47,781 INFO L225 Difference]: With dead ends: 326 [2022-01-31 17:20:47,781 INFO L226 Difference]: Without dead ends: 285 [2022-01-31 17:20:47,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7020 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=21420, Invalid=35462, Unknown=0, NotChecked=0, Total=56882 [2022-01-31 17:20:47,785 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 269 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:20:47,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 79 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:20:47,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-01-31 17:20:47,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 284. [2022-01-31 17:20:47,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 278 states have (on average 1.025179856115108) internal successors, (285), 278 states have internal predecessors, (285), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:20:47,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 290 transitions. [2022-01-31 17:20:47,886 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 290 transitions. Word has length 277 [2022-01-31 17:20:47,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:20:47,886 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 290 transitions. [2022-01-31 17:20:47,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 2.1735537190082646) internal successors, (263), 120 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 17:20:47,886 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 290 transitions. [2022-01-31 17:20:47,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2022-01-31 17:20:47,887 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:20:47,887 INFO L514 BasicCegarLoop]: trace histogram [118, 118, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:20:47,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2022-01-31 17:20:47,887 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:20:47,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:20:47,887 INFO L85 PathProgramCache]: Analyzing trace with hash -799517437, now seen corresponding path program 118 times [2022-01-31 17:20:47,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:20:47,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [776788155] [2022-01-31 17:20:47,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:20:47,888 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:20:47,888 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:20:47,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:20:47,911 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:20:47,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:20:50,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:20:50,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:20:50,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:20:50,708 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:20:50,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [776788155] [2022-01-31 17:20:50,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [776788155] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:20:50,709 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:20:50,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [122] imperfect sequences [] total 122 [2022-01-31 17:20:50,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267791266] [2022-01-31 17:20:50,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:20:50,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2022-01-31 17:20:50,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:20:50,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2022-01-31 17:20:50,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7262, Invalid=7500, Unknown=0, NotChecked=0, Total=14762 [2022-01-31 17:20:50,712 INFO L87 Difference]: Start difference. First operand 284 states and 290 transitions. Second operand has 122 states, 122 states have (on average 2.1721311475409837) internal successors, (265), 121 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 17:20:54,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:20:54,883 INFO L93 Difference]: Finished difference Result 328 states and 340 transitions. [2022-01-31 17:20:54,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-01-31 17:20:54,883 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 2.1721311475409837) internal successors, (265), 121 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 279 [2022-01-31 17:20:54,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:20:54,883 INFO L225 Difference]: With dead ends: 328 [2022-01-31 17:20:54,883 INFO L226 Difference]: Without dead ends: 287 [2022-01-31 17:20:54,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7139 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=21780, Invalid=36060, Unknown=0, NotChecked=0, Total=57840 [2022-01-31 17:20:54,886 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 271 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:20:54,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 49 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:20:54,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-01-31 17:20:54,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 286. [2022-01-31 17:20:54,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 280 states have (on average 1.025) internal successors, (287), 280 states have internal predecessors, (287), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:20:54,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 292 transitions. [2022-01-31 17:20:54,972 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 292 transitions. Word has length 279 [2022-01-31 17:20:54,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:20:54,972 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 292 transitions. [2022-01-31 17:20:54,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 2.1721311475409837) internal successors, (265), 121 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 17:20:54,972 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 292 transitions. [2022-01-31 17:20:54,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2022-01-31 17:20:54,973 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:20:54,973 INFO L514 BasicCegarLoop]: trace histogram [119, 119, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:20:54,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2022-01-31 17:20:54,973 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:20:54,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:20:54,973 INFO L85 PathProgramCache]: Analyzing trace with hash 576799009, now seen corresponding path program 119 times [2022-01-31 17:20:54,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:20:54,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1526625410] [2022-01-31 17:20:54,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:20:54,974 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:20:54,975 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:20:54,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:20:54,997 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:20:55,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:20:58,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:20:58,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:20:58,128 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 17:20:58,129 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:20:58,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1526625410] [2022-01-31 17:20:58,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1526625410] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:20:58,129 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:20:58,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [123] imperfect sequences [] total 123 [2022-01-31 17:20:58,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336625517] [2022-01-31 17:20:58,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:20:58,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-01-31 17:20:58,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:20:58,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-01-31 17:20:58,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7383, Invalid=7623, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 17:20:58,132 INFO L87 Difference]: Start difference. First operand 286 states and 292 transitions. Second operand has 123 states, 123 states have (on average 2.1707317073170733) internal successors, (267), 122 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 17:21:02,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:21:02,001 INFO L93 Difference]: Finished difference Result 330 states and 342 transitions. [2022-01-31 17:21:02,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-01-31 17:21:02,002 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 2.1707317073170733) internal successors, (267), 122 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 281 [2022-01-31 17:21:02,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:21:02,002 INFO L225 Difference]: With dead ends: 330 [2022-01-31 17:21:02,002 INFO L226 Difference]: Without dead ends: 289 [2022-01-31 17:21:02,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7259 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=22143, Invalid=36663, Unknown=0, NotChecked=0, Total=58806 [2022-01-31 17:21:02,006 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 273 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:21:02,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 89 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:21:02,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-01-31 17:21:02,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 288. [2022-01-31 17:21:02,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 282 states have (on average 1.024822695035461) internal successors, (289), 282 states have internal predecessors, (289), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:21:02,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 294 transitions. [2022-01-31 17:21:02,110 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 294 transitions. Word has length 281 [2022-01-31 17:21:02,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:21:02,111 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 294 transitions. [2022-01-31 17:21:02,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 2.1707317073170733) internal successors, (267), 122 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 17:21:02,111 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 294 transitions. [2022-01-31 17:21:02,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2022-01-31 17:21:02,111 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:21:02,112 INFO L514 BasicCegarLoop]: trace histogram [120, 120, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:21:02,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2022-01-31 17:21:02,112 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:21:02,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:21:02,112 INFO L85 PathProgramCache]: Analyzing trace with hash 366976447, now seen corresponding path program 120 times [2022-01-31 17:21:02,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:21:02,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2007240198] [2022-01-31 17:21:02,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:21:02,113 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:21:02,113 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:21:02,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:21:02,136 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:21:02,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:21:05,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:21:05,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:21:05,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:21:05,014 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:21:05,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2007240198] [2022-01-31 17:21:05,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2007240198] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:21:05,014 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:21:05,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [124] imperfect sequences [] total 124 [2022-01-31 17:21:05,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594949434] [2022-01-31 17:21:05,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:21:05,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2022-01-31 17:21:05,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:21:05,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2022-01-31 17:21:05,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7505, Invalid=7747, Unknown=0, NotChecked=0, Total=15252 [2022-01-31 17:21:05,018 INFO L87 Difference]: Start difference. First operand 288 states and 294 transitions. Second operand has 124 states, 124 states have (on average 2.1693548387096775) internal successors, (269), 123 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 17:21:08,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:21:08,607 INFO L93 Difference]: Finished difference Result 332 states and 344 transitions. [2022-01-31 17:21:08,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-01-31 17:21:08,607 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 2.1693548387096775) internal successors, (269), 123 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 283 [2022-01-31 17:21:08,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:21:08,608 INFO L225 Difference]: With dead ends: 332 [2022-01-31 17:21:08,608 INFO L226 Difference]: Without dead ends: 291 [2022-01-31 17:21:08,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7380 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=22509, Invalid=37271, Unknown=0, NotChecked=0, Total=59780 [2022-01-31 17:21:08,610 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 275 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:21:08,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [276 Valid, 49 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:21:08,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-01-31 17:21:08,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 290. [2022-01-31 17:21:08,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 284 states have (on average 1.0246478873239437) internal successors, (291), 284 states have internal predecessors, (291), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:21:08,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 296 transitions. [2022-01-31 17:21:08,699 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 296 transitions. Word has length 283 [2022-01-31 17:21:08,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:21:08,699 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 296 transitions. [2022-01-31 17:21:08,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 2.1693548387096775) internal successors, (269), 123 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 17:21:08,699 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 296 transitions. [2022-01-31 17:21:08,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2022-01-31 17:21:08,700 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:21:08,700 INFO L514 BasicCegarLoop]: trace histogram [121, 121, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:21:08,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2022-01-31 17:21:08,700 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:21:08,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:21:08,700 INFO L85 PathProgramCache]: Analyzing trace with hash 590957277, now seen corresponding path program 121 times [2022-01-31 17:21:08,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:21:08,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [165163351] [2022-01-31 17:21:08,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:21:08,701 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:21:08,702 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:21:08,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:21:08,728 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:21:08,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:21:11,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:21:11,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:21:11,709 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 17:21:11,709 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:21:11,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [165163351] [2022-01-31 17:21:11,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [165163351] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:21:11,709 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:21:11,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [125] imperfect sequences [] total 125 [2022-01-31 17:21:11,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089098730] [2022-01-31 17:21:11,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:21:11,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2022-01-31 17:21:11,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:21:11,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2022-01-31 17:21:11,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7628, Invalid=7872, Unknown=0, NotChecked=0, Total=15500 [2022-01-31 17:21:11,712 INFO L87 Difference]: Start difference. First operand 290 states and 296 transitions. Second operand has 125 states, 125 states have (on average 2.168) internal successors, (271), 124 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 17:21:15,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:21:15,680 INFO L93 Difference]: Finished difference Result 334 states and 346 transitions. [2022-01-31 17:21:15,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-01-31 17:21:15,680 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 2.168) internal successors, (271), 124 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 285 [2022-01-31 17:21:15,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:21:15,681 INFO L225 Difference]: With dead ends: 334 [2022-01-31 17:21:15,681 INFO L226 Difference]: Without dead ends: 293 [2022-01-31 17:21:15,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7502 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=22878, Invalid=37884, Unknown=0, NotChecked=0, Total=60762 [2022-01-31 17:21:15,685 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 277 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:21:15,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 59 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:21:15,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-01-31 17:21:15,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 292. [2022-01-31 17:21:15,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 286 states have (on average 1.0244755244755244) internal successors, (293), 286 states have internal predecessors, (293), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:21:15,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 298 transitions. [2022-01-31 17:21:15,793 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 298 transitions. Word has length 285 [2022-01-31 17:21:15,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:21:15,793 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 298 transitions. [2022-01-31 17:21:15,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 2.168) internal successors, (271), 124 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 17:21:15,793 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 298 transitions. [2022-01-31 17:21:15,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2022-01-31 17:21:15,794 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:21:15,794 INFO L514 BasicCegarLoop]: trace histogram [122, 122, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:21:15,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2022-01-31 17:21:15,795 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:21:15,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:21:15,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1088170107, now seen corresponding path program 122 times [2022-01-31 17:21:15,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:21:15,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [661897791] [2022-01-31 17:21:15,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:21:15,796 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:21:15,796 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:21:15,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:21:15,825 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:21:15,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:21:19,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:21:19,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:21:19,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:21:19,701 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:21:19,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [661897791] [2022-01-31 17:21:19,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [661897791] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:21:19,701 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:21:19,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [126] imperfect sequences [] total 126 [2022-01-31 17:21:19,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583569926] [2022-01-31 17:21:19,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:21:19,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2022-01-31 17:21:19,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:21:19,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2022-01-31 17:21:19,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7752, Invalid=7998, Unknown=0, NotChecked=0, Total=15750 [2022-01-31 17:21:19,703 INFO L87 Difference]: Start difference. First operand 292 states and 298 transitions. Second operand has 126 states, 126 states have (on average 2.1666666666666665) internal successors, (273), 125 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 17:21:23,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:21:23,619 INFO L93 Difference]: Finished difference Result 336 states and 348 transitions. [2022-01-31 17:21:23,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-01-31 17:21:23,620 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 2.1666666666666665) internal successors, (273), 125 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 287 [2022-01-31 17:21:23,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:21:23,620 INFO L225 Difference]: With dead ends: 336 [2022-01-31 17:21:23,620 INFO L226 Difference]: Without dead ends: 295 [2022-01-31 17:21:23,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7625 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=23250, Invalid=38502, Unknown=0, NotChecked=0, Total=61752 [2022-01-31 17:21:23,623 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 279 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:21:23,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 84 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 538 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:21:23,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-01-31 17:21:23,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 294. [2022-01-31 17:21:23,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 288 states have (on average 1.0243055555555556) internal successors, (295), 288 states have internal predecessors, (295), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:21:23,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 300 transitions. [2022-01-31 17:21:23,715 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 300 transitions. Word has length 287 [2022-01-31 17:21:23,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:21:23,715 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 300 transitions. [2022-01-31 17:21:23,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 2.1666666666666665) internal successors, (273), 125 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 17:21:23,715 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 300 transitions. [2022-01-31 17:21:23,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2022-01-31 17:21:23,716 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:21:23,716 INFO L514 BasicCegarLoop]: trace histogram [123, 123, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:21:23,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2022-01-31 17:21:23,716 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:21:23,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:21:23,716 INFO L85 PathProgramCache]: Analyzing trace with hash -2126637415, now seen corresponding path program 123 times [2022-01-31 17:21:23,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:21:23,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2067988297] [2022-01-31 17:21:23,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:21:23,717 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:21:23,717 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:21:23,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:21:23,745 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:21:23,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:21:26,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:21:26,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:21:26,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:21:26,870 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:21:26,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2067988297] [2022-01-31 17:21:26,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2067988297] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:21:26,870 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:21:26,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [127] imperfect sequences [] total 127 [2022-01-31 17:21:26,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934633065] [2022-01-31 17:21:26,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:21:26,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2022-01-31 17:21:26,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:21:26,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2022-01-31 17:21:26,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7877, Invalid=8125, Unknown=0, NotChecked=0, Total=16002 [2022-01-31 17:21:26,874 INFO L87 Difference]: Start difference. First operand 294 states and 300 transitions. Second operand has 127 states, 127 states have (on average 2.1653543307086616) internal successors, (275), 126 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 17:21:30,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:21:30,887 INFO L93 Difference]: Finished difference Result 338 states and 350 transitions. [2022-01-31 17:21:30,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-01-31 17:21:30,888 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 2.1653543307086616) internal successors, (275), 126 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 289 [2022-01-31 17:21:30,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:21:30,888 INFO L225 Difference]: With dead ends: 338 [2022-01-31 17:21:30,888 INFO L226 Difference]: Without dead ends: 297 [2022-01-31 17:21:30,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 249 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7749 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=23625, Invalid=39125, Unknown=0, NotChecked=0, Total=62750 [2022-01-31 17:21:30,891 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 281 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:21:30,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 74 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:21:30,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-01-31 17:21:30,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 296. [2022-01-31 17:21:30,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 290 states have (on average 1.0241379310344827) internal successors, (297), 290 states have internal predecessors, (297), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:21:30,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 302 transitions. [2022-01-31 17:21:30,985 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 302 transitions. Word has length 289 [2022-01-31 17:21:30,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:21:30,985 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 302 transitions. [2022-01-31 17:21:30,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 127 states have (on average 2.1653543307086616) internal successors, (275), 126 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 17:21:30,986 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 302 transitions. [2022-01-31 17:21:30,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2022-01-31 17:21:30,986 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:21:30,986 INFO L514 BasicCegarLoop]: trace histogram [124, 124, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:21:30,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2022-01-31 17:21:30,987 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:21:30,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:21:30,987 INFO L85 PathProgramCache]: Analyzing trace with hash 819787063, now seen corresponding path program 124 times [2022-01-31 17:21:30,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:21:30,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1737771382] [2022-01-31 17:21:30,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:21:30,988 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:21:30,988 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:21:30,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:21:31,016 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:21:31,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:21:34,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:21:34,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:21:34,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:21:34,187 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:21:34,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1737771382] [2022-01-31 17:21:34,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1737771382] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:21:34,187 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:21:34,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [128] imperfect sequences [] total 128 [2022-01-31 17:21:34,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557714072] [2022-01-31 17:21:34,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:21:34,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-01-31 17:21:34,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:21:34,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-01-31 17:21:34,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8003, Invalid=8253, Unknown=0, NotChecked=0, Total=16256 [2022-01-31 17:21:34,190 INFO L87 Difference]: Start difference. First operand 296 states and 302 transitions. Second operand has 128 states, 128 states have (on average 2.1640625) internal successors, (277), 127 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 17:21:38,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:21:38,469 INFO L93 Difference]: Finished difference Result 340 states and 352 transitions. [2022-01-31 17:21:38,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-01-31 17:21:38,470 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 2.1640625) internal successors, (277), 127 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 291 [2022-01-31 17:21:38,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:21:38,470 INFO L225 Difference]: With dead ends: 340 [2022-01-31 17:21:38,470 INFO L226 Difference]: Without dead ends: 299 [2022-01-31 17:21:38,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7874 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=24003, Invalid=39753, Unknown=0, NotChecked=0, Total=63756 [2022-01-31 17:21:38,474 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 283 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:21:38,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 64 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:21:38,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-01-31 17:21:38,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 298. [2022-01-31 17:21:38,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 292 states have (on average 1.023972602739726) internal successors, (299), 292 states have internal predecessors, (299), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:21:38,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 304 transitions. [2022-01-31 17:21:38,588 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 304 transitions. Word has length 291 [2022-01-31 17:21:38,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:21:38,588 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 304 transitions. [2022-01-31 17:21:38,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 2.1640625) internal successors, (277), 127 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 17:21:38,589 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 304 transitions. [2022-01-31 17:21:38,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2022-01-31 17:21:38,589 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:21:38,589 INFO L514 BasicCegarLoop]: trace histogram [125, 125, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:21:38,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2022-01-31 17:21:38,590 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:21:38,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:21:38,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1950262357, now seen corresponding path program 125 times [2022-01-31 17:21:38,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:21:38,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1376304088] [2022-01-31 17:21:38,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:21:38,591 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:21:38,591 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:21:38,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:21:38,619 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:21:38,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:21:41,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:21:41,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:21:41,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:21:41,792 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:21:41,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1376304088] [2022-01-31 17:21:41,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1376304088] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:21:41,792 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:21:41,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [129] imperfect sequences [] total 129 [2022-01-31 17:21:41,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10056392] [2022-01-31 17:21:41,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:21:41,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2022-01-31 17:21:41,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:21:41,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2022-01-31 17:21:41,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8130, Invalid=8382, Unknown=0, NotChecked=0, Total=16512 [2022-01-31 17:21:41,795 INFO L87 Difference]: Start difference. First operand 298 states and 304 transitions. Second operand has 129 states, 129 states have (on average 2.1627906976744184) internal successors, (279), 128 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 17:21:46,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:21:46,193 INFO L93 Difference]: Finished difference Result 342 states and 354 transitions. [2022-01-31 17:21:46,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-01-31 17:21:46,193 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 2.1627906976744184) internal successors, (279), 128 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 293 [2022-01-31 17:21:46,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:21:46,193 INFO L225 Difference]: With dead ends: 342 [2022-01-31 17:21:46,193 INFO L226 Difference]: Without dead ends: 301 [2022-01-31 17:21:46,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8000 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=24384, Invalid=40386, Unknown=0, NotChecked=0, Total=64770 [2022-01-31 17:21:46,197 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 285 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:21:46,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 64 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:21:46,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2022-01-31 17:21:46,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 300. [2022-01-31 17:21:46,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 294 states have (on average 1.0238095238095237) internal successors, (301), 294 states have internal predecessors, (301), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:21:46,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 306 transitions. [2022-01-31 17:21:46,294 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 306 transitions. Word has length 293 [2022-01-31 17:21:46,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:21:46,295 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 306 transitions. [2022-01-31 17:21:46,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 2.1627906976744184) internal successors, (279), 128 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 17:21:46,295 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 306 transitions. [2022-01-31 17:21:46,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2022-01-31 17:21:46,295 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:21:46,296 INFO L514 BasicCegarLoop]: trace histogram [126, 126, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:21:46,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2022-01-31 17:21:46,296 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:21:46,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:21:46,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1710294003, now seen corresponding path program 126 times [2022-01-31 17:21:46,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:21:46,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [131042186] [2022-01-31 17:21:46,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:21:46,297 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:21:46,297 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:21:46,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:21:46,342 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:21:46,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:21:49,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:21:49,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:21:49,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:21:49,889 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:21:49,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [131042186] [2022-01-31 17:21:49,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [131042186] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:21:49,889 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:21:49,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [130] imperfect sequences [] total 130 [2022-01-31 17:21:49,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651175477] [2022-01-31 17:21:49,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:21:49,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-01-31 17:21:49,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:21:49,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-01-31 17:21:49,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8258, Invalid=8512, Unknown=0, NotChecked=0, Total=16770 [2022-01-31 17:21:49,891 INFO L87 Difference]: Start difference. First operand 300 states and 306 transitions. Second operand has 130 states, 130 states have (on average 2.1615384615384614) internal successors, (281), 129 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 17:21:54,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:21:54,110 INFO L93 Difference]: Finished difference Result 344 states and 356 transitions. [2022-01-31 17:21:54,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-01-31 17:21:54,110 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 130 states have (on average 2.1615384615384614) internal successors, (281), 129 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 295 [2022-01-31 17:21:54,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:21:54,110 INFO L225 Difference]: With dead ends: 344 [2022-01-31 17:21:54,111 INFO L226 Difference]: Without dead ends: 303 [2022-01-31 17:21:54,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8127 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=24768, Invalid=41024, Unknown=0, NotChecked=0, Total=65792 [2022-01-31 17:21:54,114 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 287 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:21:54,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 59 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:21:54,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-01-31 17:21:54,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 302. [2022-01-31 17:21:54,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 296 states have (on average 1.0236486486486487) internal successors, (303), 296 states have internal predecessors, (303), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:21:54,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 308 transitions. [2022-01-31 17:21:54,213 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 308 transitions. Word has length 295 [2022-01-31 17:21:54,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:21:54,213 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 308 transitions. [2022-01-31 17:21:54,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 2.1615384615384614) internal successors, (281), 129 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 17:21:54,213 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 308 transitions. [2022-01-31 17:21:54,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2022-01-31 17:21:54,214 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:21:54,214 INFO L514 BasicCegarLoop]: trace histogram [127, 127, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:21:54,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2022-01-31 17:21:54,214 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:21:54,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:21:54,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1266027503, now seen corresponding path program 127 times [2022-01-31 17:21:54,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:21:54,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1630632254] [2022-01-31 17:21:54,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:21:54,215 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:21:54,215 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:21:54,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:21:54,247 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:21:54,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:21:57,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:21:57,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:21:57,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:21:57,670 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:21:57,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1630632254] [2022-01-31 17:21:57,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1630632254] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:21:57,670 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:21:57,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [131] imperfect sequences [] total 131 [2022-01-31 17:21:57,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60900919] [2022-01-31 17:21:57,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:21:57,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2022-01-31 17:21:57,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:21:57,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2022-01-31 17:21:57,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8387, Invalid=8643, Unknown=0, NotChecked=0, Total=17030 [2022-01-31 17:21:57,674 INFO L87 Difference]: Start difference. First operand 302 states and 308 transitions. Second operand has 131 states, 131 states have (on average 2.1603053435114505) internal successors, (283), 130 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 17:22:01,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:22:01,743 INFO L93 Difference]: Finished difference Result 346 states and 358 transitions. [2022-01-31 17:22:01,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-01-31 17:22:01,743 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 2.1603053435114505) internal successors, (283), 130 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 297 [2022-01-31 17:22:01,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:22:01,744 INFO L225 Difference]: With dead ends: 346 [2022-01-31 17:22:01,744 INFO L226 Difference]: Without dead ends: 305 [2022-01-31 17:22:01,746 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 17:22:01,746 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 289 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:22:01,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 69 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:22:01,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2022-01-31 17:22:01,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 304. [2022-01-31 17:22:01,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 298 states have (on average 1.023489932885906) internal successors, (305), 298 states have internal predecessors, (305), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:22:01,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 310 transitions. [2022-01-31 17:22:01,847 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 310 transitions. Word has length 297 [2022-01-31 17:22:01,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:22:01,847 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 310 transitions. [2022-01-31 17:22:01,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 2.1603053435114505) internal successors, (283), 130 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 17:22:01,847 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 310 transitions. [2022-01-31 17:22:01,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2022-01-31 17:22:01,848 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:22:01,848 INFO L514 BasicCegarLoop]: trace histogram [128, 128, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:22:01,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2022-01-31 17:22:01,848 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:22:01,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:22:01,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1062775633, now seen corresponding path program 128 times [2022-01-31 17:22:01,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:22:01,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [411878484] [2022-01-31 17:22:01,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:22:01,850 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:22:01,850 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:22:01,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:22:01,878 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:22:01,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:22:05,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:22:05,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:22:05,289 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 17:22:05,289 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:22:05,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [411878484] [2022-01-31 17:22:05,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [411878484] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:22:05,290 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:22:05,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [132] imperfect sequences [] total 132 [2022-01-31 17:22:05,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354717395] [2022-01-31 17:22:05,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:22:05,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2022-01-31 17:22:05,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:22:05,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2022-01-31 17:22:05,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8517, Invalid=8775, Unknown=0, NotChecked=0, Total=17292 [2022-01-31 17:22:05,294 INFO L87 Difference]: Start difference. First operand 304 states and 310 transitions. Second operand has 132 states, 132 states have (on average 2.159090909090909) internal successors, (285), 131 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 17:22:09,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:22:09,676 INFO L93 Difference]: Finished difference Result 348 states and 360 transitions. [2022-01-31 17:22:09,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-01-31 17:22:09,676 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 2.159090909090909) internal successors, (285), 131 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 299 [2022-01-31 17:22:09,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:22:09,677 INFO L225 Difference]: With dead ends: 348 [2022-01-31 17:22:09,677 INFO L226 Difference]: Without dead ends: 307 [2022-01-31 17:22:09,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 259 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8384 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=25545, Invalid=42315, Unknown=0, NotChecked=0, Total=67860 [2022-01-31 17:22:09,681 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 291 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:22:09,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 64 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:22:09,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2022-01-31 17:22:09,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 306. [2022-01-31 17:22:09,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 300 states have (on average 1.0233333333333334) internal successors, (307), 300 states have internal predecessors, (307), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:22:09,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 312 transitions. [2022-01-31 17:22:09,795 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 312 transitions. Word has length 299 [2022-01-31 17:22:09,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:22:09,795 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 312 transitions. [2022-01-31 17:22:09,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 132 states have (on average 2.159090909090909) internal successors, (285), 131 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 17:22:09,796 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 312 transitions. [2022-01-31 17:22:09,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2022-01-31 17:22:09,796 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:22:09,796 INFO L514 BasicCegarLoop]: trace histogram [129, 129, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:22:09,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2022-01-31 17:22:09,796 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:22:09,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:22:09,797 INFO L85 PathProgramCache]: Analyzing trace with hash 988743117, now seen corresponding path program 129 times [2022-01-31 17:22:09,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:22:09,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1958902875] [2022-01-31 17:22:09,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:22:09,798 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:22:09,798 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:22:09,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:22:09,827 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:22:09,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:22:15,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:22:15,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:22:15,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:22:15,009 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:22:15,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1958902875] [2022-01-31 17:22:15,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1958902875] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:22:15,009 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:22:15,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [133] imperfect sequences [] total 133 [2022-01-31 17:22:15,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600822157] [2022-01-31 17:22:15,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:22:15,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2022-01-31 17:22:15,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:22:15,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2022-01-31 17:22:15,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8648, Invalid=8908, Unknown=0, NotChecked=0, Total=17556 [2022-01-31 17:22:15,013 INFO L87 Difference]: Start difference. First operand 306 states and 312 transitions. Second operand has 133 states, 133 states have (on average 2.1578947368421053) internal successors, (287), 132 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 17:22:20,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:22:20,594 INFO L93 Difference]: Finished difference Result 350 states and 362 transitions. [2022-01-31 17:22:20,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-01-31 17:22:20,594 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 133 states have (on average 2.1578947368421053) internal successors, (287), 132 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 301 [2022-01-31 17:22:20,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:22:20,595 INFO L225 Difference]: With dead ends: 350 [2022-01-31 17:22:20,595 INFO L226 Difference]: Without dead ends: 309 [2022-01-31 17:22:20,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 261 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8514 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=25938, Invalid=42968, Unknown=0, NotChecked=0, Total=68906 [2022-01-31 17:22:20,598 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 293 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:22:20,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 74 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:22:20,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2022-01-31 17:22:20,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 308. [2022-01-31 17:22:20,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 302 states have (on average 1.0231788079470199) internal successors, (309), 302 states have internal predecessors, (309), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:22:20,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 314 transitions. [2022-01-31 17:22:20,703 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 314 transitions. Word has length 301 [2022-01-31 17:22:20,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:22:20,703 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 314 transitions. [2022-01-31 17:22:20,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 133 states, 133 states have (on average 2.1578947368421053) internal successors, (287), 132 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 17:22:20,703 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 314 transitions. [2022-01-31 17:22:20,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2022-01-31 17:22:20,704 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:22:20,704 INFO L514 BasicCegarLoop]: trace histogram [130, 130, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:22:20,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2022-01-31 17:22:20,704 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:22:20,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:22:20,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1108273003, now seen corresponding path program 130 times [2022-01-31 17:22:20,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:22:20,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1950732250] [2022-01-31 17:22:20,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:22:20,706 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:22:20,706 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:22:20,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:22:20,736 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:22:20,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:22:24,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:22:24,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:22:24,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:22:24,861 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:22:24,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1950732250] [2022-01-31 17:22:24,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1950732250] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:22:24,861 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:22:24,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [134] imperfect sequences [] total 134 [2022-01-31 17:22:24,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885656278] [2022-01-31 17:22:24,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:22:24,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2022-01-31 17:22:24,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:22:24,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2022-01-31 17:22:24,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8780, Invalid=9042, Unknown=0, NotChecked=0, Total=17822 [2022-01-31 17:22:24,864 INFO L87 Difference]: Start difference. First operand 308 states and 314 transitions. Second operand has 134 states, 134 states have (on average 2.156716417910448) internal successors, (289), 133 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 17:22:29,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:22:29,134 INFO L93 Difference]: Finished difference Result 352 states and 364 transitions. [2022-01-31 17:22:29,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2022-01-31 17:22:29,134 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 2.156716417910448) internal successors, (289), 133 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 303 [2022-01-31 17:22:29,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:22:29,135 INFO L225 Difference]: With dead ends: 352 [2022-01-31 17:22:29,135 INFO L226 Difference]: Without dead ends: 311 [2022-01-31 17:22:29,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8645 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=26334, Invalid=43626, Unknown=0, NotChecked=0, Total=69960 [2022-01-31 17:22:29,137 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 295 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:22:29,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 74 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:22:29,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-01-31 17:22:29,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 310. [2022-01-31 17:22:29,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 304 states have (on average 1.0230263157894737) internal successors, (311), 304 states have internal predecessors, (311), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:22:29,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 316 transitions. [2022-01-31 17:22:29,242 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 316 transitions. Word has length 303 [2022-01-31 17:22:29,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:22:29,242 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 316 transitions. [2022-01-31 17:22:29,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 2.156716417910448) internal successors, (289), 133 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 17:22:29,242 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 316 transitions. [2022-01-31 17:22:29,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2022-01-31 17:22:29,243 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:22:29,243 INFO L514 BasicCegarLoop]: trace histogram [131, 131, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:22:29,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2022-01-31 17:22:29,243 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:22:29,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:22:29,244 INFO L85 PathProgramCache]: Analyzing trace with hash 12376457, now seen corresponding path program 131 times [2022-01-31 17:22:29,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:22:29,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [305246389] [2022-01-31 17:22:29,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:22:29,245 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:22:29,245 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:22:29,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:22:29,285 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:22:29,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:22:33,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:22:33,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:22:33,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:22:33,538 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:22:33,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [305246389] [2022-01-31 17:22:33,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [305246389] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:22:33,538 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:22:33,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [135] imperfect sequences [] total 135 [2022-01-31 17:22:33,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442660540] [2022-01-31 17:22:33,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:22:33,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2022-01-31 17:22:33,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:22:33,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2022-01-31 17:22:33,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8913, Invalid=9177, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 17:22:33,541 INFO L87 Difference]: Start difference. First operand 310 states and 316 transitions. Second operand has 135 states, 135 states have (on average 2.1555555555555554) internal successors, (291), 134 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 17:22:38,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:22:38,085 INFO L93 Difference]: Finished difference Result 354 states and 366 transitions. [2022-01-31 17:22:38,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2022-01-31 17:22:38,085 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 2.1555555555555554) internal successors, (291), 134 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 305 [2022-01-31 17:22:38,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:22:38,088 INFO L225 Difference]: With dead ends: 354 [2022-01-31 17:22:38,088 INFO L226 Difference]: Without dead ends: 313 [2022-01-31 17:22:38,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 265 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8777 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=26733, Invalid=44289, Unknown=0, NotChecked=0, Total=71022 [2022-01-31 17:22:38,091 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 297 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:22:38,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 64 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:22:38,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2022-01-31 17:22:38,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 312. [2022-01-31 17:22:38,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 306 states have (on average 1.022875816993464) internal successors, (313), 306 states have internal predecessors, (313), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:22:38,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 318 transitions. [2022-01-31 17:22:38,197 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 318 transitions. Word has length 305 [2022-01-31 17:22:38,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:22:38,197 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 318 transitions. [2022-01-31 17:22:38,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 2.1555555555555554) internal successors, (291), 134 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 17:22:38,197 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 318 transitions. [2022-01-31 17:22:38,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2022-01-31 17:22:38,198 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:22:38,198 INFO L514 BasicCegarLoop]: trace histogram [132, 132, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:22:38,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2022-01-31 17:22:38,198 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:22:38,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:22:38,198 INFO L85 PathProgramCache]: Analyzing trace with hash -877216729, now seen corresponding path program 132 times [2022-01-31 17:22:38,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:22:38,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1671343639] [2022-01-31 17:22:38,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:22:38,199 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:22:38,199 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:22:38,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:22:38,229 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:22:38,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:22:41,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:22:41,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:22:41,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:22:41,844 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:22:41,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1671343639] [2022-01-31 17:22:41,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1671343639] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:22:41,844 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:22:41,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [136] imperfect sequences [] total 136 [2022-01-31 17:22:41,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301211710] [2022-01-31 17:22:41,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:22:41,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 136 states [2022-01-31 17:22:41,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:22:41,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2022-01-31 17:22:41,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9047, Invalid=9313, Unknown=0, NotChecked=0, Total=18360 [2022-01-31 17:22:41,848 INFO L87 Difference]: Start difference. First operand 312 states and 318 transitions. Second operand has 136 states, 136 states have (on average 2.1544117647058822) internal successors, (293), 135 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 17:22:46,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:22:46,996 INFO L93 Difference]: Finished difference Result 356 states and 368 transitions. [2022-01-31 17:22:46,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2022-01-31 17:22:46,997 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 136 states have (on average 2.1544117647058822) internal successors, (293), 135 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 307 [2022-01-31 17:22:46,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:22:46,997 INFO L225 Difference]: With dead ends: 356 [2022-01-31 17:22:46,997 INFO L226 Difference]: Without dead ends: 315 [2022-01-31 17:22:47,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 267 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8910 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=27135, Invalid=44957, Unknown=0, NotChecked=0, Total=72092 [2022-01-31 17:22:47,000 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 299 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:22:47,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 64 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:22:47,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2022-01-31 17:22:47,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 314. [2022-01-31 17:22:47,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 308 states have (on average 1.0227272727272727) internal successors, (315), 308 states have internal predecessors, (315), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:22:47,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 320 transitions. [2022-01-31 17:22:47,107 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 320 transitions. Word has length 307 [2022-01-31 17:22:47,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:22:47,108 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 320 transitions. [2022-01-31 17:22:47,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 136 states, 136 states have (on average 2.1544117647058822) internal successors, (293), 135 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 17:22:47,108 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 320 transitions. [2022-01-31 17:22:47,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2022-01-31 17:22:47,108 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:22:47,109 INFO L514 BasicCegarLoop]: trace histogram [133, 133, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:22:47,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2022-01-31 17:22:47,109 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:22:47,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:22:47,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1077776571, now seen corresponding path program 133 times [2022-01-31 17:22:47,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:22:47,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1997831232] [2022-01-31 17:22:47,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:22:47,110 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:22:47,110 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:22:47,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:22:47,141 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:22:47,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:22:51,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:22:51,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:22:51,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:22:51,009 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:22:51,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1997831232] [2022-01-31 17:22:51,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1997831232] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:22:51,009 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:22:51,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [137] imperfect sequences [] total 137 [2022-01-31 17:22:51,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693731965] [2022-01-31 17:22:51,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:22:51,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2022-01-31 17:22:51,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:22:51,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2022-01-31 17:22:51,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9182, Invalid=9450, Unknown=0, NotChecked=0, Total=18632 [2022-01-31 17:22:51,012 INFO L87 Difference]: Start difference. First operand 314 states and 320 transitions. Second operand has 137 states, 137 states have (on average 2.153284671532847) internal successors, (295), 136 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 17:22:55,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:22:55,848 INFO L93 Difference]: Finished difference Result 358 states and 370 transitions. [2022-01-31 17:22:55,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-01-31 17:22:55,848 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 137 states have (on average 2.153284671532847) internal successors, (295), 136 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 309 [2022-01-31 17:22:55,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:22:55,849 INFO L225 Difference]: With dead ends: 358 [2022-01-31 17:22:55,849 INFO L226 Difference]: Without dead ends: 317 [2022-01-31 17:22:55,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9044 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=27540, Invalid=45630, Unknown=0, NotChecked=0, Total=73170 [2022-01-31 17:22:55,852 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 301 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:22:55,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 54 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:22:55,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2022-01-31 17:22:55,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 316. [2022-01-31 17:22:55,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 310 states have (on average 1.0225806451612902) internal successors, (317), 310 states have internal predecessors, (317), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:22:55,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 322 transitions. [2022-01-31 17:22:55,960 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 322 transitions. Word has length 309 [2022-01-31 17:22:55,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:22:55,961 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 322 transitions. [2022-01-31 17:22:55,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 137 states, 137 states have (on average 2.153284671532847) internal successors, (295), 136 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 17:22:55,961 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 322 transitions. [2022-01-31 17:22:55,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2022-01-31 17:22:55,961 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:22:55,962 INFO L514 BasicCegarLoop]: trace histogram [134, 134, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:22:55,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2022-01-31 17:22:55,962 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:22:55,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:22:55,962 INFO L85 PathProgramCache]: Analyzing trace with hash -542256413, now seen corresponding path program 134 times [2022-01-31 17:22:55,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:22:55,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [256004200] [2022-01-31 17:22:55,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:22:55,963 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:22:55,963 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:22:55,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:22:55,994 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:22:56,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:22:59,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:22:59,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:22:59,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:22:59,964 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:22:59,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [256004200] [2022-01-31 17:22:59,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [256004200] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:22:59,964 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:22:59,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [138] imperfect sequences [] total 138 [2022-01-31 17:22:59,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459140485] [2022-01-31 17:22:59,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:22:59,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 138 states [2022-01-31 17:22:59,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:22:59,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2022-01-31 17:22:59,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9318, Invalid=9588, Unknown=0, NotChecked=0, Total=18906 [2022-01-31 17:22:59,975 INFO L87 Difference]: Start difference. First operand 316 states and 322 transitions. Second operand has 138 states, 138 states have (on average 2.152173913043478) internal successors, (297), 137 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 17:23:04,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:23:04,793 INFO L93 Difference]: Finished difference Result 360 states and 372 transitions. [2022-01-31 17:23:04,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2022-01-31 17:23:04,793 INFO L78 Accepts]: Start accepts. Automaton has has 138 states, 138 states have (on average 2.152173913043478) internal successors, (297), 137 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 311 [2022-01-31 17:23:04,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:23:04,794 INFO L225 Difference]: With dead ends: 360 [2022-01-31 17:23:04,794 INFO L226 Difference]: Without dead ends: 319 [2022-01-31 17:23:04,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 271 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9179 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=27948, Invalid=46308, Unknown=0, NotChecked=0, Total=74256 [2022-01-31 17:23:04,797 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 303 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:23:04,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [304 Valid, 74 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:23:04,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2022-01-31 17:23:04,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 318. [2022-01-31 17:23:04,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 312 states have (on average 1.0224358974358974) internal successors, (319), 312 states have internal predecessors, (319), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:23:04,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 324 transitions. [2022-01-31 17:23:04,906 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 324 transitions. Word has length 311 [2022-01-31 17:23:04,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:23:04,907 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 324 transitions. [2022-01-31 17:23:04,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 138 states, 138 states have (on average 2.152173913043478) internal successors, (297), 137 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 17:23:04,907 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 324 transitions. [2022-01-31 17:23:04,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2022-01-31 17:23:04,907 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:23:04,908 INFO L514 BasicCegarLoop]: trace histogram [135, 135, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:23:04,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2022-01-31 17:23:04,908 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:23:04,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:23:04,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1303460095, now seen corresponding path program 135 times [2022-01-31 17:23:04,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:23:04,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [835237324] [2022-01-31 17:23:04,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:23:04,909 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:23:04,909 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:23:04,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:23:04,940 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:23:05,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:23:09,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:23:09,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:23:09,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:23:09,136 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:23:09,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [835237324] [2022-01-31 17:23:09,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [835237324] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:23:09,136 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:23:09,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [139] imperfect sequences [] total 139 [2022-01-31 17:23:09,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500411115] [2022-01-31 17:23:09,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:23:09,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 139 states [2022-01-31 17:23:09,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:23:09,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2022-01-31 17:23:09,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9455, Invalid=9727, Unknown=0, NotChecked=0, Total=19182 [2022-01-31 17:23:09,140 INFO L87 Difference]: Start difference. First operand 318 states and 324 transitions. Second operand has 139 states, 139 states have (on average 2.1510791366906474) internal successors, (299), 138 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 17:23:13,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:23:13,724 INFO L93 Difference]: Finished difference Result 362 states and 374 transitions. [2022-01-31 17:23:13,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2022-01-31 17:23:13,724 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 139 states have (on average 2.1510791366906474) internal successors, (299), 138 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 313 [2022-01-31 17:23:13,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:23:13,725 INFO L225 Difference]: With dead ends: 362 [2022-01-31 17:23:13,725 INFO L226 Difference]: Without dead ends: 321 [2022-01-31 17:23:13,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 273 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9315 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=28359, Invalid=46991, Unknown=0, NotChecked=0, Total=75350 [2022-01-31 17:23:13,729 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 305 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:23:13,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 74 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:23:13,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-01-31 17:23:13,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 320. [2022-01-31 17:23:13,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 314 states have (on average 1.0222929936305734) internal successors, (321), 314 states have internal predecessors, (321), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:23:13,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 326 transitions. [2022-01-31 17:23:13,895 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 326 transitions. Word has length 313 [2022-01-31 17:23:13,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:23:13,895 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 326 transitions. [2022-01-31 17:23:13,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 139 states, 139 states have (on average 2.1510791366906474) internal successors, (299), 138 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 17:23:13,895 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 326 transitions. [2022-01-31 17:23:13,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2022-01-31 17:23:13,896 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:23:13,896 INFO L514 BasicCegarLoop]: trace histogram [136, 136, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:23:13,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2022-01-31 17:23:13,897 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:23:13,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:23:13,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1619209119, now seen corresponding path program 136 times [2022-01-31 17:23:13,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:23:13,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [980485296] [2022-01-31 17:23:13,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:23:13,898 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:23:13,898 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:23:13,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:23:13,956 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:23:14,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:23:17,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:23:17,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:23:17,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:23:17,692 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:23:17,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [980485296] [2022-01-31 17:23:17,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [980485296] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:23:17,692 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:23:17,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [140] imperfect sequences [] total 140 [2022-01-31 17:23:17,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757800066] [2022-01-31 17:23:17,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:23:17,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2022-01-31 17:23:17,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:23:17,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2022-01-31 17:23:17,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9593, Invalid=9867, Unknown=0, NotChecked=0, Total=19460 [2022-01-31 17:23:17,694 INFO L87 Difference]: Start difference. First operand 320 states and 326 transitions. Second operand has 140 states, 140 states have (on average 2.15) internal successors, (301), 139 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 17:23:22,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:23:22,527 INFO L93 Difference]: Finished difference Result 364 states and 376 transitions. [2022-01-31 17:23:22,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2022-01-31 17:23:22,528 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 2.15) internal successors, (301), 139 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 315 [2022-01-31 17:23:22,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:23:22,528 INFO L225 Difference]: With dead ends: 364 [2022-01-31 17:23:22,528 INFO L226 Difference]: Without dead ends: 323 [2022-01-31 17:23:22,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9452 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=28773, Invalid=47679, Unknown=0, NotChecked=0, Total=76452 [2022-01-31 17:23:22,533 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 307 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:23:22,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [308 Valid, 79 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:23:22,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2022-01-31 17:23:22,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 322. [2022-01-31 17:23:22,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 316 states have (on average 1.0221518987341771) internal successors, (323), 316 states have internal predecessors, (323), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:23:22,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 328 transitions. [2022-01-31 17:23:22,665 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 328 transitions. Word has length 315 [2022-01-31 17:23:22,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:23:22,665 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 328 transitions. [2022-01-31 17:23:22,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 140 states have (on average 2.15) internal successors, (301), 139 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 17:23:22,665 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 328 transitions. [2022-01-31 17:23:22,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2022-01-31 17:23:22,666 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:23:22,666 INFO L514 BasicCegarLoop]: trace histogram [137, 137, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:23:22,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2022-01-31 17:23:22,666 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:23:22,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:23:22,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1395712189, now seen corresponding path program 137 times [2022-01-31 17:23:22,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:23:22,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1122648037] [2022-01-31 17:23:22,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:23:22,667 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:23:22,667 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:23:22,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:23:22,697 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:23:22,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:23:26,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:23:26,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:23:26,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:23:26,681 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:23:26,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1122648037] [2022-01-31 17:23:26,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1122648037] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:23:26,681 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:23:26,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [141] imperfect sequences [] total 141 [2022-01-31 17:23:26,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154623975] [2022-01-31 17:23:26,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:23:26,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 141 states [2022-01-31 17:23:26,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:23:26,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2022-01-31 17:23:26,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9732, Invalid=10008, Unknown=0, NotChecked=0, Total=19740 [2022-01-31 17:23:26,685 INFO L87 Difference]: Start difference. First operand 322 states and 328 transitions. Second operand has 141 states, 141 states have (on average 2.148936170212766) internal successors, (303), 140 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 17:23:31,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:23:31,244 INFO L93 Difference]: Finished difference Result 366 states and 378 transitions. [2022-01-31 17:23:31,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2022-01-31 17:23:31,244 INFO L78 Accepts]: Start accepts. Automaton has has 141 states, 141 states have (on average 2.148936170212766) internal successors, (303), 140 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 317 [2022-01-31 17:23:31,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:23:31,245 INFO L225 Difference]: With dead ends: 366 [2022-01-31 17:23:31,245 INFO L226 Difference]: Without dead ends: 325 [2022-01-31 17:23:31,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 277 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9590 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=29190, Invalid=48372, Unknown=0, NotChecked=0, Total=77562 [2022-01-31 17:23:31,247 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 309 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:23:31,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [310 Valid, 69 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:23:31,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2022-01-31 17:23:31,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 324. [2022-01-31 17:23:31,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 318 states have (on average 1.0220125786163523) internal successors, (325), 318 states have internal predecessors, (325), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:23:31,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 330 transitions. [2022-01-31 17:23:31,363 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 330 transitions. Word has length 317 [2022-01-31 17:23:31,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:23:31,363 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 330 transitions. [2022-01-31 17:23:31,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 141 states, 141 states have (on average 2.148936170212766) internal successors, (303), 140 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 17:23:31,363 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 330 transitions. [2022-01-31 17:23:31,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2022-01-31 17:23:31,364 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:23:31,364 INFO L514 BasicCegarLoop]: trace histogram [138, 138, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:23:31,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2022-01-31 17:23:31,364 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:23:31,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:23:31,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1363527259, now seen corresponding path program 138 times [2022-01-31 17:23:31,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:23:31,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1259954685] [2022-01-31 17:23:31,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:23:31,370 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:23:31,370 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:23:31,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:23:31,400 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:23:31,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:23:35,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:23:35,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:23:35,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:23:35,477 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:23:35,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1259954685] [2022-01-31 17:23:35,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1259954685] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:23:35,477 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:23:35,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [142] imperfect sequences [] total 142 [2022-01-31 17:23:35,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088977836] [2022-01-31 17:23:35,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:23:35,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 142 states [2022-01-31 17:23:35,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:23:35,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2022-01-31 17:23:35,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9872, Invalid=10150, Unknown=0, NotChecked=0, Total=20022 [2022-01-31 17:23:35,482 INFO L87 Difference]: Start difference. First operand 324 states and 330 transitions. Second operand has 142 states, 142 states have (on average 2.147887323943662) internal successors, (305), 141 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 17:23:40,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:23:40,307 INFO L93 Difference]: Finished difference Result 368 states and 380 transitions. [2022-01-31 17:23:40,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2022-01-31 17:23:40,307 INFO L78 Accepts]: Start accepts. Automaton has has 142 states, 142 states have (on average 2.147887323943662) internal successors, (305), 141 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 319 [2022-01-31 17:23:40,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:23:40,308 INFO L225 Difference]: With dead ends: 368 [2022-01-31 17:23:40,308 INFO L226 Difference]: Without dead ends: 327 [2022-01-31 17:23:40,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 279 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9729 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=29610, Invalid=49070, Unknown=0, NotChecked=0, Total=78680 [2022-01-31 17:23:40,311 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 311 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:23:40,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 64 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:23:40,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2022-01-31 17:23:40,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 326. [2022-01-31 17:23:40,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 320 states have (on average 1.021875) internal successors, (327), 320 states have internal predecessors, (327), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:23:40,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 332 transitions. [2022-01-31 17:23:40,428 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 332 transitions. Word has length 319 [2022-01-31 17:23:40,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:23:40,428 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 332 transitions. [2022-01-31 17:23:40,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 142 states, 142 states have (on average 2.147887323943662) internal successors, (305), 141 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 17:23:40,428 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 332 transitions. [2022-01-31 17:23:40,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2022-01-31 17:23:40,429 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:23:40,429 INFO L514 BasicCegarLoop]: trace histogram [139, 139, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:23:40,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2022-01-31 17:23:40,429 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:23:40,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:23:40,430 INFO L85 PathProgramCache]: Analyzing trace with hash 498580601, now seen corresponding path program 139 times [2022-01-31 17:23:40,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:23:40,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [647972058] [2022-01-31 17:23:40,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:23:40,431 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:23:40,431 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:23:40,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:23:40,462 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:23:40,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:23:44,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:23:44,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:23:44,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:23:44,228 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:23:44,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [647972058] [2022-01-31 17:23:44,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [647972058] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:23:44,228 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:23:44,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [143] imperfect sequences [] total 143 [2022-01-31 17:23:44,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598369824] [2022-01-31 17:23:44,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:23:44,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 143 states [2022-01-31 17:23:44,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:23:44,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2022-01-31 17:23:44,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10013, Invalid=10293, Unknown=0, NotChecked=0, Total=20306 [2022-01-31 17:23:44,230 INFO L87 Difference]: Start difference. First operand 326 states and 332 transitions. Second operand has 143 states, 143 states have (on average 2.1468531468531467) internal successors, (307), 142 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 17:23:48,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:23:48,807 INFO L93 Difference]: Finished difference Result 370 states and 382 transitions. [2022-01-31 17:23:48,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2022-01-31 17:23:48,808 INFO L78 Accepts]: Start accepts. Automaton has has 143 states, 143 states have (on average 2.1468531468531467) internal successors, (307), 142 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 321 [2022-01-31 17:23:48,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:23:48,808 INFO L225 Difference]: With dead ends: 370 [2022-01-31 17:23:48,808 INFO L226 Difference]: Without dead ends: 329 [2022-01-31 17:23:48,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 281 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9869 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=30033, Invalid=49773, Unknown=0, NotChecked=0, Total=79806 [2022-01-31 17:23:48,813 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 313 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:23:48,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 74 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:23:48,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-01-31 17:23:48,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 328. [2022-01-31 17:23:48,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 322 states have (on average 1.0217391304347827) internal successors, (329), 322 states have internal predecessors, (329), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:23:48,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 334 transitions. [2022-01-31 17:23:48,956 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 334 transitions. Word has length 321 [2022-01-31 17:23:48,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:23:48,956 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 334 transitions. [2022-01-31 17:23:48,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 143 states, 143 states have (on average 2.1468531468531467) internal successors, (307), 142 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 17:23:48,956 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 334 transitions. [2022-01-31 17:23:48,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2022-01-31 17:23:48,957 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:23:48,957 INFO L514 BasicCegarLoop]: trace histogram [140, 140, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:23:48,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2022-01-31 17:23:48,957 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:23:48,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:23:48,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1786469609, now seen corresponding path program 140 times [2022-01-31 17:23:48,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:23:48,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [568476265] [2022-01-31 17:23:48,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:23:48,958 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:23:48,958 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:23:48,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:23:48,991 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:23:49,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:23:52,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:23:52,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:23:52,774 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 17:23:52,775 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:23:52,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [568476265] [2022-01-31 17:23:52,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [568476265] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:23:52,775 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:23:52,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [144] imperfect sequences [] total 144 [2022-01-31 17:23:52,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712468854] [2022-01-31 17:23:52,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:23:52,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 144 states [2022-01-31 17:23:52,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:23:52,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2022-01-31 17:23:52,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10155, Invalid=10437, Unknown=0, NotChecked=0, Total=20592 [2022-01-31 17:23:52,778 INFO L87 Difference]: Start difference. First operand 328 states and 334 transitions. Second operand has 144 states, 144 states have (on average 2.1458333333333335) internal successors, (309), 143 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 17:23:58,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:23:58,550 INFO L93 Difference]: Finished difference Result 372 states and 384 transitions. [2022-01-31 17:23:58,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2022-01-31 17:23:58,550 INFO L78 Accepts]: Start accepts. Automaton has has 144 states, 144 states have (on average 2.1458333333333335) internal successors, (309), 143 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 323 [2022-01-31 17:23:58,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:23:58,551 INFO L225 Difference]: With dead ends: 372 [2022-01-31 17:23:58,551 INFO L226 Difference]: Without dead ends: 331 [2022-01-31 17:23:58,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 283 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10010 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=30459, Invalid=50481, Unknown=0, NotChecked=0, Total=80940 [2022-01-31 17:23:58,554 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 315 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:23:58,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [316 Valid, 64 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:23:58,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-01-31 17:23:58,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 330. [2022-01-31 17:23:58,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 324 states have (on average 1.021604938271605) internal successors, (331), 324 states have internal predecessors, (331), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:23:58,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 336 transitions. [2022-01-31 17:23:58,675 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 336 transitions. Word has length 323 [2022-01-31 17:23:58,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:23:58,675 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 336 transitions. [2022-01-31 17:23:58,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 144 states, 144 states have (on average 2.1458333333333335) internal successors, (309), 143 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 17:23:58,675 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 336 transitions. [2022-01-31 17:23:58,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2022-01-31 17:23:58,676 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:23:58,676 INFO L514 BasicCegarLoop]: trace histogram [141, 141, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:23:58,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2022-01-31 17:23:58,676 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:23:58,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:23:58,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1303534133, now seen corresponding path program 141 times [2022-01-31 17:23:58,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:23:58,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [954787770] [2022-01-31 17:23:58,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:23:58,697 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:23:58,697 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:23:58,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:23:58,739 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:23:58,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:24:03,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:24:03,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:24:03,937 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 17:24:03,937 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:24:03,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [954787770] [2022-01-31 17:24:03,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [954787770] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:24:03,937 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:24:03,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [145] imperfect sequences [] total 145 [2022-01-31 17:24:03,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015392503] [2022-01-31 17:24:03,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:24:03,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 145 states [2022-01-31 17:24:03,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:24:03,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2022-01-31 17:24:03,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10298, Invalid=10582, Unknown=0, NotChecked=0, Total=20880 [2022-01-31 17:24:03,941 INFO L87 Difference]: Start difference. First operand 330 states and 336 transitions. Second operand has 145 states, 145 states have (on average 2.1448275862068966) internal successors, (311), 144 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 17:24:08,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:24:08,782 INFO L93 Difference]: Finished difference Result 374 states and 386 transitions. [2022-01-31 17:24:08,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2022-01-31 17:24:08,783 INFO L78 Accepts]: Start accepts. Automaton has has 145 states, 145 states have (on average 2.1448275862068966) internal successors, (311), 144 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 325 [2022-01-31 17:24:08,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:24:08,783 INFO L225 Difference]: With dead ends: 374 [2022-01-31 17:24:08,783 INFO L226 Difference]: Without dead ends: 333 [2022-01-31 17:24:08,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 285 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10152 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=30888, Invalid=51194, Unknown=0, NotChecked=0, Total=82082 [2022-01-31 17:24:08,787 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 317 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:24:08,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 69 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:24:08,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-01-31 17:24:08,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 332. [2022-01-31 17:24:08,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 326 states have (on average 1.021472392638037) internal successors, (333), 326 states have internal predecessors, (333), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:24:08,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 338 transitions. [2022-01-31 17:24:08,928 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 338 transitions. Word has length 325 [2022-01-31 17:24:08,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:24:08,928 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 338 transitions. [2022-01-31 17:24:08,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 145 states, 145 states have (on average 2.1448275862068966) internal successors, (311), 144 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 17:24:08,928 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 338 transitions. [2022-01-31 17:24:08,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2022-01-31 17:24:08,929 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:24:08,929 INFO L514 BasicCegarLoop]: trace histogram [142, 142, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:24:08,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2022-01-31 17:24:08,929 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:24:08,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:24:08,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1320238637, now seen corresponding path program 142 times [2022-01-31 17:24:08,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:24:08,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [118079577] [2022-01-31 17:24:08,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:24:08,931 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:24:08,931 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:24:08,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:24:08,963 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:24:09,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:24:12,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:24:12,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:24:12,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:24:12,906 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:24:12,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [118079577] [2022-01-31 17:24:12,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [118079577] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:24:12,906 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:24:12,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [146] imperfect sequences [] total 146 [2022-01-31 17:24:12,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051395824] [2022-01-31 17:24:12,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:24:12,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2022-01-31 17:24:12,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:24:12,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2022-01-31 17:24:12,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10442, Invalid=10728, Unknown=0, NotChecked=0, Total=21170 [2022-01-31 17:24:12,909 INFO L87 Difference]: Start difference. First operand 332 states and 338 transitions. Second operand has 146 states, 146 states have (on average 2.143835616438356) internal successors, (313), 145 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 17:24:17,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:24:17,810 INFO L93 Difference]: Finished difference Result 376 states and 388 transitions. [2022-01-31 17:24:17,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2022-01-31 17:24:17,810 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 146 states have (on average 2.143835616438356) internal successors, (313), 145 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 327 [2022-01-31 17:24:17,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:24:17,811 INFO L225 Difference]: With dead ends: 376 [2022-01-31 17:24:17,811 INFO L226 Difference]: Without dead ends: 335 [2022-01-31 17:24:17,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 287 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10295 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=31320, Invalid=51912, Unknown=0, NotChecked=0, Total=83232 [2022-01-31 17:24:17,814 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 319 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:24:17,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 84 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:24:17,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2022-01-31 17:24:17,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 334. [2022-01-31 17:24:17,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 328 states have (on average 1.021341463414634) internal successors, (335), 328 states have internal predecessors, (335), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:24:17,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 340 transitions. [2022-01-31 17:24:17,939 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 340 transitions. Word has length 327 [2022-01-31 17:24:17,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:24:17,939 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 340 transitions. [2022-01-31 17:24:17,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 146 states, 146 states have (on average 2.143835616438356) internal successors, (313), 145 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 17:24:17,940 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 340 transitions. [2022-01-31 17:24:17,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2022-01-31 17:24:17,940 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:24:17,941 INFO L514 BasicCegarLoop]: trace histogram [143, 143, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:24:17,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2022-01-31 17:24:17,941 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:24:17,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:24:17,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1620067855, now seen corresponding path program 143 times [2022-01-31 17:24:17,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:24:17,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [601856863] [2022-01-31 17:24:17,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:24:17,942 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:24:17,942 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:24:17,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:24:17,975 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:24:18,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:24:22,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:24:22,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:24:22,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:24:22,629 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:24:22,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [601856863] [2022-01-31 17:24:22,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [601856863] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:24:22,629 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:24:22,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [147] imperfect sequences [] total 147 [2022-01-31 17:24:22,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519728117] [2022-01-31 17:24:22,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:24:22,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 147 states [2022-01-31 17:24:22,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:24:22,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2022-01-31 17:24:22,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10587, Invalid=10875, Unknown=0, NotChecked=0, Total=21462 [2022-01-31 17:24:22,632 INFO L87 Difference]: Start difference. First operand 334 states and 340 transitions. Second operand has 147 states, 147 states have (on average 2.142857142857143) internal successors, (315), 146 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 17:24:27,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:24:27,869 INFO L93 Difference]: Finished difference Result 378 states and 390 transitions. [2022-01-31 17:24:27,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2022-01-31 17:24:27,869 INFO L78 Accepts]: Start accepts. Automaton has has 147 states, 147 states have (on average 2.142857142857143) internal successors, (315), 146 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 329 [2022-01-31 17:24:27,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:24:27,870 INFO L225 Difference]: With dead ends: 378 [2022-01-31 17:24:27,870 INFO L226 Difference]: Without dead ends: 337 [2022-01-31 17:24:27,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 289 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10439 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=31755, Invalid=52635, Unknown=0, NotChecked=0, Total=84390 [2022-01-31 17:24:27,872 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 321 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:24:27,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 84 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:24:27,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2022-01-31 17:24:27,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 336. [2022-01-31 17:24:27,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 330 states have (on average 1.0212121212121212) internal successors, (337), 330 states have internal predecessors, (337), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:24:27,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 342 transitions. [2022-01-31 17:24:27,996 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 342 transitions. Word has length 329 [2022-01-31 17:24:28,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:24:28,008 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 342 transitions. [2022-01-31 17:24:28,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 147 states, 147 states have (on average 2.142857142857143) internal successors, (315), 146 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 17:24:28,008 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 342 transitions. [2022-01-31 17:24:28,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2022-01-31 17:24:28,009 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:24:28,009 INFO L514 BasicCegarLoop]: trace histogram [144, 144, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:24:28,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2022-01-31 17:24:28,009 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:24:28,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:24:28,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1993137521, now seen corresponding path program 144 times [2022-01-31 17:24:28,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:24:28,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [916987487] [2022-01-31 17:24:28,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:24:28,011 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:24:28,011 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:24:28,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:24:28,046 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:24:28,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:24:32,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:24:32,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:24:32,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:24:32,066 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:24:32,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [916987487] [2022-01-31 17:24:32,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [916987487] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:24:32,067 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:24:32,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [148] imperfect sequences [] total 148 [2022-01-31 17:24:32,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52717791] [2022-01-31 17:24:32,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:24:32,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 148 states [2022-01-31 17:24:32,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:24:32,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2022-01-31 17:24:32,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10733, Invalid=11023, Unknown=0, NotChecked=0, Total=21756 [2022-01-31 17:24:32,071 INFO L87 Difference]: Start difference. First operand 336 states and 342 transitions. Second operand has 148 states, 148 states have (on average 2.141891891891892) internal successors, (317), 147 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 17:24:37,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:24:37,561 INFO L93 Difference]: Finished difference Result 380 states and 392 transitions. [2022-01-31 17:24:37,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2022-01-31 17:24:37,562 INFO L78 Accepts]: Start accepts. Automaton has has 148 states, 148 states have (on average 2.141891891891892) internal successors, (317), 147 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 331 [2022-01-31 17:24:37,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:24:37,562 INFO L225 Difference]: With dead ends: 380 [2022-01-31 17:24:37,562 INFO L226 Difference]: Without dead ends: 339 [2022-01-31 17:24:37,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 291 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10584 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=32193, Invalid=53363, Unknown=0, NotChecked=0, Total=85556 [2022-01-31 17:24:37,567 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 323 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:24:37,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 74 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:24:37,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2022-01-31 17:24:37,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 338. [2022-01-31 17:24:37,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 332 states have (on average 1.0210843373493976) internal successors, (339), 332 states have internal predecessors, (339), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:24:37,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 344 transitions. [2022-01-31 17:24:37,722 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 344 transitions. Word has length 331 [2022-01-31 17:24:37,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:24:37,722 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 344 transitions. [2022-01-31 17:24:37,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 148 states, 148 states have (on average 2.141891891891892) internal successors, (317), 147 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 17:24:37,722 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 344 transitions. [2022-01-31 17:24:37,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2022-01-31 17:24:37,723 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:24:37,723 INFO L514 BasicCegarLoop]: trace histogram [145, 145, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:24:37,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2022-01-31 17:24:37,723 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:24:37,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:24:37,723 INFO L85 PathProgramCache]: Analyzing trace with hash 264166317, now seen corresponding path program 145 times [2022-01-31 17:24:37,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:24:37,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1033046252] [2022-01-31 17:24:37,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:24:37,726 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:24:37,726 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:24:37,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:24:37,759 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:24:37,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:24:42,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:24:42,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:24:42,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:24:42,565 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:24:42,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1033046252] [2022-01-31 17:24:42,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1033046252] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:24:42,565 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:24:42,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [149] imperfect sequences [] total 149 [2022-01-31 17:24:42,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700264000] [2022-01-31 17:24:42,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:24:42,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 149 states [2022-01-31 17:24:42,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:24:42,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2022-01-31 17:24:42,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10880, Invalid=11172, Unknown=0, NotChecked=0, Total=22052 [2022-01-31 17:24:42,570 INFO L87 Difference]: Start difference. First operand 338 states and 344 transitions. Second operand has 149 states, 149 states have (on average 2.140939597315436) internal successors, (319), 148 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 17:24:47,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:24:47,630 INFO L93 Difference]: Finished difference Result 382 states and 394 transitions. [2022-01-31 17:24:47,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2022-01-31 17:24:47,630 INFO L78 Accepts]: Start accepts. Automaton has has 149 states, 149 states have (on average 2.140939597315436) internal successors, (319), 148 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 333 [2022-01-31 17:24:47,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:24:47,631 INFO L225 Difference]: With dead ends: 382 [2022-01-31 17:24:47,631 INFO L226 Difference]: Without dead ends: 341 [2022-01-31 17:24:47,635 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 17:24:47,635 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 325 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:24:47,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 59 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:24:47,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2022-01-31 17:24:47,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 340. [2022-01-31 17:24:47,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 334 states have (on average 1.0209580838323353) internal successors, (341), 334 states have internal predecessors, (341), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:24:47,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 346 transitions. [2022-01-31 17:24:47,783 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 346 transitions. Word has length 333 [2022-01-31 17:24:47,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:24:47,784 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 346 transitions. [2022-01-31 17:24:47,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 149 states, 149 states have (on average 2.140939597315436) internal successors, (319), 148 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 17:24:47,784 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 346 transitions. [2022-01-31 17:24:47,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2022-01-31 17:24:47,784 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:24:47,785 INFO L514 BasicCegarLoop]: trace histogram [146, 146, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:24:47,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2022-01-31 17:24:47,785 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:24:47,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:24:47,785 INFO L85 PathProgramCache]: Analyzing trace with hash 574670155, now seen corresponding path program 146 times [2022-01-31 17:24:47,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:24:47,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1391984241] [2022-01-31 17:24:47,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:24:47,786 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:24:47,786 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:24:47,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:24:47,824 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:24:47,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:24:52,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:24:52,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:24:52,260 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 17:24:52,260 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:24:52,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1391984241] [2022-01-31 17:24:52,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1391984241] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:24:52,260 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:24:52,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [150] imperfect sequences [] total 150 [2022-01-31 17:24:52,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764652161] [2022-01-31 17:24:52,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:24:52,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 150 states [2022-01-31 17:24:52,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:24:52,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2022-01-31 17:24:52,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11028, Invalid=11322, Unknown=0, NotChecked=0, Total=22350 [2022-01-31 17:24:52,265 INFO L87 Difference]: Start difference. First operand 340 states and 346 transitions. Second operand has 150 states, 150 states have (on average 2.14) internal successors, (321), 149 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 17:24:58,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:24:58,670 INFO L93 Difference]: Finished difference Result 384 states and 396 transitions. [2022-01-31 17:24:58,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2022-01-31 17:24:58,671 INFO L78 Accepts]: Start accepts. Automaton has has 150 states, 150 states have (on average 2.14) internal successors, (321), 149 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 335 [2022-01-31 17:24:58,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:24:58,671 INFO L225 Difference]: With dead ends: 384 [2022-01-31 17:24:58,671 INFO L226 Difference]: Without dead ends: 343 [2022-01-31 17:24:58,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 295 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10877 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=33078, Invalid=54834, Unknown=0, NotChecked=0, Total=87912 [2022-01-31 17:24:58,676 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 327 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:24:58,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [328 Valid, 74 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:24:58,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2022-01-31 17:24:58,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 342. [2022-01-31 17:24:58,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 336 states have (on average 1.0208333333333333) internal successors, (343), 336 states have internal predecessors, (343), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:24:58,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 348 transitions. [2022-01-31 17:24:58,827 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 348 transitions. Word has length 335 [2022-01-31 17:24:58,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:24:58,827 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 348 transitions. [2022-01-31 17:24:58,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 150 states, 150 states have (on average 2.14) internal successors, (321), 149 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 17:24:58,827 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 348 transitions. [2022-01-31 17:24:58,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2022-01-31 17:24:58,828 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:24:58,828 INFO L514 BasicCegarLoop]: trace histogram [147, 147, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:24:58,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2022-01-31 17:24:58,828 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:24:58,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:24:58,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1678852247, now seen corresponding path program 147 times [2022-01-31 17:24:58,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:24:58,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [512188463] [2022-01-31 17:24:58,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:24:58,829 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:24:58,829 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:24:58,830 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:24:58,864 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:24:58,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:25:04,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:25:04,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:25:04,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:25:04,814 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:25:04,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [512188463] [2022-01-31 17:25:04,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [512188463] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:25:04,814 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:25:04,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [151] imperfect sequences [] total 151 [2022-01-31 17:25:04,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007714655] [2022-01-31 17:25:04,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:25:04,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 151 states [2022-01-31 17:25:04,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:25:04,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2022-01-31 17:25:04,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11177, Invalid=11473, Unknown=0, NotChecked=0, Total=22650 [2022-01-31 17:25:04,819 INFO L87 Difference]: Start difference. First operand 342 states and 348 transitions. Second operand has 151 states, 151 states have (on average 2.1390728476821192) internal successors, (323), 150 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 17:25:10,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:25:10,199 INFO L93 Difference]: Finished difference Result 386 states and 398 transitions. [2022-01-31 17:25:10,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2022-01-31 17:25:10,199 INFO L78 Accepts]: Start accepts. Automaton has has 151 states, 151 states have (on average 2.1390728476821192) internal successors, (323), 150 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 337 [2022-01-31 17:25:10,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:25:10,200 INFO L225 Difference]: With dead ends: 386 [2022-01-31 17:25:10,200 INFO L226 Difference]: Without dead ends: 345 [2022-01-31 17:25:10,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 297 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11025 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=33525, Invalid=55577, Unknown=0, NotChecked=0, Total=89102 [2022-01-31 17:25:10,203 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 329 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:25:10,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [330 Valid, 69 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:25:10,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-01-31 17:25:10,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 344. [2022-01-31 17:25:10,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 338 states have (on average 1.0207100591715976) internal successors, (345), 338 states have internal predecessors, (345), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:25:10,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 350 transitions. [2022-01-31 17:25:10,334 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 350 transitions. Word has length 337 [2022-01-31 17:25:10,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:25:10,334 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 350 transitions. [2022-01-31 17:25:10,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 151 states, 151 states have (on average 2.1390728476821192) internal successors, (323), 150 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 17:25:10,335 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 350 transitions. [2022-01-31 17:25:10,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2022-01-31 17:25:10,335 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:25:10,351 INFO L514 BasicCegarLoop]: trace histogram [148, 148, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:25:10,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2022-01-31 17:25:10,351 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:25:10,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:25:10,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1644603911, now seen corresponding path program 148 times [2022-01-31 17:25:10,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:25:10,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1959556831] [2022-01-31 17:25:10,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:25:10,353 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:25:10,353 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:25:10,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:25:10,387 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:25:10,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:25:14,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:25:14,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:25:14,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:25:14,722 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:25:14,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1959556831] [2022-01-31 17:25:14,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1959556831] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:25:14,722 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:25:14,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [152] imperfect sequences [] total 152 [2022-01-31 17:25:14,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918527123] [2022-01-31 17:25:14,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:25:14,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 152 states [2022-01-31 17:25:14,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:25:14,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2022-01-31 17:25:14,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11327, Invalid=11625, Unknown=0, NotChecked=0, Total=22952 [2022-01-31 17:25:14,725 INFO L87 Difference]: Start difference. First operand 344 states and 350 transitions. Second operand has 152 states, 152 states have (on average 2.138157894736842) internal successors, (325), 151 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 17:25:20,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:25:20,402 INFO L93 Difference]: Finished difference Result 388 states and 400 transitions. [2022-01-31 17:25:20,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2022-01-31 17:25:20,402 INFO L78 Accepts]: Start accepts. Automaton has has 152 states, 152 states have (on average 2.138157894736842) internal successors, (325), 151 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 339 [2022-01-31 17:25:20,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:25:20,403 INFO L225 Difference]: With dead ends: 388 [2022-01-31 17:25:20,403 INFO L226 Difference]: Without dead ends: 347 [2022-01-31 17:25:20,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 299 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11174 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=33975, Invalid=56325, Unknown=0, NotChecked=0, Total=90300 [2022-01-31 17:25:20,406 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 331 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:25:20,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [332 Valid, 69 Invalid, 650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:25:20,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-01-31 17:25:20,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 346. [2022-01-31 17:25:20,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 340 states have (on average 1.0205882352941176) internal successors, (347), 340 states have internal predecessors, (347), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:25:20,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 352 transitions. [2022-01-31 17:25:20,541 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 352 transitions. Word has length 339 [2022-01-31 17:25:20,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:25:20,541 INFO L470 AbstractCegarLoop]: Abstraction has 346 states and 352 transitions. [2022-01-31 17:25:20,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 152 states, 152 states have (on average 2.138157894736842) internal successors, (325), 151 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 17:25:20,542 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 352 transitions. [2022-01-31 17:25:20,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2022-01-31 17:25:20,542 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:25:20,543 INFO L514 BasicCegarLoop]: trace histogram [149, 149, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:25:20,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2022-01-31 17:25:20,543 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:25:20,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:25:20,543 INFO L85 PathProgramCache]: Analyzing trace with hash 30303525, now seen corresponding path program 149 times [2022-01-31 17:25:20,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:25:20,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1197524312] [2022-01-31 17:25:20,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:25:20,553 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:25:20,553 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:25:20,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:25:20,591 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:25:20,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:25:25,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:25:25,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:25:25,282 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 17:25:25,282 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:25:25,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1197524312] [2022-01-31 17:25:25,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1197524312] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:25:25,282 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:25:25,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [153] imperfect sequences [] total 153 [2022-01-31 17:25:25,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114941438] [2022-01-31 17:25:25,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:25:25,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 153 states [2022-01-31 17:25:25,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:25:25,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 153 interpolants. [2022-01-31 17:25:25,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11478, Invalid=11778, Unknown=0, NotChecked=0, Total=23256 [2022-01-31 17:25:25,285 INFO L87 Difference]: Start difference. First operand 346 states and 352 transitions. Second operand has 153 states, 153 states have (on average 2.1372549019607843) internal successors, (327), 152 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 17:25:31,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:25:31,677 INFO L93 Difference]: Finished difference Result 390 states and 402 transitions. [2022-01-31 17:25:31,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2022-01-31 17:25:31,678 INFO L78 Accepts]: Start accepts. Automaton has has 153 states, 153 states have (on average 2.1372549019607843) internal successors, (327), 152 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 341 [2022-01-31 17:25:31,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:25:31,678 INFO L225 Difference]: With dead ends: 390 [2022-01-31 17:25:31,678 INFO L226 Difference]: Without dead ends: 349 [2022-01-31 17:25:31,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 301 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11324 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=34428, Invalid=57078, Unknown=0, NotChecked=0, Total=91506 [2022-01-31 17:25:31,681 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 333 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:25:31,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 54 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:25:31,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-01-31 17:25:31,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 348. [2022-01-31 17:25:31,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 342 states have (on average 1.0204678362573099) internal successors, (349), 342 states have internal predecessors, (349), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:25:31,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 354 transitions. [2022-01-31 17:25:31,820 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 354 transitions. Word has length 341 [2022-01-31 17:25:31,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:25:31,820 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 354 transitions. [2022-01-31 17:25:31,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 153 states, 153 states have (on average 2.1372549019607843) internal successors, (327), 152 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 17:25:31,820 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 354 transitions. [2022-01-31 17:25:31,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2022-01-31 17:25:31,822 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:25:31,822 INFO L514 BasicCegarLoop]: trace histogram [150, 150, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:25:31,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2022-01-31 17:25:31,822 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:25:31,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:25:31,822 INFO L85 PathProgramCache]: Analyzing trace with hash -829173565, now seen corresponding path program 150 times [2022-01-31 17:25:31,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:25:31,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1419202437] [2022-01-31 17:25:31,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:25:31,823 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:25:31,823 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:25:31,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:25:31,867 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:25:31,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:25:36,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:25:36,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:25:36,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:25:36,470 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:25:36,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1419202437] [2022-01-31 17:25:36,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1419202437] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:25:36,470 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:25:36,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [154] imperfect sequences [] total 154 [2022-01-31 17:25:36,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752375205] [2022-01-31 17:25:36,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:25:36,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 154 states [2022-01-31 17:25:36,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:25:36,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2022-01-31 17:25:36,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11630, Invalid=11932, Unknown=0, NotChecked=0, Total=23562 [2022-01-31 17:25:36,475 INFO L87 Difference]: Start difference. First operand 348 states and 354 transitions. Second operand has 154 states, 154 states have (on average 2.1363636363636362) internal successors, (329), 153 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 17:25:42,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:25:42,129 INFO L93 Difference]: Finished difference Result 392 states and 404 transitions. [2022-01-31 17:25:42,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2022-01-31 17:25:42,130 INFO L78 Accepts]: Start accepts. Automaton has has 154 states, 154 states have (on average 2.1363636363636362) internal successors, (329), 153 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 343 [2022-01-31 17:25:42,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:25:42,130 INFO L225 Difference]: With dead ends: 392 [2022-01-31 17:25:42,131 INFO L226 Difference]: Without dead ends: 351 [2022-01-31 17:25:42,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 303 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11475 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=34884, Invalid=57836, Unknown=0, NotChecked=0, Total=92720 [2022-01-31 17:25:42,136 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 335 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:25:42,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [336 Valid, 69 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:25:42,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-01-31 17:25:42,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 350. [2022-01-31 17:25:42,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 344 states have (on average 1.0203488372093024) internal successors, (351), 344 states have internal predecessors, (351), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:25:42,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 356 transitions. [2022-01-31 17:25:42,299 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 356 transitions. Word has length 343 [2022-01-31 17:25:42,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:25:42,299 INFO L470 AbstractCegarLoop]: Abstraction has 350 states and 356 transitions. [2022-01-31 17:25:42,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 154 states, 154 states have (on average 2.1363636363636362) internal successors, (329), 153 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 17:25:42,299 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 356 transitions. [2022-01-31 17:25:42,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2022-01-31 17:25:42,300 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:25:42,300 INFO L514 BasicCegarLoop]: trace histogram [151, 151, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:25:42,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2022-01-31 17:25:42,300 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:25:42,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:25:42,300 INFO L85 PathProgramCache]: Analyzing trace with hash 2142031073, now seen corresponding path program 151 times [2022-01-31 17:25:42,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:25:42,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1031941889] [2022-01-31 17:25:42,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:25:42,302 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:25:42,302 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:25:42,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:25:42,345 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:25:42,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:25:47,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:25:47,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:25:47,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:25:47,472 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:25:47,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1031941889] [2022-01-31 17:25:47,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1031941889] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:25:47,472 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:25:47,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [155] imperfect sequences [] total 155 [2022-01-31 17:25:47,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133674682] [2022-01-31 17:25:47,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:25:47,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 155 states [2022-01-31 17:25:47,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:25:47,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 155 interpolants. [2022-01-31 17:25:47,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11783, Invalid=12087, Unknown=0, NotChecked=0, Total=23870 [2022-01-31 17:25:47,476 INFO L87 Difference]: Start difference. First operand 350 states and 356 transitions. Second operand has 155 states, 155 states have (on average 2.1354838709677417) internal successors, (331), 154 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 17:25:53,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:25:53,266 INFO L93 Difference]: Finished difference Result 394 states and 406 transitions. [2022-01-31 17:25:53,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2022-01-31 17:25:53,267 INFO L78 Accepts]: Start accepts. Automaton has has 155 states, 155 states have (on average 2.1354838709677417) internal successors, (331), 154 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 345 [2022-01-31 17:25:53,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:25:53,267 INFO L225 Difference]: With dead ends: 394 [2022-01-31 17:25:53,267 INFO L226 Difference]: Without dead ends: 353 [2022-01-31 17:25:53,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 305 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11627 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=35343, Invalid=58599, Unknown=0, NotChecked=0, Total=93942 [2022-01-31 17:25:53,272 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 337 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:25:53,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 64 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:25:53,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2022-01-31 17:25:53,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 352. [2022-01-31 17:25:53,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 346 states have (on average 1.0202312138728324) internal successors, (353), 346 states have internal predecessors, (353), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:25:53,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 358 transitions. [2022-01-31 17:25:53,440 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 358 transitions. Word has length 345 [2022-01-31 17:25:53,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:25:53,440 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 358 transitions. [2022-01-31 17:25:53,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 155 states, 155 states have (on average 2.1354838709677417) internal successors, (331), 154 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 17:25:53,441 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 358 transitions. [2022-01-31 17:25:53,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2022-01-31 17:25:53,441 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:25:53,442 INFO L514 BasicCegarLoop]: trace histogram [152, 152, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:25:53,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2022-01-31 17:25:53,442 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:25:53,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:25:53,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1316436351, now seen corresponding path program 152 times [2022-01-31 17:25:53,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:25:53,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1372995196] [2022-01-31 17:25:53,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:25:53,456 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:25:53,456 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:25:53,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:25:53,519 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:25:53,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:25:58,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:25:58,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:25:58,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:25:58,181 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:25:58,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1372995196] [2022-01-31 17:25:58,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1372995196] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:25:58,181 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:25:58,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [156] imperfect sequences [] total 156 [2022-01-31 17:25:58,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723726311] [2022-01-31 17:25:58,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:25:58,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 156 states [2022-01-31 17:25:58,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:25:58,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2022-01-31 17:25:58,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11937, Invalid=12243, Unknown=0, NotChecked=0, Total=24180 [2022-01-31 17:25:58,185 INFO L87 Difference]: Start difference. First operand 352 states and 358 transitions. Second operand has 156 states, 156 states have (on average 2.1346153846153846) internal successors, (333), 155 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 17:26:04,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:04,376 INFO L93 Difference]: Finished difference Result 396 states and 408 transitions. [2022-01-31 17:26:04,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2022-01-31 17:26:04,376 INFO L78 Accepts]: Start accepts. Automaton has has 156 states, 156 states have (on average 2.1346153846153846) internal successors, (333), 155 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 347 [2022-01-31 17:26:04,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:04,377 INFO L225 Difference]: With dead ends: 396 [2022-01-31 17:26:04,377 INFO L226 Difference]: Without dead ends: 355 [2022-01-31 17:26:04,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 307 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11780 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=35805, Invalid=59367, Unknown=0, NotChecked=0, Total=95172 [2022-01-31 17:26:04,380 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 339 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:04,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [340 Valid, 74 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:26:04,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2022-01-31 17:26:04,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 354. [2022-01-31 17:26:04,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 348 states have (on average 1.0201149425287357) internal successors, (355), 348 states have internal predecessors, (355), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:26:04,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 360 transitions. [2022-01-31 17:26:04,524 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 360 transitions. Word has length 347 [2022-01-31 17:26:04,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:04,524 INFO L470 AbstractCegarLoop]: Abstraction has 354 states and 360 transitions. [2022-01-31 17:26:04,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 156 states, 156 states have (on average 2.1346153846153846) internal successors, (333), 155 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 17:26:04,524 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 360 transitions. [2022-01-31 17:26:04,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2022-01-31 17:26:04,525 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:04,525 INFO L514 BasicCegarLoop]: trace histogram [153, 153, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:04,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2022-01-31 17:26:04,525 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:04,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:04,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1806109027, now seen corresponding path program 153 times [2022-01-31 17:26:04,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:04,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1214684458] [2022-01-31 17:26:04,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:04,526 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:04,527 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:04,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:04,570 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:04,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:09,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:09,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:09,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:09,389 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:09,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1214684458] [2022-01-31 17:26:09,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1214684458] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:09,389 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:09,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [157] imperfect sequences [] total 157 [2022-01-31 17:26:09,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116873001] [2022-01-31 17:26:09,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:09,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 157 states [2022-01-31 17:26:09,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:09,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 157 interpolants. [2022-01-31 17:26:09,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12092, Invalid=12400, Unknown=0, NotChecked=0, Total=24492 [2022-01-31 17:26:09,392 INFO L87 Difference]: Start difference. First operand 354 states and 360 transitions. Second operand has 157 states, 157 states have (on average 2.1337579617834397) internal successors, (335), 156 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 17:26:16,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:16,011 INFO L93 Difference]: Finished difference Result 398 states and 410 transitions. [2022-01-31 17:26:16,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2022-01-31 17:26:16,012 INFO L78 Accepts]: Start accepts. Automaton has has 157 states, 157 states have (on average 2.1337579617834397) internal successors, (335), 156 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 349 [2022-01-31 17:26:16,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:16,012 INFO L225 Difference]: With dead ends: 398 [2022-01-31 17:26:16,012 INFO L226 Difference]: Without dead ends: 357 [2022-01-31 17:26:16,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 309 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11934 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=36270, Invalid=60140, Unknown=0, NotChecked=0, Total=96410 [2022-01-31 17:26:16,016 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 341 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:16,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [342 Valid, 74 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:26:16,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2022-01-31 17:26:16,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 356. [2022-01-31 17:26:16,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 350 states have (on average 1.02) internal successors, (357), 350 states have internal predecessors, (357), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:26:16,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 362 transitions. [2022-01-31 17:26:16,161 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 362 transitions. Word has length 349 [2022-01-31 17:26:16,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:16,162 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 362 transitions. [2022-01-31 17:26:16,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 157 states, 157 states have (on average 2.1337579617834397) internal successors, (335), 156 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 17:26:16,162 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 362 transitions. [2022-01-31 17:26:16,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2022-01-31 17:26:16,163 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:16,163 INFO L514 BasicCegarLoop]: trace histogram [154, 154, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:16,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2022-01-31 17:26:16,163 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:16,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:16,163 INFO L85 PathProgramCache]: Analyzing trace with hash -390077381, now seen corresponding path program 154 times [2022-01-31 17:26:16,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:16,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [535726964] [2022-01-31 17:26:16,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:16,164 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:16,164 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:16,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:16,227 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:16,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:20,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:20,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:20,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:20,873 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:20,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [535726964] [2022-01-31 17:26:20,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [535726964] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:20,873 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:20,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [158] imperfect sequences [] total 158 [2022-01-31 17:26:20,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251848059] [2022-01-31 17:26:20,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:20,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 158 states [2022-01-31 17:26:20,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:20,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2022-01-31 17:26:20,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12248, Invalid=12558, Unknown=0, NotChecked=0, Total=24806 [2022-01-31 17:26:20,877 INFO L87 Difference]: Start difference. First operand 356 states and 362 transitions. Second operand has 158 states, 158 states have (on average 2.132911392405063) internal successors, (337), 157 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 17:26:26,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:26,822 INFO L93 Difference]: Finished difference Result 400 states and 412 transitions. [2022-01-31 17:26:26,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2022-01-31 17:26:26,822 INFO L78 Accepts]: Start accepts. Automaton has has 158 states, 158 states have (on average 2.132911392405063) internal successors, (337), 157 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 351 [2022-01-31 17:26:26,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:26,823 INFO L225 Difference]: With dead ends: 400 [2022-01-31 17:26:26,823 INFO L226 Difference]: Without dead ends: 359 [2022-01-31 17:26:26,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 311 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12089 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=36738, Invalid=60918, Unknown=0, NotChecked=0, Total=97656 [2022-01-31 17:26:26,826 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 343 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:26,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 54 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:26:26,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-01-31 17:26:26,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 358. [2022-01-31 17:26:26,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 352 states have (on average 1.0198863636363635) internal successors, (359), 352 states have internal predecessors, (359), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:26:26,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 364 transitions. [2022-01-31 17:26:26,973 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 364 transitions. Word has length 351 [2022-01-31 17:26:26,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:26,973 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 364 transitions. [2022-01-31 17:26:26,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 158 states, 158 states have (on average 2.132911392405063) internal successors, (337), 157 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 17:26:26,973 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 364 transitions. [2022-01-31 17:26:26,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2022-01-31 17:26:26,974 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:26,974 INFO L514 BasicCegarLoop]: trace histogram [155, 155, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:26,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2022-01-31 17:26:26,974 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:26,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:26,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1088298407, now seen corresponding path program 155 times [2022-01-31 17:26:26,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:26,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1654974718] [2022-01-31 17:26:26,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:26,976 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:26,976 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:26,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:27,020 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:27,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:33,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:33,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:33,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:33,058 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:33,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1654974718] [2022-01-31 17:26:33,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1654974718] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:33,058 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:33,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [159] imperfect sequences [] total 159 [2022-01-31 17:26:33,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283402223] [2022-01-31 17:26:33,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:33,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 159 states [2022-01-31 17:26:33,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:33,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 159 interpolants. [2022-01-31 17:26:33,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12405, Invalid=12717, Unknown=0, NotChecked=0, Total=25122 [2022-01-31 17:26:33,062 INFO L87 Difference]: Start difference. First operand 358 states and 364 transitions. Second operand has 159 states, 159 states have (on average 2.1320754716981134) internal successors, (339), 158 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 17:26:40,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:40,508 INFO L93 Difference]: Finished difference Result 402 states and 414 transitions. [2022-01-31 17:26:40,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2022-01-31 17:26:40,508 INFO L78 Accepts]: Start accepts. Automaton has has 159 states, 159 states have (on average 2.1320754716981134) internal successors, (339), 158 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 353 [2022-01-31 17:26:40,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:40,509 INFO L225 Difference]: With dead ends: 402 [2022-01-31 17:26:40,509 INFO L226 Difference]: Without dead ends: 361 [2022-01-31 17:26:40,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 313 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12245 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=37209, Invalid=61701, Unknown=0, NotChecked=0, Total=98910 [2022-01-31 17:26:40,514 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 345 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:40,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [346 Valid, 84 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:26:40,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2022-01-31 17:26:40,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 360. [2022-01-31 17:26:40,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 354 states have (on average 1.0197740112994351) internal successors, (361), 354 states have internal predecessors, (361), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:26:40,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 366 transitions. [2022-01-31 17:26:40,676 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 366 transitions. Word has length 353 [2022-01-31 17:26:40,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:40,676 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 366 transitions. [2022-01-31 17:26:40,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 159 states, 159 states have (on average 2.1320754716981134) internal successors, (339), 158 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 17:26:40,676 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 366 transitions. [2022-01-31 17:26:40,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2022-01-31 17:26:40,677 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:40,677 INFO L514 BasicCegarLoop]: trace histogram [156, 156, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:40,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2022-01-31 17:26:40,677 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:40,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:40,678 INFO L85 PathProgramCache]: Analyzing trace with hash -2063806217, now seen corresponding path program 156 times [2022-01-31 17:26:40,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:40,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1371894751] [2022-01-31 17:26:40,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:40,679 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:40,679 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:40,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:40,726 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:40,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:45,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:45,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:45,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:45,700 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:45,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1371894751] [2022-01-31 17:26:45,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1371894751] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:45,700 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:45,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [160] imperfect sequences [] total 160 [2022-01-31 17:26:45,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156680498] [2022-01-31 17:26:45,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:45,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 160 states [2022-01-31 17:26:45,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:45,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2022-01-31 17:26:45,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12563, Invalid=12877, Unknown=0, NotChecked=0, Total=25440 [2022-01-31 17:26:45,705 INFO L87 Difference]: Start difference. First operand 360 states and 366 transitions. Second operand has 160 states, 160 states have (on average 2.13125) internal successors, (341), 159 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 17:26:51,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:51,623 INFO L93 Difference]: Finished difference Result 404 states and 416 transitions. [2022-01-31 17:26:51,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2022-01-31 17:26:51,623 INFO L78 Accepts]: Start accepts. Automaton has has 160 states, 160 states have (on average 2.13125) internal successors, (341), 159 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 355 [2022-01-31 17:26:51,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:51,624 INFO L225 Difference]: With dead ends: 404 [2022-01-31 17:26:51,624 INFO L226 Difference]: Without dead ends: 363 [2022-01-31 17:26:51,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 315 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12402 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=37683, Invalid=62489, Unknown=0, NotChecked=0, Total=100172 [2022-01-31 17:26:51,627 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 347 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:51,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [348 Valid, 59 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:26:51,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2022-01-31 17:26:51,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 362. [2022-01-31 17:26:51,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 356 states have (on average 1.0196629213483146) internal successors, (363), 356 states have internal predecessors, (363), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:26:51,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 368 transitions. [2022-01-31 17:26:51,776 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 368 transitions. Word has length 355 [2022-01-31 17:26:51,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:51,776 INFO L470 AbstractCegarLoop]: Abstraction has 362 states and 368 transitions. [2022-01-31 17:26:51,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 160 states, 160 states have (on average 2.13125) internal successors, (341), 159 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 17:26:51,776 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 368 transitions. [2022-01-31 17:26:51,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2022-01-31 17:26:51,777 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:51,777 INFO L514 BasicCegarLoop]: trace histogram [157, 157, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:51,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2022-01-31 17:26:51,777 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:51,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:51,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1071026197, now seen corresponding path program 157 times [2022-01-31 17:26:51,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:51,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1966661022] [2022-01-31 17:26:51,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:51,779 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:51,779 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:51,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:51,829 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:51,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:56,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:56,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:56,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:56,740 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:56,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1966661022] [2022-01-31 17:26:56,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1966661022] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:56,740 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:56,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [161] imperfect sequences [] total 161 [2022-01-31 17:26:56,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603479137] [2022-01-31 17:26:56,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:56,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 161 states [2022-01-31 17:26:56,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:56,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 161 interpolants. [2022-01-31 17:26:56,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12722, Invalid=13038, Unknown=0, NotChecked=0, Total=25760 [2022-01-31 17:26:56,743 INFO L87 Difference]: Start difference. First operand 362 states and 368 transitions. Second operand has 161 states, 161 states have (on average 2.130434782608696) internal successors, (343), 160 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 17:27:03,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:27:03,755 INFO L93 Difference]: Finished difference Result 406 states and 418 transitions. [2022-01-31 17:27:03,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2022-01-31 17:27:03,755 INFO L78 Accepts]: Start accepts. Automaton has has 161 states, 161 states have (on average 2.130434782608696) internal successors, (343), 160 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 357 [2022-01-31 17:27:03,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:27:03,756 INFO L225 Difference]: With dead ends: 406 [2022-01-31 17:27:03,756 INFO L226 Difference]: Without dead ends: 365 [2022-01-31 17:27:03,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 317 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12560 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=38160, Invalid=63282, Unknown=0, NotChecked=0, Total=101442 [2022-01-31 17:27:03,761 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 349 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:27:03,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 74 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:27:03,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2022-01-31 17:27:03,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 364. [2022-01-31 17:27:03,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 358 states have (on average 1.0195530726256983) internal successors, (365), 358 states have internal predecessors, (365), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:27:03,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 370 transitions. [2022-01-31 17:27:03,929 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 370 transitions. Word has length 357 [2022-01-31 17:27:03,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:27:03,929 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 370 transitions. [2022-01-31 17:27:03,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 161 states, 161 states have (on average 2.130434782608696) internal successors, (343), 160 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 17:27:03,929 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 370 transitions. [2022-01-31 17:27:03,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-01-31 17:27:03,930 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:27:03,930 INFO L514 BasicCegarLoop]: trace histogram [158, 158, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:27:03,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2022-01-31 17:27:03,930 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:27:03,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:27:03,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1422065741, now seen corresponding path program 158 times [2022-01-31 17:27:03,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:27:03,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1353650200] [2022-01-31 17:27:03,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:27:03,932 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:27:03,932 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:27:03,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:27:03,977 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:27:04,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:27:08,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:27:08,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:27:08,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:27:08,919 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:27:08,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1353650200] [2022-01-31 17:27:08,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1353650200] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:27:08,919 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:27:08,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [162] imperfect sequences [] total 162 [2022-01-31 17:27:08,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123667414] [2022-01-31 17:27:08,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:27:08,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 162 states [2022-01-31 17:27:08,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:27:08,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2022-01-31 17:27:08,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12882, Invalid=13200, Unknown=0, NotChecked=0, Total=26082 [2022-01-31 17:27:08,924 INFO L87 Difference]: Start difference. First operand 364 states and 370 transitions. Second operand has 162 states, 162 states have (on average 2.1296296296296298) internal successors, (345), 161 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) [2022-01-31 17:27:15,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:27:15,675 INFO L93 Difference]: Finished difference Result 408 states and 420 transitions. [2022-01-31 17:27:15,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2022-01-31 17:27:15,675 INFO L78 Accepts]: Start accepts. Automaton has has 162 states, 162 states have (on average 2.1296296296296298) internal successors, (345), 161 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) Word has length 359 [2022-01-31 17:27:15,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:27:15,676 INFO L225 Difference]: With dead ends: 408 [2022-01-31 17:27:15,676 INFO L226 Difference]: Without dead ends: 367 [2022-01-31 17:27:15,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 319 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12719 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=38640, Invalid=64080, Unknown=0, NotChecked=0, Total=102720 [2022-01-31 17:27:15,680 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 351 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:27:15,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [352 Valid, 74 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:27:15,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2022-01-31 17:27:15,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 366. [2022-01-31 17:27:15,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 360 states have (on average 1.0194444444444444) internal successors, (367), 360 states have internal predecessors, (367), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:27:15,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 372 transitions. [2022-01-31 17:27:15,837 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 372 transitions. Word has length 359 [2022-01-31 17:27:15,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:27:15,837 INFO L470 AbstractCegarLoop]: Abstraction has 366 states and 372 transitions. [2022-01-31 17:27:15,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 162 states, 162 states have (on average 2.1296296296296298) internal successors, (345), 161 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) [2022-01-31 17:27:15,837 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 372 transitions. [2022-01-31 17:27:15,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2022-01-31 17:27:15,838 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:27:15,838 INFO L514 BasicCegarLoop]: trace histogram [159, 159, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:27:15,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2022-01-31 17:27:15,838 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:27:15,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:27:15,838 INFO L85 PathProgramCache]: Analyzing trace with hash -691666991, now seen corresponding path program 159 times [2022-01-31 17:27:15,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:27:15,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1013991812] [2022-01-31 17:27:15,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:27:15,840 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:27:15,840 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:27:15,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:27:15,887 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:27:16,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:27:21,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:27:21,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:27:21,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:27:21,173 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:27:21,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1013991812] [2022-01-31 17:27:21,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1013991812] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:27:21,174 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:27:21,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [163] imperfect sequences [] total 163 [2022-01-31 17:27:21,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640884598] [2022-01-31 17:27:21,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:27:21,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 163 states [2022-01-31 17:27:21,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:27:21,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 163 interpolants. [2022-01-31 17:27:21,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13043, Invalid=13363, Unknown=0, NotChecked=0, Total=26406 [2022-01-31 17:27:21,177 INFO L87 Difference]: Start difference. First operand 366 states and 372 transitions. Second operand has 163 states, 163 states have (on average 2.128834355828221) internal successors, (347), 162 states have internal predecessors, (347), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:27:27,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:27:27,753 INFO L93 Difference]: Finished difference Result 410 states and 422 transitions. [2022-01-31 17:27:27,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2022-01-31 17:27:27,754 INFO L78 Accepts]: Start accepts. Automaton has has 163 states, 163 states have (on average 2.128834355828221) internal successors, (347), 162 states have internal predecessors, (347), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 361 [2022-01-31 17:27:27,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:27:27,754 INFO L225 Difference]: With dead ends: 410 [2022-01-31 17:27:27,754 INFO L226 Difference]: Without dead ends: 369 [2022-01-31 17:27:27,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 321 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12879 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=39123, Invalid=64883, Unknown=0, NotChecked=0, Total=104006 [2022-01-31 17:27:27,758 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 353 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:27:27,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [354 Valid, 69 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:27:27,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2022-01-31 17:27:27,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 368. [2022-01-31 17:27:27,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 362 states have (on average 1.0193370165745856) internal successors, (369), 362 states have internal predecessors, (369), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:27:27,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 374 transitions. [2022-01-31 17:27:27,914 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 374 transitions. Word has length 361 [2022-01-31 17:27:27,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:27:27,914 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 374 transitions. [2022-01-31 17:27:27,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 163 states, 163 states have (on average 2.128834355828221) internal successors, (347), 162 states have internal predecessors, (347), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:27:27,914 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 374 transitions. [2022-01-31 17:27:27,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2022-01-31 17:27:27,915 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:27:27,915 INFO L514 BasicCegarLoop]: trace histogram [160, 160, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:27:27,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2022-01-31 17:27:27,915 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:27:27,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:27:27,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1141862511, now seen corresponding path program 160 times [2022-01-31 17:27:27,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:27:27,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [668860416] [2022-01-31 17:27:27,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:27:27,917 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:27:27,917 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:27:27,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:27:27,967 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:27:28,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:27:33,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:27:33,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:27:33,834 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 17:27:33,834 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:27:33,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [668860416] [2022-01-31 17:27:33,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [668860416] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:27:33,834 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:27:33,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [164] imperfect sequences [] total 164 [2022-01-31 17:27:33,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021189041] [2022-01-31 17:27:33,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:27:33,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 164 states [2022-01-31 17:27:33,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:27:33,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2022-01-31 17:27:33,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13205, Invalid=13527, Unknown=0, NotChecked=0, Total=26732 [2022-01-31 17:27:33,840 INFO L87 Difference]: Start difference. First operand 368 states and 374 transitions. Second operand has 164 states, 164 states have (on average 2.1280487804878048) internal successors, (349), 163 states have internal predecessors, (349), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:27:40,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:27:40,798 INFO L93 Difference]: Finished difference Result 412 states and 424 transitions. [2022-01-31 17:27:40,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2022-01-31 17:27:40,798 INFO L78 Accepts]: Start accepts. Automaton has has 164 states, 164 states have (on average 2.1280487804878048) internal successors, (349), 163 states have internal predecessors, (349), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 363 [2022-01-31 17:27:40,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:27:40,799 INFO L225 Difference]: With dead ends: 412 [2022-01-31 17:27:40,799 INFO L226 Difference]: Without dead ends: 371 [2022-01-31 17:27:40,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 323 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13040 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=39609, Invalid=65691, Unknown=0, NotChecked=0, Total=105300 [2022-01-31 17:27:40,805 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 355 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:27:40,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 79 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:27:40,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2022-01-31 17:27:41,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 370. [2022-01-31 17:27:41,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 364 states have (on average 1.0192307692307692) internal successors, (371), 364 states have internal predecessors, (371), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:27:41,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 376 transitions. [2022-01-31 17:27:41,005 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 376 transitions. Word has length 363 [2022-01-31 17:27:41,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:27:41,005 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 376 transitions. [2022-01-31 17:27:41,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 164 states, 164 states have (on average 2.1280487804878048) internal successors, (349), 163 states have internal predecessors, (349), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:27:41,006 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 376 transitions. [2022-01-31 17:27:41,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2022-01-31 17:27:41,007 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:27:41,007 INFO L514 BasicCegarLoop]: trace histogram [161, 161, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:27:41,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2022-01-31 17:27:41,007 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:27:41,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:27:41,007 INFO L85 PathProgramCache]: Analyzing trace with hash -2067844723, now seen corresponding path program 161 times [2022-01-31 17:27:41,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:27:41,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [677134106] [2022-01-31 17:27:41,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:27:41,008 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:27:41,008 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:27:41,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:27:41,065 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:27:41,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:27:46,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:27:46,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:27:46,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:27:46,914 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:27:46,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [677134106] [2022-01-31 17:27:46,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [677134106] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:27:46,914 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:27:46,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [165] imperfect sequences [] total 165 [2022-01-31 17:27:46,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007111874] [2022-01-31 17:27:46,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:27:46,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 165 states [2022-01-31 17:27:46,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:27:46,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 165 interpolants. [2022-01-31 17:27:46,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13368, Invalid=13692, Unknown=0, NotChecked=0, Total=27060 [2022-01-31 17:27:46,919 INFO L87 Difference]: Start difference. First operand 370 states and 376 transitions. Second operand has 165 states, 165 states have (on average 2.1272727272727274) internal successors, (351), 164 states have internal predecessors, (351), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:27:54,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:27:54,024 INFO L93 Difference]: Finished difference Result 414 states and 426 transitions. [2022-01-31 17:27:54,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 165 states. [2022-01-31 17:27:54,025 INFO L78 Accepts]: Start accepts. Automaton has has 165 states, 165 states have (on average 2.1272727272727274) internal successors, (351), 164 states have internal predecessors, (351), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 365 [2022-01-31 17:27:54,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:27:54,025 INFO L225 Difference]: With dead ends: 414 [2022-01-31 17:27:54,025 INFO L226 Difference]: Without dead ends: 373 [2022-01-31 17:27:54,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 325 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13202 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=40098, Invalid=66504, Unknown=0, NotChecked=0, Total=106602 [2022-01-31 17:27:54,030 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 357 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:27:54,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [358 Valid, 59 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:27:54,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2022-01-31 17:27:54,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 372. [2022-01-31 17:27:54,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 366 states have (on average 1.0191256830601092) internal successors, (373), 366 states have internal predecessors, (373), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:27:54,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 378 transitions. [2022-01-31 17:27:54,243 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 378 transitions. Word has length 365 [2022-01-31 17:27:54,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:27:54,243 INFO L470 AbstractCegarLoop]: Abstraction has 372 states and 378 transitions. [2022-01-31 17:27:54,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 165 states, 165 states have (on average 2.1272727272727274) internal successors, (351), 164 states have internal predecessors, (351), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:27:54,244 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 378 transitions. [2022-01-31 17:27:54,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2022-01-31 17:27:54,245 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:27:54,245 INFO L514 BasicCegarLoop]: trace histogram [162, 162, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:27:54,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2022-01-31 17:27:54,245 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:27:54,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:27:54,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1484989227, now seen corresponding path program 162 times [2022-01-31 17:27:54,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:27:54,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1142865554] [2022-01-31 17:27:54,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:27:54,246 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:27:54,246 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:27:54,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:27:54,293 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:27:54,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:27:59,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:27:59,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:27:59,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:27:59,665 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:27:59,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1142865554] [2022-01-31 17:27:59,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1142865554] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:27:59,665 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:27:59,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [166] imperfect sequences [] total 166 [2022-01-31 17:27:59,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704239633] [2022-01-31 17:27:59,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:27:59,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 166 states [2022-01-31 17:27:59,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:27:59,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 166 interpolants. [2022-01-31 17:27:59,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13532, Invalid=13858, Unknown=0, NotChecked=0, Total=27390 [2022-01-31 17:27:59,670 INFO L87 Difference]: Start difference. First operand 372 states and 378 transitions. Second operand has 166 states, 166 states have (on average 2.1265060240963853) internal successors, (353), 165 states have internal predecessors, (353), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:28:06,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:28:06,814 INFO L93 Difference]: Finished difference Result 416 states and 428 transitions. [2022-01-31 17:28:06,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2022-01-31 17:28:06,815 INFO L78 Accepts]: Start accepts. Automaton has has 166 states, 166 states have (on average 2.1265060240963853) internal successors, (353), 165 states have internal predecessors, (353), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 367 [2022-01-31 17:28:06,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:28:06,815 INFO L225 Difference]: With dead ends: 416 [2022-01-31 17:28:06,815 INFO L226 Difference]: Without dead ends: 375 [2022-01-31 17:28:06,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 327 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13365 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=40590, Invalid=67322, Unknown=0, NotChecked=0, Total=107912 [2022-01-31 17:28:06,821 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 359 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:28:06,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [360 Valid, 84 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:28:06,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2022-01-31 17:28:07,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 374. [2022-01-31 17:28:07,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 368 states have (on average 1.0190217391304348) internal successors, (375), 368 states have internal predecessors, (375), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:28:07,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 380 transitions. [2022-01-31 17:28:07,022 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 380 transitions. Word has length 367 [2022-01-31 17:28:07,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:28:07,023 INFO L470 AbstractCegarLoop]: Abstraction has 374 states and 380 transitions. [2022-01-31 17:28:07,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 166 states, 166 states have (on average 2.1265060240963853) internal successors, (353), 165 states have internal predecessors, (353), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:28:07,023 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 380 transitions. [2022-01-31 17:28:07,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2022-01-31 17:28:07,024 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:28:07,024 INFO L514 BasicCegarLoop]: trace histogram [163, 163, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:28:07,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2022-01-31 17:28:07,024 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:28:07,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:28:07,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1259414857, now seen corresponding path program 163 times [2022-01-31 17:28:07,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:28:07,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [305455443] [2022-01-31 17:28:07,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:28:07,025 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:28:07,025 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:28:07,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:28:07,073 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:28:07,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:28:12,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:28:12,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:28:12,646 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 17:28:12,646 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:28:12,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [305455443] [2022-01-31 17:28:12,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [305455443] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:28:12,646 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:28:12,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [167] imperfect sequences [] total 167 [2022-01-31 17:28:12,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973981821] [2022-01-31 17:28:12,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:28:12,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 167 states [2022-01-31 17:28:12,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:28:12,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 167 interpolants. [2022-01-31 17:28:12,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13697, Invalid=14025, Unknown=0, NotChecked=0, Total=27722 [2022-01-31 17:28:12,651 INFO L87 Difference]: Start difference. First operand 374 states and 380 transitions. Second operand has 167 states, 167 states have (on average 2.125748502994012) internal successors, (355), 166 states have internal predecessors, (355), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:28:20,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:28:20,077 INFO L93 Difference]: Finished difference Result 418 states and 430 transitions. [2022-01-31 17:28:20,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2022-01-31 17:28:20,078 INFO L78 Accepts]: Start accepts. Automaton has has 167 states, 167 states have (on average 2.125748502994012) internal successors, (355), 166 states have internal predecessors, (355), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 369 [2022-01-31 17:28:20,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:28:20,079 INFO L225 Difference]: With dead ends: 418 [2022-01-31 17:28:20,079 INFO L226 Difference]: Without dead ends: 377 [2022-01-31 17:28:20,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 329 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13529 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=41085, Invalid=68145, Unknown=0, NotChecked=0, Total=109230 [2022-01-31 17:28:20,082 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 361 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:28:20,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 74 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:28:20,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2022-01-31 17:28:20,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 376. [2022-01-31 17:28:20,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 370 states have (on average 1.018918918918919) internal successors, (377), 370 states have internal predecessors, (377), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:28:20,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 382 transitions. [2022-01-31 17:28:20,247 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 382 transitions. Word has length 369 [2022-01-31 17:28:20,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:28:20,247 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 382 transitions. [2022-01-31 17:28:20,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 167 states, 167 states have (on average 2.125748502994012) internal successors, (355), 166 states have internal predecessors, (355), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:28:20,248 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 382 transitions. [2022-01-31 17:28:20,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2022-01-31 17:28:20,248 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:28:20,249 INFO L514 BasicCegarLoop]: trace histogram [164, 164, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:28:20,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2022-01-31 17:28:20,249 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:28:20,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:28:20,249 INFO L85 PathProgramCache]: Analyzing trace with hash -769189913, now seen corresponding path program 164 times [2022-01-31 17:28:20,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:28:20,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1503617436] [2022-01-31 17:28:20,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:28:20,250 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:28:20,250 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:28:20,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:28:20,299 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:28:20,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:28:28,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:28:28,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:28:28,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:28:28,368 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:28:28,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1503617436] [2022-01-31 17:28:28,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1503617436] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:28:28,369 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:28:28,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [168] imperfect sequences [] total 168 [2022-01-31 17:28:28,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960398349] [2022-01-31 17:28:28,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:28:28,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 168 states [2022-01-31 17:28:28,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:28:28,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 168 interpolants. [2022-01-31 17:28:28,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13863, Invalid=14193, Unknown=0, NotChecked=0, Total=28056 [2022-01-31 17:28:28,372 INFO L87 Difference]: Start difference. First operand 376 states and 382 transitions. Second operand has 168 states, 168 states have (on average 2.125) internal successors, (357), 167 states have internal predecessors, (357), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:28:35,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:28:35,280 INFO L93 Difference]: Finished difference Result 420 states and 432 transitions. [2022-01-31 17:28:35,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2022-01-31 17:28:35,281 INFO L78 Accepts]: Start accepts. Automaton has has 168 states, 168 states have (on average 2.125) internal successors, (357), 167 states have internal predecessors, (357), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 371 [2022-01-31 17:28:35,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:28:35,281 INFO L225 Difference]: With dead ends: 420 [2022-01-31 17:28:35,281 INFO L226 Difference]: Without dead ends: 379 [2022-01-31 17:28:35,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 331 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13694 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=41583, Invalid=68973, Unknown=0, NotChecked=0, Total=110556 [2022-01-31 17:28:35,286 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 363 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:28:35,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 49 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:28:35,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2022-01-31 17:28:35,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 378. [2022-01-31 17:28:35,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 372 states have (on average 1.0188172043010753) internal successors, (379), 372 states have internal predecessors, (379), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:28:35,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 384 transitions. [2022-01-31 17:28:35,479 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 384 transitions. Word has length 371 [2022-01-31 17:28:35,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:28:35,479 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 384 transitions. [2022-01-31 17:28:35,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 168 states, 168 states have (on average 2.125) internal successors, (357), 167 states have internal predecessors, (357), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:28:35,479 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 384 transitions. [2022-01-31 17:28:35,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2022-01-31 17:28:35,480 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:28:35,480 INFO L514 BasicCegarLoop]: trace histogram [165, 165, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:28:35,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2022-01-31 17:28:35,480 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:28:35,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:28:35,481 INFO L85 PathProgramCache]: Analyzing trace with hash -343221499, now seen corresponding path program 165 times [2022-01-31 17:28:35,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:28:35,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [847190413] [2022-01-31 17:28:35,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:28:35,482 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:28:35,482 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:28:35,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:28:35,530 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:28:35,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:28:40,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:28:40,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:28:40,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:28:40,916 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:28:40,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [847190413] [2022-01-31 17:28:40,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [847190413] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:28:40,916 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:28:40,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [169] imperfect sequences [] total 169 [2022-01-31 17:28:40,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083880313] [2022-01-31 17:28:40,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:28:40,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 169 states [2022-01-31 17:28:40,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:28:40,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 169 interpolants. [2022-01-31 17:28:40,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14030, Invalid=14362, Unknown=0, NotChecked=0, Total=28392 [2022-01-31 17:28:40,921 INFO L87 Difference]: Start difference. First operand 378 states and 384 transitions. Second operand has 169 states, 169 states have (on average 2.1242603550295858) internal successors, (359), 168 states have internal predecessors, (359), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:28:48,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:28:48,227 INFO L93 Difference]: Finished difference Result 422 states and 434 transitions. [2022-01-31 17:28:48,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2022-01-31 17:28:48,227 INFO L78 Accepts]: Start accepts. Automaton has has 169 states, 169 states have (on average 2.1242603550295858) internal successors, (359), 168 states have internal predecessors, (359), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 373 [2022-01-31 17:28:48,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:28:48,228 INFO L225 Difference]: With dead ends: 422 [2022-01-31 17:28:48,228 INFO L226 Difference]: Without dead ends: 381 [2022-01-31 17:28:48,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 333 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13860 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=42084, Invalid=69806, Unknown=0, NotChecked=0, Total=111890 [2022-01-31 17:28:48,232 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 365 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:28:48,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [366 Valid, 79 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:28:48,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2022-01-31 17:28:48,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 380. [2022-01-31 17:28:48,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 374 states have (on average 1.018716577540107) internal successors, (381), 374 states have internal predecessors, (381), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:28:48,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 386 transitions. [2022-01-31 17:28:48,415 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 386 transitions. Word has length 373 [2022-01-31 17:28:48,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:28:48,415 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 386 transitions. [2022-01-31 17:28:48,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 169 states, 169 states have (on average 2.1242603550295858) internal successors, (359), 168 states have internal predecessors, (359), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:28:48,415 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 386 transitions. [2022-01-31 17:28:48,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2022-01-31 17:28:48,416 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:28:48,416 INFO L514 BasicCegarLoop]: trace histogram [166, 166, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:28:48,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2022-01-31 17:28:48,416 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:28:48,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:28:48,416 INFO L85 PathProgramCache]: Analyzing trace with hash 990531235, now seen corresponding path program 166 times [2022-01-31 17:28:48,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:28:48,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [845902885] [2022-01-31 17:28:48,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:28:48,418 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:28:48,418 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:28:48,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:28:48,466 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:28:48,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:28:55,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:28:55,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:28:55,526 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 17:28:55,526 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:28:55,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [845902885] [2022-01-31 17:28:55,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [845902885] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:28:55,526 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:28:55,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [170] imperfect sequences [] total 170 [2022-01-31 17:28:55,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96236769] [2022-01-31 17:28:55,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:28:55,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 170 states [2022-01-31 17:28:55,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:28:55,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 170 interpolants. [2022-01-31 17:28:55,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14198, Invalid=14532, Unknown=0, NotChecked=0, Total=28730 [2022-01-31 17:28:55,531 INFO L87 Difference]: Start difference. First operand 380 states and 386 transitions. Second operand has 170 states, 170 states have (on average 2.123529411764706) internal successors, (361), 169 states have internal predecessors, (361), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:29:03,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:29:03,075 INFO L93 Difference]: Finished difference Result 424 states and 436 transitions. [2022-01-31 17:29:03,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 170 states. [2022-01-31 17:29:03,075 INFO L78 Accepts]: Start accepts. Automaton has has 170 states, 170 states have (on average 2.123529411764706) internal successors, (361), 169 states have internal predecessors, (361), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 375 [2022-01-31 17:29:03,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:29:03,076 INFO L225 Difference]: With dead ends: 424 [2022-01-31 17:29:03,076 INFO L226 Difference]: Without dead ends: 383 [2022-01-31 17:29:03,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 335 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14027 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=42588, Invalid=70644, Unknown=0, NotChecked=0, Total=113232 [2022-01-31 17:29:03,081 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 367 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:29:03,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [368 Valid, 79 Invalid, 771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:29:03,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2022-01-31 17:29:03,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 382. [2022-01-31 17:29:03,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 376 states have (on average 1.0186170212765957) internal successors, (383), 376 states have internal predecessors, (383), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:29:03,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 388 transitions. [2022-01-31 17:29:03,305 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 388 transitions. Word has length 375 [2022-01-31 17:29:03,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:29:03,305 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 388 transitions. [2022-01-31 17:29:03,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 170 states, 170 states have (on average 2.123529411764706) internal successors, (361), 169 states have internal predecessors, (361), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:29:03,305 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 388 transitions. [2022-01-31 17:29:03,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2022-01-31 17:29:03,306 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:29:03,306 INFO L514 BasicCegarLoop]: trace histogram [167, 167, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:29:03,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2022-01-31 17:29:03,306 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:29:03,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:29:03,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1468312895, now seen corresponding path program 167 times [2022-01-31 17:29:03,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:29:03,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [710220679] [2022-01-31 17:29:03,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:29:03,309 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:29:03,309 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:29:03,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:29:03,367 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:29:03,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:29:08,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:29:08,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:29:08,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:29:08,790 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:29:08,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [710220679] [2022-01-31 17:29:08,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [710220679] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:29:08,790 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:29:08,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [171] imperfect sequences [] total 171 [2022-01-31 17:29:08,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519994465] [2022-01-31 17:29:08,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:29:08,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 171 states [2022-01-31 17:29:08,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:29:08,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 171 interpolants. [2022-01-31 17:29:08,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14367, Invalid=14703, Unknown=0, NotChecked=0, Total=29070 [2022-01-31 17:29:08,797 INFO L87 Difference]: Start difference. First operand 382 states and 388 transitions. Second operand has 171 states, 171 states have (on average 2.1228070175438596) internal successors, (363), 170 states have internal predecessors, (363), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:29:16,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:29:16,513 INFO L93 Difference]: Finished difference Result 426 states and 438 transitions. [2022-01-31 17:29:16,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2022-01-31 17:29:16,513 INFO L78 Accepts]: Start accepts. Automaton has has 171 states, 171 states have (on average 2.1228070175438596) internal successors, (363), 170 states have internal predecessors, (363), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 377 [2022-01-31 17:29:16,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:29:16,514 INFO L225 Difference]: With dead ends: 426 [2022-01-31 17:29:16,514 INFO L226 Difference]: Without dead ends: 385 [2022-01-31 17:29:16,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 337 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14195 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=43095, Invalid=71487, Unknown=0, NotChecked=0, Total=114582 [2022-01-31 17:29:16,520 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 369 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:29:16,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [370 Valid, 69 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:29:16,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2022-01-31 17:29:16,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 384. [2022-01-31 17:29:16,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 378 states have (on average 1.0185185185185186) internal successors, (385), 378 states have internal predecessors, (385), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:29:16,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 390 transitions. [2022-01-31 17:29:16,712 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 390 transitions. Word has length 377 [2022-01-31 17:29:16,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:29:16,713 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 390 transitions. [2022-01-31 17:29:16,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 171 states, 171 states have (on average 2.1228070175438596) internal successors, (363), 170 states have internal predecessors, (363), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:29:16,713 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 390 transitions. [2022-01-31 17:29:16,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2022-01-31 17:29:16,714 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:29:16,714 INFO L514 BasicCegarLoop]: trace histogram [168, 168, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:29:16,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2022-01-31 17:29:16,714 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:29:16,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:29:16,714 INFO L85 PathProgramCache]: Analyzing trace with hash 2109458271, now seen corresponding path program 168 times [2022-01-31 17:29:16,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:29:16,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1010397944] [2022-01-31 17:29:16,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:29:16,715 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:29:16,715 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:29:16,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:29:16,770 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:29:16,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:29:23,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:29:23,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:29:23,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:29:23,049 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:29:23,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1010397944] [2022-01-31 17:29:23,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1010397944] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:29:23,050 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:29:23,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [172] imperfect sequences [] total 172 [2022-01-31 17:29:23,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701947746] [2022-01-31 17:29:23,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:29:23,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 172 states [2022-01-31 17:29:23,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:29:23,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 172 interpolants. [2022-01-31 17:29:23,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14537, Invalid=14875, Unknown=0, NotChecked=0, Total=29412 [2022-01-31 17:29:23,055 INFO L87 Difference]: Start difference. First operand 384 states and 390 transitions. Second operand has 172 states, 172 states have (on average 2.122093023255814) internal successors, (365), 171 states have internal predecessors, (365), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:29:30,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:29:30,748 INFO L93 Difference]: Finished difference Result 428 states and 440 transitions. [2022-01-31 17:29:30,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2022-01-31 17:29:30,748 INFO L78 Accepts]: Start accepts. Automaton has has 172 states, 172 states have (on average 2.122093023255814) internal successors, (365), 171 states have internal predecessors, (365), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 379 [2022-01-31 17:29:30,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:29:30,749 INFO L225 Difference]: With dead ends: 428 [2022-01-31 17:29:30,749 INFO L226 Difference]: Without dead ends: 387 [2022-01-31 17:29:30,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 339 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14364 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=43605, Invalid=72335, Unknown=0, NotChecked=0, Total=115940 [2022-01-31 17:29:30,752 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 371 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:29:30,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [372 Valid, 79 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:29:30,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-01-31 17:29:30,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 386. [2022-01-31 17:29:30,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 380 states have (on average 1.018421052631579) internal successors, (387), 380 states have internal predecessors, (387), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:29:30,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 392 transitions. [2022-01-31 17:29:30,944 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 392 transitions. Word has length 379 [2022-01-31 17:29:30,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:29:30,945 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 392 transitions. [2022-01-31 17:29:30,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 172 states, 172 states have (on average 2.122093023255814) internal successors, (365), 171 states have internal predecessors, (365), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:29:30,950 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 392 transitions. [2022-01-31 17:29:30,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 382 [2022-01-31 17:29:30,951 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:29:30,951 INFO L514 BasicCegarLoop]: trace histogram [169, 169, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:29:30,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2022-01-31 17:29:30,951 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:29:30,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:29:30,951 INFO L85 PathProgramCache]: Analyzing trace with hash 78744701, now seen corresponding path program 169 times [2022-01-31 17:29:30,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:29:30,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [573241075] [2022-01-31 17:29:30,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:29:30,953 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:29:30,953 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:29:30,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:29:31,011 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:29:31,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:29:38,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:29:38,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:29:38,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:29:38,297 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:29:38,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [573241075] [2022-01-31 17:29:38,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [573241075] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:29:38,297 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:29:38,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [173] imperfect sequences [] total 173 [2022-01-31 17:29:38,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833816307] [2022-01-31 17:29:38,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:29:38,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 173 states [2022-01-31 17:29:38,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:29:38,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 173 interpolants. [2022-01-31 17:29:38,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14708, Invalid=15048, Unknown=0, NotChecked=0, Total=29756 [2022-01-31 17:29:38,303 INFO L87 Difference]: Start difference. First operand 386 states and 392 transitions. Second operand has 173 states, 173 states have (on average 2.121387283236994) internal successors, (367), 172 states have internal predecessors, (367), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)