/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/loops/insertion_sort-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 20:34:40,406 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 20:34:40,408 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 20:34:40,447 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 20:34:40,466 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 20:34:40,472 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 20:34:40,473 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 20:34:40,473 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 20:34:40,474 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 20:34:40,477 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 20:34:40,478 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 20:34:40,479 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 20:34:40,480 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 20:34:40,483 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 20:34:40,484 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 20:34:40,485 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 20:34:40,487 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 20:34:40,493 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 20:34:40,494 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 20:34:40,495 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 20:34:40,495 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 20:34:40,503 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 20:34:40,503 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 20:34:40,504 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 20:34:40,504 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 20:34:40,504 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 20:34:40,504 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 20:34:40,505 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 20:34:40,505 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 20:34:40,505 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 20:34:40,505 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 20:34:40,505 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 20:34:40,505 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 20:34:40,505 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 20:34:40,506 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 20:34:40,506 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 20:34:40,506 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 20:34:40,506 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 20:34:40,506 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 20:34:40,506 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 20:34:40,506 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 20:34:40,507 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 20:34:40,507 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 20:34:40,507 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 20:34:40,507 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 20:34:40,676 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 20:34:40,702 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 20:34:40,704 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 20:34:40,704 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 20:34:40,707 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 20:34:40,708 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/insertion_sort-1.c [2022-01-31 20:34:40,767 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36326d837/26b48a266f5f433cb941c1e0c0643476/FLAGd71088847 [2022-01-31 20:34:41,104 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 20:34:41,105 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/insertion_sort-1.c [2022-01-31 20:34:41,109 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36326d837/26b48a266f5f433cb941c1e0c0643476/FLAGd71088847 [2022-01-31 20:34:41,119 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36326d837/26b48a266f5f433cb941c1e0c0643476 [2022-01-31 20:34:41,122 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 20:34:41,123 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 20:34:41,128 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 20:34:41,128 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 20:34:41,131 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 20:34:41,131 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:34:41" (1/1) ... [2022-01-31 20:34:41,132 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e09debd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:34:41, skipping insertion in model container [2022-01-31 20:34:41,132 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:34:41" (1/1) ... [2022-01-31 20:34:41,138 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 20:34:41,152 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 20:34:41,309 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/insertion_sort-1.c[328,341] [2022-01-31 20:34:41,342 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 20:34:41,349 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 20:34:41,359 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/insertion_sort-1.c[328,341] [2022-01-31 20:34:41,380 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 20:34:41,397 INFO L208 MainTranslator]: Completed translation [2022-01-31 20:34:41,397 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:34:41 WrapperNode [2022-01-31 20:34:41,398 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 20:34:41,399 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 20:34:41,399 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 20:34:41,399 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 20:34:41,408 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:34:41" (1/1) ... [2022-01-31 20:34:41,408 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:34:41" (1/1) ... [2022-01-31 20:34:41,420 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:34:41" (1/1) ... [2022-01-31 20:34:41,420 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:34:41" (1/1) ... [2022-01-31 20:34:41,433 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:34:41" (1/1) ... [2022-01-31 20:34:41,439 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:34:41" (1/1) ... [2022-01-31 20:34:41,443 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:34:41" (1/1) ... [2022-01-31 20:34:41,444 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 20:34:41,445 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 20:34:41,445 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 20:34:41,445 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 20:34:41,447 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:34:41" (1/1) ... [2022-01-31 20:34:41,453 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 20:34:41,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 20:34:41,476 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 20:34:41,497 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 20:34:41,514 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 20:34:41,515 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 20:34:41,515 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 20:34:41,515 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 20:34:41,515 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 20:34:41,515 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 20:34:41,516 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 20:34:41,516 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 20:34:41,516 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 20:34:41,516 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 20:34:41,516 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-01-31 20:34:41,516 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 20:34:41,517 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 20:34:41,517 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 20:34:41,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 20:34:41,518 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 20:34:41,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 20:34:41,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 20:34:41,518 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 20:34:41,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 20:34:41,593 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 20:34:41,595 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 20:34:41,745 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 20:34:41,754 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 20:34:41,754 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-01-31 20:34:41,755 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:34:41 BoogieIcfgContainer [2022-01-31 20:34:41,756 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 20:34:41,757 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 20:34:41,757 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 20:34:41,766 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 20:34:41,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 08:34:41" (1/3) ... [2022-01-31 20:34:41,767 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31bad670 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:34:41, skipping insertion in model container [2022-01-31 20:34:41,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:34:41" (2/3) ... [2022-01-31 20:34:41,768 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31bad670 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:34:41, skipping insertion in model container [2022-01-31 20:34:41,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:34:41" (3/3) ... [2022-01-31 20:34:41,769 INFO L111 eAbstractionObserver]: Analyzing ICFG insertion_sort-1.c [2022-01-31 20:34:41,773 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 20:34:41,773 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 20:34:41,833 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 20:34:41,838 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 20:34:41,838 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 20:34:41,849 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 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 20:34:41,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-31 20:34:41,855 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:34:41,855 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:34:41,856 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:34:41,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:34:41,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1898607287, now seen corresponding path program 1 times [2022-01-31 20:34:41,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:34:41,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1212582956] [2022-01-31 20:34:41,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:34:41,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:34:41,908 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:34:41,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:34:42,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:34:42,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:34:42,069 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 20:34:42,070 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:34:42,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1212582956] [2022-01-31 20:34:42,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1212582956] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:34:42,072 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:34:42,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 20:34:42,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223681805] [2022-01-31 20:34:42,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:34:42,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 20:34:42,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:34:42,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 20:34:42,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-31 20:34:42,100 INFO L87 Difference]: Start difference. First operand has 33 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 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 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:34:42,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:34:42,252 INFO L93 Difference]: Finished difference Result 67 states and 92 transitions. [2022-01-31 20:34:42,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 20:34:42,254 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-01-31 20:34:42,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:34:42,259 INFO L225 Difference]: With dead ends: 67 [2022-01-31 20:34:42,259 INFO L226 Difference]: Without dead ends: 30 [2022-01-31 20:34:42,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-31 20:34:42,266 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 42 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:34:42,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 47 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:34:42,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-01-31 20:34:42,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2022-01-31 20:34:42,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:34:42,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2022-01-31 20:34:42,296 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 15 [2022-01-31 20:34:42,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:34:42,296 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2022-01-31 20:34:42,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:34:42,297 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2022-01-31 20:34:42,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-31 20:34:42,298 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:34:42,298 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:34:42,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 20:34:42,299 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:34:42,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:34:42,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1409532089, now seen corresponding path program 1 times [2022-01-31 20:34:42,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:34:42,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1111410508] [2022-01-31 20:34:42,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:34:42,315 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:34:42,315 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:34:42,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:34:42,317 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:34:42,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:34:42,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:34:42,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:34:42,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:34:42,506 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:34:42,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1111410508] [2022-01-31 20:34:42,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1111410508] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:34:42,507 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:34:42,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 20:34:42,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681967939] [2022-01-31 20:34:42,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:34:42,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 20:34:42,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:34:42,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 20:34:42,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-01-31 20:34:42,509 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:34:42,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:34:42,733 INFO L93 Difference]: Finished difference Result 63 states and 78 transitions. [2022-01-31 20:34:42,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 20:34:42,735 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-01-31 20:34:42,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:34:42,737 INFO L225 Difference]: With dead ends: 63 [2022-01-31 20:34:42,738 INFO L226 Difference]: Without dead ends: 40 [2022-01-31 20:34:42,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-01-31 20:34:42,745 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 59 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:34:42,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 48 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:34:42,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-01-31 20:34:42,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2022-01-31 20:34:42,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:34:42,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2022-01-31 20:34:42,764 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 17 [2022-01-31 20:34:42,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:34:42,765 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2022-01-31 20:34:42,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:34:42,766 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2022-01-31 20:34:42,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-31 20:34:42,768 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:34:42,769 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:34:42,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 20:34:42,770 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:34:42,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:34:42,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1068097608, now seen corresponding path program 1 times [2022-01-31 20:34:42,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:34:42,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1736764351] [2022-01-31 20:34:42,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:34:42,774 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:34:42,774 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:34:42,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:34:42,775 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:34:42,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:34:43,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:34:43,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:34:43,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:34:43,396 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:34:43,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1736764351] [2022-01-31 20:34:43,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1736764351] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:34:43,397 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:34:43,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 20:34:43,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566250804] [2022-01-31 20:34:43,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:34:43,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 20:34:43,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:34:43,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 20:34:43,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-01-31 20:34:43,400 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 16 states, 15 states have (on average 1.4) internal successors, (21), 14 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 20:34:43,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:34:43,833 INFO L93 Difference]: Finished difference Result 83 states and 102 transitions. [2022-01-31 20:34:43,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 20:34:43,833 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.4) internal successors, (21), 14 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 20:34:43,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:34:43,836 INFO L225 Difference]: With dead ends: 83 [2022-01-31 20:34:43,836 INFO L226 Difference]: Without dead ends: 64 [2022-01-31 20:34:43,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=702, Unknown=0, NotChecked=0, Total=870 [2022-01-31 20:34:43,838 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 100 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:34:43,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 52 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 20:34:43,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-01-31 20:34:43,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 48. [2022-01-31 20:34:43,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 40 states have (on average 1.25) internal successors, (50), 41 states have internal predecessors, (50), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 20:34:43,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2022-01-31 20:34:43,853 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 25 [2022-01-31 20:34:43,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:34:43,853 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2022-01-31 20:34:43,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.4) internal successors, (21), 14 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 20:34:43,854 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2022-01-31 20:34:43,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-31 20:34:43,854 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:34:43,855 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:34:43,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 20:34:43,855 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:34:43,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:34:43,855 INFO L85 PathProgramCache]: Analyzing trace with hash -367033030, now seen corresponding path program 1 times [2022-01-31 20:34:43,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:34:43,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [179807534] [2022-01-31 20:34:43,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:34:43,858 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:34:43,859 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:34:43,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:34:43,860 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:34:43,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:34:43,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:34:43,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:34:43,913 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 20:34:43,914 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:34:43,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [179807534] [2022-01-31 20:34:43,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [179807534] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:34:43,914 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:34:43,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 20:34:43,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791632727] [2022-01-31 20:34:43,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:34:43,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 20:34:43,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:34:43,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 20:34:43,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-31 20:34:43,916 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:34:44,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:34:44,012 INFO L93 Difference]: Finished difference Result 92 states and 111 transitions. [2022-01-31 20:34:44,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 20:34:44,013 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-01-31 20:34:44,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:34:44,015 INFO L225 Difference]: With dead ends: 92 [2022-01-31 20:34:44,016 INFO L226 Difference]: Without dead ends: 57 [2022-01-31 20:34:44,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-01-31 20:34:44,024 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 59 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:34:44,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 37 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:34:44,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-01-31 20:34:44,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 50. [2022-01-31 20:34:44,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 43 states have internal predecessors, (52), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 20:34:44,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2022-01-31 20:34:44,045 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 25 [2022-01-31 20:34:44,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:34:44,046 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2022-01-31 20:34:44,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:34:44,046 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2022-01-31 20:34:44,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 20:34:44,047 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:34:44,048 INFO L514 BasicCegarLoop]: trace histogram [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, 1] [2022-01-31 20:34:44,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 20:34:44,048 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:34:44,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:34:44,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1586594931, now seen corresponding path program 1 times [2022-01-31 20:34:44,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:34:44,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [816855151] [2022-01-31 20:34:44,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:34:44,052 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:34:44,052 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:34:44,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:34:44,054 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:34:44,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:34:44,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:34:44,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:34:44,544 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 20:34:44,544 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:34:44,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [816855151] [2022-01-31 20:34:44,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [816855151] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:34:44,545 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:34:44,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 20:34:44,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840155135] [2022-01-31 20:34:44,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:34:44,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 20:34:44,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:34:44,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 20:34:44,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-01-31 20:34:44,546 INFO L87 Difference]: Start difference. First operand 50 states and 59 transitions. Second operand has 20 states, 19 states have (on average 1.368421052631579) internal successors, (26), 18 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:34:45,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:34:45,294 INFO L93 Difference]: Finished difference Result 126 states and 159 transitions. [2022-01-31 20:34:45,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 20:34:45,294 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.368421052631579) internal successors, (26), 18 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-01-31 20:34:45,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:34:45,295 INFO L225 Difference]: With dead ends: 126 [2022-01-31 20:34:45,296 INFO L226 Difference]: Without dead ends: 91 [2022-01-31 20:34:45,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=264, Invalid=1296, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 20:34:45,297 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 93 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:34:45,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 70 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:34:45,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-01-31 20:34:45,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 56. [2022-01-31 20:34:45,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 48 states have (on average 1.2291666666666667) internal successors, (59), 49 states have internal predecessors, (59), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 20:34:45,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2022-01-31 20:34:45,316 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 30 [2022-01-31 20:34:45,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:34:45,316 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2022-01-31 20:34:45,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.368421052631579) internal successors, (26), 18 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:34:45,317 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2022-01-31 20:34:45,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-31 20:34:45,317 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:34:45,317 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:34:45,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 20:34:45,318 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:34:45,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:34:45,318 INFO L85 PathProgramCache]: Analyzing trace with hash 932991851, now seen corresponding path program 2 times [2022-01-31 20:34:45,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:34:45,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2088989942] [2022-01-31 20:34:45,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:34:45,320 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:34:45,320 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:34:45,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:34:45,322 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:34:45,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:34:45,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:34:45,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:34:45,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:34:45,426 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:34:45,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2088989942] [2022-01-31 20:34:45,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2088989942] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:34:45,426 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:34:45,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 20:34:45,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329596642] [2022-01-31 20:34:45,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:34:45,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 20:34:45,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:34:45,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 20:34:45,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-01-31 20:34:45,428 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:34:45,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:34:45,639 INFO L93 Difference]: Finished difference Result 147 states and 177 transitions. [2022-01-31 20:34:45,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 20:34:45,639 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-01-31 20:34:45,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:34:45,640 INFO L225 Difference]: With dead ends: 147 [2022-01-31 20:34:45,641 INFO L226 Difference]: Without dead ends: 107 [2022-01-31 20:34:45,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-01-31 20:34:45,642 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 141 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:34:45,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 42 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:34:45,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-01-31 20:34:45,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 71. [2022-01-31 20:34:45,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 63 states have (on average 1.2063492063492063) internal successors, (76), 64 states have internal predecessors, (76), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 20:34:45,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 83 transitions. [2022-01-31 20:34:45,664 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 83 transitions. Word has length 31 [2022-01-31 20:34:45,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:34:45,664 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 83 transitions. [2022-01-31 20:34:45,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:34:45,664 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 83 transitions. [2022-01-31 20:34:45,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-31 20:34:45,671 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:34:45,671 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:34:45,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 20:34:45,671 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:34:45,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:34:45,672 INFO L85 PathProgramCache]: Analyzing trace with hash 912710034, now seen corresponding path program 1 times [2022-01-31 20:34:45,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:34:45,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1127277423] [2022-01-31 20:34:45,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:34:45,674 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:34:45,674 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:34:45,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:34:45,675 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:34:45,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:34:45,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:34:45,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:34:45,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-31 20:34:45,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:34:45,809 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 20:34:45,809 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:34:45,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1127277423] [2022-01-31 20:34:45,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1127277423] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:34:45,809 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:34:45,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 20:34:45,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274720016] [2022-01-31 20:34:45,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:34:45,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 20:34:45,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:34:45,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 20:34:45,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-01-31 20:34:45,811 INFO L87 Difference]: Start difference. First operand 71 states and 83 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:34:46,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:34:46,092 INFO L93 Difference]: Finished difference Result 116 states and 136 transitions. [2022-01-31 20:34:46,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 20:34:46,092 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2022-01-31 20:34:46,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:34:46,094 INFO L225 Difference]: With dead ends: 116 [2022-01-31 20:34:46,094 INFO L226 Difference]: Without dead ends: 87 [2022-01-31 20:34:46,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-01-31 20:34:46,095 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 106 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:34:46,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 64 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 20:34:46,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-01-31 20:34:46,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 66. [2022-01-31 20:34:46,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 58 states have (on average 1.1896551724137931) internal successors, (69), 59 states have internal predecessors, (69), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 20:34:46,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 76 transitions. [2022-01-31 20:34:46,120 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 76 transitions. Word has length 33 [2022-01-31 20:34:46,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:34:46,120 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 76 transitions. [2022-01-31 20:34:46,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:34:46,121 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 76 transitions. [2022-01-31 20:34:46,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-31 20:34:46,121 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:34:46,121 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:34:46,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 20:34:46,121 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:34:46,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:34:46,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1010087575, now seen corresponding path program 3 times [2022-01-31 20:34:46,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:34:46,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [564219445] [2022-01-31 20:34:46,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:34:46,139 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:34:46,139 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:34:46,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:34:46,141 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:34:46,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:34:46,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:34:46,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:34:46,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:34:46,607 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:34:46,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [564219445] [2022-01-31 20:34:46,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [564219445] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:34:46,607 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:34:46,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 20:34:46,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433111697] [2022-01-31 20:34:46,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:34:46,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 20:34:46,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:34:46,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 20:34:46,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-01-31 20:34:46,609 INFO L87 Difference]: Start difference. First operand 66 states and 76 transitions. Second operand has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:34:47,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:34:47,247 INFO L93 Difference]: Finished difference Result 174 states and 215 transitions. [2022-01-31 20:34:47,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 20:34:47,251 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-01-31 20:34:47,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:34:47,253 INFO L225 Difference]: With dead ends: 174 [2022-01-31 20:34:47,253 INFO L226 Difference]: Without dead ends: 134 [2022-01-31 20:34:47,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=243, Invalid=1089, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 20:34:47,254 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 161 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:34:47,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 63 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:34:47,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-01-31 20:34:47,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 74. [2022-01-31 20:34:47,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 66 states have (on average 1.2121212121212122) internal successors, (80), 67 states have internal predecessors, (80), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 20:34:47,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 87 transitions. [2022-01-31 20:34:47,278 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 87 transitions. Word has length 33 [2022-01-31 20:34:47,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:34:47,278 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 87 transitions. [2022-01-31 20:34:47,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:34:47,278 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 87 transitions. [2022-01-31 20:34:47,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-31 20:34:47,279 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:34:47,279 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:34:47,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 20:34:47,279 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:34:47,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:34:47,280 INFO L85 PathProgramCache]: Analyzing trace with hash 925785056, now seen corresponding path program 1 times [2022-01-31 20:34:47,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:34:47,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [250893604] [2022-01-31 20:34:47,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:34:47,282 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:34:47,282 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:34:47,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:34:47,283 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:34:47,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:34:47,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:34:47,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:34:47,561 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 20:34:47,561 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:34:47,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [250893604] [2022-01-31 20:34:47,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [250893604] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:34:47,561 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:34:47,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 20:34:47,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816676069] [2022-01-31 20:34:47,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:34:47,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 20:34:47,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:34:47,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 20:34:47,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-01-31 20:34:47,563 INFO L87 Difference]: Start difference. First operand 74 states and 87 transitions. Second operand has 17 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:34:48,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:34:48,546 INFO L93 Difference]: Finished difference Result 197 states and 245 transitions. [2022-01-31 20:34:48,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 20:34:48,547 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-01-31 20:34:48,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:34:48,548 INFO L225 Difference]: With dead ends: 197 [2022-01-31 20:34:48,548 INFO L226 Difference]: Without dead ends: 157 [2022-01-31 20:34:48,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=555, Invalid=1995, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 20:34:48,551 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 168 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:34:48,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 71 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:34:48,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-01-31 20:34:48,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 80. [2022-01-31 20:34:48,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 72 states have (on average 1.2361111111111112) internal successors, (89), 73 states have internal predecessors, (89), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 20:34:48,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 96 transitions. [2022-01-31 20:34:48,581 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 96 transitions. Word has length 38 [2022-01-31 20:34:48,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:34:48,582 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 96 transitions. [2022-01-31 20:34:48,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:34:48,582 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 96 transitions. [2022-01-31 20:34:48,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-31 20:34:48,583 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:34:48,584 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:34:48,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 20:34:48,584 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:34:48,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:34:48,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1626849634, now seen corresponding path program 2 times [2022-01-31 20:34:48,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:34:48,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2058615978] [2022-01-31 20:34:48,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:34:48,589 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:34:48,589 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:34:48,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:34:48,591 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:34:48,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:34:48,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:34:48,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:34:48,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:34:48,650 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:34:48,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2058615978] [2022-01-31 20:34:48,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2058615978] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:34:48,650 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:34:48,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 20:34:48,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249729004] [2022-01-31 20:34:48,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:34:48,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 20:34:48,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:34:48,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 20:34:48,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-01-31 20:34:48,652 INFO L87 Difference]: Start difference. First operand 80 states and 96 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:34:48,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:34:48,896 INFO L93 Difference]: Finished difference Result 165 states and 205 transitions. [2022-01-31 20:34:48,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 20:34:48,896 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-01-31 20:34:48,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:34:48,897 INFO L225 Difference]: With dead ends: 165 [2022-01-31 20:34:48,897 INFO L226 Difference]: Without dead ends: 119 [2022-01-31 20:34:48,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2022-01-31 20:34:48,898 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 126 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:34:48,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 48 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:34:48,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-01-31 20:34:48,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 88. [2022-01-31 20:34:48,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 80 states have (on average 1.2) internal successors, (96), 81 states have internal predecessors, (96), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 20:34:48,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 103 transitions. [2022-01-31 20:34:48,932 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 103 transitions. Word has length 38 [2022-01-31 20:34:48,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:34:48,932 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 103 transitions. [2022-01-31 20:34:48,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:34:48,932 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 103 transitions. [2022-01-31 20:34:48,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-31 20:34:48,933 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:34:48,933 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:34:48,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 20:34:48,933 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:34:48,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:34:48,934 INFO L85 PathProgramCache]: Analyzing trace with hash 909842600, now seen corresponding path program 3 times [2022-01-31 20:34:48,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:34:48,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1831648775] [2022-01-31 20:34:48,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:34:48,936 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:34:48,936 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:34:48,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:34:48,937 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:34:48,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:34:49,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:34:49,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:34:49,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:34:49,506 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:34:49,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1831648775] [2022-01-31 20:34:49,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1831648775] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:34:49,506 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:34:49,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 20:34:49,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949999347] [2022-01-31 20:34:49,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:34:49,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 20:34:49,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:34:49,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 20:34:49,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-01-31 20:34:49,508 INFO L87 Difference]: Start difference. First operand 88 states and 103 transitions. Second operand has 23 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:34:50,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:34:50,642 INFO L93 Difference]: Finished difference Result 245 states and 298 transitions. [2022-01-31 20:34:50,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 20:34:50,642 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-01-31 20:34:50,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:34:50,643 INFO L225 Difference]: With dead ends: 245 [2022-01-31 20:34:50,643 INFO L226 Difference]: Without dead ends: 193 [2022-01-31 20:34:50,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=326, Invalid=1930, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 20:34:50,645 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 173 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 996 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 1098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 20:34:50,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 94 Invalid, 1098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 996 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 20:34:50,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-01-31 20:34:50,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 125. [2022-01-31 20:34:50,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 117 states have (on average 1.2478632478632479) internal successors, (146), 118 states have internal predecessors, (146), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 20:34:50,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 153 transitions. [2022-01-31 20:34:50,687 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 153 transitions. Word has length 38 [2022-01-31 20:34:50,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:34:50,687 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 153 transitions. [2022-01-31 20:34:50,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:34:50,687 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 153 transitions. [2022-01-31 20:34:50,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-31 20:34:50,688 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:34:50,688 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:34:50,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 20:34:50,688 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:34:50,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:34:50,689 INFO L85 PathProgramCache]: Analyzing trace with hash -2114079652, now seen corresponding path program 4 times [2022-01-31 20:34:50,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:34:50,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [532564722] [2022-01-31 20:34:50,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:34:50,691 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:34:50,691 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:34:50,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:34:50,692 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:34:50,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:34:50,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:34:50,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:34:50,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:34:50,811 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:34:50,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [532564722] [2022-01-31 20:34:50,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [532564722] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:34:50,811 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:34:50,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 20:34:50,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437971795] [2022-01-31 20:34:50,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:34:50,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 20:34:50,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:34:50,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 20:34:50,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-01-31 20:34:50,812 INFO L87 Difference]: Start difference. First operand 125 states and 153 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 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 20:34:51,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:34:51,283 INFO L93 Difference]: Finished difference Result 328 states and 407 transitions. [2022-01-31 20:34:51,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 20:34:51,284 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 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 39 [2022-01-31 20:34:51,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:34:51,285 INFO L225 Difference]: With dead ends: 328 [2022-01-31 20:34:51,285 INFO L226 Difference]: Without dead ends: 239 [2022-01-31 20:34:51,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-01-31 20:34:51,286 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 180 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:34:51,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 78 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 20:34:51,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-01-31 20:34:51,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 159. [2022-01-31 20:34:51,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 151 states have (on average 1.2251655629139073) internal successors, (185), 152 states have internal predecessors, (185), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 20:34:51,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 192 transitions. [2022-01-31 20:34:51,345 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 192 transitions. Word has length 39 [2022-01-31 20:34:51,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:34:51,345 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 192 transitions. [2022-01-31 20:34:51,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 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 20:34:51,346 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 192 transitions. [2022-01-31 20:34:51,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-31 20:34:51,346 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:34:51,346 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2022-01-31 20:34:51,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-31 20:34:51,346 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:34:51,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:34:51,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1844691523, now seen corresponding path program 2 times [2022-01-31 20:34:51,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:34:51,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1324738315] [2022-01-31 20:34:51,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:34:51,349 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:34:51,349 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:34:51,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:34:51,350 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:34:51,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:34:51,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:34:51,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:34:51,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-01-31 20:34:51,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:34:51,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:34:51,559 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:34:51,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1324738315] [2022-01-31 20:34:51,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1324738315] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:34:51,559 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:34:51,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 20:34:51,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486055948] [2022-01-31 20:34:51,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:34:51,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 20:34:51,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:34:51,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 20:34:51,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-01-31 20:34:51,560 INFO L87 Difference]: Start difference. First operand 159 states and 192 transitions. Second operand has 15 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:34:52,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:34:52,170 INFO L93 Difference]: Finished difference Result 220 states and 266 transitions. [2022-01-31 20:34:52,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 20:34:52,170 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2022-01-31 20:34:52,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:34:52,171 INFO L225 Difference]: With dead ends: 220 [2022-01-31 20:34:52,171 INFO L226 Difference]: Without dead ends: 218 [2022-01-31 20:34:52,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=834, Unknown=0, NotChecked=0, Total=992 [2022-01-31 20:34:52,172 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 125 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:34:52,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 82 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:34:52,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-01-31 20:34:52,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 179. [2022-01-31 20:34:52,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 168 states have (on average 1.2142857142857142) internal successors, (204), 170 states have internal predecessors, (204), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 20:34:52,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 215 transitions. [2022-01-31 20:34:52,236 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 215 transitions. Word has length 41 [2022-01-31 20:34:52,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:34:52,236 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 215 transitions. [2022-01-31 20:34:52,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:34:52,237 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 215 transitions. [2022-01-31 20:34:52,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-31 20:34:52,238 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:34:52,238 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:34:52,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 20:34:52,238 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:34:52,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:34:52,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1706177446, now seen corresponding path program 5 times [2022-01-31 20:34:52,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:34:52,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1820776212] [2022-01-31 20:34:52,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:34:52,240 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:34:52,240 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:34:52,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:34:52,241 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:34:52,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:34:52,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:34:52,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:34:52,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:34:52,733 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:34:52,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1820776212] [2022-01-31 20:34:52,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1820776212] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:34:52,733 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:34:52,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 20:34:52,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617497290] [2022-01-31 20:34:52,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:34:52,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 20:34:52,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:34:52,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 20:34:52,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2022-01-31 20:34:52,734 INFO L87 Difference]: Start difference. First operand 179 states and 215 transitions. Second operand has 22 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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 20:34:53,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:34:53,463 INFO L93 Difference]: Finished difference Result 302 states and 363 transitions. [2022-01-31 20:34:53,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 20:34:53,463 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-01-31 20:34:53,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:34:53,465 INFO L225 Difference]: With dead ends: 302 [2022-01-31 20:34:53,465 INFO L226 Difference]: Without dead ends: 213 [2022-01-31 20:34:53,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=270, Invalid=1290, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 20:34:53,466 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 172 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:34:53,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 54 Invalid, 685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:34:53,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-01-31 20:34:53,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 161. [2022-01-31 20:34:53,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 148 states have (on average 1.1689189189189189) internal successors, (173), 151 states have internal predecessors, (173), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 20:34:53,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 186 transitions. [2022-01-31 20:34:53,517 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 186 transitions. Word has length 41 [2022-01-31 20:34:53,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:34:53,517 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 186 transitions. [2022-01-31 20:34:53,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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 20:34:53,517 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 186 transitions. [2022-01-31 20:34:53,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-31 20:34:53,518 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:34:53,518 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:34:53,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-31 20:34:53,518 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:34:53,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:34:53,518 INFO L85 PathProgramCache]: Analyzing trace with hash 364945739, now seen corresponding path program 4 times [2022-01-31 20:34:53,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:34:53,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1264795205] [2022-01-31 20:34:53,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:34:53,521 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:34:53,521 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:34:53,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:34:53,523 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:34:53,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:34:53,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:34:53,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:34:53,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:34:53,901 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:34:53,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1264795205] [2022-01-31 20:34:53,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1264795205] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:34:53,901 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:34:53,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 20:34:53,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727857186] [2022-01-31 20:34:53,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:34:53,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 20:34:53,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:34:53,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 20:34:53,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2022-01-31 20:34:53,902 INFO L87 Difference]: Start difference. First operand 161 states and 186 transitions. Second operand has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 20 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 20:34:54,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:34:54,951 INFO L93 Difference]: Finished difference Result 281 states and 332 transitions. [2022-01-31 20:34:54,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 20:34:54,952 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 20 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 43 [2022-01-31 20:34:54,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:34:54,953 INFO L225 Difference]: With dead ends: 281 [2022-01-31 20:34:54,953 INFO L226 Difference]: Without dead ends: 227 [2022-01-31 20:34:54,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 963 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=614, Invalid=2692, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 20:34:54,955 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 194 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:34:54,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 77 Invalid, 864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 718 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:34:54,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-01-31 20:34:55,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 168. [2022-01-31 20:34:55,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 155 states have (on average 1.1612903225806452) internal successors, (180), 158 states have internal predecessors, (180), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 20:34:55,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 193 transitions. [2022-01-31 20:34:55,018 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 193 transitions. Word has length 43 [2022-01-31 20:34:55,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:34:55,018 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 193 transitions. [2022-01-31 20:34:55,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 20 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 20:34:55,019 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 193 transitions. [2022-01-31 20:34:55,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-31 20:34:55,019 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:34:55,019 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2022-01-31 20:34:55,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-31 20:34:55,020 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:34:55,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:34:55,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1980469830, now seen corresponding path program 1 times [2022-01-31 20:34:55,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:34:55,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2064404068] [2022-01-31 20:34:55,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:34:55,022 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:34:55,022 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:34:55,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:34:55,023 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:34:55,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:34:55,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:34:55,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:34:55,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-31 20:34:55,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:34:55,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:34:55,222 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:34:55,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2064404068] [2022-01-31 20:34:55,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2064404068] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:34:55,222 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:34:55,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 20:34:55,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118368324] [2022-01-31 20:34:55,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:34:55,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 20:34:55,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:34:55,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 20:34:55,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2022-01-31 20:34:55,223 INFO L87 Difference]: Start difference. First operand 168 states and 193 transitions. Second operand has 17 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:34:55,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:34:55,900 INFO L93 Difference]: Finished difference Result 217 states and 252 transitions. [2022-01-31 20:34:55,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 20:34:55,900 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 46 [2022-01-31 20:34:55,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:34:55,902 INFO L225 Difference]: With dead ends: 217 [2022-01-31 20:34:55,902 INFO L226 Difference]: Without dead ends: 215 [2022-01-31 20:34:55,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=1031, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 20:34:55,903 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 110 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 891 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:34:55,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 101 Invalid, 943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 891 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:34:55,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-01-31 20:34:55,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 172. [2022-01-31 20:34:55,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 159 states have (on average 1.169811320754717) internal successors, (186), 162 states have internal predecessors, (186), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 20:34:55,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 199 transitions. [2022-01-31 20:34:55,965 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 199 transitions. Word has length 46 [2022-01-31 20:34:55,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:34:55,966 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 199 transitions. [2022-01-31 20:34:55,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:34:55,966 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 199 transitions. [2022-01-31 20:34:55,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-31 20:34:55,967 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:34:55,967 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:34:55,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-31 20:34:55,967 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:34:55,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:34:55,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1458084557, now seen corresponding path program 1 times [2022-01-31 20:34:55,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:34:55,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1708977231] [2022-01-31 20:34:55,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:34:55,969 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:34:55,969 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:34:55,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:34:55,970 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:34:55,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:34:56,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:34:56,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:34:56,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:34:56,479 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:34:56,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1708977231] [2022-01-31 20:34:56,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1708977231] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:34:56,479 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:34:56,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 20:34:56,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967050803] [2022-01-31 20:34:56,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:34:56,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 20:34:56,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:34:56,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 20:34:56,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-01-31 20:34:56,480 INFO L87 Difference]: Start difference. First operand 172 states and 199 transitions. Second operand has 21 states, 20 states have (on average 1.85) internal successors, (37), 19 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 20:34:57,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:34:57,100 INFO L93 Difference]: Finished difference Result 234 states and 272 transitions. [2022-01-31 20:34:57,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 20:34:57,100 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.85) internal successors, (37), 19 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 46 [2022-01-31 20:34:57,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:34:57,101 INFO L225 Difference]: With dead ends: 234 [2022-01-31 20:34:57,102 INFO L226 Difference]: Without dead ends: 232 [2022-01-31 20:34:57,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=232, Invalid=1100, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 20:34:57,103 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 135 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:34:57,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 66 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:34:57,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-01-31 20:34:57,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 178. [2022-01-31 20:34:57,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 165 states have (on average 1.1818181818181819) internal successors, (195), 168 states have internal predecessors, (195), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 20:34:57,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 208 transitions. [2022-01-31 20:34:57,166 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 208 transitions. Word has length 46 [2022-01-31 20:34:57,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:34:57,166 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 208 transitions. [2022-01-31 20:34:57,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.85) internal successors, (37), 19 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 20:34:57,166 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 208 transitions. [2022-01-31 20:34:57,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-31 20:34:57,167 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:34:57,167 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:34:57,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-31 20:34:57,167 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:34:57,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:34:57,167 INFO L85 PathProgramCache]: Analyzing trace with hash -253360043, now seen corresponding path program 2 times [2022-01-31 20:34:57,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:34:57,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1722061702] [2022-01-31 20:34:57,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:34:57,169 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:34:57,169 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:34:57,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:34:57,170 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:34:57,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:34:57,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:34:57,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:34:57,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:34:57,773 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:34:57,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1722061702] [2022-01-31 20:34:57,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1722061702] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:34:57,774 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:34:57,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 20:34:57,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483822823] [2022-01-31 20:34:57,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:34:57,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 20:34:57,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:34:57,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 20:34:57,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2022-01-31 20:34:57,775 INFO L87 Difference]: Start difference. First operand 178 states and 208 transitions. Second operand has 25 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:34:59,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:34:59,270 INFO L93 Difference]: Finished difference Result 271 states and 319 transitions. [2022-01-31 20:34:59,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 20:34:59,271 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-01-31 20:34:59,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:34:59,272 INFO L225 Difference]: With dead ends: 271 [2022-01-31 20:34:59,272 INFO L226 Difference]: Without dead ends: 269 [2022-01-31 20:34:59,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 6 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 918 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=623, Invalid=2799, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 20:34:59,273 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 273 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 1131 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 1327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 1131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:34:59,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 60 Invalid, 1327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 1131 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 20:34:59,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-01-31 20:34:59,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 184. [2022-01-31 20:34:59,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 171 states have (on average 1.1871345029239766) internal successors, (203), 174 states have internal predecessors, (203), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 20:34:59,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 216 transitions. [2022-01-31 20:34:59,334 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 216 transitions. Word has length 46 [2022-01-31 20:34:59,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:34:59,334 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 216 transitions. [2022-01-31 20:34:59,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:34:59,334 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 216 transitions. [2022-01-31 20:34:59,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-01-31 20:34:59,334 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:34:59,335 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:34:59,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-31 20:34:59,335 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:34:59,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:34:59,335 INFO L85 PathProgramCache]: Analyzing trace with hash -966082275, now seen corresponding path program 3 times [2022-01-31 20:34:59,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:34:59,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1013939013] [2022-01-31 20:34:59,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:34:59,337 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:34:59,337 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:34:59,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:34:59,338 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:34:59,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:34:59,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:34:59,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:34:59,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-01-31 20:34:59,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:34:59,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-01-31 20:34:59,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:34:59,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:34:59,456 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:34:59,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1013939013] [2022-01-31 20:34:59,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1013939013] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:34:59,456 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:34:59,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 20:34:59,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108378954] [2022-01-31 20:34:59,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:34:59,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 20:34:59,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:34:59,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 20:34:59,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-01-31 20:34:59,458 INFO L87 Difference]: Start difference. First operand 184 states and 216 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 20:34:59,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:34:59,865 INFO L93 Difference]: Finished difference Result 264 states and 312 transitions. [2022-01-31 20:34:59,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 20:34:59,865 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 49 [2022-01-31 20:34:59,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:34:59,869 INFO L225 Difference]: With dead ends: 264 [2022-01-31 20:34:59,869 INFO L226 Difference]: Without dead ends: 231 [2022-01-31 20:34:59,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2022-01-31 20:34:59,870 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 174 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:34:59,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 61 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 20:34:59,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-01-31 20:34:59,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 175. [2022-01-31 20:34:59,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 163 states have (on average 1.165644171779141) internal successors, (190), 166 states have internal predecessors, (190), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 20:34:59,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 202 transitions. [2022-01-31 20:34:59,956 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 202 transitions. Word has length 49 [2022-01-31 20:34:59,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:34:59,956 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 202 transitions. [2022-01-31 20:34:59,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 20:34:59,956 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 202 transitions. [2022-01-31 20:34:59,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-01-31 20:34:59,957 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:34:59,957 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:34:59,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-31 20:34:59,957 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:34:59,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:34:59,958 INFO L85 PathProgramCache]: Analyzing trace with hash -146750412, now seen corresponding path program 4 times [2022-01-31 20:34:59,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:34:59,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1771378164] [2022-01-31 20:34:59,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:34:59,961 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:34:59,961 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:34:59,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:34:59,962 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:34:59,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:00,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:35:00,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:00,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-01-31 20:35:00,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:00,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:35:00,230 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:35:00,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1771378164] [2022-01-31 20:35:00,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1771378164] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:35:00,230 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:35:00,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 20:35:00,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748726274] [2022-01-31 20:35:00,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:35:00,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 20:35:00,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:35:00,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 20:35:00,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2022-01-31 20:35:00,231 INFO L87 Difference]: Start difference. First operand 175 states and 202 transitions. Second operand has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:35:01,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:35:01,076 INFO L93 Difference]: Finished difference Result 223 states and 262 transitions. [2022-01-31 20:35:01,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 20:35:01,077 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 49 [2022-01-31 20:35:01,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:35:01,079 INFO L225 Difference]: With dead ends: 223 [2022-01-31 20:35:01,079 INFO L226 Difference]: Without dead ends: 221 [2022-01-31 20:35:01,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=179, Invalid=1081, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 20:35:01,081 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 121 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 904 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:35:01,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 98 Invalid, 972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 904 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:35:01,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-01-31 20:35:01,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 195. [2022-01-31 20:35:01,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 179 states have (on average 1.1620111731843576) internal successors, (208), 184 states have internal predecessors, (208), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-31 20:35:01,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 226 transitions. [2022-01-31 20:35:01,195 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 226 transitions. Word has length 49 [2022-01-31 20:35:01,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:35:01,195 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 226 transitions. [2022-01-31 20:35:01,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:35:01,195 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 226 transitions. [2022-01-31 20:35:01,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-31 20:35:01,196 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:35:01,196 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 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] [2022-01-31 20:35:01,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-31 20:35:01,196 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:35:01,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:35:01,197 INFO L85 PathProgramCache]: Analyzing trace with hash 554440741, now seen corresponding path program 1 times [2022-01-31 20:35:01,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:35:01,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [327274119] [2022-01-31 20:35:01,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:35:01,198 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:35:01,199 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:35:01,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:35:01,200 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:35:01,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:01,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:35:01,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:01,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 20:35:01,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:01,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:35:01,691 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:35:01,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [327274119] [2022-01-31 20:35:01,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [327274119] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:35:01,691 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:35:01,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 20:35:01,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500910073] [2022-01-31 20:35:01,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:35:01,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 20:35:01,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:35:01,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 20:35:01,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2022-01-31 20:35:01,693 INFO L87 Difference]: Start difference. First operand 195 states and 226 transitions. Second operand has 27 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:35:03,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:35:03,715 INFO L93 Difference]: Finished difference Result 305 states and 356 transitions. [2022-01-31 20:35:03,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-31 20:35:03,716 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 51 [2022-01-31 20:35:03,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:35:03,717 INFO L225 Difference]: With dead ends: 305 [2022-01-31 20:35:03,717 INFO L226 Difference]: Without dead ends: 277 [2022-01-31 20:35:03,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1717 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=731, Invalid=5275, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 20:35:03,719 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 157 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 1403 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 1610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 1403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 20:35:03,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 108 Invalid, 1610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 1403 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 20:35:03,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-01-31 20:35:03,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 227. [2022-01-31 20:35:03,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 210 states have (on average 1.1666666666666667) internal successors, (245), 216 states have internal predecessors, (245), 11 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (9), 4 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 20:35:03,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 265 transitions. [2022-01-31 20:35:03,815 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 265 transitions. Word has length 51 [2022-01-31 20:35:03,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:35:03,815 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 265 transitions. [2022-01-31 20:35:03,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:35:03,816 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 265 transitions. [2022-01-31 20:35:03,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-31 20:35:03,817 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:35:03,817 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:35:03,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-31 20:35:03,817 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:35:03,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:35:03,817 INFO L85 PathProgramCache]: Analyzing trace with hash 455716478, now seen corresponding path program 1 times [2022-01-31 20:35:03,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:35:03,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [536572168] [2022-01-31 20:35:03,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:35:03,819 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:35:03,819 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:35:03,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:35:03,820 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:35:03,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:03,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:35:03,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:03,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:35:03,863 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:35:03,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [536572168] [2022-01-31 20:35:03,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [536572168] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:35:03,863 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:35:03,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 20:35:03,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008383368] [2022-01-31 20:35:03,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:35:03,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 20:35:03,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:35:03,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 20:35:03,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-01-31 20:35:03,864 INFO L87 Difference]: Start difference. First operand 227 states and 265 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:35:04,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:35:04,089 INFO L93 Difference]: Finished difference Result 335 states and 397 transitions. [2022-01-31 20:35:04,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 20:35:04,089 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-01-31 20:35:04,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:35:04,091 INFO L225 Difference]: With dead ends: 335 [2022-01-31 20:35:04,091 INFO L226 Difference]: Without dead ends: 246 [2022-01-31 20:35:04,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-01-31 20:35:04,094 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 56 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:35:04,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 59 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:35:04,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-01-31 20:35:04,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 196. [2022-01-31 20:35:04,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 180 states have (on average 1.1333333333333333) internal successors, (204), 185 states have internal predecessors, (204), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-31 20:35:04,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 222 transitions. [2022-01-31 20:35:04,194 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 222 transitions. Word has length 51 [2022-01-31 20:35:04,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:35:04,194 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 222 transitions. [2022-01-31 20:35:04,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:35:04,194 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 222 transitions. [2022-01-31 20:35:04,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-31 20:35:04,199 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:35:04,199 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:35:04,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-31 20:35:04,199 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:35:04,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:35:04,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1181899854, now seen corresponding path program 1 times [2022-01-31 20:35:04,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:35:04,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [702793910] [2022-01-31 20:35:04,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:35:04,205 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:35:04,205 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:35:04,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:35:04,206 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:35:04,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:04,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:35:04,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:04,569 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 20:35:04,570 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:35:04,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [702793910] [2022-01-31 20:35:04,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [702793910] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:35:04,570 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:35:04,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 20:35:04,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816046604] [2022-01-31 20:35:04,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:35:04,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 20:35:04,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:35:04,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 20:35:04,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-01-31 20:35:04,571 INFO L87 Difference]: Start difference. First operand 196 states and 222 transitions. Second operand has 19 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:35:05,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:35:05,477 INFO L93 Difference]: Finished difference Result 259 states and 299 transitions. [2022-01-31 20:35:05,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 20:35:05,477 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-01-31 20:35:05,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:35:05,478 INFO L225 Difference]: With dead ends: 259 [2022-01-31 20:35:05,478 INFO L226 Difference]: Without dead ends: 257 [2022-01-31 20:35:05,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=366, Invalid=1986, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 20:35:05,479 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 142 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 831 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:35:05,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 80 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 831 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:35:05,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-01-31 20:35:05,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 225. [2022-01-31 20:35:05,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 209 states have (on average 1.1626794258373205) internal successors, (243), 214 states have internal predecessors, (243), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-31 20:35:05,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 261 transitions. [2022-01-31 20:35:05,579 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 261 transitions. Word has length 51 [2022-01-31 20:35:05,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:35:05,580 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 261 transitions. [2022-01-31 20:35:05,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:35:05,580 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 261 transitions. [2022-01-31 20:35:05,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-31 20:35:05,581 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:35:05,581 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:35:05,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-31 20:35:05,581 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:35:05,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:35:05,581 INFO L85 PathProgramCache]: Analyzing trace with hash -186725060, now seen corresponding path program 5 times [2022-01-31 20:35:05,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:35:05,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [732825242] [2022-01-31 20:35:05,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:35:05,583 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:35:05,583 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:35:05,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:35:05,584 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:35:05,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:06,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:35:06,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:06,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:35:06,193 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:35:06,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [732825242] [2022-01-31 20:35:06,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [732825242] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:35:06,194 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:35:06,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 20:35:06,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719303399] [2022-01-31 20:35:06,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:35:06,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 20:35:06,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:35:06,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 20:35:06,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-01-31 20:35:06,195 INFO L87 Difference]: Start difference. First operand 225 states and 261 transitions. Second operand has 25 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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 20:35:07,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:35:07,510 INFO L93 Difference]: Finished difference Result 360 states and 420 transitions. [2022-01-31 20:35:07,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 20:35:07,511 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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 51 [2022-01-31 20:35:07,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:35:07,512 INFO L225 Difference]: With dead ends: 360 [2022-01-31 20:35:07,512 INFO L226 Difference]: Without dead ends: 306 [2022-01-31 20:35:07,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=438, Invalid=2868, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 20:35:07,513 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 193 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 1245 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 1331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:35:07,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 91 Invalid, 1331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1245 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 20:35:07,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2022-01-31 20:35:07,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 223. [2022-01-31 20:35:07,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 209 states have (on average 1.167464114832536) internal successors, (244), 212 states have internal predecessors, (244), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 20:35:07,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 258 transitions. [2022-01-31 20:35:07,615 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 258 transitions. Word has length 51 [2022-01-31 20:35:07,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:35:07,615 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 258 transitions. [2022-01-31 20:35:07,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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 20:35:07,616 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 258 transitions. [2022-01-31 20:35:07,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-31 20:35:07,616 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:35:07,616 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:35:07,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-31 20:35:07,617 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:35:07,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:35:07,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1824744982, now seen corresponding path program 2 times [2022-01-31 20:35:07,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:35:07,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1816881891] [2022-01-31 20:35:07,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:35:07,619 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:35:07,619 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:35:07,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:35:07,623 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:35:07,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:08,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:35:08,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:08,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:35:08,164 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:35:08,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1816881891] [2022-01-31 20:35:08,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1816881891] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:35:08,165 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:35:08,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 20:35:08,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622033163] [2022-01-31 20:35:08,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:35:08,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 20:35:08,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:35:08,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 20:35:08,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2022-01-31 20:35:08,166 INFO L87 Difference]: Start difference. First operand 223 states and 258 transitions. Second operand has 26 states, 25 states have (on average 1.8) internal successors, (45), 24 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 20:35:09,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:35:09,342 INFO L93 Difference]: Finished difference Result 326 states and 384 transitions. [2022-01-31 20:35:09,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 20:35:09,342 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.8) internal successors, (45), 24 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 51 [2022-01-31 20:35:09,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:35:09,343 INFO L225 Difference]: With dead ends: 326 [2022-01-31 20:35:09,343 INFO L226 Difference]: Without dead ends: 282 [2022-01-31 20:35:09,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=527, Invalid=2553, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 20:35:09,345 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 136 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:35:09,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 73 Invalid, 920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 799 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 20:35:09,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-01-31 20:35:09,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 232. [2022-01-31 20:35:09,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 218 states have (on average 1.1743119266055047) internal successors, (256), 221 states have internal predecessors, (256), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 20:35:09,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 270 transitions. [2022-01-31 20:35:09,454 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 270 transitions. Word has length 51 [2022-01-31 20:35:09,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:35:09,454 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 270 transitions. [2022-01-31 20:35:09,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.8) internal successors, (45), 24 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 20:35:09,454 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 270 transitions. [2022-01-31 20:35:09,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-31 20:35:09,455 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:35:09,455 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:35:09,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-31 20:35:09,456 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:35:09,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:35:09,456 INFO L85 PathProgramCache]: Analyzing trace with hash 417331817, now seen corresponding path program 2 times [2022-01-31 20:35:09,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:35:09,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [260806093] [2022-01-31 20:35:09,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:35:09,457 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:35:09,458 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:35:09,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:35:09,459 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:35:09,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:09,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:35:09,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:09,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 20:35:09,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:09,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:35:09,514 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:35:09,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [260806093] [2022-01-31 20:35:09,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [260806093] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:35:09,514 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:35:09,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 20:35:09,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488438360] [2022-01-31 20:35:09,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:35:09,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 20:35:09,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:35:09,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 20:35:09,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-01-31 20:35:09,515 INFO L87 Difference]: Start difference. First operand 232 states and 270 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:35:09,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:35:09,778 INFO L93 Difference]: Finished difference Result 309 states and 367 transitions. [2022-01-31 20:35:09,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 20:35:09,778 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 54 [2022-01-31 20:35:09,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:35:09,779 INFO L225 Difference]: With dead ends: 309 [2022-01-31 20:35:09,779 INFO L226 Difference]: Without dead ends: 265 [2022-01-31 20:35:09,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-01-31 20:35:09,780 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 82 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:35:09,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 62 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:35:09,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-01-31 20:35:09,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 241. [2022-01-31 20:35:09,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 227 states have (on average 1.171806167400881) internal successors, (266), 230 states have internal predecessors, (266), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 20:35:09,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 280 transitions. [2022-01-31 20:35:09,923 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 280 transitions. Word has length 54 [2022-01-31 20:35:09,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:35:09,924 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 280 transitions. [2022-01-31 20:35:09,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:35:09,924 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 280 transitions. [2022-01-31 20:35:09,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-31 20:35:09,925 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:35:09,925 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:35:09,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-01-31 20:35:09,925 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:35:09,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:35:09,925 INFO L85 PathProgramCache]: Analyzing trace with hash 636186535, now seen corresponding path program 1 times [2022-01-31 20:35:09,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:35:09,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [254300960] [2022-01-31 20:35:09,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:35:09,927 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:35:09,927 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:35:09,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:35:09,928 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:35:09,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:10,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:35:10,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:10,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 20:35:10,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:10,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:35:10,154 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:35:10,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [254300960] [2022-01-31 20:35:10,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [254300960] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:35:10,154 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:35:10,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 20:35:10,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144170147] [2022-01-31 20:35:10,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:35:10,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 20:35:10,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:35:10,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 20:35:10,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2022-01-31 20:35:10,158 INFO L87 Difference]: Start difference. First operand 241 states and 280 transitions. Second operand has 19 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:35:11,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:35:11,189 INFO L93 Difference]: Finished difference Result 452 states and 542 transitions. [2022-01-31 20:35:11,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 20:35:11,189 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 54 [2022-01-31 20:35:11,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:35:11,190 INFO L225 Difference]: With dead ends: 452 [2022-01-31 20:35:11,191 INFO L226 Difference]: Without dead ends: 361 [2022-01-31 20:35:11,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=403, Invalid=2047, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 20:35:11,192 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 207 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 905 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 1064 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:35:11,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 84 Invalid, 1064 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 905 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:35:11,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2022-01-31 20:35:11,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 282. [2022-01-31 20:35:11,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 264 states have (on average 1.1742424242424243) internal successors, (310), 269 states have internal predecessors, (310), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (9), 5 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 20:35:11,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 330 transitions. [2022-01-31 20:35:11,318 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 330 transitions. Word has length 54 [2022-01-31 20:35:11,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:35:11,319 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 330 transitions. [2022-01-31 20:35:11,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:35:11,319 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 330 transitions. [2022-01-31 20:35:11,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-31 20:35:11,320 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:35:11,320 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:35:11,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-01-31 20:35:11,320 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:35:11,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:35:11,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1518785839, now seen corresponding path program 3 times [2022-01-31 20:35:11,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:35:11,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [167255985] [2022-01-31 20:35:11,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:35:11,322 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:35:11,322 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:35:11,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:35:11,323 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:35:11,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:11,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:35:11,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:11,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 20:35:11,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:11,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:35:11,756 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:35:11,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [167255985] [2022-01-31 20:35:11,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [167255985] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:35:11,757 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:35:11,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 20:35:11,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710193902] [2022-01-31 20:35:11,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:35:11,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 20:35:11,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:35:11,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 20:35:11,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2022-01-31 20:35:11,758 INFO L87 Difference]: Start difference. First operand 282 states and 330 transitions. Second operand has 24 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:35:12,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:35:12,959 INFO L93 Difference]: Finished difference Result 316 states and 370 transitions. [2022-01-31 20:35:12,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 20:35:12,960 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 54 [2022-01-31 20:35:12,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:35:12,961 INFO L225 Difference]: With dead ends: 316 [2022-01-31 20:35:12,961 INFO L226 Difference]: Without dead ends: 314 [2022-01-31 20:35:12,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=340, Invalid=2210, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 20:35:12,962 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 139 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 1304 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 1395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:35:12,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 111 Invalid, 1395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1304 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 20:35:12,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-01-31 20:35:13,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 288. [2022-01-31 20:35:13,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 269 states have (on average 1.174721189591078) internal successors, (316), 275 states have internal predecessors, (316), 12 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (10), 5 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 20:35:13,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 338 transitions. [2022-01-31 20:35:13,100 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 338 transitions. Word has length 54 [2022-01-31 20:35:13,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:35:13,100 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 338 transitions. [2022-01-31 20:35:13,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:35:13,100 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 338 transitions. [2022-01-31 20:35:13,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 20:35:13,101 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:35:13,101 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 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] [2022-01-31 20:35:13,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-01-31 20:35:13,101 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:35:13,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:35:13,102 INFO L85 PathProgramCache]: Analyzing trace with hash -676055644, now seen corresponding path program 2 times [2022-01-31 20:35:13,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:35:13,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [525120744] [2022-01-31 20:35:13,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:35:13,103 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:35:13,103 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:35:13,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:35:13,104 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:35:13,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:13,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:35:13,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:13,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 20:35:13,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:13,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:35:13,856 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:35:13,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [525120744] [2022-01-31 20:35:13,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [525120744] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:35:13,856 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:35:13,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 20:35:13,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841198326] [2022-01-31 20:35:13,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:35:13,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 20:35:13,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:35:13,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 20:35:13,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=868, Unknown=0, NotChecked=0, Total=992 [2022-01-31 20:35:13,857 INFO L87 Difference]: Start difference. First operand 288 states and 338 transitions. Second operand has 32 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:35:15,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:35:15,508 INFO L93 Difference]: Finished difference Result 327 states and 384 transitions. [2022-01-31 20:35:15,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 20:35:15,509 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 56 [2022-01-31 20:35:15,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:35:15,510 INFO L225 Difference]: With dead ends: 327 [2022-01-31 20:35:15,510 INFO L226 Difference]: Without dead ends: 281 [2022-01-31 20:35:15,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1328 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=577, Invalid=4115, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 20:35:15,512 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 145 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 1463 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 1598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 1463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 20:35:15,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 85 Invalid, 1598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 1463 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 20:35:15,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-01-31 20:35:15,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 235. [2022-01-31 20:35:15,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 219 states have (on average 1.2009132420091324) internal successors, (263), 224 states have internal predecessors, (263), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 4 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 20:35:15,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 282 transitions. [2022-01-31 20:35:15,639 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 282 transitions. Word has length 56 [2022-01-31 20:35:15,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:35:15,640 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 282 transitions. [2022-01-31 20:35:15,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:35:15,640 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 282 transitions. [2022-01-31 20:35:15,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-31 20:35:15,640 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:35:15,641 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:35:15,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-01-31 20:35:15,641 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:35:15,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:35:15,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1953283570, now seen corresponding path program 5 times [2022-01-31 20:35:15,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:35:15,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1094089412] [2022-01-31 20:35:15,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:35:15,643 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:35:15,643 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:35:15,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:35:15,644 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:35:15,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:15,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:35:15,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:15,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-01-31 20:35:15,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:15,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-01-31 20:35:15,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:15,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:35:15,974 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:35:15,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1094089412] [2022-01-31 20:35:15,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1094089412] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:35:15,974 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:35:15,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 20:35:15,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964878957] [2022-01-31 20:35:15,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:35:15,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 20:35:15,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:35:15,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 20:35:15,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-01-31 20:35:15,975 INFO L87 Difference]: Start difference. First operand 235 states and 282 transitions. Second operand has 19 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 20:35:16,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:35:16,705 INFO L93 Difference]: Finished difference Result 318 states and 382 transitions. [2022-01-31 20:35:16,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 20:35:16,705 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 57 [2022-01-31 20:35:16,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:35:16,706 INFO L225 Difference]: With dead ends: 318 [2022-01-31 20:35:16,706 INFO L226 Difference]: Without dead ends: 316 [2022-01-31 20:35:16,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 7 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=217, Invalid=1189, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 20:35:16,707 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 193 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 920 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:35:16,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 90 Invalid, 999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 920 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:35:16,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-01-31 20:35:16,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 267. [2022-01-31 20:35:16,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 244 states have (on average 1.1885245901639345) internal successors, (290), 251 states have internal predecessors, (290), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (15), 8 states have call predecessors, (15), 15 states have call successors, (15) [2022-01-31 20:35:16,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 321 transitions. [2022-01-31 20:35:16,900 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 321 transitions. Word has length 57 [2022-01-31 20:35:16,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:35:16,901 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 321 transitions. [2022-01-31 20:35:16,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 20:35:16,901 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 321 transitions. [2022-01-31 20:35:16,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 20:35:16,902 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:35:16,902 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:35:16,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-01-31 20:35:16,902 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:35:16,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:35:16,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1889457963, now seen corresponding path program 3 times [2022-01-31 20:35:16,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:35:16,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1692563178] [2022-01-31 20:35:16,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:35:16,904 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:35:16,904 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:35:16,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:35:16,905 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:35:16,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:17,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:35:17,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:17,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:35:17,372 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:35:17,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1692563178] [2022-01-31 20:35:17,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1692563178] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:35:17,372 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:35:17,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 20:35:17,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878297114] [2022-01-31 20:35:17,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:35:17,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 20:35:17,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:35:17,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 20:35:17,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2022-01-31 20:35:17,374 INFO L87 Difference]: Start difference. First operand 267 states and 321 transitions. Second operand has 24 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:35:18,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:35:18,543 INFO L93 Difference]: Finished difference Result 312 states and 375 transitions. [2022-01-31 20:35:18,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 20:35:18,543 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-01-31 20:35:18,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:35:18,545 INFO L225 Difference]: With dead ends: 312 [2022-01-31 20:35:18,545 INFO L226 Difference]: Without dead ends: 310 [2022-01-31 20:35:18,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=488, Invalid=2164, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 20:35:18,546 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 149 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 816 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:35:18,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 86 Invalid, 916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 816 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:35:18,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2022-01-31 20:35:18,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 271. [2022-01-31 20:35:18,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 247 states have (on average 1.1862348178137652) internal successors, (293), 254 states have internal predecessors, (293), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (15), 8 states have call predecessors, (15), 15 states have call successors, (15) [2022-01-31 20:35:18,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 324 transitions. [2022-01-31 20:35:18,684 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 324 transitions. Word has length 56 [2022-01-31 20:35:18,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:35:18,684 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 324 transitions. [2022-01-31 20:35:18,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:35:18,685 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 324 transitions. [2022-01-31 20:35:18,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-31 20:35:18,686 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:35:18,686 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:35:18,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-01-31 20:35:18,686 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:35:18,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:35:18,686 INFO L85 PathProgramCache]: Analyzing trace with hash 997874079, now seen corresponding path program 2 times [2022-01-31 20:35:18,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:35:18,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1382792155] [2022-01-31 20:35:18,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:35:18,688 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:35:18,688 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:35:18,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:35:18,689 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:35:18,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:18,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:35:18,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:18,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:35:18,821 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:35:18,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1382792155] [2022-01-31 20:35:18,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1382792155] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:35:18,821 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:35:18,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 20:35:18,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554309006] [2022-01-31 20:35:18,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:35:18,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 20:35:18,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:35:18,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 20:35:18,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-01-31 20:35:18,822 INFO L87 Difference]: Start difference. First operand 271 states and 324 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 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 20:35:19,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:35:19,455 INFO L93 Difference]: Finished difference Result 587 states and 709 transitions. [2022-01-31 20:35:19,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 20:35:19,455 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 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 57 [2022-01-31 20:35:19,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:35:19,457 INFO L225 Difference]: With dead ends: 587 [2022-01-31 20:35:19,457 INFO L226 Difference]: Without dead ends: 479 [2022-01-31 20:35:19,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2022-01-31 20:35:19,458 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 250 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:35:19,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 73 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 20:35:19,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2022-01-31 20:35:19,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 355. [2022-01-31 20:35:19,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 331 states have (on average 1.1691842900302114) internal successors, (387), 338 states have internal predecessors, (387), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (15), 8 states have call predecessors, (15), 15 states have call successors, (15) [2022-01-31 20:35:19,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 418 transitions. [2022-01-31 20:35:19,655 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 418 transitions. Word has length 57 [2022-01-31 20:35:19,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:35:19,656 INFO L470 AbstractCegarLoop]: Abstraction has 355 states and 418 transitions. [2022-01-31 20:35:19,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 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 20:35:19,656 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 418 transitions. [2022-01-31 20:35:19,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-31 20:35:19,657 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:35:19,657 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:35:19,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-01-31 20:35:19,657 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:35:19,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:35:19,658 INFO L85 PathProgramCache]: Analyzing trace with hash 358973142, now seen corresponding path program 1 times [2022-01-31 20:35:19,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:35:19,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [230559613] [2022-01-31 20:35:19,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:35:19,659 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:35:19,659 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:35:19,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:35:19,660 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:35:19,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:19,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:35:19,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:19,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-01-31 20:35:19,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:19,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:35:19,956 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:35:19,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [230559613] [2022-01-31 20:35:19,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [230559613] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:35:19,956 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:35:19,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 20:35:19,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927567914] [2022-01-31 20:35:19,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:35:19,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 20:35:19,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:35:19,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 20:35:19,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2022-01-31 20:35:19,957 INFO L87 Difference]: Start difference. First operand 355 states and 418 transitions. Second operand has 20 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:35:21,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:35:21,527 INFO L93 Difference]: Finished difference Result 409 states and 481 transitions. [2022-01-31 20:35:21,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 20:35:21,528 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 59 [2022-01-31 20:35:21,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:35:21,529 INFO L225 Difference]: With dead ends: 409 [2022-01-31 20:35:21,529 INFO L226 Difference]: Without dead ends: 407 [2022-01-31 20:35:21,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1031 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=547, Invalid=3359, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 20:35:21,530 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 112 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1013 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 1156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 1013 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:35:21,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 87 Invalid, 1156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 1013 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 20:35:21,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-01-31 20:35:21,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 364. [2022-01-31 20:35:21,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 339 states have (on average 1.168141592920354) internal successors, (396), 347 states have internal predecessors, (396), 17 states have call successors, (17), 8 states have call predecessors, (17), 7 states have return successors, (16), 8 states have call predecessors, (16), 16 states have call successors, (16) [2022-01-31 20:35:21,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 429 transitions. [2022-01-31 20:35:21,745 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 429 transitions. Word has length 59 [2022-01-31 20:35:21,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:35:21,746 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 429 transitions. [2022-01-31 20:35:21,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:35:21,746 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 429 transitions. [2022-01-31 20:35:21,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-31 20:35:21,747 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:35:21,747 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:35:21,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-01-31 20:35:21,747 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:35:21,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:35:21,748 INFO L85 PathProgramCache]: Analyzing trace with hash 356238102, now seen corresponding path program 3 times [2022-01-31 20:35:21,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:35:21,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1344301938] [2022-01-31 20:35:21,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:35:21,749 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:35:21,749 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:35:21,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:35:21,750 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:35:21,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:22,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:35:22,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:22,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-01-31 20:35:22,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:22,568 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 20:35:22,568 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:35:22,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1344301938] [2022-01-31 20:35:22,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1344301938] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:35:22,569 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:35:22,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 20:35:22,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839851258] [2022-01-31 20:35:22,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:35:22,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 20:35:22,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:35:22,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 20:35:22,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=844, Unknown=0, NotChecked=0, Total=992 [2022-01-31 20:35:22,570 INFO L87 Difference]: Start difference. First operand 364 states and 429 transitions. Second operand has 32 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 30 states have internal predecessors, (53), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:35:24,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:35:24,753 INFO L93 Difference]: Finished difference Result 545 states and 642 transitions. [2022-01-31 20:35:24,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 20:35:24,753 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 30 states have internal predecessors, (53), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 59 [2022-01-31 20:35:24,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:35:24,755 INFO L225 Difference]: With dead ends: 545 [2022-01-31 20:35:24,755 INFO L226 Difference]: Without dead ends: 543 [2022-01-31 20:35:24,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1634 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=822, Invalid=4728, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 20:35:24,755 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 256 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 1134 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 1352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 1134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 20:35:24,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 69 Invalid, 1352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 1134 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 20:35:24,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2022-01-31 20:35:24,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 420. [2022-01-31 20:35:24,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 393 states have (on average 1.1653944020356235) internal successors, (458), 403 states have internal predecessors, (458), 19 states have call successors, (19), 8 states have call predecessors, (19), 7 states have return successors, (18), 8 states have call predecessors, (18), 18 states have call successors, (18) [2022-01-31 20:35:24,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 495 transitions. [2022-01-31 20:35:24,994 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 495 transitions. Word has length 59 [2022-01-31 20:35:24,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:35:24,995 INFO L470 AbstractCegarLoop]: Abstraction has 420 states and 495 transitions. [2022-01-31 20:35:24,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 30 states have internal predecessors, (53), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:35:24,995 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 495 transitions. [2022-01-31 20:35:24,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-31 20:35:24,996 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:35:24,996 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:35:24,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-01-31 20:35:24,997 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:35:24,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:35:24,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1033874973, now seen corresponding path program 3 times [2022-01-31 20:35:24,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:35:24,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1115236566] [2022-01-31 20:35:24,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:35:24,998 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:35:24,998 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:35:24,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:35:25,000 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:35:25,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:25,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:35:25,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:25,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:35:25,473 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:35:25,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1115236566] [2022-01-31 20:35:25,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1115236566] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:35:25,474 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:35:25,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 20:35:25,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478578741] [2022-01-31 20:35:25,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:35:25,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 20:35:25,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:35:25,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 20:35:25,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-31 20:35:25,475 INFO L87 Difference]: Start difference. First operand 420 states and 495 transitions. Second operand has 23 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 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 20:35:27,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:35:27,322 INFO L93 Difference]: Finished difference Result 577 states and 686 transitions. [2022-01-31 20:35:27,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 20:35:27,323 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 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 59 [2022-01-31 20:35:27,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:35:27,325 INFO L225 Difference]: With dead ends: 577 [2022-01-31 20:35:27,325 INFO L226 Difference]: Without dead ends: 575 [2022-01-31 20:35:27,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1072 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=719, Invalid=3441, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 20:35:27,326 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 214 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 1276 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 1429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 1276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 20:35:27,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 103 Invalid, 1429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 1276 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 20:35:27,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2022-01-31 20:35:27,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 486. [2022-01-31 20:35:27,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 456 states have (on average 1.1754385964912282) internal successors, (536), 468 states have internal predecessors, (536), 21 states have call successors, (21), 9 states have call predecessors, (21), 8 states have return successors, (20), 8 states have call predecessors, (20), 20 states have call successors, (20) [2022-01-31 20:35:27,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 577 transitions. [2022-01-31 20:35:27,630 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 577 transitions. Word has length 59 [2022-01-31 20:35:27,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:35:27,630 INFO L470 AbstractCegarLoop]: Abstraction has 486 states and 577 transitions. [2022-01-31 20:35:27,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 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 20:35:27,631 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 577 transitions. [2022-01-31 20:35:27,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-31 20:35:27,632 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:35:27,632 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:35:27,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-01-31 20:35:27,632 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:35:27,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:35:27,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1495218077, now seen corresponding path program 4 times [2022-01-31 20:35:27,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:35:27,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1828463541] [2022-01-31 20:35:27,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:35:27,634 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:35:27,634 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:35:27,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:35:27,635 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:35:27,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:28,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:35:28,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:28,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:35:28,429 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:35:28,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1828463541] [2022-01-31 20:35:28,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1828463541] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:35:28,429 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:35:28,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 20:35:28,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623423074] [2022-01-31 20:35:28,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:35:28,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 20:35:28,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:35:28,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 20:35:28,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=807, Unknown=0, NotChecked=0, Total=992 [2022-01-31 20:35:28,430 INFO L87 Difference]: Start difference. First operand 486 states and 577 transitions. Second operand has 32 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 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 20:35:30,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:35:30,085 INFO L93 Difference]: Finished difference Result 597 states and 711 transitions. [2022-01-31 20:35:30,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 20:35:30,085 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-01-31 20:35:30,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:35:30,087 INFO L225 Difference]: With dead ends: 597 [2022-01-31 20:35:30,087 INFO L226 Difference]: Without dead ends: 595 [2022-01-31 20:35:30,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1265 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=684, Invalid=3476, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 20:35:30,088 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 328 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1355 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 1562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 1355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 20:35:30,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [328 Valid, 101 Invalid, 1562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 1355 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 20:35:30,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2022-01-31 20:35:30,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 500. [2022-01-31 20:35:30,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 471 states have (on average 1.1804670912951167) internal successors, (556), 482 states have internal predecessors, (556), 20 states have call successors, (20), 9 states have call predecessors, (20), 8 states have return successors, (19), 8 states have call predecessors, (19), 19 states have call successors, (19) [2022-01-31 20:35:30,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 595 transitions. [2022-01-31 20:35:30,384 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 595 transitions. Word has length 59 [2022-01-31 20:35:30,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:35:30,384 INFO L470 AbstractCegarLoop]: Abstraction has 500 states and 595 transitions. [2022-01-31 20:35:30,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 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 20:35:30,384 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 595 transitions. [2022-01-31 20:35:30,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-31 20:35:30,386 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:35:30,386 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:35:30,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-01-31 20:35:30,386 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:35:30,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:35:30,386 INFO L85 PathProgramCache]: Analyzing trace with hash -989126035, now seen corresponding path program 6 times [2022-01-31 20:35:30,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:35:30,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [336287538] [2022-01-31 20:35:30,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:35:30,388 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:35:30,388 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:35:30,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:35:30,389 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:35:30,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:31,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:35:31,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:31,110 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 20:35:31,110 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:35:31,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [336287538] [2022-01-31 20:35:31,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [336287538] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:35:31,110 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:35:31,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 20:35:31,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17015909] [2022-01-31 20:35:31,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:35:31,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 20:35:31,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:35:31,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 20:35:31,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2022-01-31 20:35:31,111 INFO L87 Difference]: Start difference. First operand 500 states and 595 transitions. Second operand has 30 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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 20:35:33,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:35:33,279 INFO L93 Difference]: Finished difference Result 743 states and 887 transitions. [2022-01-31 20:35:33,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-31 20:35:33,279 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-01-31 20:35:33,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:35:33,281 INFO L225 Difference]: With dead ends: 743 [2022-01-31 20:35:33,281 INFO L226 Difference]: Without dead ends: 741 [2022-01-31 20:35:33,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1313 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=625, Invalid=4345, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 20:35:33,282 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 318 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 1907 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 2059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 1907 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 20:35:33,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 111 Invalid, 2059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 1907 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 20:35:33,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2022-01-31 20:35:33,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 517. [2022-01-31 20:35:33,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 485 states have (on average 1.179381443298969) internal successors, (572), 497 states have internal predecessors, (572), 21 states have call successors, (21), 11 states have call predecessors, (21), 10 states have return successors, (20), 8 states have call predecessors, (20), 20 states have call successors, (20) [2022-01-31 20:35:33,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 613 transitions. [2022-01-31 20:35:33,724 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 613 transitions. Word has length 59 [2022-01-31 20:35:33,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:35:33,724 INFO L470 AbstractCegarLoop]: Abstraction has 517 states and 613 transitions. [2022-01-31 20:35:33,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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 20:35:33,724 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 613 transitions. [2022-01-31 20:35:33,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-31 20:35:33,725 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:35:33,725 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:35:33,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-01-31 20:35:33,726 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:35:33,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:35:33,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1813715541, now seen corresponding path program 4 times [2022-01-31 20:35:33,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:35:33,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1072320404] [2022-01-31 20:35:33,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:35:33,729 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:35:33,729 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:35:33,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:35:33,730 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:35:33,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:34,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:35:34,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:34,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:35:34,378 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:35:34,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1072320404] [2022-01-31 20:35:34,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1072320404] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:35:34,379 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:35:34,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 20:35:34,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927997682] [2022-01-31 20:35:34,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:35:34,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 20:35:34,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:35:34,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 20:35:34,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2022-01-31 20:35:34,380 INFO L87 Difference]: Start difference. First operand 517 states and 613 transitions. Second operand has 27 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 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 20:35:35,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:35:35,654 INFO L93 Difference]: Finished difference Result 609 states and 722 transitions. [2022-01-31 20:35:35,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 20:35:35,654 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 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 59 [2022-01-31 20:35:35,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:35:35,656 INFO L225 Difference]: With dead ends: 609 [2022-01-31 20:35:35,656 INFO L226 Difference]: Without dead ends: 607 [2022-01-31 20:35:35,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 716 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=379, Invalid=2273, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 20:35:35,656 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 139 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 1125 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 1215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:35:35,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 90 Invalid, 1215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1125 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 20:35:35,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2022-01-31 20:35:35,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 547. [2022-01-31 20:35:35,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 512 states have (on average 1.177734375) internal successors, (603), 526 states have internal predecessors, (603), 23 states have call successors, (23), 12 states have call predecessors, (23), 11 states have return successors, (22), 8 states have call predecessors, (22), 22 states have call successors, (22) [2022-01-31 20:35:35,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 648 transitions. [2022-01-31 20:35:35,983 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 648 transitions. Word has length 59 [2022-01-31 20:35:35,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:35:35,984 INFO L470 AbstractCegarLoop]: Abstraction has 547 states and 648 transitions. [2022-01-31 20:35:35,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 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 20:35:35,984 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 648 transitions. [2022-01-31 20:35:35,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-31 20:35:35,985 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:35:35,985 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:35:35,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-01-31 20:35:35,986 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:35:35,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:35:35,986 INFO L85 PathProgramCache]: Analyzing trace with hash -715377509, now seen corresponding path program 5 times [2022-01-31 20:35:35,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:35:35,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [940428170] [2022-01-31 20:35:35,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:35:35,987 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:35:35,988 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:35:35,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:35:35,989 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:35:36,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:36,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:35:36,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:36,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:35:36,610 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:35:36,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [940428170] [2022-01-31 20:35:36,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [940428170] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:35:36,610 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:35:36,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 20:35:36,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816665605] [2022-01-31 20:35:36,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:35:36,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 20:35:36,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:35:36,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 20:35:36,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=612, Unknown=0, NotChecked=0, Total=756 [2022-01-31 20:35:36,611 INFO L87 Difference]: Start difference. First operand 547 states and 648 transitions. Second operand has 28 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 26 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 20:35:38,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:35:38,061 INFO L93 Difference]: Finished difference Result 633 states and 749 transitions. [2022-01-31 20:35:38,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 20:35:38,061 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 26 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 59 [2022-01-31 20:35:38,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:35:38,063 INFO L225 Difference]: With dead ends: 633 [2022-01-31 20:35:38,063 INFO L226 Difference]: Without dead ends: 631 [2022-01-31 20:35:38,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=541, Invalid=2765, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 20:35:38,063 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 165 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 917 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 1037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:35:38,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 85 Invalid, 1037 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 917 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:35:38,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2022-01-31 20:35:38,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 547. [2022-01-31 20:35:38,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 512 states have (on average 1.177734375) internal successors, (603), 526 states have internal predecessors, (603), 23 states have call successors, (23), 12 states have call predecessors, (23), 11 states have return successors, (22), 8 states have call predecessors, (22), 22 states have call successors, (22) [2022-01-31 20:35:38,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 648 transitions. [2022-01-31 20:35:38,471 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 648 transitions. Word has length 59 [2022-01-31 20:35:38,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:35:38,471 INFO L470 AbstractCegarLoop]: Abstraction has 547 states and 648 transitions. [2022-01-31 20:35:38,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 26 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 20:35:38,471 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 648 transitions. [2022-01-31 20:35:38,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 20:35:38,473 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:35:38,474 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:35:38,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-01-31 20:35:38,474 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:35:38,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:35:38,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1054815615, now seen corresponding path program 2 times [2022-01-31 20:35:38,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:35:38,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1790362836] [2022-01-31 20:35:38,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:35:38,477 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:35:38,477 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:35:38,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:35:38,478 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:35:38,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:38,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:35:38,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:38,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 20:35:38,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:38,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 20:35:38,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:38,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:35:38,890 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:35:38,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1790362836] [2022-01-31 20:35:38,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1790362836] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:35:38,891 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:35:38,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 20:35:38,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901466658] [2022-01-31 20:35:38,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:35:38,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 20:35:38,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:35:38,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 20:35:38,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-31 20:35:38,892 INFO L87 Difference]: Start difference. First operand 547 states and 648 transitions. Second operand has 21 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 20:35:39,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:35:39,994 INFO L93 Difference]: Finished difference Result 619 states and 733 transitions. [2022-01-31 20:35:39,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 20:35:39,995 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 62 [2022-01-31 20:35:39,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:35:39,996 INFO L225 Difference]: With dead ends: 619 [2022-01-31 20:35:39,997 INFO L226 Difference]: Without dead ends: 617 [2022-01-31 20:35:39,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=263, Invalid=1459, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 20:35:39,997 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 214 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 796 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:35:39,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 68 Invalid, 915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 796 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:35:39,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2022-01-31 20:35:40,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 547. [2022-01-31 20:35:40,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 512 states have (on average 1.177734375) internal successors, (603), 526 states have internal predecessors, (603), 23 states have call successors, (23), 12 states have call predecessors, (23), 11 states have return successors, (22), 8 states have call predecessors, (22), 22 states have call successors, (22) [2022-01-31 20:35:40,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 648 transitions. [2022-01-31 20:35:40,482 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 648 transitions. Word has length 62 [2022-01-31 20:35:40,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:35:40,483 INFO L470 AbstractCegarLoop]: Abstraction has 547 states and 648 transitions. [2022-01-31 20:35:40,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 20:35:40,483 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 648 transitions. [2022-01-31 20:35:40,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 20:35:40,484 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:35:40,484 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:35:40,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-01-31 20:35:40,484 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:35:40,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:35:40,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1873320726, now seen corresponding path program 3 times [2022-01-31 20:35:40,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:35:40,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [566206332] [2022-01-31 20:35:40,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:35:40,486 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:35:40,486 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:35:40,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:35:40,488 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:35:40,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:41,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:35:41,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:41,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 20:35:41,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:41,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:35:41,020 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:35:41,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [566206332] [2022-01-31 20:35:41,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [566206332] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:35:41,021 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:35:41,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 20:35:41,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389340145] [2022-01-31 20:35:41,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:35:41,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 20:35:41,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:35:41,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 20:35:41,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2022-01-31 20:35:41,022 INFO L87 Difference]: Start difference. First operand 547 states and 648 transitions. Second operand has 26 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:35:42,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:35:42,694 INFO L93 Difference]: Finished difference Result 761 states and 907 transitions. [2022-01-31 20:35:42,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 20:35:42,695 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 62 [2022-01-31 20:35:42,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:35:42,697 INFO L225 Difference]: With dead ends: 761 [2022-01-31 20:35:42,697 INFO L226 Difference]: Without dead ends: 699 [2022-01-31 20:35:42,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1002 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=419, Invalid=3121, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 20:35:42,698 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 278 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 1492 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 1641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 1492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 20:35:42,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 74 Invalid, 1641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 1492 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 20:35:42,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2022-01-31 20:35:43,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 578. [2022-01-31 20:35:43,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 541 states have (on average 1.1829944547134936) internal successors, (640), 557 states have internal predecessors, (640), 25 states have call successors, (25), 12 states have call predecessors, (25), 11 states have return successors, (24), 8 states have call predecessors, (24), 24 states have call successors, (24) [2022-01-31 20:35:43,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 689 transitions. [2022-01-31 20:35:43,082 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 689 transitions. Word has length 62 [2022-01-31 20:35:43,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:35:43,082 INFO L470 AbstractCegarLoop]: Abstraction has 578 states and 689 transitions. [2022-01-31 20:35:43,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:35:43,082 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 689 transitions. [2022-01-31 20:35:43,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 20:35:43,084 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:35:43,084 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:35:43,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-01-31 20:35:43,084 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:35:43,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:35:43,084 INFO L85 PathProgramCache]: Analyzing trace with hash -2048520356, now seen corresponding path program 4 times [2022-01-31 20:35:43,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:35:43,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [14822451] [2022-01-31 20:35:43,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:35:43,086 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:35:43,086 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:35:43,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:35:43,087 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:35:43,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:43,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:35:43,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:43,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 20:35:43,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:43,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:35:43,435 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:35:43,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [14822451] [2022-01-31 20:35:43,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [14822451] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:35:43,435 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:35:43,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 20:35:43,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754968672] [2022-01-31 20:35:43,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:35:43,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 20:35:43,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:35:43,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 20:35:43,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2022-01-31 20:35:43,437 INFO L87 Difference]: Start difference. First operand 578 states and 689 transitions. Second operand has 23 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:35:44,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:35:44,894 INFO L93 Difference]: Finished difference Result 696 states and 832 transitions. [2022-01-31 20:35:44,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 20:35:44,894 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 62 [2022-01-31 20:35:44,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:35:44,896 INFO L225 Difference]: With dead ends: 696 [2022-01-31 20:35:44,896 INFO L226 Difference]: Without dead ends: 694 [2022-01-31 20:35:44,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=350, Invalid=2302, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 20:35:44,897 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 187 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1209 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 1317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 1209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:35:44,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 101 Invalid, 1317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 1209 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 20:35:44,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2022-01-31 20:35:45,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 610. [2022-01-31 20:35:45,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 569 states have (on average 1.1827768014059754) internal successors, (673), 587 states have internal predecessors, (673), 28 states have call successors, (28), 13 states have call predecessors, (28), 12 states have return successors, (27), 9 states have call predecessors, (27), 27 states have call successors, (27) [2022-01-31 20:35:45,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 728 transitions. [2022-01-31 20:35:45,319 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 728 transitions. Word has length 62 [2022-01-31 20:35:45,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:35:45,319 INFO L470 AbstractCegarLoop]: Abstraction has 610 states and 728 transitions. [2022-01-31 20:35:45,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:35:45,320 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 728 transitions. [2022-01-31 20:35:45,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 20:35:45,321 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:35:45,321 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:35:45,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-01-31 20:35:45,322 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:35:45,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:35:45,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1980682524, now seen corresponding path program 4 times [2022-01-31 20:35:45,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:35:45,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2138121102] [2022-01-31 20:35:45,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:35:45,324 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:35:45,324 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:35:45,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:35:45,325 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:35:45,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:45,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:35:45,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:45,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 20:35:45,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:45,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:35:45,921 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:35:45,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2138121102] [2022-01-31 20:35:45,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2138121102] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:35:45,922 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:35:45,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 20:35:45,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837630884] [2022-01-31 20:35:45,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:35:45,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 20:35:45,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:35:45,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 20:35:45,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2022-01-31 20:35:45,923 INFO L87 Difference]: Start difference. First operand 610 states and 728 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:35:47,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:35:47,560 INFO L93 Difference]: Finished difference Result 816 states and 977 transitions. [2022-01-31 20:35:47,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 20:35:47,561 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 62 [2022-01-31 20:35:47,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:35:47,563 INFO L225 Difference]: With dead ends: 816 [2022-01-31 20:35:47,563 INFO L226 Difference]: Without dead ends: 814 [2022-01-31 20:35:47,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 988 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=426, Invalid=3114, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 20:35:47,564 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 324 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1381 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 1519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 1381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 20:35:47,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 75 Invalid, 1519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 1381 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 20:35:47,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2022-01-31 20:35:47,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 607. [2022-01-31 20:35:47,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 566 states have (on average 1.1837455830388692) internal successors, (670), 584 states have internal predecessors, (670), 28 states have call successors, (28), 13 states have call predecessors, (28), 12 states have return successors, (27), 9 states have call predecessors, (27), 27 states have call successors, (27) [2022-01-31 20:35:47,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 725 transitions. [2022-01-31 20:35:47,981 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 725 transitions. Word has length 62 [2022-01-31 20:35:47,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:35:47,981 INFO L470 AbstractCegarLoop]: Abstraction has 607 states and 725 transitions. [2022-01-31 20:35:47,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:35:47,982 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 725 transitions. [2022-01-31 20:35:47,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-31 20:35:47,983 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:35:47,983 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:35:47,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-01-31 20:35:47,984 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:35:47,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:35:47,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1516193256, now seen corresponding path program 6 times [2022-01-31 20:35:47,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:35:47,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1156846715] [2022-01-31 20:35:47,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:35:47,985 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:35:47,986 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:35:47,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:35:47,987 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:35:48,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:48,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:35:48,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:48,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-01-31 20:35:48,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:48,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-01-31 20:35:48,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:48,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-01-31 20:35:48,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:48,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:35:48,137 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:35:48,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1156846715] [2022-01-31 20:35:48,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1156846715] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:35:48,137 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:35:48,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 20:35:48,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311895233] [2022-01-31 20:35:48,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:35:48,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 20:35:48,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:35:48,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 20:35:48,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-01-31 20:35:48,138 INFO L87 Difference]: Start difference. First operand 607 states and 725 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 20:35:49,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:35:49,047 INFO L93 Difference]: Finished difference Result 781 states and 935 transitions. [2022-01-31 20:35:49,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 20:35:49,048 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 65 [2022-01-31 20:35:49,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:35:49,050 INFO L225 Difference]: With dead ends: 781 [2022-01-31 20:35:49,050 INFO L226 Difference]: Without dead ends: 718 [2022-01-31 20:35:49,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2022-01-31 20:35:49,050 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 246 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:35:49,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 86 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 563 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:35:49,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2022-01-31 20:35:49,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 585. [2022-01-31 20:35:49,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 547 states have (on average 1.1718464351005484) internal successors, (641), 564 states have internal predecessors, (641), 27 states have call successors, (27), 11 states have call predecessors, (27), 10 states have return successors, (25), 9 states have call predecessors, (25), 25 states have call successors, (25) [2022-01-31 20:35:49,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 693 transitions. [2022-01-31 20:35:49,433 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 693 transitions. Word has length 65 [2022-01-31 20:35:49,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:35:49,433 INFO L470 AbstractCegarLoop]: Abstraction has 585 states and 693 transitions. [2022-01-31 20:35:49,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 20:35:49,433 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 693 transitions. [2022-01-31 20:35:49,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-31 20:35:49,434 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:35:49,434 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:35:49,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-01-31 20:35:49,434 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:35:49,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:35:49,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1181046921, now seen corresponding path program 1 times [2022-01-31 20:35:49,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:35:49,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [919985402] [2022-01-31 20:35:49,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:35:49,436 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:35:49,436 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:35:49,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:35:49,438 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:35:49,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:50,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:35:50,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:50,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 20:35:50,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:50,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:35:50,339 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:35:50,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [919985402] [2022-01-31 20:35:50,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [919985402] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:35:50,340 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:35:50,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 20:35:50,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24883316] [2022-01-31 20:35:50,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:35:50,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 20:35:50,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:35:50,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 20:35:50,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 20:35:50,341 INFO L87 Difference]: Start difference. First operand 585 states and 693 transitions. Second operand has 33 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:35:55,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:35:55,102 INFO L93 Difference]: Finished difference Result 964 states and 1155 transitions. [2022-01-31 20:35:55,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-31 20:35:55,103 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 64 [2022-01-31 20:35:55,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:35:55,105 INFO L225 Difference]: With dead ends: 964 [2022-01-31 20:35:55,105 INFO L226 Difference]: Without dead ends: 962 [2022-01-31 20:35:55,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3418 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1640, Invalid=9280, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 20:35:55,106 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 499 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 2443 mSolverCounterSat, 514 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 499 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 2957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 514 IncrementalHoareTripleChecker+Valid, 2443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:35:55,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [499 Valid, 115 Invalid, 2957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [514 Valid, 2443 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 20:35:55,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 962 states. [2022-01-31 20:35:55,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 962 to 724. [2022-01-31 20:35:55,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 724 states, 684 states have (on average 1.1842105263157894) internal successors, (810), 701 states have internal predecessors, (810), 29 states have call successors, (29), 11 states have call predecessors, (29), 10 states have return successors, (27), 11 states have call predecessors, (27), 27 states have call successors, (27) [2022-01-31 20:35:55,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 866 transitions. [2022-01-31 20:35:55,631 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 866 transitions. Word has length 64 [2022-01-31 20:35:55,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:35:55,631 INFO L470 AbstractCegarLoop]: Abstraction has 724 states and 866 transitions. [2022-01-31 20:35:55,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:35:55,632 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 866 transitions. [2022-01-31 20:35:55,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-31 20:35:55,633 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:35:55,633 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:35:55,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-01-31 20:35:55,634 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:35:55,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:35:55,634 INFO L85 PathProgramCache]: Analyzing trace with hash 968751897, now seen corresponding path program 4 times [2022-01-31 20:35:55,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:35:55,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [210102557] [2022-01-31 20:35:55,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:35:55,635 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:35:55,636 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:35:55,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:35:55,637 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:35:55,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:56,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:35:56,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:56,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 20:35:56,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:56,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:35:56,523 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:35:56,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [210102557] [2022-01-31 20:35:56,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [210102557] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:35:56,523 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:35:56,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 20:35:56,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729019381] [2022-01-31 20:35:56,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:35:56,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 20:35:56,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:35:56,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 20:35:56,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=969, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 20:35:56,524 INFO L87 Difference]: Start difference. First operand 724 states and 866 transitions. Second operand has 34 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 states have internal predecessors, (58), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:35:58,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:35:58,884 INFO L93 Difference]: Finished difference Result 767 states and 913 transitions. [2022-01-31 20:35:58,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 20:35:58,884 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 states have internal predecessors, (58), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 64 [2022-01-31 20:35:58,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:35:58,886 INFO L225 Difference]: With dead ends: 767 [2022-01-31 20:35:58,886 INFO L226 Difference]: Without dead ends: 747 [2022-01-31 20:35:58,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1777 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=690, Invalid=5162, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 20:35:58,887 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 151 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 1514 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 1653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 1514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 20:35:58,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 84 Invalid, 1653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 1514 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 20:35:58,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2022-01-31 20:35:59,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 698. [2022-01-31 20:35:59,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 660 states have (on average 1.1863636363636363) internal successors, (783), 676 states have internal predecessors, (783), 28 states have call successors, (28), 10 states have call predecessors, (28), 9 states have return successors, (26), 11 states have call predecessors, (26), 26 states have call successors, (26) [2022-01-31 20:35:59,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 837 transitions. [2022-01-31 20:35:59,387 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 837 transitions. Word has length 64 [2022-01-31 20:35:59,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:35:59,387 INFO L470 AbstractCegarLoop]: Abstraction has 698 states and 837 transitions. [2022-01-31 20:35:59,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 states have internal predecessors, (58), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:35:59,388 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 837 transitions. [2022-01-31 20:35:59,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-31 20:35:59,389 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:35:59,389 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:35:59,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-01-31 20:35:59,389 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:35:59,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:35:59,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1602966465, now seen corresponding path program 7 times [2022-01-31 20:35:59,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:35:59,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [624854010] [2022-01-31 20:35:59,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:35:59,391 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:35:59,391 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:35:59,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:35:59,393 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:35:59,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:59,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:35:59,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:59,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-01-31 20:35:59,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:59,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-01-31 20:35:59,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:35:59,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:35:59,945 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:35:59,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [624854010] [2022-01-31 20:35:59,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [624854010] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:35:59,945 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:35:59,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 20:35:59,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880330647] [2022-01-31 20:35:59,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:35:59,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 20:35:59,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:35:59,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 20:35:59,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2022-01-31 20:35:59,946 INFO L87 Difference]: Start difference. First operand 698 states and 837 transitions. Second operand has 24 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 20:36:01,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:36:01,492 INFO L93 Difference]: Finished difference Result 959 states and 1159 transitions. [2022-01-31 20:36:01,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 20:36:01,493 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 65 [2022-01-31 20:36:01,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:36:01,495 INFO L225 Difference]: With dead ends: 959 [2022-01-31 20:36:01,495 INFO L226 Difference]: Without dead ends: 957 [2022-01-31 20:36:01,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=291, Invalid=1965, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 20:36:01,496 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 284 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 1139 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 1264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 1139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:36:01,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 100 Invalid, 1264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 1139 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 20:36:01,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2022-01-31 20:36:02,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 733. [2022-01-31 20:36:02,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 733 states, 687 states have (on average 1.1819505094614264) internal successors, (812), 707 states have internal predecessors, (812), 35 states have call successors, (35), 11 states have call predecessors, (35), 10 states have return successors, (33), 14 states have call predecessors, (33), 33 states have call successors, (33) [2022-01-31 20:36:02,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 880 transitions. [2022-01-31 20:36:02,050 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 880 transitions. Word has length 65 [2022-01-31 20:36:02,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:36:02,051 INFO L470 AbstractCegarLoop]: Abstraction has 733 states and 880 transitions. [2022-01-31 20:36:02,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 20:36:02,051 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 880 transitions. [2022-01-31 20:36:02,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-31 20:36:02,052 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:36:02,053 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:36:02,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-01-31 20:36:02,053 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:36:02,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:36:02,053 INFO L85 PathProgramCache]: Analyzing trace with hash 873252058, now seen corresponding path program 5 times [2022-01-31 20:36:02,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:36:02,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [213806033] [2022-01-31 20:36:02,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:36:02,055 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:36:02,055 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:36:02,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:36:02,056 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:36:02,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:36:02,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:36:02,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:36:02,809 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 20:36:02,809 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:36:02,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [213806033] [2022-01-31 20:36:02,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [213806033] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:36:02,809 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:36:02,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 20:36:02,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652748986] [2022-01-31 20:36:02,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:36:02,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 20:36:02,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:36:02,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 20:36:02,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-31 20:36:02,810 INFO L87 Difference]: Start difference. First operand 733 states and 880 transitions. Second operand has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:36:04,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:36:04,574 INFO L93 Difference]: Finished difference Result 928 states and 1121 transitions. [2022-01-31 20:36:04,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 20:36:04,574 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-01-31 20:36:04,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:36:04,576 INFO L225 Difference]: With dead ends: 928 [2022-01-31 20:36:04,576 INFO L226 Difference]: Without dead ends: 808 [2022-01-31 20:36:04,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=366, Invalid=2184, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 20:36:04,577 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 153 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 1067 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1067 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:36:04,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 58 Invalid, 1166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1067 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 20:36:04,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2022-01-31 20:36:05,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 757. [2022-01-31 20:36:05,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 757 states, 711 states have (on average 1.180028129395218) internal successors, (839), 731 states have internal predecessors, (839), 35 states have call successors, (35), 11 states have call predecessors, (35), 10 states have return successors, (33), 14 states have call predecessors, (33), 33 states have call successors, (33) [2022-01-31 20:36:05,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 907 transitions. [2022-01-31 20:36:05,149 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 907 transitions. Word has length 64 [2022-01-31 20:36:05,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:36:05,149 INFO L470 AbstractCegarLoop]: Abstraction has 757 states and 907 transitions. [2022-01-31 20:36:05,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:36:05,150 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 907 transitions. [2022-01-31 20:36:05,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-31 20:36:05,151 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:36:05,151 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:36:05,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-01-31 20:36:05,151 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:36:05,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:36:05,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1868426852, now seen corresponding path program 6 times [2022-01-31 20:36:05,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:36:05,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [574848666] [2022-01-31 20:36:05,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:36:05,153 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:36:05,153 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:36:05,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:36:05,155 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:36:05,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:36:05,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:36:05,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:36:05,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:36:05,730 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:36:05,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [574848666] [2022-01-31 20:36:05,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [574848666] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:36:05,730 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:36:05,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 20:36:05,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664867611] [2022-01-31 20:36:05,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:36:05,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 20:36:05,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:36:05,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 20:36:05,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2022-01-31 20:36:05,731 INFO L87 Difference]: Start difference. First operand 757 states and 907 transitions. Second operand has 28 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:36:08,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:36:08,477 INFO L93 Difference]: Finished difference Result 997 states and 1198 transitions. [2022-01-31 20:36:08,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-31 20:36:08,477 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-01-31 20:36:08,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:36:08,480 INFO L225 Difference]: With dead ends: 997 [2022-01-31 20:36:08,480 INFO L226 Difference]: Without dead ends: 995 [2022-01-31 20:36:08,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1718 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=889, Invalid=5431, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 20:36:08,481 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 367 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 2011 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 2241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 2011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 20:36:08,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [367 Valid, 101 Invalid, 2241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 2011 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 20:36:08,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2022-01-31 20:36:09,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 777. [2022-01-31 20:36:09,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 777 states, 727 states have (on average 1.1788170563961486) internal successors, (857), 749 states have internal predecessors, (857), 37 states have call successors, (37), 13 states have call predecessors, (37), 12 states have return successors, (35), 14 states have call predecessors, (35), 35 states have call successors, (35) [2022-01-31 20:36:09,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 929 transitions. [2022-01-31 20:36:09,073 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 929 transitions. Word has length 64 [2022-01-31 20:36:09,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:36:09,074 INFO L470 AbstractCegarLoop]: Abstraction has 777 states and 929 transitions. [2022-01-31 20:36:09,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:36:09,074 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 929 transitions. [2022-01-31 20:36:09,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-31 20:36:09,075 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:36:09,075 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:36:09,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-01-31 20:36:09,076 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:36:09,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:36:09,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1566333674, now seen corresponding path program 6 times [2022-01-31 20:36:09,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:36:09,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [179660371] [2022-01-31 20:36:09,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:36:09,077 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:36:09,078 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:36:09,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:36:09,079 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:36:09,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:36:09,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:36:09,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:36:09,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:36:09,864 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:36:09,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [179660371] [2022-01-31 20:36:09,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [179660371] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:36:09,864 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:36:09,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 20:36:09,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855108135] [2022-01-31 20:36:09,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:36:09,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 20:36:09,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:36:09,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 20:36:09,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2022-01-31 20:36:09,866 INFO L87 Difference]: Start difference. First operand 777 states and 929 transitions. Second operand has 30 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 28 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:36:12,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:36:12,630 INFO L93 Difference]: Finished difference Result 1199 states and 1448 transitions. [2022-01-31 20:36:12,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 20:36:12,630 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 28 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-01-31 20:36:12,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:36:12,633 INFO L225 Difference]: With dead ends: 1199 [2022-01-31 20:36:12,633 INFO L226 Difference]: Without dead ends: 983 [2022-01-31 20:36:12,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1543 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=906, Invalid=4794, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 20:36:12,634 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 338 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 1819 mSolverCounterSat, 281 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 2100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 281 IncrementalHoareTripleChecker+Valid, 1819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 20:36:12,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 84 Invalid, 2100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [281 Valid, 1819 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 20:36:12,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2022-01-31 20:36:13,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 809. [2022-01-31 20:36:13,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 809 states, 759 states have (on average 1.1831357048748352) internal successors, (898), 781 states have internal predecessors, (898), 37 states have call successors, (37), 13 states have call predecessors, (37), 12 states have return successors, (35), 14 states have call predecessors, (35), 35 states have call successors, (35) [2022-01-31 20:36:13,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 970 transitions. [2022-01-31 20:36:13,260 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 970 transitions. Word has length 64 [2022-01-31 20:36:13,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:36:13,260 INFO L470 AbstractCegarLoop]: Abstraction has 809 states and 970 transitions. [2022-01-31 20:36:13,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 28 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:36:13,260 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 970 transitions. [2022-01-31 20:36:13,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-31 20:36:13,261 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:36:13,262 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:36:13,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-01-31 20:36:13,262 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:36:13,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:36:13,262 INFO L85 PathProgramCache]: Analyzing trace with hash 998054042, now seen corresponding path program 7 times [2022-01-31 20:36:13,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:36:13,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1467061467] [2022-01-31 20:36:13,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:36:13,264 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:36:13,264 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:36:13,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:36:13,265 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:36:13,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:36:13,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:36:13,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:36:13,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:36:13,940 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:36:13,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1467061467] [2022-01-31 20:36:13,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1467061467] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:36:13,941 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:36:13,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 20:36:13,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003942427] [2022-01-31 20:36:13,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:36:13,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 20:36:13,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:36:13,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 20:36:13,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2022-01-31 20:36:13,941 INFO L87 Difference]: Start difference. First operand 809 states and 970 transitions. Second operand has 29 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:36:16,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:36:16,282 INFO L93 Difference]: Finished difference Result 1052 states and 1263 transitions. [2022-01-31 20:36:16,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-31 20:36:16,283 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-01-31 20:36:16,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:36:16,285 INFO L225 Difference]: With dead ends: 1052 [2022-01-31 20:36:16,285 INFO L226 Difference]: Without dead ends: 912 [2022-01-31 20:36:16,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1198 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=534, Invalid=4022, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 20:36:16,286 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 187 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 2102 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 2198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 2102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 20:36:16,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 105 Invalid, 2198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 2102 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 20:36:16,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 912 states. [2022-01-31 20:36:16,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 912 to 836. [2022-01-31 20:36:16,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 836 states, 783 states have (on average 1.1839080459770115) internal successors, (927), 807 states have internal predecessors, (927), 39 states have call successors, (39), 14 states have call predecessors, (39), 13 states have return successors, (37), 14 states have call predecessors, (37), 37 states have call successors, (37) [2022-01-31 20:36:16,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 1003 transitions. [2022-01-31 20:36:16,947 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 1003 transitions. Word has length 64 [2022-01-31 20:36:16,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:36:16,947 INFO L470 AbstractCegarLoop]: Abstraction has 836 states and 1003 transitions. [2022-01-31 20:36:16,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:36:16,947 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 1003 transitions. [2022-01-31 20:36:16,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-31 20:36:16,948 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:36:16,948 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:36:16,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-01-31 20:36:16,949 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:36:16,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:36:16,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1363947086, now seen corresponding path program 8 times [2022-01-31 20:36:16,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:36:16,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [60333513] [2022-01-31 20:36:16,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:36:16,951 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:36:16,951 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:36:16,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:36:16,952 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:36:16,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:36:17,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:36:17,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:36:17,499 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 20:36:17,500 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:36:17,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [60333513] [2022-01-31 20:36:17,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [60333513] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:36:17,500 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:36:17,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 20:36:17,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226572544] [2022-01-31 20:36:17,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:36:17,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 20:36:17,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:36:17,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 20:36:17,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-01-31 20:36:17,501 INFO L87 Difference]: Start difference. First operand 836 states and 1003 transitions. Second operand has 26 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:36:19,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:36:19,112 INFO L93 Difference]: Finished difference Result 986 states and 1184 transitions. [2022-01-31 20:36:19,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 20:36:19,112 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-01-31 20:36:19,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:36:19,115 INFO L225 Difference]: With dead ends: 986 [2022-01-31 20:36:19,115 INFO L226 Difference]: Without dead ends: 984 [2022-01-31 20:36:19,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=336, Invalid=2016, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 20:36:19,115 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 144 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 900 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 900 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:36:19,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 67 Invalid, 998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 900 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:36:19,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2022-01-31 20:36:19,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 882. [2022-01-31 20:36:19,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 826 states have (on average 1.188861985472155) internal successors, (982), 852 states have internal predecessors, (982), 41 states have call successors, (41), 15 states have call predecessors, (41), 14 states have return successors, (39), 14 states have call predecessors, (39), 39 states have call successors, (39) [2022-01-31 20:36:19,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 1062 transitions. [2022-01-31 20:36:19,819 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 1062 transitions. Word has length 64 [2022-01-31 20:36:19,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:36:19,820 INFO L470 AbstractCegarLoop]: Abstraction has 882 states and 1062 transitions. [2022-01-31 20:36:19,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:36:19,820 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 1062 transitions. [2022-01-31 20:36:19,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-31 20:36:19,821 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:36:19,821 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:36:19,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-01-31 20:36:19,821 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:36:19,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:36:19,821 INFO L85 PathProgramCache]: Analyzing trace with hash -777241936, now seen corresponding path program 2 times [2022-01-31 20:36:19,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:36:19,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [628130245] [2022-01-31 20:36:19,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:36:19,823 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:36:19,823 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:36:19,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:36:19,824 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:36:19,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-31 20:36:19,846 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-01-31 20:36:19,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-31 20:36:19,892 INFO L133 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2022-01-31 20:36:19,892 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-01-31 20:36:19,894 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-01-31 20:36:19,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-01-31 20:36:19,898 INFO L732 BasicCegarLoop]: Path program histogram: [8, 7, 6, 6, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1] [2022-01-31 20:36:19,900 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-31 20:36:19,915 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 08:36:19 BoogieIcfgContainer [2022-01-31 20:36:19,915 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-31 20:36:19,916 INFO L158 Benchmark]: Toolchain (without parser) took 98792.52ms. Allocated memory was 175.1MB in the beginning and 528.5MB in the end (delta: 353.4MB). Free memory was 121.8MB in the beginning and 254.3MB in the end (delta: -132.4MB). Peak memory consumption was 221.9MB. Max. memory is 8.0GB. [2022-01-31 20:36:19,916 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 175.1MB. Free memory is still 138.6MB. There was no memory consumed. Max. memory is 8.0GB. [2022-01-31 20:36:19,916 INFO L158 Benchmark]: CACSL2BoogieTranslator took 269.82ms. Allocated memory is still 175.1MB. Free memory was 121.7MB in the beginning and 147.9MB in the end (delta: -26.2MB). Peak memory consumption was 10.0MB. Max. memory is 8.0GB. [2022-01-31 20:36:19,916 INFO L158 Benchmark]: Boogie Preprocessor took 45.93ms. Allocated memory is still 175.1MB. Free memory was 147.9MB in the beginning and 146.4MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-31 20:36:19,916 INFO L158 Benchmark]: RCFGBuilder took 310.51ms. Allocated memory is still 175.1MB. Free memory was 146.4MB in the beginning and 134.8MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-01-31 20:36:19,916 INFO L158 Benchmark]: TraceAbstraction took 98158.45ms. Allocated memory was 175.1MB in the beginning and 528.5MB in the end (delta: 353.4MB). Free memory was 134.3MB in the beginning and 254.3MB in the end (delta: -120.0MB). Peak memory consumption was 233.9MB. Max. memory is 8.0GB. [2022-01-31 20:36:19,924 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 175.1MB. Free memory is still 138.6MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 269.82ms. Allocated memory is still 175.1MB. Free memory was 121.7MB in the beginning and 147.9MB in the end (delta: -26.2MB). Peak memory consumption was 10.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 45.93ms. Allocated memory is still 175.1MB. Free memory was 147.9MB in the beginning and 146.4MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 310.51ms. Allocated memory is still 175.1MB. Free memory was 146.4MB in the beginning and 134.8MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 98158.45ms. Allocated memory was 175.1MB in the beginning and 528.5MB in the end (delta: 353.4MB). Free memory was 134.3MB in the beginning and 254.3MB in the end (delta: -120.0MB). Peak memory consumption was 233.9MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 7]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L14] unsigned int SIZE=__VERIFIER_nondet_uint(); [L15] int i, j, k, key; [L16] int v[SIZE]; [L17] j=0 [L17] COND TRUE j=0) && (v[i]>key) [L22] EXPR v[i] [L22] (i>=0) && (v[i]>key) [L22] COND FALSE !((i>=0) && (v[i]>key)) [L27] v[i+1] = key [L19] j++ [L19] COND TRUE j=0) && (v[i]>key) [L22] EXPR v[i] [L22] (i>=0) && (v[i]>key) [L22] COND FALSE !((i>=0) && (v[i]>key)) [L27] v[i+1] = key [L19] j++ [L19] COND TRUE j=0) && (v[i]>key) [L22] EXPR v[i] [L22] (i>=0) && (v[i]>key) [L22] COND TRUE (i>=0) && (v[i]>key) [L23] COND FALSE !(i<2) [L25] i = i - 1 [L22] (i>=0) && (v[i]>key) [L22] EXPR v[i] [L22] (i>=0) && (v[i]>key) [L22] COND TRUE (i>=0) && (v[i]>key) [L23] COND TRUE i<2 [L24] EXPR v[i] [L24] v[i+1] = v[i] [L25] i = i - 1 [L22] (i>=0) && (v[i]>key) [L22] EXPR v[i] [L22] (i>=0) && (v[i]>key) [L22] COND FALSE !((i>=0) && (v[i]>key)) [L27] v[i+1] = key [L19] j++ [L19] COND FALSE !(j