/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/array-examples/standard_reverse_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 17:56:25,376 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 17:56:25,378 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 17:56:25,416 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 17:56:25,437 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 17:56:25,438 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 17:56:25,439 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 17:56:25,440 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 17:56:25,440 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 17:56:25,441 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 17:56:25,443 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 17:56:25,444 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 17:56:25,445 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 17:56:25,457 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 17:56:25,460 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 17:56:25,461 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 17:56:25,474 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 17:56:25,481 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 17:56:25,481 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 17:56:25,482 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 17:56:25,483 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-01-31 17:56:25,498 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 17:56:25,498 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 17:56:25,499 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 17:56:25,499 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 17:56:25,499 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 17:56:25,499 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 17:56:25,500 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 17:56:25,500 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 17:56:25,500 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 17:56:25,500 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 17:56:25,500 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 17:56:25,500 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 17:56:25,501 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 17:56:25,501 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 17:56:25,501 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 17:56:25,501 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 17:56:25,501 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 17:56:25,501 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 17:56:25,502 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 17:56:25,502 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 17:56:25,502 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 17:56:25,502 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 17:56:25,502 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 17:56:25,502 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 17:56:25,710 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 17:56:25,725 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 17:56:25,727 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 17:56:25,727 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 17:56:25,728 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 17:56:25,729 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_reverse_ground.i [2022-01-31 17:56:25,782 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4fe0412dc/0539e7cdfcab4755bb7be8afa4e2b301/FLAG7d3057d32 [2022-01-31 17:56:26,161 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 17:56:26,162 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_reverse_ground.i [2022-01-31 17:56:26,176 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4fe0412dc/0539e7cdfcab4755bb7be8afa4e2b301/FLAG7d3057d32 [2022-01-31 17:56:26,193 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4fe0412dc/0539e7cdfcab4755bb7be8afa4e2b301 [2022-01-31 17:56:26,195 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 17:56:26,198 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 17:56:26,202 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 17:56:26,202 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 17:56:26,205 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 17:56:26,206 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:56:26" (1/1) ... [2022-01-31 17:56:26,207 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a6906e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:56:26, skipping insertion in model container [2022-01-31 17:56:26,207 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:56:26" (1/1) ... [2022-01-31 17:56:26,213 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 17:56:26,228 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 17:56:26,402 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_reverse_ground.i[816,829] [2022-01-31 17:56:26,413 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 17:56:26,417 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 17:56:26,428 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_reverse_ground.i[816,829] [2022-01-31 17:56:26,439 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 17:56:26,451 INFO L208 MainTranslator]: Completed translation [2022-01-31 17:56:26,452 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:56:26 WrapperNode [2022-01-31 17:56:26,452 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 17:56:26,453 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 17:56:26,453 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 17:56:26,453 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 17:56:26,461 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:56:26" (1/1) ... [2022-01-31 17:56:26,461 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:56:26" (1/1) ... [2022-01-31 17:56:26,466 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:56:26" (1/1) ... [2022-01-31 17:56:26,466 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:56:26" (1/1) ... [2022-01-31 17:56:26,471 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:56:26" (1/1) ... [2022-01-31 17:56:26,474 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:56:26" (1/1) ... [2022-01-31 17:56:26,475 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:56:26" (1/1) ... [2022-01-31 17:56:26,476 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 17:56:26,477 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 17:56:26,477 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 17:56:26,477 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 17:56:26,478 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:56:26" (1/1) ... [2022-01-31 17:56:26,487 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 17:56:26,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 17:56:26,508 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-31 17:56:26,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-31 17:56:26,545 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 17:56:26,545 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 17:56:26,545 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 17:56:26,545 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 17:56:26,546 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 17:56:26,546 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 17:56:26,546 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 17:56:26,546 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 17:56:26,546 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 17:56:26,546 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 17:56:26,546 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 17:56:26,547 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 17:56:26,547 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 17:56:26,547 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 17:56:26,547 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 17:56:26,547 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 17:56:26,547 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 17:56:26,547 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 17:56:26,547 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 17:56:26,547 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 17:56:26,547 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 17:56:26,599 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 17:56:26,600 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 17:56:26,685 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 17:56:26,689 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 17:56:26,690 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-31 17:56:26,691 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:56:26 BoogieIcfgContainer [2022-01-31 17:56:26,691 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 17:56:26,692 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 17:56:26,693 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 17:56:26,695 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 17:56:26,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 05:56:26" (1/3) ... [2022-01-31 17:56:26,696 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ec62a2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:56:26, skipping insertion in model container [2022-01-31 17:56:26,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:56:26" (2/3) ... [2022-01-31 17:56:26,697 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ec62a2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:56:26, skipping insertion in model container [2022-01-31 17:56:26,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:56:26" (3/3) ... [2022-01-31 17:56:26,698 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_reverse_ground.i [2022-01-31 17:56:26,702 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 17:56:26,702 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 17:56:26,747 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 17:56:26,752 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=JORDAN [2022-01-31 17:56:26,753 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 17:56:26,805 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 20 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:56:26,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-31 17:56:26,811 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:56:26,811 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:56:26,812 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:56:26,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:56:26,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1013160769, now seen corresponding path program 1 times [2022-01-31 17:56:26,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:56:26,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [984929870] [2022-01-31 17:56:26,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:56:26,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:56:26,908 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:56:26,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:27,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:56:27,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:27,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:56:27,080 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:56:27,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [984929870] [2022-01-31 17:56:27,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [984929870] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:56:27,082 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:56:27,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 17:56:27,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690083263] [2022-01-31 17:56:27,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:56:27,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 17:56:27,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:56:27,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 17:56:27,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 17:56:27,120 INFO L87 Difference]: Start difference. First operand has 27 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 20 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 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 17:56:27,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:56:27,172 INFO L93 Difference]: Finished difference Result 46 states and 57 transitions. [2022-01-31 17:56:27,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 17:56:27,174 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 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 17:56:27,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:56:27,180 INFO L225 Difference]: With dead ends: 46 [2022-01-31 17:56:27,180 INFO L226 Difference]: Without dead ends: 22 [2022-01-31 17:56:27,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 17:56:27,191 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:56:27,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 31 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:56:27,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-01-31 17:56:27,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-01-31 17:56:27,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:56:27,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2022-01-31 17:56:27,230 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 15 [2022-01-31 17:56:27,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:56:27,231 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2022-01-31 17:56:27,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 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 17:56:27,231 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2022-01-31 17:56:27,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-31 17:56:27,232 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:56:27,232 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:56:27,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 17:56:27,233 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:56:27,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:56:27,235 INFO L85 PathProgramCache]: Analyzing trace with hash 211576627, now seen corresponding path program 1 times [2022-01-31 17:56:27,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:56:27,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1527258581] [2022-01-31 17:56:27,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:56:27,239 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:56:27,244 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:56:27,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:27,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:56:27,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:27,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:56:27,302 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:56:27,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1527258581] [2022-01-31 17:56:27,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1527258581] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:56:27,302 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:56:27,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 17:56:27,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902490120] [2022-01-31 17:56:27,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:56:27,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 17:56:27,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:56:27,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 17:56:27,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 17:56:27,304 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:27,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:56:27,366 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2022-01-31 17:56:27,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 17:56:27,367 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-01-31 17:56:27,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:56:27,369 INFO L225 Difference]: With dead ends: 40 [2022-01-31 17:56:27,369 INFO L226 Difference]: Without dead ends: 26 [2022-01-31 17:56:27,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 17:56:27,374 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 21 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:56:27,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 26 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:56:27,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-01-31 17:56:27,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2022-01-31 17:56:27,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:56:27,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2022-01-31 17:56:27,381 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 15 [2022-01-31 17:56:27,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:56:27,381 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2022-01-31 17:56:27,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:27,382 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2022-01-31 17:56:27,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-31 17:56:27,382 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:56:27,382 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:56:27,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 17:56:27,383 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:56:27,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:56:27,383 INFO L85 PathProgramCache]: Analyzing trace with hash 775264175, now seen corresponding path program 1 times [2022-01-31 17:56:27,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:56:27,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [557100496] [2022-01-31 17:56:27,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:56:27,403 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:56:27,403 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:56:27,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:56:27,405 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:56:27,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:27,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:56:27,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:27,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:56:27,507 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:56:27,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [557100496] [2022-01-31 17:56:27,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [557100496] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:56:27,508 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:56:27,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 17:56:27,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865560754] [2022-01-31 17:56:27,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:56:27,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 17:56:27,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:56:27,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 17:56:27,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 17:56:27,510 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:27,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:56:27,591 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2022-01-31 17:56:27,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 17:56:27,591 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-01-31 17:56:27,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:56:27,592 INFO L225 Difference]: With dead ends: 45 [2022-01-31 17:56:27,592 INFO L226 Difference]: Without dead ends: 30 [2022-01-31 17:56:27,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-31 17:56:27,599 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 25 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:56:27,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 31 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:56:27,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-01-31 17:56:27,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2022-01-31 17:56:27,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:56:27,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2022-01-31 17:56:27,607 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 19 [2022-01-31 17:56:27,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:56:27,608 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2022-01-31 17:56:27,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:27,608 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2022-01-31 17:56:27,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-31 17:56:27,609 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:56:27,609 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:56:27,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 17:56:27,609 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:56:27,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:56:27,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1735189973, now seen corresponding path program 2 times [2022-01-31 17:56:27,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:56:27,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [574592040] [2022-01-31 17:56:27,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:56:27,613 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:56:27,613 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:56:27,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:56:27,614 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:56:27,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:27,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:56:27,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:27,733 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 17:56:27,733 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:56:27,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [574592040] [2022-01-31 17:56:27,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [574592040] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:56:27,734 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:56:27,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 17:56:27,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407316195] [2022-01-31 17:56:27,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:56:27,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 17:56:27,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:56:27,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 17:56:27,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 17:56:27,736 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:27,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:56:27,822 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2022-01-31 17:56:27,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 17:56:27,823 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-01-31 17:56:27,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:56:27,823 INFO L225 Difference]: With dead ends: 51 [2022-01-31 17:56:27,823 INFO L226 Difference]: Without dead ends: 34 [2022-01-31 17:56:27,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-31 17:56:27,825 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 31 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:56:27,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 26 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:56:27,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-01-31 17:56:27,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2022-01-31 17:56:27,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 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 17:56:27,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2022-01-31 17:56:27,832 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 23 [2022-01-31 17:56:27,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:56:27,832 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2022-01-31 17:56:27,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:27,832 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2022-01-31 17:56:27,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-31 17:56:27,833 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:56:27,833 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:56:27,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 17:56:27,833 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:56:27,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:56:27,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1858072231, now seen corresponding path program 3 times [2022-01-31 17:56:27,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:56:27,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1545369937] [2022-01-31 17:56:27,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:56:27,837 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:56:27,837 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:56:27,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:56:27,838 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:56:27,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:27,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:56:27,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:27,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:56:27,905 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:56:27,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1545369937] [2022-01-31 17:56:27,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1545369937] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:56:27,906 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:56:27,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 17:56:27,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028452072] [2022-01-31 17:56:27,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:56:27,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 17:56:27,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:56:27,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 17:56:27,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-31 17:56:27,908 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:28,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:56:28,042 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2022-01-31 17:56:28,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 17:56:28,043 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-01-31 17:56:28,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:56:28,050 INFO L225 Difference]: With dead ends: 57 [2022-01-31 17:56:28,050 INFO L226 Difference]: Without dead ends: 38 [2022-01-31 17:56:28,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-01-31 17:56:28,056 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 34 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:56:28,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 36 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:56:28,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-01-31 17:56:28,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2022-01-31 17:56:28,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 30 states have (on average 1.1) internal successors, (33), 30 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:56:28,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2022-01-31 17:56:28,067 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 27 [2022-01-31 17:56:28,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:56:28,067 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2022-01-31 17:56:28,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:28,068 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2022-01-31 17:56:28,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-31 17:56:28,069 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:56:28,069 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:56:28,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 17:56:28,069 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:56:28,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:56:28,070 INFO L85 PathProgramCache]: Analyzing trace with hash 88544547, now seen corresponding path program 4 times [2022-01-31 17:56:28,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:56:28,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1201627460] [2022-01-31 17:56:28,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:56:28,078 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:56:28,078 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:56:28,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:56:28,080 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:56:28,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:28,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:56:28,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:28,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:56:28,202 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:56:28,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1201627460] [2022-01-31 17:56:28,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1201627460] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:56:28,202 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:56:28,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 17:56:28,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846192190] [2022-01-31 17:56:28,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:56:28,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 17:56:28,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:56:28,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 17:56:28,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 17:56:28,206 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:28,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:56:28,333 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2022-01-31 17:56:28,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 17:56:28,333 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 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 31 [2022-01-31 17:56:28,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:56:28,335 INFO L225 Difference]: With dead ends: 63 [2022-01-31 17:56:28,335 INFO L226 Difference]: Without dead ends: 42 [2022-01-31 17:56:28,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2022-01-31 17:56:28,338 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 40 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:56:28,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 31 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:56:28,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-01-31 17:56:28,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2022-01-31 17:56:28,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 34 states have (on average 1.088235294117647) internal successors, (37), 34 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:56:28,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2022-01-31 17:56:28,363 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 31 [2022-01-31 17:56:28,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:56:28,364 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2022-01-31 17:56:28,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:28,364 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2022-01-31 17:56:28,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-31 17:56:28,365 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:56:28,365 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:56:28,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 17:56:28,365 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:56:28,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:56:28,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1647545759, now seen corresponding path program 5 times [2022-01-31 17:56:28,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:56:28,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [526207816] [2022-01-31 17:56:28,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:56:28,372 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:56:28,372 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:56:28,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:56:28,373 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:56:28,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:28,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:56:28,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:28,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:56:28,519 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:56:28,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [526207816] [2022-01-31 17:56:28,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [526207816] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:56:28,520 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:56:28,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 17:56:28,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157574707] [2022-01-31 17:56:28,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:56:28,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 17:56:28,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:56:28,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 17:56:28,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-31 17:56:28,521 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:28,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:56:28,664 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2022-01-31 17:56:28,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 17:56:28,664 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-01-31 17:56:28,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:56:28,665 INFO L225 Difference]: With dead ends: 69 [2022-01-31 17:56:28,665 INFO L226 Difference]: Without dead ends: 46 [2022-01-31 17:56:28,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2022-01-31 17:56:28,666 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 45 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:56:28,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 36 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:56:28,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-01-31 17:56:28,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2022-01-31 17:56:28,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 38 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:56:28,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2022-01-31 17:56:28,674 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 35 [2022-01-31 17:56:28,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:56:28,674 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2022-01-31 17:56:28,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:28,674 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2022-01-31 17:56:28,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-31 17:56:28,675 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:56:28,675 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:56:28,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 17:56:28,676 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:56:28,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:56:28,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1123002341, now seen corresponding path program 6 times [2022-01-31 17:56:28,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:56:28,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [176888782] [2022-01-31 17:56:28,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:56:28,679 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:56:28,679 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:56:28,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:56:28,680 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:56:28,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:28,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:56:28,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:28,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:56:28,757 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:56:28,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [176888782] [2022-01-31 17:56:28,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [176888782] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:56:28,758 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:56:28,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 17:56:28,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642122287] [2022-01-31 17:56:28,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:56:28,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 17:56:28,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:56:28,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 17:56:28,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-01-31 17:56:28,759 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:28,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:56:28,901 INFO L93 Difference]: Finished difference Result 75 states and 80 transitions. [2022-01-31 17:56:28,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 17:56:28,902 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-01-31 17:56:28,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:56:28,902 INFO L225 Difference]: With dead ends: 75 [2022-01-31 17:56:28,902 INFO L226 Difference]: Without dead ends: 50 [2022-01-31 17:56:28,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2022-01-31 17:56:28,903 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 51 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:56:28,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 36 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:56:28,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-01-31 17:56:28,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2022-01-31 17:56:28,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 42 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:56:28,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2022-01-31 17:56:28,912 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 39 [2022-01-31 17:56:28,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:56:28,912 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2022-01-31 17:56:28,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:28,913 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2022-01-31 17:56:28,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-31 17:56:28,913 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:56:28,914 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:56:28,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 17:56:28,914 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:56:28,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:56:28,914 INFO L85 PathProgramCache]: Analyzing trace with hash -18320233, now seen corresponding path program 7 times [2022-01-31 17:56:28,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:56:28,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1019066819] [2022-01-31 17:56:28,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:56:28,917 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:56:28,917 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:56:28,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:56:28,918 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:56:28,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:29,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:56:29,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:29,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:56:29,016 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:56:29,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1019066819] [2022-01-31 17:56:29,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1019066819] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:56:29,017 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:56:29,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 17:56:29,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699677373] [2022-01-31 17:56:29,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:56:29,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 17:56:29,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:56:29,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 17:56:29,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2022-01-31 17:56:29,018 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:29,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:56:29,211 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2022-01-31 17:56:29,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 17:56:29,211 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 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 43 [2022-01-31 17:56:29,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:56:29,212 INFO L225 Difference]: With dead ends: 81 [2022-01-31 17:56:29,212 INFO L226 Difference]: Without dead ends: 54 [2022-01-31 17:56:29,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2022-01-31 17:56:29,213 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 55 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:56:29,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 36 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:56:29,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-01-31 17:56:29,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2022-01-31 17:56:29,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 46 states have (on average 1.065217391304348) internal successors, (49), 46 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:56:29,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2022-01-31 17:56:29,222 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 43 [2022-01-31 17:56:29,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:56:29,223 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2022-01-31 17:56:29,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:29,223 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2022-01-31 17:56:29,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-31 17:56:29,224 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:56:29,224 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:56:29,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 17:56:29,224 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:56:29,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:56:29,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1111941907, now seen corresponding path program 8 times [2022-01-31 17:56:29,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:56:29,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [230700679] [2022-01-31 17:56:29,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:56:29,227 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:56:29,227 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:56:29,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:56:29,228 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:56:29,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:29,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:56:29,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:29,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:56:29,327 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:56:29,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [230700679] [2022-01-31 17:56:29,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [230700679] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:56:29,328 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:56:29,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 17:56:29,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240217830] [2022-01-31 17:56:29,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:56:29,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 17:56:29,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:56:29,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 17:56:29,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-01-31 17:56:29,329 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:29,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:56:29,548 INFO L93 Difference]: Finished difference Result 87 states and 92 transitions. [2022-01-31 17:56:29,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 17:56:29,549 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 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 47 [2022-01-31 17:56:29,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:56:29,551 INFO L225 Difference]: With dead ends: 87 [2022-01-31 17:56:29,551 INFO L226 Difference]: Without dead ends: 58 [2022-01-31 17:56:29,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2022-01-31 17:56:29,552 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 56 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:56:29,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 51 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:56:29,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-01-31 17:56:29,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2022-01-31 17:56:29,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 50 states have (on average 1.06) internal successors, (53), 50 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:56:29,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2022-01-31 17:56:29,572 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 47 [2022-01-31 17:56:29,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:56:29,574 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2022-01-31 17:56:29,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:29,575 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2022-01-31 17:56:29,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-31 17:56:29,577 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:56:29,577 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:56:29,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 17:56:29,577 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:56:29,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:56:29,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1396089743, now seen corresponding path program 9 times [2022-01-31 17:56:29,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:56:29,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [258203098] [2022-01-31 17:56:29,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:56:29,581 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:56:29,581 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:56:29,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:56:29,583 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:56:29,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:29,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:56:29,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:29,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:56:29,705 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:56:29,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [258203098] [2022-01-31 17:56:29,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [258203098] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:56:29,705 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:56:29,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 17:56:29,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337552952] [2022-01-31 17:56:29,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:56:29,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 17:56:29,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:56:29,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 17:56:29,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2022-01-31 17:56:29,707 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:29,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:56:29,887 INFO L93 Difference]: Finished difference Result 93 states and 98 transitions. [2022-01-31 17:56:29,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 17:56:29,888 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-01-31 17:56:29,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:56:29,888 INFO L225 Difference]: With dead ends: 93 [2022-01-31 17:56:29,888 INFO L226 Difference]: Without dead ends: 62 [2022-01-31 17:56:29,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2022-01-31 17:56:29,889 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 79 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:56:29,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 26 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:56:29,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-01-31 17:56:29,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2022-01-31 17:56:29,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 54 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:56:29,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2022-01-31 17:56:29,898 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 51 [2022-01-31 17:56:29,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:56:29,898 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2022-01-31 17:56:29,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:29,899 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2022-01-31 17:56:29,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-31 17:56:29,899 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:56:29,899 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:56:29,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 17:56:29,900 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:56:29,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:56:29,900 INFO L85 PathProgramCache]: Analyzing trace with hash 792901131, now seen corresponding path program 10 times [2022-01-31 17:56:29,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:56:29,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1658461553] [2022-01-31 17:56:29,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:56:29,902 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:56:29,902 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:56:29,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:56:29,904 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:56:29,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:30,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:56:30,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:30,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:56:30,048 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:56:30,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1658461553] [2022-01-31 17:56:30,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1658461553] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:56:30,048 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:56:30,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 17:56:30,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745929359] [2022-01-31 17:56:30,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:56:30,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 17:56:30,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:56:30,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 17:56:30,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-01-31 17:56:30,050 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:30,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:56:30,292 INFO L93 Difference]: Finished difference Result 99 states and 104 transitions. [2022-01-31 17:56:30,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 17:56:30,292 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-01-31 17:56:30,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:56:30,293 INFO L225 Difference]: With dead ends: 99 [2022-01-31 17:56:30,293 INFO L226 Difference]: Without dead ends: 66 [2022-01-31 17:56:30,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2022-01-31 17:56:30,294 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 76 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:56:30,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 36 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:56:30,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-01-31 17:56:30,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2022-01-31 17:56:30,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 58 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:56:30,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2022-01-31 17:56:30,304 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 55 [2022-01-31 17:56:30,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:56:30,304 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2022-01-31 17:56:30,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:30,304 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2022-01-31 17:56:30,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-31 17:56:30,305 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:56:30,305 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:56:30,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-31 17:56:30,305 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:56:30,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:56:30,306 INFO L85 PathProgramCache]: Analyzing trace with hash -2055857529, now seen corresponding path program 11 times [2022-01-31 17:56:30,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:56:30,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1345558448] [2022-01-31 17:56:30,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:56:30,308 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:56:30,308 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:56:30,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:56:30,309 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:56:30,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:30,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:56:30,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:30,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:56:30,431 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:56:30,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1345558448] [2022-01-31 17:56:30,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1345558448] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:56:30,432 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:56:30,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 17:56:30,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160027284] [2022-01-31 17:56:30,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:56:30,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 17:56:30,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:56:30,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 17:56:30,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2022-01-31 17:56:30,433 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:30,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:56:30,647 INFO L93 Difference]: Finished difference Result 105 states and 110 transitions. [2022-01-31 17:56:30,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 17:56:30,651 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 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 59 [2022-01-31 17:56:30,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:56:30,652 INFO L225 Difference]: With dead ends: 105 [2022-01-31 17:56:30,652 INFO L226 Difference]: Without dead ends: 70 [2022-01-31 17:56:30,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2022-01-31 17:56:30,653 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 94 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:56:30,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 26 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:56:30,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-01-31 17:56:30,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2022-01-31 17:56:30,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 62 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:56:30,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2022-01-31 17:56:30,663 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 59 [2022-01-31 17:56:30,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:56:30,663 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2022-01-31 17:56:30,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:30,666 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2022-01-31 17:56:30,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 17:56:30,667 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:56:30,668 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:56:30,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 17:56:30,668 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:56:30,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:56:30,668 INFO L85 PathProgramCache]: Analyzing trace with hash 911986947, now seen corresponding path program 12 times [2022-01-31 17:56:30,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:56:30,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [572620567] [2022-01-31 17:56:30,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:56:30,672 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:56:30,672 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:56:30,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:56:30,674 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:56:30,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:30,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:56:30,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:30,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:56:30,836 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:56:30,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [572620567] [2022-01-31 17:56:30,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [572620567] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:56:30,837 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:56:30,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 17:56:30,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123674442] [2022-01-31 17:56:30,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:56:30,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 17:56:30,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:56:30,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 17:56:30,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2022-01-31 17:56:30,838 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:31,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:56:31,078 INFO L93 Difference]: Finished difference Result 111 states and 116 transitions. [2022-01-31 17:56:31,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 17:56:31,079 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 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 63 [2022-01-31 17:56:31,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:56:31,079 INFO L225 Difference]: With dead ends: 111 [2022-01-31 17:56:31,079 INFO L226 Difference]: Without dead ends: 74 [2022-01-31 17:56:31,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=315, Invalid=497, Unknown=0, NotChecked=0, Total=812 [2022-01-31 17:56:31,081 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 100 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:56:31,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 31 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:56:31,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-01-31 17:56:31,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2022-01-31 17:56:31,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 66 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:56:31,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2022-01-31 17:56:31,089 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 63 [2022-01-31 17:56:31,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:56:31,090 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2022-01-31 17:56:31,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:31,090 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2022-01-31 17:56:31,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-31 17:56:31,090 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:56:31,090 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:56:31,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-31 17:56:31,091 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:56:31,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:56:31,091 INFO L85 PathProgramCache]: Analyzing trace with hash -738272897, now seen corresponding path program 13 times [2022-01-31 17:56:31,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:56:31,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1429749105] [2022-01-31 17:56:31,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:56:31,094 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:56:31,094 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:56:31,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:56:31,095 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:56:31,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:31,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:56:31,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:31,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:56:31,250 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:56:31,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1429749105] [2022-01-31 17:56:31,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1429749105] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:56:31,250 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:56:31,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 17:56:31,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709200559] [2022-01-31 17:56:31,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:56:31,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 17:56:31,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:56:31,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 17:56:31,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2022-01-31 17:56:31,251 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:31,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:56:31,510 INFO L93 Difference]: Finished difference Result 117 states and 122 transitions. [2022-01-31 17:56:31,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 17:56:31,511 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 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 67 [2022-01-31 17:56:31,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:56:31,512 INFO L225 Difference]: With dead ends: 117 [2022-01-31 17:56:31,512 INFO L226 Difference]: Without dead ends: 78 [2022-01-31 17:56:31,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2022-01-31 17:56:31,513 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 97 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:56:31,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 31 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:56:31,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-01-31 17:56:31,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2022-01-31 17:56:31,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 70 states have (on average 1.042857142857143) internal successors, (73), 70 states have internal predecessors, (73), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:56:31,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2022-01-31 17:56:31,522 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 67 [2022-01-31 17:56:31,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:56:31,522 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2022-01-31 17:56:31,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:31,522 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2022-01-31 17:56:31,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-31 17:56:31,523 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:56:31,523 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:56:31,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-31 17:56:31,523 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:56:31,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:56:31,524 INFO L85 PathProgramCache]: Analyzing trace with hash 568996859, now seen corresponding path program 14 times [2022-01-31 17:56:31,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:56:31,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1152359373] [2022-01-31 17:56:31,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:56:31,526 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:56:31,526 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:56:31,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:56:31,527 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:56:31,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:31,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:56:31,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:31,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:56:31,691 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:56:31,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1152359373] [2022-01-31 17:56:31,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1152359373] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:56:31,691 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:56:31,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 17:56:31,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713492377] [2022-01-31 17:56:31,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:56:31,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 17:56:31,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:56:31,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 17:56:31,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-01-31 17:56:31,692 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:31,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:56:31,983 INFO L93 Difference]: Finished difference Result 123 states and 128 transitions. [2022-01-31 17:56:31,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 17:56:31,984 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2022-01-31 17:56:31,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:56:31,984 INFO L225 Difference]: With dead ends: 123 [2022-01-31 17:56:31,985 INFO L226 Difference]: Without dead ends: 82 [2022-01-31 17:56:31,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=408, Invalid=648, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 17:56:31,991 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 100 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:56:31,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 41 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:56:31,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-01-31 17:56:31,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2022-01-31 17:56:32,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 74 states have internal predecessors, (77), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:56:32,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2022-01-31 17:56:32,005 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 71 [2022-01-31 17:56:32,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:56:32,006 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2022-01-31 17:56:32,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:32,006 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2022-01-31 17:56:32,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-31 17:56:32,009 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:56:32,009 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:56:32,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-31 17:56:32,009 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:56:32,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:56:32,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1792483209, now seen corresponding path program 15 times [2022-01-31 17:56:32,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:56:32,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [29016900] [2022-01-31 17:56:32,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:56:32,012 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:56:32,013 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:56:32,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:56:32,015 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:56:32,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:32,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:56:32,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:32,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:56:32,199 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:56:32,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [29016900] [2022-01-31 17:56:32,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [29016900] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:56:32,200 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:56:32,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 17:56:32,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363023706] [2022-01-31 17:56:32,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:56:32,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 17:56:32,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:56:32,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 17:56:32,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2022-01-31 17:56:32,201 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:32,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:56:32,501 INFO L93 Difference]: Finished difference Result 129 states and 134 transitions. [2022-01-31 17:56:32,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 17:56:32,502 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2022-01-31 17:56:32,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:56:32,502 INFO L225 Difference]: With dead ends: 129 [2022-01-31 17:56:32,503 INFO L226 Difference]: Without dead ends: 86 [2022-01-31 17:56:32,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 17:56:32,504 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 97 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:56:32,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 46 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:56:32,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-01-31 17:56:32,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2022-01-31 17:56:32,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 78 states have (on average 1.0384615384615385) internal successors, (81), 78 states have internal predecessors, (81), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:56:32,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2022-01-31 17:56:32,514 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 75 [2022-01-31 17:56:32,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:56:32,514 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2022-01-31 17:56:32,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:32,514 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2022-01-31 17:56:32,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-31 17:56:32,515 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:56:32,515 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:56:32,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-31 17:56:32,515 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:56:32,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:56:32,516 INFO L85 PathProgramCache]: Analyzing trace with hash -733618445, now seen corresponding path program 16 times [2022-01-31 17:56:32,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:56:32,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [722732723] [2022-01-31 17:56:32,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:56:32,518 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:56:32,518 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:56:32,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:56:32,519 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:56:32,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:32,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:56:32,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:32,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:56:32,720 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:56:32,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [722732723] [2022-01-31 17:56:32,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [722732723] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:56:32,720 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:56:32,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 17:56:32,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234237570] [2022-01-31 17:56:32,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:56:32,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 17:56:32,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:56:32,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 17:56:32,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2022-01-31 17:56:32,722 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:33,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:56:33,028 INFO L93 Difference]: Finished difference Result 135 states and 140 transitions. [2022-01-31 17:56:33,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 17:56:33,028 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 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 79 [2022-01-31 17:56:33,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:56:33,029 INFO L225 Difference]: With dead ends: 135 [2022-01-31 17:56:33,029 INFO L226 Difference]: Without dead ends: 90 [2022-01-31 17:56:33,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=513, Invalid=819, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 17:56:33,030 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 116 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:56:33,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 36 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:56:33,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-01-31 17:56:33,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2022-01-31 17:56:33,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 82 states have (on average 1.0365853658536586) internal successors, (85), 82 states have internal predecessors, (85), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:56:33,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2022-01-31 17:56:33,041 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 79 [2022-01-31 17:56:33,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:56:33,041 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2022-01-31 17:56:33,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:33,041 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2022-01-31 17:56:33,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-31 17:56:33,042 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:56:33,042 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:56:33,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-31 17:56:33,042 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:56:33,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:56:33,043 INFO L85 PathProgramCache]: Analyzing trace with hash 927739759, now seen corresponding path program 17 times [2022-01-31 17:56:33,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:56:33,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1657587808] [2022-01-31 17:56:33,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:56:33,045 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:56:33,045 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:56:33,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:56:33,046 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:56:33,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:33,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:56:33,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:33,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:56:33,268 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:56:33,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1657587808] [2022-01-31 17:56:33,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1657587808] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:56:33,268 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:56:33,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 17:56:33,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388464180] [2022-01-31 17:56:33,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:56:33,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 17:56:33,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:56:33,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 17:56:33,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2022-01-31 17:56:33,270 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:33,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:56:33,592 INFO L93 Difference]: Finished difference Result 141 states and 146 transitions. [2022-01-31 17:56:33,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 17:56:33,592 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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 83 [2022-01-31 17:56:33,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:56:33,593 INFO L225 Difference]: With dead ends: 141 [2022-01-31 17:56:33,593 INFO L226 Difference]: Without dead ends: 94 [2022-01-31 17:56:33,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=570, Invalid=912, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 17:56:33,594 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 118 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:56:33,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 41 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:56:33,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-01-31 17:56:33,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2022-01-31 17:56:33,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 86 states have (on average 1.0348837209302326) internal successors, (89), 86 states have internal predecessors, (89), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:56:33,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2022-01-31 17:56:33,611 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 83 [2022-01-31 17:56:33,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:56:33,611 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2022-01-31 17:56:33,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:33,612 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2022-01-31 17:56:33,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-01-31 17:56:33,612 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:56:33,612 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:56:33,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-31 17:56:33,613 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:56:33,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:56:33,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1204212203, now seen corresponding path program 18 times [2022-01-31 17:56:33,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:56:33,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [47334091] [2022-01-31 17:56:33,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:56:33,616 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:56:33,616 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:56:33,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:56:33,618 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:56:33,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:33,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:56:33,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:33,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:56:33,856 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:56:33,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [47334091] [2022-01-31 17:56:33,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [47334091] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:56:33,856 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:56:33,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 17:56:33,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097955061] [2022-01-31 17:56:33,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:56:33,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 17:56:33,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:56:33,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 17:56:33,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2022-01-31 17:56:33,857 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:34,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:56:34,244 INFO L93 Difference]: Finished difference Result 147 states and 152 transitions. [2022-01-31 17:56:34,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 17:56:34,245 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 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 87 [2022-01-31 17:56:34,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:56:34,245 INFO L225 Difference]: With dead ends: 147 [2022-01-31 17:56:34,246 INFO L226 Difference]: Without dead ends: 98 [2022-01-31 17:56:34,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 17:56:34,247 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 116 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:56:34,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 46 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:56:34,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-01-31 17:56:34,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2022-01-31 17:56:34,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 90 states have (on average 1.0333333333333334) internal successors, (93), 90 states have internal predecessors, (93), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:56:34,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2022-01-31 17:56:34,259 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 87 [2022-01-31 17:56:34,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:56:34,259 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2022-01-31 17:56:34,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:34,259 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2022-01-31 17:56:34,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-01-31 17:56:34,260 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:56:34,260 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:56:34,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-31 17:56:34,260 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:56:34,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:56:34,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1086375527, now seen corresponding path program 19 times [2022-01-31 17:56:34,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:56:34,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1314671365] [2022-01-31 17:56:34,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:56:34,263 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:56:34,263 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:56:34,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:56:34,264 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:56:34,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:34,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:56:34,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:34,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:56:34,510 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:56:34,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1314671365] [2022-01-31 17:56:34,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1314671365] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:56:34,510 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:56:34,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 17:56:34,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101770272] [2022-01-31 17:56:34,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:56:34,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 17:56:34,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:56:34,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 17:56:34,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2022-01-31 17:56:34,512 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:34,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:56:34,900 INFO L93 Difference]: Finished difference Result 153 states and 158 transitions. [2022-01-31 17:56:34,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 17:56:34,900 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 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 91 [2022-01-31 17:56:34,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:56:34,901 INFO L225 Difference]: With dead ends: 153 [2022-01-31 17:56:34,901 INFO L226 Difference]: Without dead ends: 102 [2022-01-31 17:56:34,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=693, Invalid=1113, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 17:56:34,902 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 144 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:56:34,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 31 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:56:34,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-01-31 17:56:34,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2022-01-31 17:56:34,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 94 states have (on average 1.0319148936170213) internal successors, (97), 94 states have internal predecessors, (97), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:56:34,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2022-01-31 17:56:34,916 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 91 [2022-01-31 17:56:34,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:56:34,916 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2022-01-31 17:56:34,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:34,916 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2022-01-31 17:56:34,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-01-31 17:56:34,917 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:56:34,917 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:56:34,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-31 17:56:34,917 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:56:34,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:56:34,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1899688733, now seen corresponding path program 20 times [2022-01-31 17:56:34,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:56:34,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1103330645] [2022-01-31 17:56:34,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:56:34,921 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:56:34,921 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:56:34,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:56:34,924 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:56:34,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:35,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:56:35,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:35,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:56:35,202 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:56:35,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1103330645] [2022-01-31 17:56:35,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1103330645] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:56:35,202 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:56:35,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 17:56:35,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787866562] [2022-01-31 17:56:35,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:56:35,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 17:56:35,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:56:35,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 17:56:35,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2022-01-31 17:56:35,204 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:35,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:56:35,615 INFO L93 Difference]: Finished difference Result 159 states and 164 transitions. [2022-01-31 17:56:35,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 17:56:35,616 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2022-01-31 17:56:35,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:56:35,616 INFO L225 Difference]: With dead ends: 159 [2022-01-31 17:56:35,616 INFO L226 Difference]: Without dead ends: 106 [2022-01-31 17:56:35,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=759, Invalid=1221, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 17:56:35,618 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 133 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:56:35,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 36 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:56:35,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-01-31 17:56:35,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 104. [2022-01-31 17:56:35,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 98 states have (on average 1.030612244897959) internal successors, (101), 98 states have internal predecessors, (101), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:56:35,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2022-01-31 17:56:35,631 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 95 [2022-01-31 17:56:35,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:56:35,631 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2022-01-31 17:56:35,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:35,631 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2022-01-31 17:56:35,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-01-31 17:56:35,632 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:56:35,632 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:56:35,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-31 17:56:35,632 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:56:35,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:56:35,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1339991391, now seen corresponding path program 21 times [2022-01-31 17:56:35,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:56:35,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1453861962] [2022-01-31 17:56:35,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:56:35,635 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:56:35,635 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:56:35,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:56:35,636 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:56:35,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:35,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:56:35,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:35,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:56:35,925 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:56:35,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1453861962] [2022-01-31 17:56:35,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1453861962] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:56:35,925 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:56:35,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 17:56:35,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725301113] [2022-01-31 17:56:35,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:56:35,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 17:56:35,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:56:35,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 17:56:35,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2022-01-31 17:56:35,926 INFO L87 Difference]: Start difference. First operand 104 states and 106 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:36,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:56:36,387 INFO L93 Difference]: Finished difference Result 165 states and 170 transitions. [2022-01-31 17:56:36,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 17:56:36,387 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 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 99 [2022-01-31 17:56:36,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:56:36,388 INFO L225 Difference]: With dead ends: 165 [2022-01-31 17:56:36,388 INFO L226 Difference]: Without dead ends: 110 [2022-01-31 17:56:36,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=828, Invalid=1334, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 17:56:36,394 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 149 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:56:36,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 46 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:56:36,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-01-31 17:56:36,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 108. [2022-01-31 17:56:36,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 102 states have (on average 1.0294117647058822) internal successors, (105), 102 states have internal predecessors, (105), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:56:36,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2022-01-31 17:56:36,407 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 99 [2022-01-31 17:56:36,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:56:36,407 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2022-01-31 17:56:36,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:36,408 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2022-01-31 17:56:36,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-01-31 17:56:36,408 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:56:36,408 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:56:36,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-31 17:56:36,409 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:56:36,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:56:36,409 INFO L85 PathProgramCache]: Analyzing trace with hash -744976421, now seen corresponding path program 22 times [2022-01-31 17:56:36,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:56:36,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [561171899] [2022-01-31 17:56:36,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:56:36,411 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:56:36,411 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:56:36,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:56:36,413 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:56:36,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:36,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:56:36,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:36,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:56:36,734 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:56:36,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [561171899] [2022-01-31 17:56:36,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [561171899] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:56:36,734 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:56:36,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 17:56:36,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639632282] [2022-01-31 17:56:36,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:56:36,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 17:56:36,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:56:36,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 17:56:36,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-01-31 17:56:36,736 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:37,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:56:37,227 INFO L93 Difference]: Finished difference Result 171 states and 176 transitions. [2022-01-31 17:56:37,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 17:56:37,231 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 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 103 [2022-01-31 17:56:37,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:56:37,232 INFO L225 Difference]: With dead ends: 171 [2022-01-31 17:56:37,232 INFO L226 Difference]: Without dead ends: 114 [2022-01-31 17:56:37,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=900, Invalid=1452, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 17:56:37,233 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 141 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:56:37,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 46 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:56:37,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-01-31 17:56:37,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2022-01-31 17:56:37,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 106 states have (on average 1.028301886792453) internal successors, (109), 106 states have internal predecessors, (109), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:56:37,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2022-01-31 17:56:37,248 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 103 [2022-01-31 17:56:37,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:56:37,249 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2022-01-31 17:56:37,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:37,249 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2022-01-31 17:56:37,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-01-31 17:56:37,250 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:56:37,250 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:56:37,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-31 17:56:37,250 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:56:37,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:56:37,250 INFO L85 PathProgramCache]: Analyzing trace with hash 452840535, now seen corresponding path program 23 times [2022-01-31 17:56:37,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:56:37,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1806181414] [2022-01-31 17:56:37,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:56:37,254 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:56:37,254 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:56:37,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:56:37,257 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:56:37,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:37,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:56:37,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:37,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:56:37,569 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:56:37,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1806181414] [2022-01-31 17:56:37,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1806181414] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:56:37,569 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:56:37,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 17:56:37,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97844457] [2022-01-31 17:56:37,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:56:37,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 17:56:37,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:56:37,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 17:56:37,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2022-01-31 17:56:37,571 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:38,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:56:38,089 INFO L93 Difference]: Finished difference Result 177 states and 182 transitions. [2022-01-31 17:56:38,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 17:56:38,089 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 107 [2022-01-31 17:56:38,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:56:38,090 INFO L225 Difference]: With dead ends: 177 [2022-01-31 17:56:38,090 INFO L226 Difference]: Without dead ends: 118 [2022-01-31 17:56:38,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=975, Invalid=1575, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 17:56:38,091 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 157 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:56:38,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 36 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:56:38,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-01-31 17:56:38,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 116. [2022-01-31 17:56:38,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 110 states have (on average 1.0272727272727273) internal successors, (113), 110 states have internal predecessors, (113), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:56:38,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 118 transitions. [2022-01-31 17:56:38,113 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 118 transitions. Word has length 107 [2022-01-31 17:56:38,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:56:38,113 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 118 transitions. [2022-01-31 17:56:38,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:38,114 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 118 transitions. [2022-01-31 17:56:38,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-01-31 17:56:38,115 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:56:38,115 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:56:38,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-31 17:56:38,115 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:56:38,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:56:38,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1486445267, now seen corresponding path program 24 times [2022-01-31 17:56:38,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:56:38,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1847985626] [2022-01-31 17:56:38,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:56:38,118 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:56:38,118 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:56:38,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:56:38,121 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:56:38,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:38,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:56:38,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:38,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:56:38,477 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:56:38,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1847985626] [2022-01-31 17:56:38,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1847985626] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:56:38,478 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:56:38,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 17:56:38,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328750951] [2022-01-31 17:56:38,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:56:38,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 17:56:38,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:56:38,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 17:56:38,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2022-01-31 17:56:38,479 INFO L87 Difference]: Start difference. First operand 116 states and 118 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:39,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:56:39,011 INFO L93 Difference]: Finished difference Result 183 states and 188 transitions. [2022-01-31 17:56:39,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 17:56:39,011 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 111 [2022-01-31 17:56:39,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:56:39,012 INFO L225 Difference]: With dead ends: 183 [2022-01-31 17:56:39,012 INFO L226 Difference]: Without dead ends: 122 [2022-01-31 17:56:39,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1053, Invalid=1703, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 17:56:39,013 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 166 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:56:39,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 31 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:56:39,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-01-31 17:56:39,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 120. [2022-01-31 17:56:39,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 114 states have (on average 1.0263157894736843) internal successors, (117), 114 states have internal predecessors, (117), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:56:39,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 122 transitions. [2022-01-31 17:56:39,031 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 122 transitions. Word has length 111 [2022-01-31 17:56:39,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:56:39,031 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 122 transitions. [2022-01-31 17:56:39,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:39,031 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 122 transitions. [2022-01-31 17:56:39,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-01-31 17:56:39,032 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:56:39,032 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:56:39,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-01-31 17:56:39,032 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:56:39,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:56:39,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1886796623, now seen corresponding path program 25 times [2022-01-31 17:56:39,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:56:39,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [687780981] [2022-01-31 17:56:39,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:56:39,035 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:56:39,035 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:56:39,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:56:39,037 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:56:39,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:39,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:56:39,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:39,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:56:39,369 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:56:39,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [687780981] [2022-01-31 17:56:39,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [687780981] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:56:39,369 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:56:39,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 17:56:39,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086766309] [2022-01-31 17:56:39,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:56:39,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 17:56:39,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:56:39,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 17:56:39,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2022-01-31 17:56:39,370 INFO L87 Difference]: Start difference. First operand 120 states and 122 transitions. Second operand has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:39,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:56:39,849 INFO L93 Difference]: Finished difference Result 189 states and 194 transitions. [2022-01-31 17:56:39,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 17:56:39,849 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 115 [2022-01-31 17:56:39,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:56:39,850 INFO L225 Difference]: With dead ends: 189 [2022-01-31 17:56:39,850 INFO L226 Difference]: Without dead ends: 126 [2022-01-31 17:56:39,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1134, Invalid=1836, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 17:56:39,853 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 190 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:56:39,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 26 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:56:39,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-01-31 17:56:39,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 124. [2022-01-31 17:56:39,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 118 states have (on average 1.0254237288135593) internal successors, (121), 118 states have internal predecessors, (121), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:56:39,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 126 transitions. [2022-01-31 17:56:39,872 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 126 transitions. Word has length 115 [2022-01-31 17:56:39,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:56:39,872 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 126 transitions. [2022-01-31 17:56:39,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:39,873 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 126 transitions. [2022-01-31 17:56:39,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-01-31 17:56:39,873 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:56:39,873 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:56:39,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-01-31 17:56:39,874 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:56:39,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:56:39,875 INFO L85 PathProgramCache]: Analyzing trace with hash 2015325643, now seen corresponding path program 26 times [2022-01-31 17:56:39,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:56:39,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2059305533] [2022-01-31 17:56:39,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:56:39,877 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:56:39,877 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:56:39,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:56:39,879 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:56:39,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:40,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:56:40,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:40,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:56:40,269 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:56:40,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2059305533] [2022-01-31 17:56:40,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2059305533] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:56:40,270 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:56:40,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 17:56:40,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638560200] [2022-01-31 17:56:40,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:56:40,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 17:56:40,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:56:40,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 17:56:40,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2022-01-31 17:56:40,271 INFO L87 Difference]: Start difference. First operand 124 states and 126 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:40,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:56:40,775 INFO L93 Difference]: Finished difference Result 195 states and 200 transitions. [2022-01-31 17:56:40,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 17:56:40,776 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 119 [2022-01-31 17:56:40,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:56:40,777 INFO L225 Difference]: With dead ends: 195 [2022-01-31 17:56:40,777 INFO L226 Difference]: Without dead ends: 130 [2022-01-31 17:56:40,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1218, Invalid=1974, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 17:56:40,778 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 178 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:56:40,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 41 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:56:40,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-01-31 17:56:40,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 128. [2022-01-31 17:56:40,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 122 states have (on average 1.0245901639344261) internal successors, (125), 122 states have internal predecessors, (125), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:56:40,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 130 transitions. [2022-01-31 17:56:40,797 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 130 transitions. Word has length 119 [2022-01-31 17:56:40,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:56:40,797 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 130 transitions. [2022-01-31 17:56:40,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:40,797 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 130 transitions. [2022-01-31 17:56:40,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-01-31 17:56:40,798 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:56:40,798 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:56:40,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-01-31 17:56:40,798 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:56:40,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:56:40,799 INFO L85 PathProgramCache]: Analyzing trace with hash 916451911, now seen corresponding path program 27 times [2022-01-31 17:56:40,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:56:40,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [451683427] [2022-01-31 17:56:40,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:56:40,801 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:56:40,801 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:56:40,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:56:40,803 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:56:40,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:41,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:56:41,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:41,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:56:41,173 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:56:41,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [451683427] [2022-01-31 17:56:41,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [451683427] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:56:41,173 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:56:41,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 17:56:41,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237492192] [2022-01-31 17:56:41,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:56:41,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 17:56:41,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:56:41,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 17:56:41,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2022-01-31 17:56:41,175 INFO L87 Difference]: Start difference. First operand 128 states and 130 transitions. Second operand has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 30 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:41,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:56:41,710 INFO L93 Difference]: Finished difference Result 201 states and 206 transitions. [2022-01-31 17:56:41,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 17:56:41,710 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 30 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 123 [2022-01-31 17:56:41,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:56:41,711 INFO L225 Difference]: With dead ends: 201 [2022-01-31 17:56:41,711 INFO L226 Difference]: Without dead ends: 134 [2022-01-31 17:56:41,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1305, Invalid=2117, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 17:56:41,712 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 172 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:56:41,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 56 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:56:41,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-01-31 17:56:41,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 132. [2022-01-31 17:56:41,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 126 states have (on average 1.0238095238095237) internal successors, (129), 126 states have internal predecessors, (129), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:56:41,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 134 transitions. [2022-01-31 17:56:41,732 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 134 transitions. Word has length 123 [2022-01-31 17:56:41,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:56:41,732 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 134 transitions. [2022-01-31 17:56:41,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 30 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:41,733 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 134 transitions. [2022-01-31 17:56:41,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-01-31 17:56:41,733 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:56:41,733 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:56:41,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-01-31 17:56:41,734 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:56:41,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:56:41,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1534932797, now seen corresponding path program 28 times [2022-01-31 17:56:41,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:56:41,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1595871834] [2022-01-31 17:56:41,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:56:41,736 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:56:41,736 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:56:41,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:56:41,738 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:56:41,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:42,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:56:42,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:42,164 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 17:56:42,164 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:56:42,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1595871834] [2022-01-31 17:56:42,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1595871834] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:56:42,164 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:56:42,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 17:56:42,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801179040] [2022-01-31 17:56:42,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:56:42,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 17:56:42,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:56:42,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 17:56:42,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2022-01-31 17:56:42,165 INFO L87 Difference]: Start difference. First operand 132 states and 134 transitions. Second operand has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:42,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:56:42,795 INFO L93 Difference]: Finished difference Result 207 states and 212 transitions. [2022-01-31 17:56:42,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 17:56:42,795 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 127 [2022-01-31 17:56:42,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:56:42,796 INFO L225 Difference]: With dead ends: 207 [2022-01-31 17:56:42,796 INFO L226 Difference]: Without dead ends: 138 [2022-01-31 17:56:42,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1395, Invalid=2265, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 17:56:42,798 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 189 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:56:42,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 46 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:56:42,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-01-31 17:56:42,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2022-01-31 17:56:42,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 130 states have (on average 1.023076923076923) internal successors, (133), 130 states have internal predecessors, (133), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:56:42,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 138 transitions. [2022-01-31 17:56:42,817 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 138 transitions. Word has length 127 [2022-01-31 17:56:42,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:56:42,817 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 138 transitions. [2022-01-31 17:56:42,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:42,817 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 138 transitions. [2022-01-31 17:56:42,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-01-31 17:56:42,818 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:56:42,818 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:56:42,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-01-31 17:56:42,818 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:56:42,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:56:42,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1808986431, now seen corresponding path program 29 times [2022-01-31 17:56:42,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:56:42,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [124613630] [2022-01-31 17:56:42,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:56:42,821 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:56:42,821 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:56:42,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:56:42,823 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:56:42,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:43,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:56:43,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:43,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:56:43,241 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:56:43,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [124613630] [2022-01-31 17:56:43,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [124613630] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:56:43,241 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:56:43,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 17:56:43,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959884378] [2022-01-31 17:56:43,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:56:43,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 17:56:43,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:56:43,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 17:56:43,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 17:56:43,242 INFO L87 Difference]: Start difference. First operand 136 states and 138 transitions. Second operand has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:43,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:56:43,930 INFO L93 Difference]: Finished difference Result 213 states and 218 transitions. [2022-01-31 17:56:43,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 17:56:43,931 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 131 [2022-01-31 17:56:43,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:56:43,932 INFO L225 Difference]: With dead ends: 213 [2022-01-31 17:56:43,932 INFO L226 Difference]: Without dead ends: 142 [2022-01-31 17:56:43,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1488, Invalid=2418, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 17:56:43,933 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 197 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:56:43,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 46 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:56:43,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-01-31 17:56:43,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 140. [2022-01-31 17:56:43,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 134 states have (on average 1.0223880597014925) internal successors, (137), 134 states have internal predecessors, (137), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:56:43,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 142 transitions. [2022-01-31 17:56:43,956 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 142 transitions. Word has length 131 [2022-01-31 17:56:43,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:56:43,956 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 142 transitions. [2022-01-31 17:56:43,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:43,956 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 142 transitions. [2022-01-31 17:56:43,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-01-31 17:56:43,957 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:56:43,957 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:56:43,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-01-31 17:56:43,957 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:56:43,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:56:43,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1746627515, now seen corresponding path program 30 times [2022-01-31 17:56:43,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:56:43,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [600575107] [2022-01-31 17:56:43,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:56:43,960 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:56:43,960 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:56:43,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:56:43,963 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:56:43,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:44,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:56:44,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:44,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:56:44,373 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:56:44,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [600575107] [2022-01-31 17:56:44,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [600575107] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:56:44,373 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:56:44,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 17:56:44,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037898236] [2022-01-31 17:56:44,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:56:44,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 17:56:44,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:56:44,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 17:56:44,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 17:56:44,374 INFO L87 Difference]: Start difference. First operand 140 states and 142 transitions. Second operand has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:44,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:56:44,979 INFO L93 Difference]: Finished difference Result 219 states and 224 transitions. [2022-01-31 17:56:44,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 17:56:44,980 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 135 [2022-01-31 17:56:44,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:56:44,981 INFO L225 Difference]: With dead ends: 219 [2022-01-31 17:56:44,981 INFO L226 Difference]: Without dead ends: 146 [2022-01-31 17:56:44,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1584, Invalid=2576, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 17:56:44,982 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 209 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:56:44,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 41 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:56:44,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-01-31 17:56:45,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 144. [2022-01-31 17:56:45,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 138 states have (on average 1.0217391304347827) internal successors, (141), 138 states have internal predecessors, (141), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:56:45,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 146 transitions. [2022-01-31 17:56:45,007 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 146 transitions. Word has length 135 [2022-01-31 17:56:45,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:56:45,007 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 146 transitions. [2022-01-31 17:56:45,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:45,007 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 146 transitions. [2022-01-31 17:56:45,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-01-31 17:56:45,008 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:56:45,008 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:56:45,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-01-31 17:56:45,008 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:56:45,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:56:45,009 INFO L85 PathProgramCache]: Analyzing trace with hash 644298807, now seen corresponding path program 31 times [2022-01-31 17:56:45,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:56:45,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [894905978] [2022-01-31 17:56:45,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:56:45,011 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:56:45,011 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:56:45,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:56:45,013 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:56:45,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:45,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:56:45,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:45,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:56:45,524 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:56:45,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [894905978] [2022-01-31 17:56:45,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [894905978] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:56:45,524 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:56:45,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 17:56:45,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150592178] [2022-01-31 17:56:45,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:56:45,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 17:56:45,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:56:45,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 17:56:45,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 17:56:45,526 INFO L87 Difference]: Start difference. First operand 144 states and 146 transitions. Second operand has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 34 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:46,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:56:46,237 INFO L93 Difference]: Finished difference Result 225 states and 230 transitions. [2022-01-31 17:56:46,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 17:56:46,238 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 34 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 139 [2022-01-31 17:56:46,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:56:46,239 INFO L225 Difference]: With dead ends: 225 [2022-01-31 17:56:46,239 INFO L226 Difference]: Without dead ends: 150 [2022-01-31 17:56:46,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1683, Invalid=2739, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 17:56:46,240 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 200 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:56:46,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 41 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:56:46,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-01-31 17:56:46,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 148. [2022-01-31 17:56:46,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 142 states have (on average 1.0211267605633803) internal successors, (145), 142 states have internal predecessors, (145), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:56:46,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 150 transitions. [2022-01-31 17:56:46,265 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 150 transitions. Word has length 139 [2022-01-31 17:56:46,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:56:46,265 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 150 transitions. [2022-01-31 17:56:46,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 34 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:46,265 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 150 transitions. [2022-01-31 17:56:46,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-01-31 17:56:46,266 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:56:46,266 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:56:46,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-01-31 17:56:46,266 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:56:46,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:56:46,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1698780851, now seen corresponding path program 32 times [2022-01-31 17:56:46,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:56:46,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [116426151] [2022-01-31 17:56:46,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:56:46,269 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:56:46,269 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:56:46,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:56:46,271 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:56:46,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:46,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:56:46,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:46,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:56:46,779 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:56:46,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [116426151] [2022-01-31 17:56:46,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [116426151] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:56:46,779 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:56:46,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 17:56:46,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895742524] [2022-01-31 17:56:46,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:56:46,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 17:56:46,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:56:46,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 17:56:46,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 17:56:46,780 INFO L87 Difference]: Start difference. First operand 148 states and 150 transitions. Second operand has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:47,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:56:47,519 INFO L93 Difference]: Finished difference Result 231 states and 236 transitions. [2022-01-31 17:56:47,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 17:56:47,519 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2022-01-31 17:56:47,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:56:47,520 INFO L225 Difference]: With dead ends: 231 [2022-01-31 17:56:47,520 INFO L226 Difference]: Without dead ends: 154 [2022-01-31 17:56:47,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1785, Invalid=2907, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 17:56:47,521 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 240 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:56:47,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 26 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:56:47,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-01-31 17:56:47,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 152. [2022-01-31 17:56:47,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 146 states have (on average 1.0205479452054795) internal successors, (149), 146 states have internal predecessors, (149), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:56:47,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 154 transitions. [2022-01-31 17:56:47,547 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 154 transitions. Word has length 143 [2022-01-31 17:56:47,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:56:47,547 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 154 transitions. [2022-01-31 17:56:47,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:47,548 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 154 transitions. [2022-01-31 17:56:47,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-01-31 17:56:47,548 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:56:47,548 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:56:47,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-01-31 17:56:47,549 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:56:47,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:56:47,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1800091857, now seen corresponding path program 33 times [2022-01-31 17:56:47,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:56:47,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [917452870] [2022-01-31 17:56:47,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:56:47,551 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:56:47,551 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:56:47,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:56:47,554 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:56:47,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:48,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:56:48,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:48,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:56:48,089 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:56:48,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [917452870] [2022-01-31 17:56:48,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [917452870] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:56:48,089 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:56:48,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 17:56:48,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714971328] [2022-01-31 17:56:48,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:56:48,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 17:56:48,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:56:48,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 17:56:48,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 17:56:48,090 INFO L87 Difference]: Start difference. First operand 152 states and 154 transitions. Second operand has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:48,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:56:48,853 INFO L93 Difference]: Finished difference Result 237 states and 242 transitions. [2022-01-31 17:56:48,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 17:56:48,853 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 147 [2022-01-31 17:56:48,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:56:48,854 INFO L225 Difference]: With dead ends: 237 [2022-01-31 17:56:48,854 INFO L226 Difference]: Without dead ends: 158 [2022-01-31 17:56:48,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1890, Invalid=3080, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 17:56:48,855 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 212 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:56:48,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 46 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:56:48,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-01-31 17:56:48,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 156. [2022-01-31 17:56:48,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 150 states have (on average 1.02) internal successors, (153), 150 states have internal predecessors, (153), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:56:48,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 158 transitions. [2022-01-31 17:56:48,881 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 158 transitions. Word has length 147 [2022-01-31 17:56:48,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:56:48,881 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 158 transitions. [2022-01-31 17:56:48,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:48,882 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 158 transitions. [2022-01-31 17:56:48,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-01-31 17:56:48,882 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:56:48,882 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:56:48,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-01-31 17:56:48,883 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:56:48,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:56:48,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1447856555, now seen corresponding path program 34 times [2022-01-31 17:56:48,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:56:48,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [65638145] [2022-01-31 17:56:48,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:56:48,885 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:56:48,885 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:56:48,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:56:48,888 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:56:48,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:49,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:56:49,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:49,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:56:49,465 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:56:49,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [65638145] [2022-01-31 17:56:49,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [65638145] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:56:49,465 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:56:49,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 17:56:49,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301646480] [2022-01-31 17:56:49,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:56:49,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 17:56:49,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:56:49,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 17:56:49,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 17:56:49,467 INFO L87 Difference]: Start difference. First operand 156 states and 158 transitions. Second operand has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 37 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:50,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:56:50,234 INFO L93 Difference]: Finished difference Result 243 states and 248 transitions. [2022-01-31 17:56:50,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 17:56:50,235 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 37 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 151 [2022-01-31 17:56:50,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:56:50,236 INFO L225 Difference]: With dead ends: 243 [2022-01-31 17:56:50,236 INFO L226 Difference]: Without dead ends: 162 [2022-01-31 17:56:50,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1998, Invalid=3258, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 17:56:50,237 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 271 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:56:50,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 31 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:56:50,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-01-31 17:56:50,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 160. [2022-01-31 17:56:50,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 154 states have (on average 1.0194805194805194) internal successors, (157), 154 states have internal predecessors, (157), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:56:50,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 162 transitions. [2022-01-31 17:56:50,257 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 162 transitions. Word has length 151 [2022-01-31 17:56:50,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:56:50,257 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 162 transitions. [2022-01-31 17:56:50,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 37 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:50,257 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 162 transitions. [2022-01-31 17:56:50,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-01-31 17:56:50,258 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:56:50,258 INFO L514 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:56:50,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-01-31 17:56:50,258 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:56:50,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:56:50,259 INFO L85 PathProgramCache]: Analyzing trace with hash -49045977, now seen corresponding path program 35 times [2022-01-31 17:56:50,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:56:50,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [444197373] [2022-01-31 17:56:50,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:56:50,261 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:56:50,261 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:56:50,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:56:50,264 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:56:50,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:50,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:56:50,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:50,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:56:50,808 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:56:50,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [444197373] [2022-01-31 17:56:50,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [444197373] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:56:50,808 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:56:50,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-01-31 17:56:50,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816993464] [2022-01-31 17:56:50,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:56:50,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 17:56:50,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:56:50,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 17:56:50,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 17:56:50,810 INFO L87 Difference]: Start difference. First operand 160 states and 162 transitions. Second operand has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 38 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:51,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:56:51,644 INFO L93 Difference]: Finished difference Result 249 states and 254 transitions. [2022-01-31 17:56:51,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 17:56:51,644 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 38 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 155 [2022-01-31 17:56:51,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:56:51,645 INFO L225 Difference]: With dead ends: 249 [2022-01-31 17:56:51,645 INFO L226 Difference]: Without dead ends: 166 [2022-01-31 17:56:51,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2109, Invalid=3441, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 17:56:51,646 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 242 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:56:51,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 56 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:56:51,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-01-31 17:56:51,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 164. [2022-01-31 17:56:51,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 158 states have (on average 1.018987341772152) internal successors, (161), 158 states have internal predecessors, (161), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:56:51,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 166 transitions. [2022-01-31 17:56:51,676 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 166 transitions. Word has length 155 [2022-01-31 17:56:51,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:56:51,676 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 166 transitions. [2022-01-31 17:56:51,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 38 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:51,677 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 166 transitions. [2022-01-31 17:56:51,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-01-31 17:56:51,677 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:56:51,677 INFO L514 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:56:51,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-01-31 17:56:51,678 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:56:51,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:56:51,678 INFO L85 PathProgramCache]: Analyzing trace with hash 227869859, now seen corresponding path program 36 times [2022-01-31 17:56:51,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:56:51,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [575035890] [2022-01-31 17:56:51,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:56:51,685 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:56:51,685 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:56:51,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:56:51,688 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:56:51,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:52,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:56:52,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:52,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:56:52,304 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:56:52,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [575035890] [2022-01-31 17:56:52,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [575035890] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:56:52,304 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:56:52,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-01-31 17:56:52,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670463000] [2022-01-31 17:56:52,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:56:52,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 17:56:52,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:56:52,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 17:56:52,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 17:56:52,306 INFO L87 Difference]: Start difference. First operand 164 states and 166 transitions. Second operand has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:53,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:56:53,112 INFO L93 Difference]: Finished difference Result 255 states and 260 transitions. [2022-01-31 17:56:53,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 17:56:53,113 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 159 [2022-01-31 17:56:53,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:56:53,114 INFO L225 Difference]: With dead ends: 255 [2022-01-31 17:56:53,114 INFO L226 Difference]: Without dead ends: 170 [2022-01-31 17:56:53,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2223, Invalid=3629, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 17:56:53,115 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 252 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:56:53,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 46 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:56:53,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-01-31 17:56:53,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 168. [2022-01-31 17:56:53,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 162 states have (on average 1.0185185185185186) internal successors, (165), 162 states have internal predecessors, (165), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:56:53,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 170 transitions. [2022-01-31 17:56:53,145 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 170 transitions. Word has length 159 [2022-01-31 17:56:53,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:56:53,146 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 170 transitions. [2022-01-31 17:56:53,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:53,146 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 170 transitions. [2022-01-31 17:56:53,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-01-31 17:56:53,147 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:56:53,147 INFO L514 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:56:53,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-01-31 17:56:53,147 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:56:53,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:56:53,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1109672673, now seen corresponding path program 37 times [2022-01-31 17:56:53,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:56:53,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2075736511] [2022-01-31 17:56:53,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:56:53,150 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:56:53,150 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:56:53,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:56:53,153 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:56:53,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:53,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:56:53,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:53,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:56:53,787 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:56:53,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2075736511] [2022-01-31 17:56:53,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2075736511] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:56:53,787 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:56:53,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-01-31 17:56:53,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529680735] [2022-01-31 17:56:53,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:56:53,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-31 17:56:53,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:56:53,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-31 17:56:53,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 17:56:53,789 INFO L87 Difference]: Start difference. First operand 168 states and 170 transitions. Second operand has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:54,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:56:54,643 INFO L93 Difference]: Finished difference Result 261 states and 266 transitions. [2022-01-31 17:56:54,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 17:56:54,643 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 163 [2022-01-31 17:56:54,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:56:54,644 INFO L225 Difference]: With dead ends: 261 [2022-01-31 17:56:54,644 INFO L226 Difference]: Without dead ends: 174 [2022-01-31 17:56:54,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2340, Invalid=3822, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 17:56:54,645 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 278 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:56:54,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 31 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:56:54,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-01-31 17:56:54,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 172. [2022-01-31 17:56:54,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 166 states have (on average 1.0180722891566265) internal successors, (169), 166 states have internal predecessors, (169), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:56:54,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 174 transitions. [2022-01-31 17:56:54,678 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 174 transitions. Word has length 163 [2022-01-31 17:56:54,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:56:54,678 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 174 transitions. [2022-01-31 17:56:54,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:54,678 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 174 transitions. [2022-01-31 17:56:54,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-01-31 17:56:54,679 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:56:54,679 INFO L514 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:56:54,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-01-31 17:56:54,679 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:56:54,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:56:54,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1970456475, now seen corresponding path program 38 times [2022-01-31 17:56:54,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:56:54,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [996012020] [2022-01-31 17:56:54,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:56:54,682 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:56:54,682 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:56:54,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:56:54,685 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:56:54,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:55,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:56:55,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:55,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:56:55,330 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:56:55,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [996012020] [2022-01-31 17:56:55,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [996012020] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:56:55,331 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:56:55,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-01-31 17:56:55,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390193391] [2022-01-31 17:56:55,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:56:55,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 17:56:55,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:56:55,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 17:56:55,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 17:56:55,332 INFO L87 Difference]: Start difference. First operand 172 states and 174 transitions. Second operand has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:56,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:56:56,202 INFO L93 Difference]: Finished difference Result 267 states and 272 transitions. [2022-01-31 17:56:56,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-31 17:56:56,203 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 167 [2022-01-31 17:56:56,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:56:56,204 INFO L225 Difference]: With dead ends: 267 [2022-01-31 17:56:56,204 INFO L226 Difference]: Without dead ends: 178 [2022-01-31 17:56:56,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2460, Invalid=4020, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 17:56:56,205 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 253 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:56:56,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 41 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:56:56,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-01-31 17:56:56,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 176. [2022-01-31 17:56:56,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 170 states have (on average 1.0176470588235293) internal successors, (173), 170 states have internal predecessors, (173), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:56:56,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 178 transitions. [2022-01-31 17:56:56,229 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 178 transitions. Word has length 167 [2022-01-31 17:56:56,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:56:56,229 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 178 transitions. [2022-01-31 17:56:56,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:56,229 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 178 transitions. [2022-01-31 17:56:56,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-01-31 17:56:56,230 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:56:56,230 INFO L514 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:56:56,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-01-31 17:56:56,230 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:56:56,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:56:56,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1298474007, now seen corresponding path program 39 times [2022-01-31 17:56:56,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:56:56,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [376556073] [2022-01-31 17:56:56,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:56:56,233 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:56:56,233 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:56:56,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:56:56,237 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:56:56,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:56,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:56:56,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:56,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:56:56,926 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:56:56,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [376556073] [2022-01-31 17:56:56,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [376556073] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:56:56,926 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:56:56,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-01-31 17:56:56,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505133837] [2022-01-31 17:56:56,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:56:56,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-31 17:56:56,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:56:56,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-31 17:56:56,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 17:56:56,928 INFO L87 Difference]: Start difference. First operand 176 states and 178 transitions. Second operand has 43 states, 43 states have (on average 2.116279069767442) internal successors, (91), 42 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:57,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:56:57,825 INFO L93 Difference]: Finished difference Result 273 states and 278 transitions. [2022-01-31 17:56:57,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-31 17:56:57,826 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.116279069767442) internal successors, (91), 42 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 171 [2022-01-31 17:56:57,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:56:57,826 INFO L225 Difference]: With dead ends: 273 [2022-01-31 17:56:57,827 INFO L226 Difference]: Without dead ends: 182 [2022-01-31 17:56:57,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2583, Invalid=4223, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 17:56:57,828 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 253 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:56:57,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 51 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:56:57,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-01-31 17:56:57,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 180. [2022-01-31 17:56:57,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 174 states have (on average 1.0172413793103448) internal successors, (177), 174 states have internal predecessors, (177), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:56:57,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 182 transitions. [2022-01-31 17:56:57,864 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 182 transitions. Word has length 171 [2022-01-31 17:56:57,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:56:57,865 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 182 transitions. [2022-01-31 17:56:57,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.116279069767442) internal successors, (91), 42 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:57,865 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 182 transitions. [2022-01-31 17:56:57,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-01-31 17:56:57,866 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:56:57,866 INFO L514 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:56:57,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-01-31 17:56:57,866 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:56:57,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:56:57,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1874996589, now seen corresponding path program 40 times [2022-01-31 17:56:57,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:56:57,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [465460644] [2022-01-31 17:56:57,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:56:57,869 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:56:57,869 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:56:57,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:56:57,872 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:56:57,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:58,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:56:58,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:58,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:56:58,656 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:56:58,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [465460644] [2022-01-31 17:56:58,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [465460644] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:56:58,656 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:56:58,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-01-31 17:56:58,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46941139] [2022-01-31 17:56:58,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:56:58,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 17:56:58,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:56:58,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 17:56:58,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 17:56:58,658 INFO L87 Difference]: Start difference. First operand 180 states and 182 transitions. Second operand has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 43 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:59,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:56:59,671 INFO L93 Difference]: Finished difference Result 279 states and 284 transitions. [2022-01-31 17:56:59,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-31 17:56:59,674 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 43 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 175 [2022-01-31 17:56:59,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:56:59,675 INFO L225 Difference]: With dead ends: 279 [2022-01-31 17:56:59,675 INFO L226 Difference]: Without dead ends: 186 [2022-01-31 17:56:59,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2709, Invalid=4431, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 17:56:59,677 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 318 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 267 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 267 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:56:59,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 31 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [267 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:56:59,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-01-31 17:56:59,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 184. [2022-01-31 17:56:59,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 178 states have (on average 1.0168539325842696) internal successors, (181), 178 states have internal predecessors, (181), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:56:59,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 186 transitions. [2022-01-31 17:56:59,722 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 186 transitions. Word has length 175 [2022-01-31 17:56:59,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:56:59,722 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 186 transitions. [2022-01-31 17:56:59,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 43 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:59,723 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 186 transitions. [2022-01-31 17:56:59,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-01-31 17:56:59,723 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:56:59,723 INFO L514 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:56:59,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-01-31 17:56:59,724 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:56:59,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:56:59,724 INFO L85 PathProgramCache]: Analyzing trace with hash 973591311, now seen corresponding path program 41 times [2022-01-31 17:56:59,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:56:59,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1468289806] [2022-01-31 17:56:59,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:56:59,726 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:56:59,727 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:56:59,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:56:59,731 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:56:59,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:00,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:57:00,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:00,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:57:00,426 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:57:00,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1468289806] [2022-01-31 17:57:00,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1468289806] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:57:00,426 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:57:00,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-01-31 17:57:00,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154408637] [2022-01-31 17:57:00,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:57:00,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-31 17:57:00,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:57:00,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-31 17:57:00,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 17:57:00,428 INFO L87 Difference]: Start difference. First operand 184 states and 186 transitions. Second operand has 45 states, 45 states have (on average 2.111111111111111) internal successors, (95), 44 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:01,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:57:01,423 INFO L93 Difference]: Finished difference Result 285 states and 290 transitions. [2022-01-31 17:57:01,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 17:57:01,423 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.111111111111111) internal successors, (95), 44 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 179 [2022-01-31 17:57:01,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:57:01,424 INFO L225 Difference]: With dead ends: 285 [2022-01-31 17:57:01,424 INFO L226 Difference]: Without dead ends: 190 [2022-01-31 17:57:01,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2838, Invalid=4644, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 17:57:01,425 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 317 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:57:01,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 31 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:57:01,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-01-31 17:57:01,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 188. [2022-01-31 17:57:01,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 182 states have (on average 1.0164835164835164) internal successors, (185), 182 states have internal predecessors, (185), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:57:01,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 190 transitions. [2022-01-31 17:57:01,452 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 190 transitions. Word has length 179 [2022-01-31 17:57:01,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:57:01,452 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 190 transitions. [2022-01-31 17:57:01,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.111111111111111) internal successors, (95), 44 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:01,452 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 190 transitions. [2022-01-31 17:57:01,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-01-31 17:57:01,453 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:57:01,453 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:57:01,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-01-31 17:57:01,453 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:57:01,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:57:01,454 INFO L85 PathProgramCache]: Analyzing trace with hash 2018387339, now seen corresponding path program 42 times [2022-01-31 17:57:01,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:57:01,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1083892046] [2022-01-31 17:57:01,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:57:01,456 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:57:01,456 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:57:01,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:57:01,459 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:57:01,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:02,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:57:02,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:02,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:57:02,162 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:57:02,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1083892046] [2022-01-31 17:57:02,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1083892046] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:57:02,162 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:57:02,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-01-31 17:57:02,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172368586] [2022-01-31 17:57:02,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:57:02,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-31 17:57:02,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:57:02,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-31 17:57:02,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 17:57:02,164 INFO L87 Difference]: Start difference. First operand 188 states and 190 transitions. Second operand has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:03,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:57:03,168 INFO L93 Difference]: Finished difference Result 291 states and 296 transitions. [2022-01-31 17:57:03,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 17:57:03,168 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 183 [2022-01-31 17:57:03,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:57:03,169 INFO L225 Difference]: With dead ends: 291 [2022-01-31 17:57:03,169 INFO L226 Difference]: Without dead ends: 194 [2022-01-31 17:57:03,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2970, Invalid=4862, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 17:57:03,170 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 319 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 268 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 268 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:57:03,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 31 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [268 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:57:03,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-01-31 17:57:03,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 192. [2022-01-31 17:57:03,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 186 states have (on average 1.0161290322580645) internal successors, (189), 186 states have internal predecessors, (189), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:57:03,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 194 transitions. [2022-01-31 17:57:03,197 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 194 transitions. Word has length 183 [2022-01-31 17:57:03,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:57:03,197 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 194 transitions. [2022-01-31 17:57:03,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:03,197 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 194 transitions. [2022-01-31 17:57:03,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-01-31 17:57:03,198 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:57:03,198 INFO L514 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:57:03,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-01-31 17:57:03,198 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:57:03,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:57:03,198 INFO L85 PathProgramCache]: Analyzing trace with hash 706464263, now seen corresponding path program 43 times [2022-01-31 17:57:03,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:57:03,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1903212718] [2022-01-31 17:57:03,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:57:03,200 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:57:03,200 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:57:03,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:57:03,203 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:57:03,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:03,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:57:03,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:03,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:57:03,964 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:57:03,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1903212718] [2022-01-31 17:57:03,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1903212718] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:57:03,964 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:57:03,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-01-31 17:57:03,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619399344] [2022-01-31 17:57:03,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:57:03,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-31 17:57:03,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:57:03,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-31 17:57:03,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 17:57:03,966 INFO L87 Difference]: Start difference. First operand 192 states and 194 transitions. Second operand has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 46 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:05,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:57:05,035 INFO L93 Difference]: Finished difference Result 297 states and 302 transitions. [2022-01-31 17:57:05,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-31 17:57:05,035 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 46 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 187 [2022-01-31 17:57:05,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:57:05,036 INFO L225 Difference]: With dead ends: 297 [2022-01-31 17:57:05,036 INFO L226 Difference]: Without dead ends: 198 [2022-01-31 17:57:05,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3105, Invalid=5085, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 17:57:05,037 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 293 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:57:05,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 41 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:57:05,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-01-31 17:57:05,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 196. [2022-01-31 17:57:05,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 190 states have (on average 1.0157894736842106) internal successors, (193), 190 states have internal predecessors, (193), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:57:05,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 198 transitions. [2022-01-31 17:57:05,068 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 198 transitions. Word has length 187 [2022-01-31 17:57:05,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:57:05,069 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 198 transitions. [2022-01-31 17:57:05,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 46 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:05,069 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 198 transitions. [2022-01-31 17:57:05,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-01-31 17:57:05,070 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:57:05,070 INFO L514 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:57:05,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-01-31 17:57:05,070 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:57:05,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:57:05,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1610334339, now seen corresponding path program 44 times [2022-01-31 17:57:05,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:57:05,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1611013513] [2022-01-31 17:57:05,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:57:05,073 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:57:05,073 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:57:05,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:57:05,076 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:57:05,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:05,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:57:05,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:05,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:57:05,858 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:57:05,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1611013513] [2022-01-31 17:57:05,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1611013513] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:57:05,858 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:57:05,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-01-31 17:57:05,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522623440] [2022-01-31 17:57:05,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:57:05,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-31 17:57:05,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:57:05,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-31 17:57:05,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 17:57:05,860 INFO L87 Difference]: Start difference. First operand 196 states and 198 transitions. Second operand has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 47 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:06,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:57:06,981 INFO L93 Difference]: Finished difference Result 303 states and 308 transitions. [2022-01-31 17:57:06,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 17:57:06,982 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 47 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 191 [2022-01-31 17:57:06,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:57:06,983 INFO L225 Difference]: With dead ends: 303 [2022-01-31 17:57:06,983 INFO L226 Difference]: Without dead ends: 202 [2022-01-31 17:57:06,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3243, Invalid=5313, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 17:57:06,984 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 340 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 288 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 288 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:57:06,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 46 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [288 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:57:06,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-01-31 17:57:07,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 200. [2022-01-31 17:57:07,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 194 states have (on average 1.0154639175257731) internal successors, (197), 194 states have internal predecessors, (197), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:57:07,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 202 transitions. [2022-01-31 17:57:07,017 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 202 transitions. Word has length 191 [2022-01-31 17:57:07,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:57:07,017 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 202 transitions. [2022-01-31 17:57:07,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 47 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:07,018 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 202 transitions. [2022-01-31 17:57:07,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-01-31 17:57:07,018 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:57:07,019 INFO L514 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:57:07,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-01-31 17:57:07,019 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:57:07,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:57:07,019 INFO L85 PathProgramCache]: Analyzing trace with hash -604436225, now seen corresponding path program 45 times [2022-01-31 17:57:07,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:57:07,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1344301703] [2022-01-31 17:57:07,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:57:07,021 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:57:07,021 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:57:07,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:57:07,025 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:57:07,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:07,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:57:07,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:07,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:57:07,886 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:57:07,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1344301703] [2022-01-31 17:57:07,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1344301703] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:57:07,887 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:57:07,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-01-31 17:57:07,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478417193] [2022-01-31 17:57:07,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:57:07,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-31 17:57:07,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:57:07,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-31 17:57:07,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 17:57:07,888 INFO L87 Difference]: Start difference. First operand 200 states and 202 transitions. Second operand has 49 states, 49 states have (on average 2.1020408163265305) internal successors, (103), 48 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:09,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:57:09,017 INFO L93 Difference]: Finished difference Result 309 states and 314 transitions. [2022-01-31 17:57:09,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 17:57:09,018 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.1020408163265305) internal successors, (103), 48 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 195 [2022-01-31 17:57:09,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:57:09,018 INFO L225 Difference]: With dead ends: 309 [2022-01-31 17:57:09,018 INFO L226 Difference]: Without dead ends: 206 [2022-01-31 17:57:09,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3384, Invalid=5546, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 17:57:09,020 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 286 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:57:09,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 56 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:57:09,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-01-31 17:57:09,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 204. [2022-01-31 17:57:09,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 198 states have (on average 1.0151515151515151) internal successors, (201), 198 states have internal predecessors, (201), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:57:09,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 206 transitions. [2022-01-31 17:57:09,053 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 206 transitions. Word has length 195 [2022-01-31 17:57:09,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:57:09,053 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 206 transitions. [2022-01-31 17:57:09,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.1020408163265305) internal successors, (103), 48 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:09,053 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 206 transitions. [2022-01-31 17:57:09,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-01-31 17:57:09,054 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:57:09,054 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:57:09,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-01-31 17:57:09,054 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:57:09,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:57:09,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1851874437, now seen corresponding path program 46 times [2022-01-31 17:57:09,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:57:09,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1083244025] [2022-01-31 17:57:09,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:57:09,057 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:57:09,057 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:57:09,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:57:09,060 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:57:09,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:09,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:57:09,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:09,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:57:09,908 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:57:09,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1083244025] [2022-01-31 17:57:09,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1083244025] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:57:09,909 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:57:09,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-01-31 17:57:09,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147549719] [2022-01-31 17:57:09,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:57:09,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 17:57:09,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:57:09,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 17:57:09,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 17:57:09,910 INFO L87 Difference]: Start difference. First operand 204 states and 206 transitions. Second operand has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:11,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:57:11,097 INFO L93 Difference]: Finished difference Result 315 states and 320 transitions. [2022-01-31 17:57:11,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-31 17:57:11,098 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 199 [2022-01-31 17:57:11,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:57:11,098 INFO L225 Difference]: With dead ends: 315 [2022-01-31 17:57:11,099 INFO L226 Difference]: Without dead ends: 210 [2022-01-31 17:57:11,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3528, Invalid=5784, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 17:57:11,100 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 318 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 261 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 261 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:57:11,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 46 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [261 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:57:11,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-01-31 17:57:11,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 208. [2022-01-31 17:57:11,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 202 states have (on average 1.0148514851485149) internal successors, (205), 202 states have internal predecessors, (205), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:57:11,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 210 transitions. [2022-01-31 17:57:11,150 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 210 transitions. Word has length 199 [2022-01-31 17:57:11,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:57:11,150 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 210 transitions. [2022-01-31 17:57:11,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:11,151 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 210 transitions. [2022-01-31 17:57:11,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-01-31 17:57:11,151 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:57:11,152 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:57:11,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-01-31 17:57:11,152 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:57:11,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:57:11,152 INFO L85 PathProgramCache]: Analyzing trace with hash 636981239, now seen corresponding path program 47 times [2022-01-31 17:57:11,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:57:11,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [700921790] [2022-01-31 17:57:11,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:57:11,154 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:57:11,154 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:57:11,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:57:11,158 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:57:11,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:12,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:57:12,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:12,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:57:12,080 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:57:12,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [700921790] [2022-01-31 17:57:12,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [700921790] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:57:12,080 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:57:12,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-01-31 17:57:12,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61199168] [2022-01-31 17:57:12,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:57:12,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-31 17:57:12,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:57:12,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-31 17:57:12,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 17:57:12,083 INFO L87 Difference]: Start difference. First operand 208 states and 210 transitions. Second operand has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 50 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:13,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:57:13,321 INFO L93 Difference]: Finished difference Result 321 states and 326 transitions. [2022-01-31 17:57:13,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 17:57:13,321 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 50 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 203 [2022-01-31 17:57:13,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:57:13,322 INFO L225 Difference]: With dead ends: 321 [2022-01-31 17:57:13,322 INFO L226 Difference]: Without dead ends: 214 [2022-01-31 17:57:13,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3675, Invalid=6027, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 17:57:13,324 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 299 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:57:13,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 66 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:57:13,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-01-31 17:57:13,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 212. [2022-01-31 17:57:13,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 206 states have (on average 1.0145631067961165) internal successors, (209), 206 states have internal predecessors, (209), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:57:13,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 214 transitions. [2022-01-31 17:57:13,370 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 214 transitions. Word has length 203 [2022-01-31 17:57:13,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:57:13,370 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 214 transitions. [2022-01-31 17:57:13,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 50 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:13,370 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 214 transitions. [2022-01-31 17:57:13,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-01-31 17:57:13,371 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:57:13,371 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:57:13,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-01-31 17:57:13,371 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:57:13,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:57:13,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1871629939, now seen corresponding path program 48 times [2022-01-31 17:57:13,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:57:13,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1452903034] [2022-01-31 17:57:13,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:57:13,374 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:57:13,374 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:57:13,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:57:13,378 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:57:13,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:14,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:57:14,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:14,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:57:14,271 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:57:14,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1452903034] [2022-01-31 17:57:14,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1452903034] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:57:14,271 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:57:14,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-01-31 17:57:14,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144513254] [2022-01-31 17:57:14,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:57:14,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-01-31 17:57:14,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:57:14,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-01-31 17:57:14,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 17:57:14,273 INFO L87 Difference]: Start difference. First operand 212 states and 214 transitions. Second operand has 52 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 51 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:15,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:57:15,540 INFO L93 Difference]: Finished difference Result 327 states and 332 transitions. [2022-01-31 17:57:15,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-31 17:57:15,540 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 51 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 207 [2022-01-31 17:57:15,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:57:15,541 INFO L225 Difference]: With dead ends: 327 [2022-01-31 17:57:15,541 INFO L226 Difference]: Without dead ends: 218 [2022-01-31 17:57:15,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3825, Invalid=6275, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 17:57:15,542 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 317 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:57:15,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 41 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:57:15,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-01-31 17:57:15,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 216. [2022-01-31 17:57:15,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 210 states have (on average 1.0142857142857142) internal successors, (213), 210 states have internal predecessors, (213), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:57:15,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 218 transitions. [2022-01-31 17:57:15,575 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 218 transitions. Word has length 207 [2022-01-31 17:57:15,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:57:15,575 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 218 transitions. [2022-01-31 17:57:15,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 51 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:15,576 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 218 transitions. [2022-01-31 17:57:15,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-01-31 17:57:15,577 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:57:15,577 INFO L514 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:57:15,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-01-31 17:57:15,577 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:57:15,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:57:15,577 INFO L85 PathProgramCache]: Analyzing trace with hash -160473361, now seen corresponding path program 49 times [2022-01-31 17:57:15,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:57:15,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [455337326] [2022-01-31 17:57:15,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:57:15,579 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:57:15,579 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:57:15,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:57:15,583 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:57:15,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:16,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:57:16,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:16,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:57:16,567 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:57:16,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [455337326] [2022-01-31 17:57:16,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [455337326] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:57:16,568 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:57:16,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-01-31 17:57:16,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93233253] [2022-01-31 17:57:16,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:57:16,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-31 17:57:16,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:57:16,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-31 17:57:16,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 17:57:16,569 INFO L87 Difference]: Start difference. First operand 216 states and 218 transitions. Second operand has 53 states, 53 states have (on average 2.0943396226415096) internal successors, (111), 52 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:17,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:57:17,894 INFO L93 Difference]: Finished difference Result 333 states and 338 transitions. [2022-01-31 17:57:17,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-31 17:57:17,894 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.0943396226415096) internal successors, (111), 52 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 211 [2022-01-31 17:57:17,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:57:17,895 INFO L225 Difference]: With dead ends: 333 [2022-01-31 17:57:17,895 INFO L226 Difference]: Without dead ends: 222 [2022-01-31 17:57:17,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3978, Invalid=6528, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 17:57:17,897 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 388 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 330 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 330 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:57:17,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [389 Valid, 31 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [330 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:57:17,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-01-31 17:57:17,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 220. [2022-01-31 17:57:17,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 214 states have (on average 1.014018691588785) internal successors, (217), 214 states have internal predecessors, (217), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:57:17,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 222 transitions. [2022-01-31 17:57:17,932 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 222 transitions. Word has length 211 [2022-01-31 17:57:17,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:57:17,932 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 222 transitions. [2022-01-31 17:57:17,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.0943396226415096) internal successors, (111), 52 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:17,932 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 222 transitions. [2022-01-31 17:57:17,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-01-31 17:57:17,933 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:57:17,933 INFO L514 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:57:17,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-01-31 17:57:17,933 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:57:17,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:57:17,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1948533099, now seen corresponding path program 50 times [2022-01-31 17:57:17,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:57:17,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [642155429] [2022-01-31 17:57:17,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:57:17,935 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:57:17,935 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:57:17,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:57:17,938 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:57:17,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:18,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:57:18,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:18,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:57:18,931 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:57:18,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [642155429] [2022-01-31 17:57:18,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [642155429] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:57:18,931 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:57:18,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-01-31 17:57:18,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444973583] [2022-01-31 17:57:18,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:57:18,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-01-31 17:57:18,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:57:18,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-01-31 17:57:18,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 17:57:18,933 INFO L87 Difference]: Start difference. First operand 220 states and 222 transitions. Second operand has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 53 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:20,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:57:20,289 INFO L93 Difference]: Finished difference Result 339 states and 344 transitions. [2022-01-31 17:57:20,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-31 17:57:20,291 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 53 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 215 [2022-01-31 17:57:20,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:57:20,292 INFO L225 Difference]: With dead ends: 339 [2022-01-31 17:57:20,292 INFO L226 Difference]: Without dead ends: 226 [2022-01-31 17:57:20,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1325 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4134, Invalid=6786, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 17:57:20,293 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 347 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 285 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 285 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:57:20,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [348 Valid, 51 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [285 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:57:20,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-01-31 17:57:20,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 224. [2022-01-31 17:57:20,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 218 states have (on average 1.0137614678899083) internal successors, (221), 218 states have internal predecessors, (221), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:57:20,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 226 transitions. [2022-01-31 17:57:20,330 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 226 transitions. Word has length 215 [2022-01-31 17:57:20,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:57:20,330 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 226 transitions. [2022-01-31 17:57:20,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 53 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:20,331 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 226 transitions. [2022-01-31 17:57:20,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-01-31 17:57:20,332 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:57:20,332 INFO L514 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:57:20,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-01-31 17:57:20,332 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:57:20,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:57:20,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1404597735, now seen corresponding path program 51 times [2022-01-31 17:57:20,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:57:20,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [966124925] [2022-01-31 17:57:20,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:57:20,334 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:57:20,334 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:57:20,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:57:20,338 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:57:20,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:21,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:57:21,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:21,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:57:21,386 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:57:21,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [966124925] [2022-01-31 17:57:21,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [966124925] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:57:21,386 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:57:21,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-01-31 17:57:21,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138814881] [2022-01-31 17:57:21,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:57:21,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-01-31 17:57:21,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:57:21,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-01-31 17:57:21,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 17:57:21,387 INFO L87 Difference]: Start difference. First operand 224 states and 226 transitions. Second operand has 55 states, 55 states have (on average 2.090909090909091) internal successors, (115), 54 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:22,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:57:22,771 INFO L93 Difference]: Finished difference Result 345 states and 350 transitions. [2022-01-31 17:57:22,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-31 17:57:22,771 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.090909090909091) internal successors, (115), 54 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 219 [2022-01-31 17:57:22,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:57:22,772 INFO L225 Difference]: With dead ends: 345 [2022-01-31 17:57:22,772 INFO L226 Difference]: Without dead ends: 230 [2022-01-31 17:57:22,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4293, Invalid=7049, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 17:57:22,773 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 346 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 283 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 283 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:57:22,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [347 Valid, 51 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [283 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:57:22,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-01-31 17:57:22,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 228. [2022-01-31 17:57:22,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 222 states have (on average 1.0135135135135136) internal successors, (225), 222 states have internal predecessors, (225), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:57:22,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 230 transitions. [2022-01-31 17:57:22,830 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 230 transitions. Word has length 219 [2022-01-31 17:57:22,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:57:22,830 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 230 transitions. [2022-01-31 17:57:22,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.090909090909091) internal successors, (115), 54 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:22,831 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 230 transitions. [2022-01-31 17:57:22,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2022-01-31 17:57:22,832 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:57:22,832 INFO L514 BasicCegarLoop]: trace histogram [52, 52, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:57:22,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-01-31 17:57:22,832 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:57:22,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:57:22,832 INFO L85 PathProgramCache]: Analyzing trace with hash 834075747, now seen corresponding path program 52 times [2022-01-31 17:57:22,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:57:22,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1189125679] [2022-01-31 17:57:22,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:57:22,834 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:57:22,834 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:57:22,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:57:22,839 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:57:22,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:23,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:57:23,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:23,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:57:23,914 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:57:23,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1189125679] [2022-01-31 17:57:23,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1189125679] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:57:23,914 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:57:23,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-01-31 17:57:23,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544856337] [2022-01-31 17:57:23,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:57:23,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-31 17:57:23,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:57:23,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-31 17:57:23,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 17:57:23,915 INFO L87 Difference]: Start difference. First operand 228 states and 230 transitions. Second operand has 56 states, 56 states have (on average 2.0892857142857144) internal successors, (117), 55 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:25,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:57:25,326 INFO L93 Difference]: Finished difference Result 351 states and 356 transitions. [2022-01-31 17:57:25,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-31 17:57:25,326 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.0892857142857144) internal successors, (117), 55 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 223 [2022-01-31 17:57:25,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:57:25,327 INFO L225 Difference]: With dead ends: 351 [2022-01-31 17:57:25,327 INFO L226 Difference]: Without dead ends: 234 [2022-01-31 17:57:25,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=4455, Invalid=7317, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 17:57:25,328 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 367 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:57:25,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [368 Valid, 36 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:57:25,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-01-31 17:57:25,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 232. [2022-01-31 17:57:25,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 226 states have (on average 1.0132743362831858) internal successors, (229), 226 states have internal predecessors, (229), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:57:25,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 234 transitions. [2022-01-31 17:57:25,381 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 234 transitions. Word has length 223 [2022-01-31 17:57:25,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:57:25,381 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 234 transitions. [2022-01-31 17:57:25,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.0892857142857144) internal successors, (117), 55 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:25,382 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 234 transitions. [2022-01-31 17:57:25,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2022-01-31 17:57:25,382 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:57:25,383 INFO L514 BasicCegarLoop]: trace histogram [53, 53, 53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:57:25,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-01-31 17:57:25,383 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:57:25,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:57:25,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1546310879, now seen corresponding path program 53 times [2022-01-31 17:57:25,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:57:25,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1515623893] [2022-01-31 17:57:25,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:57:25,385 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:57:25,385 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:57:25,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:57:25,390 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:57:25,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:26,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:57:26,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:26,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:57:26,496 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:57:26,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1515623893] [2022-01-31 17:57:26,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1515623893] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:57:26,496 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:57:26,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-01-31 17:57:26,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770148556] [2022-01-31 17:57:26,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:57:26,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-01-31 17:57:26,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:57:26,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-01-31 17:57:26,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 17:57:26,498 INFO L87 Difference]: Start difference. First operand 232 states and 234 transitions. Second operand has 57 states, 57 states have (on average 2.087719298245614) internal successors, (119), 56 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:27,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:57:27,972 INFO L93 Difference]: Finished difference Result 357 states and 362 transitions. [2022-01-31 17:57:27,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 17:57:27,972 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.087719298245614) internal successors, (119), 56 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 227 [2022-01-31 17:57:27,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:57:27,973 INFO L225 Difference]: With dead ends: 357 [2022-01-31 17:57:27,973 INFO L226 Difference]: Without dead ends: 238 [2022-01-31 17:57:27,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1484 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=4620, Invalid=7590, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 17:57:27,974 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 363 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 299 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 299 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:57:27,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 41 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [299 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:57:27,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-01-31 17:57:28,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 236. [2022-01-31 17:57:28,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 230 states have (on average 1.0130434782608695) internal successors, (233), 230 states have internal predecessors, (233), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:57:28,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 238 transitions. [2022-01-31 17:57:28,013 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 238 transitions. Word has length 227 [2022-01-31 17:57:28,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:57:28,013 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 238 transitions. [2022-01-31 17:57:28,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.087719298245614) internal successors, (119), 56 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:28,013 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 238 transitions. [2022-01-31 17:57:28,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2022-01-31 17:57:28,014 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:57:28,014 INFO L514 BasicCegarLoop]: trace histogram [54, 54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:57:28,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-01-31 17:57:28,014 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:57:28,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:57:28,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1386151771, now seen corresponding path program 54 times [2022-01-31 17:57:28,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:57:28,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1923291045] [2022-01-31 17:57:28,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:57:28,017 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:57:28,017 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:57:28,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:57:28,021 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:57:28,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:29,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:57:29,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:29,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:57:29,190 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:57:29,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1923291045] [2022-01-31 17:57:29,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1923291045] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:57:29,190 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:57:29,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-01-31 17:57:29,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250944015] [2022-01-31 17:57:29,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:57:29,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-01-31 17:57:29,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:57:29,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-01-31 17:57:29,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 17:57:29,191 INFO L87 Difference]: Start difference. First operand 236 states and 238 transitions. Second operand has 58 states, 58 states have (on average 2.086206896551724) internal successors, (121), 57 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:30,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:57:30,724 INFO L93 Difference]: Finished difference Result 363 states and 368 transitions. [2022-01-31 17:57:30,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-31 17:57:30,724 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.086206896551724) internal successors, (121), 57 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 231 [2022-01-31 17:57:30,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:57:30,725 INFO L225 Difference]: With dead ends: 363 [2022-01-31 17:57:30,725 INFO L226 Difference]: Without dead ends: 242 [2022-01-31 17:57:30,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=4788, Invalid=7868, Unknown=0, NotChecked=0, Total=12656 [2022-01-31 17:57:30,727 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 344 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 278 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 278 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:57:30,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [345 Valid, 56 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [278 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:57:30,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-01-31 17:57:30,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 240. [2022-01-31 17:57:30,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 234 states have (on average 1.0128205128205128) internal successors, (237), 234 states have internal predecessors, (237), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:57:30,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 242 transitions. [2022-01-31 17:57:30,784 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 242 transitions. Word has length 231 [2022-01-31 17:57:30,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:57:30,785 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 242 transitions. [2022-01-31 17:57:30,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.086206896551724) internal successors, (121), 57 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:30,785 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 242 transitions. [2022-01-31 17:57:30,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-01-31 17:57:30,786 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:57:30,786 INFO L514 BasicCegarLoop]: trace histogram [55, 55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:57:30,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-01-31 17:57:30,786 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:57:30,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:57:30,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1176402903, now seen corresponding path program 55 times [2022-01-31 17:57:30,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:57:30,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [424788321] [2022-01-31 17:57:30,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:57:30,788 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:57:30,788 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:57:30,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:57:30,797 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:57:30,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:31,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:57:31,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:31,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:57:31,926 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:57:31,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [424788321] [2022-01-31 17:57:31,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [424788321] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:57:31,927 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:57:31,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-01-31 17:57:31,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030171274] [2022-01-31 17:57:31,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:57:31,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-01-31 17:57:31,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:57:31,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-01-31 17:57:31,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 17:57:31,928 INFO L87 Difference]: Start difference. First operand 240 states and 242 transitions. Second operand has 59 states, 59 states have (on average 2.0847457627118646) internal successors, (123), 58 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:33,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:57:33,516 INFO L93 Difference]: Finished difference Result 369 states and 374 transitions. [2022-01-31 17:57:33,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-31 17:57:33,516 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.0847457627118646) internal successors, (123), 58 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 235 [2022-01-31 17:57:33,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:57:33,517 INFO L225 Difference]: With dead ends: 369 [2022-01-31 17:57:33,517 INFO L226 Difference]: Without dead ends: 246 [2022-01-31 17:57:33,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=4959, Invalid=8151, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 17:57:33,518 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 359 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 295 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 295 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:57:33,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [360 Valid, 46 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [295 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:57:33,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-01-31 17:57:33,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 244. [2022-01-31 17:57:33,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 238 states have (on average 1.0126050420168067) internal successors, (241), 238 states have internal predecessors, (241), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:57:33,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 246 transitions. [2022-01-31 17:57:33,582 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 246 transitions. Word has length 235 [2022-01-31 17:57:33,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:57:33,582 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 246 transitions. [2022-01-31 17:57:33,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.0847457627118646) internal successors, (123), 58 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:33,583 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 246 transitions. [2022-01-31 17:57:33,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-01-31 17:57:33,584 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:57:33,584 INFO L514 BasicCegarLoop]: trace histogram [56, 56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:57:33,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-01-31 17:57:33,584 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:57:33,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:57:33,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1724626349, now seen corresponding path program 56 times [2022-01-31 17:57:33,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:57:33,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [995285841] [2022-01-31 17:57:33,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:57:33,586 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:57:33,586 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:57:33,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:57:33,591 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:57:33,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:34,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:57:34,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:34,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:57:34,741 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:57:34,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [995285841] [2022-01-31 17:57:34,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [995285841] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:57:34,741 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:57:34,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-01-31 17:57:34,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325743431] [2022-01-31 17:57:34,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:57:34,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-01-31 17:57:34,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:57:34,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-01-31 17:57:34,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 17:57:34,742 INFO L87 Difference]: Start difference. First operand 244 states and 246 transitions. Second operand has 60 states, 60 states have (on average 2.0833333333333335) internal successors, (125), 59 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:36,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:57:36,384 INFO L93 Difference]: Finished difference Result 375 states and 380 transitions. [2022-01-31 17:57:36,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-31 17:57:36,384 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.0833333333333335) internal successors, (125), 59 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 239 [2022-01-31 17:57:36,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:57:36,385 INFO L225 Difference]: With dead ends: 375 [2022-01-31 17:57:36,385 INFO L226 Difference]: Without dead ends: 250 [2022-01-31 17:57:36,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1652 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=5133, Invalid=8439, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 17:57:36,386 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 332 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:57:36,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [333 Valid, 66 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:57:36,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-01-31 17:57:36,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 248. [2022-01-31 17:57:36,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 242 states have (on average 1.012396694214876) internal successors, (245), 242 states have internal predecessors, (245), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:57:36,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 250 transitions. [2022-01-31 17:57:36,452 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 250 transitions. Word has length 239 [2022-01-31 17:57:36,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:57:36,452 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 250 transitions. [2022-01-31 17:57:36,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.0833333333333335) internal successors, (125), 59 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:36,452 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 250 transitions. [2022-01-31 17:57:36,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-01-31 17:57:36,453 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:57:36,453 INFO L514 BasicCegarLoop]: trace histogram [57, 57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:57:36,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-01-31 17:57:36,453 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:57:36,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:57:36,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1609263823, now seen corresponding path program 57 times [2022-01-31 17:57:36,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:57:36,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [874650705] [2022-01-31 17:57:36,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:57:36,455 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:57:36,455 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:57:36,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:57:36,460 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:57:36,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:37,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:57:37,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:37,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:57:37,693 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:57:37,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [874650705] [2022-01-31 17:57:37,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [874650705] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:57:37,693 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:57:37,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-01-31 17:57:37,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679555454] [2022-01-31 17:57:37,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:57:37,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-01-31 17:57:37,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:57:37,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-01-31 17:57:37,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 17:57:37,695 INFO L87 Difference]: Start difference. First operand 248 states and 250 transitions. Second operand has 61 states, 61 states have (on average 2.081967213114754) internal successors, (127), 60 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:39,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:57:39,378 INFO L93 Difference]: Finished difference Result 381 states and 386 transitions. [2022-01-31 17:57:39,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-31 17:57:39,378 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.081967213114754) internal successors, (127), 60 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 243 [2022-01-31 17:57:39,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:57:39,379 INFO L225 Difference]: With dead ends: 381 [2022-01-31 17:57:39,379 INFO L226 Difference]: Without dead ends: 254 [2022-01-31 17:57:39,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1710 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=5310, Invalid=8732, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 17:57:39,380 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 429 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 362 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 362 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:57:39,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [430 Valid, 41 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [362 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:57:39,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-01-31 17:57:39,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 252. [2022-01-31 17:57:39,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 246 states have (on average 1.0121951219512195) internal successors, (249), 246 states have internal predecessors, (249), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:57:39,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 254 transitions. [2022-01-31 17:57:39,433 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 254 transitions. Word has length 243 [2022-01-31 17:57:39,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:57:39,433 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 254 transitions. [2022-01-31 17:57:39,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.081967213114754) internal successors, (127), 60 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:39,433 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 254 transitions. [2022-01-31 17:57:39,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2022-01-31 17:57:39,434 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:57:39,434 INFO L514 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:57:39,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-01-31 17:57:39,434 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:57:39,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:57:39,435 INFO L85 PathProgramCache]: Analyzing trace with hash -540091061, now seen corresponding path program 58 times [2022-01-31 17:57:39,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:57:39,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [489861071] [2022-01-31 17:57:39,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:57:39,437 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:57:39,437 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:57:39,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:57:39,442 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:57:39,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:40,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:57:40,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:40,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:57:40,679 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:57:40,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [489861071] [2022-01-31 17:57:40,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [489861071] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:57:40,679 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:57:40,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-01-31 17:57:40,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709708334] [2022-01-31 17:57:40,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:57:40,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-01-31 17:57:40,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:57:40,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-01-31 17:57:40,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 17:57:40,681 INFO L87 Difference]: Start difference. First operand 252 states and 254 transitions. Second operand has 62 states, 62 states have (on average 2.0806451612903225) internal successors, (129), 61 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:42,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:57:42,423 INFO L93 Difference]: Finished difference Result 387 states and 392 transitions. [2022-01-31 17:57:42,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-31 17:57:42,423 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.0806451612903225) internal successors, (129), 61 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 247 [2022-01-31 17:57:42,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:57:42,424 INFO L225 Difference]: With dead ends: 387 [2022-01-31 17:57:42,424 INFO L226 Difference]: Without dead ends: 258 [2022-01-31 17:57:42,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1769 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=5490, Invalid=9030, Unknown=0, NotChecked=0, Total=14520 [2022-01-31 17:57:42,425 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 412 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 345 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 345 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:57:42,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [413 Valid, 46 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [345 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:57:42,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-01-31 17:57:42,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 256. [2022-01-31 17:57:42,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 250 states have (on average 1.012) internal successors, (253), 250 states have internal predecessors, (253), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:57:42,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 258 transitions. [2022-01-31 17:57:42,477 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 258 transitions. Word has length 247 [2022-01-31 17:57:42,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:57:42,477 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 258 transitions. [2022-01-31 17:57:42,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.0806451612903225) internal successors, (129), 61 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:42,477 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 258 transitions. [2022-01-31 17:57:42,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2022-01-31 17:57:42,478 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:57:42,478 INFO L514 BasicCegarLoop]: trace histogram [59, 59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:57:42,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-01-31 17:57:42,478 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:57:42,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:57:42,479 INFO L85 PathProgramCache]: Analyzing trace with hash 266969543, now seen corresponding path program 59 times [2022-01-31 17:57:42,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:57:42,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1894034326] [2022-01-31 17:57:42,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:57:42,480 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:57:42,481 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:57:42,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:57:42,486 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:57:42,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:43,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:57:43,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:43,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:57:43,754 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:57:43,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1894034326] [2022-01-31 17:57:43,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1894034326] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:57:43,754 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:57:43,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-01-31 17:57:43,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340136351] [2022-01-31 17:57:43,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:57:43,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-01-31 17:57:43,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:57:43,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-01-31 17:57:43,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 17:57:43,756 INFO L87 Difference]: Start difference. First operand 256 states and 258 transitions. Second operand has 63 states, 63 states have (on average 2.0793650793650795) internal successors, (131), 62 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:45,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:57:45,545 INFO L93 Difference]: Finished difference Result 393 states and 398 transitions. [2022-01-31 17:57:45,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-31 17:57:45,546 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.0793650793650795) internal successors, (131), 62 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 251 [2022-01-31 17:57:45,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:57:45,547 INFO L225 Difference]: With dead ends: 393 [2022-01-31 17:57:45,547 INFO L226 Difference]: Without dead ends: 262 [2022-01-31 17:57:45,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1829 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=5673, Invalid=9333, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 17:57:45,548 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 404 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 336 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 336 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:57:45,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [405 Valid, 46 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [336 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:57:45,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-01-31 17:57:45,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 260. [2022-01-31 17:57:45,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 254 states have (on average 1.0118110236220472) internal successors, (257), 254 states have internal predecessors, (257), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:57:45,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 262 transitions. [2022-01-31 17:57:45,600 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 262 transitions. Word has length 251 [2022-01-31 17:57:45,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:57:45,601 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 262 transitions. [2022-01-31 17:57:45,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.0793650793650795) internal successors, (131), 62 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:45,601 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 262 transitions. [2022-01-31 17:57:45,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2022-01-31 17:57:45,602 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:57:45,602 INFO L514 BasicCegarLoop]: trace histogram [60, 60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:57:45,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-01-31 17:57:45,602 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:57:45,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:57:45,602 INFO L85 PathProgramCache]: Analyzing trace with hash 415676483, now seen corresponding path program 60 times [2022-01-31 17:57:45,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:57:45,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1665663788] [2022-01-31 17:57:45,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:57:45,604 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:57:45,604 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:57:45,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:57:45,610 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:57:45,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:46,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:57:46,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:46,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:57:46,909 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:57:46,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1665663788] [2022-01-31 17:57:46,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1665663788] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:57:46,910 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:57:46,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-01-31 17:57:46,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750280954] [2022-01-31 17:57:46,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:57:46,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-01-31 17:57:46,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:57:46,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-01-31 17:57:46,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 17:57:46,911 INFO L87 Difference]: Start difference. First operand 260 states and 262 transitions. Second operand has 64 states, 64 states have (on average 2.078125) internal successors, (133), 63 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:48,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:57:48,742 INFO L93 Difference]: Finished difference Result 399 states and 404 transitions. [2022-01-31 17:57:48,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-31 17:57:48,743 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.078125) internal successors, (133), 63 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 255 [2022-01-31 17:57:48,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:57:48,744 INFO L225 Difference]: With dead ends: 399 [2022-01-31 17:57:48,744 INFO L226 Difference]: Without dead ends: 266 [2022-01-31 17:57:48,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1890 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=5859, Invalid=9641, Unknown=0, NotChecked=0, Total=15500 [2022-01-31 17:57:48,745 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 426 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 357 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 357 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:57:48,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [427 Valid, 41 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [357 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:57:48,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-01-31 17:57:48,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 264. [2022-01-31 17:57:48,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 258 states have (on average 1.0116279069767442) internal successors, (261), 258 states have internal predecessors, (261), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:57:48,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 266 transitions. [2022-01-31 17:57:48,826 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 266 transitions. Word has length 255 [2022-01-31 17:57:48,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:57:48,826 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 266 transitions. [2022-01-31 17:57:48,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.078125) internal successors, (133), 63 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:48,826 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 266 transitions. [2022-01-31 17:57:48,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2022-01-31 17:57:48,827 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:57:48,827 INFO L514 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:57:48,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-01-31 17:57:48,827 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:57:48,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:57:48,828 INFO L85 PathProgramCache]: Analyzing trace with hash -730783553, now seen corresponding path program 61 times [2022-01-31 17:57:48,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:57:48,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [91710159] [2022-01-31 17:57:48,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:57:48,830 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:57:48,830 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:57:48,830 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:57:48,835 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:57:48,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:50,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:57:50,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:50,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:57:50,218 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:57:50,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [91710159] [2022-01-31 17:57:50,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [91710159] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:57:50,218 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:57:50,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-01-31 17:57:50,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198669547] [2022-01-31 17:57:50,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:57:50,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-01-31 17:57:50,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:57:50,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-01-31 17:57:50,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 17:57:50,219 INFO L87 Difference]: Start difference. First operand 264 states and 266 transitions. Second operand has 65 states, 65 states have (on average 2.076923076923077) internal successors, (135), 64 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:52,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:57:52,087 INFO L93 Difference]: Finished difference Result 405 states and 410 transitions. [2022-01-31 17:57:52,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-31 17:57:52,087 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.076923076923077) internal successors, (135), 64 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 259 [2022-01-31 17:57:52,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:57:52,088 INFO L225 Difference]: With dead ends: 405 [2022-01-31 17:57:52,088 INFO L226 Difference]: Without dead ends: 270 [2022-01-31 17:57:52,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1952 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=6048, Invalid=9954, Unknown=0, NotChecked=0, Total=16002 [2022-01-31 17:57:52,089 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 417 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 346 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 346 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:57:52,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [418 Valid, 46 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [346 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:57:52,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-01-31 17:57:52,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 268. [2022-01-31 17:57:52,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 262 states have (on average 1.0114503816793894) internal successors, (265), 262 states have internal predecessors, (265), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:57:52,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 270 transitions. [2022-01-31 17:57:52,165 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 270 transitions. Word has length 259 [2022-01-31 17:57:52,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:57:52,166 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 270 transitions. [2022-01-31 17:57:52,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.076923076923077) internal successors, (135), 64 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:52,166 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 270 transitions. [2022-01-31 17:57:52,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2022-01-31 17:57:52,167 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:57:52,167 INFO L514 BasicCegarLoop]: trace histogram [62, 62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:57:52,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-01-31 17:57:52,167 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:57:52,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:57:52,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1316215611, now seen corresponding path program 62 times [2022-01-31 17:57:52,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:57:52,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1780865168] [2022-01-31 17:57:52,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:57:52,169 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:57:52,169 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:57:52,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:57:52,175 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:57:52,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:53,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:57:53,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:53,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:57:53,559 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:57:53,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1780865168] [2022-01-31 17:57:53,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1780865168] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:57:53,559 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:57:53,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-01-31 17:57:53,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418860891] [2022-01-31 17:57:53,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:57:53,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-01-31 17:57:53,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:57:53,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-01-31 17:57:53,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 17:57:53,561 INFO L87 Difference]: Start difference. First operand 268 states and 270 transitions. Second operand has 66 states, 66 states have (on average 2.0757575757575757) internal successors, (137), 65 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:55,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:57:55,511 INFO L93 Difference]: Finished difference Result 411 states and 416 transitions. [2022-01-31 17:57:55,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-31 17:57:55,511 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.0757575757575757) internal successors, (137), 65 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 263 [2022-01-31 17:57:55,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:57:55,512 INFO L225 Difference]: With dead ends: 411 [2022-01-31 17:57:55,512 INFO L226 Difference]: Without dead ends: 274 [2022-01-31 17:57:55,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2015 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=6240, Invalid=10272, Unknown=0, NotChecked=0, Total=16512 [2022-01-31 17:57:55,513 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 488 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 417 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 417 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:57:55,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [489 Valid, 51 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [417 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:57:55,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2022-01-31 17:57:55,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 272. [2022-01-31 17:57:55,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 266 states have (on average 1.0112781954887218) internal successors, (269), 266 states have internal predecessors, (269), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:57:55,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 274 transitions. [2022-01-31 17:57:55,580 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 274 transitions. Word has length 263 [2022-01-31 17:57:55,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:57:55,581 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 274 transitions. [2022-01-31 17:57:55,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.0757575757575757) internal successors, (137), 65 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:55,581 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 274 transitions. [2022-01-31 17:57:55,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2022-01-31 17:57:55,582 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:57:55,582 INFO L514 BasicCegarLoop]: trace histogram [63, 63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:57:55,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-01-31 17:57:55,582 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:57:55,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:57:55,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1138354103, now seen corresponding path program 63 times [2022-01-31 17:57:55,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:57:55,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1554516454] [2022-01-31 17:57:55,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:57:55,584 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:57:55,584 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:57:55,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:57:55,589 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:57:55,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:57,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:57:57,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:57,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:57:57,006 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:57:57,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1554516454] [2022-01-31 17:57:57,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1554516454] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:57:57,006 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:57:57,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-01-31 17:57:57,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451077953] [2022-01-31 17:57:57,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:57:57,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-01-31 17:57:57,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:57:57,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-01-31 17:57:57,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 17:57:57,008 INFO L87 Difference]: Start difference. First operand 272 states and 274 transitions. Second operand has 67 states, 67 states have (on average 2.074626865671642) internal successors, (139), 66 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:59,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:57:59,006 INFO L93 Difference]: Finished difference Result 417 states and 422 transitions. [2022-01-31 17:57:59,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-31 17:57:59,006 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.074626865671642) internal successors, (139), 66 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 267 [2022-01-31 17:57:59,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:57:59,007 INFO L225 Difference]: With dead ends: 417 [2022-01-31 17:57:59,007 INFO L226 Difference]: Without dead ends: 278 [2022-01-31 17:57:59,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2079 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=6435, Invalid=10595, Unknown=0, NotChecked=0, Total=17030 [2022-01-31 17:57:59,008 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 495 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 425 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 425 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:57:59,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [496 Valid, 41 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [425 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:57:59,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-01-31 17:57:59,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 276. [2022-01-31 17:57:59,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 270 states have (on average 1.011111111111111) internal successors, (273), 270 states have internal predecessors, (273), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:57:59,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 278 transitions. [2022-01-31 17:57:59,085 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 278 transitions. Word has length 267 [2022-01-31 17:57:59,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:57:59,085 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 278 transitions. [2022-01-31 17:57:59,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.074626865671642) internal successors, (139), 66 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:59,085 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 278 transitions. [2022-01-31 17:57:59,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2022-01-31 17:57:59,086 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:57:59,086 INFO L514 BasicCegarLoop]: trace histogram [64, 64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:57:59,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-01-31 17:57:59,086 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:57:59,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:57:59,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1557248461, now seen corresponding path program 64 times [2022-01-31 17:57:59,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:57:59,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1994185082] [2022-01-31 17:57:59,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:57:59,088 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:57:59,088 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:57:59,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:57:59,093 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:57:59,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:00,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:00,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:00,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:00,586 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:00,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1994185082] [2022-01-31 17:58:00,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1994185082] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:00,586 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:00,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-01-31 17:58:00,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67598399] [2022-01-31 17:58:00,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:00,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-01-31 17:58:00,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:00,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-01-31 17:58:00,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 17:58:00,588 INFO L87 Difference]: Start difference. First operand 276 states and 278 transitions. Second operand has 68 states, 68 states have (on average 2.073529411764706) internal successors, (141), 67 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:02,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:02,663 INFO L93 Difference]: Finished difference Result 423 states and 428 transitions. [2022-01-31 17:58:02,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-31 17:58:02,663 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.073529411764706) internal successors, (141), 67 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 271 [2022-01-31 17:58:02,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:02,664 INFO L225 Difference]: With dead ends: 423 [2022-01-31 17:58:02,664 INFO L226 Difference]: Without dead ends: 282 [2022-01-31 17:58:02,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2144 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=6633, Invalid=10923, Unknown=0, NotChecked=0, Total=17556 [2022-01-31 17:58:02,665 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 422 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 347 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 347 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:02,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [423 Valid, 46 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [347 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:58:02,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-01-31 17:58:02,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 280. [2022-01-31 17:58:02,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 274 states have (on average 1.010948905109489) internal successors, (277), 274 states have internal predecessors, (277), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:02,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 282 transitions. [2022-01-31 17:58:02,758 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 282 transitions. Word has length 271 [2022-01-31 17:58:02,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:02,758 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 282 transitions. [2022-01-31 17:58:02,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.073529411764706) internal successors, (141), 67 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:02,759 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 282 transitions. [2022-01-31 17:58:02,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2022-01-31 17:58:02,760 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:02,760 INFO L514 BasicCegarLoop]: trace histogram [65, 65, 65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:02,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-01-31 17:58:02,760 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:02,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:02,760 INFO L85 PathProgramCache]: Analyzing trace with hash 209450671, now seen corresponding path program 65 times [2022-01-31 17:58:02,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:02,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [965292300] [2022-01-31 17:58:02,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:02,762 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:02,762 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:02,762 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:02,768 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:02,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:04,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:04,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:04,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:04,320 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:04,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [965292300] [2022-01-31 17:58:04,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [965292300] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:04,320 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:04,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-01-31 17:58:04,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176454353] [2022-01-31 17:58:04,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:04,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-01-31 17:58:04,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:04,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-01-31 17:58:04,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 17:58:04,322 INFO L87 Difference]: Start difference. First operand 280 states and 282 transitions. Second operand has 69 states, 69 states have (on average 2.072463768115942) internal successors, (143), 68 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:06,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:06,461 INFO L93 Difference]: Finished difference Result 429 states and 434 transitions. [2022-01-31 17:58:06,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-31 17:58:06,461 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.072463768115942) internal successors, (143), 68 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 275 [2022-01-31 17:58:06,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:06,462 INFO L225 Difference]: With dead ends: 429 [2022-01-31 17:58:06,462 INFO L226 Difference]: Without dead ends: 286 [2022-01-31 17:58:06,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2210 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=6834, Invalid=11256, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 17:58:06,463 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 433 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 357 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 357 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:06,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [434 Valid, 51 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [357 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:58:06,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2022-01-31 17:58:06,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 284. [2022-01-31 17:58:06,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 278 states have (on average 1.0107913669064748) internal successors, (281), 278 states have internal predecessors, (281), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:06,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 286 transitions. [2022-01-31 17:58:06,527 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 286 transitions. Word has length 275 [2022-01-31 17:58:06,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:06,527 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 286 transitions. [2022-01-31 17:58:06,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.072463768115942) internal successors, (143), 68 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:06,528 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 286 transitions. [2022-01-31 17:58:06,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2022-01-31 17:58:06,528 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:06,529 INFO L514 BasicCegarLoop]: trace histogram [66, 66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:06,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-01-31 17:58:06,529 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:06,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:06,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1364064555, now seen corresponding path program 66 times [2022-01-31 17:58:06,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:06,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2089173676] [2022-01-31 17:58:06,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:06,531 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:06,531 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:06,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:06,536 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:06,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:08,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:08,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:08,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:08,097 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:08,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2089173676] [2022-01-31 17:58:08,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2089173676] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:08,097 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:08,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-01-31 17:58:08,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133407572] [2022-01-31 17:58:08,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:08,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-01-31 17:58:08,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:08,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-01-31 17:58:08,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2022-01-31 17:58:08,099 INFO L87 Difference]: Start difference. First operand 284 states and 286 transitions. Second operand has 70 states, 70 states have (on average 2.0714285714285716) internal successors, (145), 69 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:10,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:10,286 INFO L93 Difference]: Finished difference Result 435 states and 440 transitions. [2022-01-31 17:58:10,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-31 17:58:10,287 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.0714285714285716) internal successors, (145), 69 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 279 [2022-01-31 17:58:10,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:10,288 INFO L225 Difference]: With dead ends: 435 [2022-01-31 17:58:10,288 INFO L226 Difference]: Without dead ends: 290 [2022-01-31 17:58:10,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2277 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=7038, Invalid=11594, Unknown=0, NotChecked=0, Total=18632 [2022-01-31 17:58:10,289 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 422 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 343 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 343 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:10,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [423 Valid, 56 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [343 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:58:10,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-01-31 17:58:10,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 288. [2022-01-31 17:58:10,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 282 states have (on average 1.0106382978723405) internal successors, (285), 282 states have internal predecessors, (285), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:10,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 290 transitions. [2022-01-31 17:58:10,355 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 290 transitions. Word has length 279 [2022-01-31 17:58:10,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:10,355 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 290 transitions. [2022-01-31 17:58:10,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.0714285714285716) internal successors, (145), 69 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:10,355 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 290 transitions. [2022-01-31 17:58:10,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2022-01-31 17:58:10,357 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:10,357 INFO L514 BasicCegarLoop]: trace histogram [67, 67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:10,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-01-31 17:58:10,357 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:10,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:10,357 INFO L85 PathProgramCache]: Analyzing trace with hash -189837913, now seen corresponding path program 67 times [2022-01-31 17:58:10,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:10,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1831737906] [2022-01-31 17:58:10,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:10,359 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:10,359 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:10,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:10,365 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:10,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:11,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:11,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:11,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:11,948 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:11,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1831737906] [2022-01-31 17:58:11,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1831737906] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:11,948 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:11,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-01-31 17:58:11,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620972566] [2022-01-31 17:58:11,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:11,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-01-31 17:58:11,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:11,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-01-31 17:58:11,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 17:58:11,950 INFO L87 Difference]: Start difference. First operand 288 states and 290 transitions. Second operand has 71 states, 71 states have (on average 2.0704225352112675) internal successors, (147), 70 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:14,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:14,181 INFO L93 Difference]: Finished difference Result 441 states and 446 transitions. [2022-01-31 17:58:14,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-31 17:58:14,182 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.0704225352112675) internal successors, (147), 70 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 283 [2022-01-31 17:58:14,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:14,182 INFO L225 Difference]: With dead ends: 441 [2022-01-31 17:58:14,182 INFO L226 Difference]: Without dead ends: 294 [2022-01-31 17:58:14,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2345 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=7245, Invalid=11937, Unknown=0, NotChecked=0, Total=19182 [2022-01-31 17:58:14,184 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 485 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 409 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 409 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:14,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [486 Valid, 41 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [409 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:58:14,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-01-31 17:58:14,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 292. [2022-01-31 17:58:14,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 286 states have (on average 1.0104895104895104) internal successors, (289), 286 states have internal predecessors, (289), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:14,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 294 transitions. [2022-01-31 17:58:14,274 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 294 transitions. Word has length 283 [2022-01-31 17:58:14,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:14,274 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 294 transitions. [2022-01-31 17:58:14,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.0704225352112675) internal successors, (147), 70 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:14,275 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 294 transitions. [2022-01-31 17:58:14,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2022-01-31 17:58:14,276 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:14,276 INFO L514 BasicCegarLoop]: trace histogram [68, 68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:14,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-01-31 17:58:14,276 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:14,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:14,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1423248349, now seen corresponding path program 68 times [2022-01-31 17:58:14,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:14,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [237200405] [2022-01-31 17:58:14,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:14,278 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:14,278 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:14,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:14,285 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:14,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:15,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:15,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:15,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:15,924 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:15,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [237200405] [2022-01-31 17:58:15,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [237200405] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:15,924 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:15,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-01-31 17:58:15,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495438408] [2022-01-31 17:58:15,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:15,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-01-31 17:58:15,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:15,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-01-31 17:58:15,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 17:58:15,926 INFO L87 Difference]: Start difference. First operand 292 states and 294 transitions. Second operand has 72 states, 72 states have (on average 2.0694444444444446) internal successors, (149), 71 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:18,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:18,227 INFO L93 Difference]: Finished difference Result 447 states and 452 transitions. [2022-01-31 17:58:18,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-31 17:58:18,227 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.0694444444444446) internal successors, (149), 71 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 287 [2022-01-31 17:58:18,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:18,228 INFO L225 Difference]: With dead ends: 447 [2022-01-31 17:58:18,228 INFO L226 Difference]: Without dead ends: 298 [2022-01-31 17:58:18,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2414 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=7455, Invalid=12285, Unknown=0, NotChecked=0, Total=19740 [2022-01-31 17:58:18,229 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 483 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 405 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 405 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:18,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [484 Valid, 36 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [405 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:58:18,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2022-01-31 17:58:18,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 296. [2022-01-31 17:58:18,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 290 states have (on average 1.0103448275862068) internal successors, (293), 290 states have internal predecessors, (293), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:18,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 298 transitions. [2022-01-31 17:58:18,311 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 298 transitions. Word has length 287 [2022-01-31 17:58:18,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:18,311 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 298 transitions. [2022-01-31 17:58:18,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.0694444444444446) internal successors, (149), 71 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:18,311 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 298 transitions. [2022-01-31 17:58:18,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2022-01-31 17:58:18,313 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:18,313 INFO L514 BasicCegarLoop]: trace histogram [69, 69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:18,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-01-31 17:58:18,313 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:18,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:18,313 INFO L85 PathProgramCache]: Analyzing trace with hash -624169825, now seen corresponding path program 69 times [2022-01-31 17:58:18,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:18,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [876741610] [2022-01-31 17:58:18,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:18,315 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:18,315 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:18,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:18,323 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:18,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:20,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:20,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:20,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:20,124 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:20,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [876741610] [2022-01-31 17:58:20,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [876741610] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:20,124 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:20,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-01-31 17:58:20,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752656796] [2022-01-31 17:58:20,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:20,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-01-31 17:58:20,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:20,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-01-31 17:58:20,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 17:58:20,126 INFO L87 Difference]: Start difference. First operand 296 states and 298 transitions. Second operand has 73 states, 73 states have (on average 2.0684931506849313) internal successors, (151), 72 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:22,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:22,511 INFO L93 Difference]: Finished difference Result 453 states and 458 transitions. [2022-01-31 17:58:22,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-31 17:58:22,511 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.0684931506849313) internal successors, (151), 72 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 291 [2022-01-31 17:58:22,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:22,512 INFO L225 Difference]: With dead ends: 453 [2022-01-31 17:58:22,513 INFO L226 Difference]: Without dead ends: 302 [2022-01-31 17:58:22,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2484 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=7668, Invalid=12638, Unknown=0, NotChecked=0, Total=20306 [2022-01-31 17:58:22,514 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 477 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 399 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 478 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 399 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:22,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [478 Valid, 41 Invalid, 737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [399 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:58:22,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-01-31 17:58:22,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 300. [2022-01-31 17:58:22,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 294 states have (on average 1.010204081632653) internal successors, (297), 294 states have internal predecessors, (297), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:22,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 302 transitions. [2022-01-31 17:58:22,588 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 302 transitions. Word has length 291 [2022-01-31 17:58:22,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:22,588 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 302 transitions. [2022-01-31 17:58:22,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.0684931506849313) internal successors, (151), 72 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:22,588 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 302 transitions. [2022-01-31 17:58:22,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2022-01-31 17:58:22,589 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:22,589 INFO L514 BasicCegarLoop]: trace histogram [70, 70, 70, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:22,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-01-31 17:58:22,589 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:22,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:22,589 INFO L85 PathProgramCache]: Analyzing trace with hash 454899483, now seen corresponding path program 70 times [2022-01-31 17:58:22,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:22,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [182790941] [2022-01-31 17:58:22,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:22,591 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:22,591 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:22,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:22,596 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:22,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:24,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:24,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:24,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:24,331 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:24,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [182790941] [2022-01-31 17:58:24,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [182790941] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:24,331 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:24,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-01-31 17:58:24,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9775789] [2022-01-31 17:58:24,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:24,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-01-31 17:58:24,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:24,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-01-31 17:58:24,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 17:58:24,333 INFO L87 Difference]: Start difference. First operand 300 states and 302 transitions. Second operand has 74 states, 74 states have (on average 2.0675675675675675) internal successors, (153), 73 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:26,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:26,843 INFO L93 Difference]: Finished difference Result 459 states and 464 transitions. [2022-01-31 17:58:26,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-31 17:58:26,843 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.0675675675675675) internal successors, (153), 73 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 295 [2022-01-31 17:58:26,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:26,846 INFO L225 Difference]: With dead ends: 459 [2022-01-31 17:58:26,846 INFO L226 Difference]: Without dead ends: 306 [2022-01-31 17:58:26,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2555 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=7884, Invalid=12996, Unknown=0, NotChecked=0, Total=20880 [2022-01-31 17:58:26,848 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 495 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 414 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 414 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:26,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [496 Valid, 46 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [414 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:58:26,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2022-01-31 17:58:26,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 304. [2022-01-31 17:58:26,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 298 states have (on average 1.0100671140939597) internal successors, (301), 298 states have internal predecessors, (301), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:26,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 306 transitions. [2022-01-31 17:58:26,936 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 306 transitions. Word has length 295 [2022-01-31 17:58:26,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:26,937 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 306 transitions. [2022-01-31 17:58:26,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.0675675675675675) internal successors, (153), 73 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:26,937 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 306 transitions. [2022-01-31 17:58:26,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2022-01-31 17:58:26,938 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:26,938 INFO L514 BasicCegarLoop]: trace histogram [71, 71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:26,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-01-31 17:58:26,938 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:26,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:26,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1255550057, now seen corresponding path program 71 times [2022-01-31 17:58:26,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:26,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1617544990] [2022-01-31 17:58:26,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:26,940 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:26,940 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:26,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:26,946 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:26,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:28,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:28,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:28,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:28,664 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:28,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1617544990] [2022-01-31 17:58:28,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1617544990] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:28,675 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:28,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-01-31 17:58:28,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792878922] [2022-01-31 17:58:28,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:28,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-01-31 17:58:28,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:28,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-01-31 17:58:28,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 17:58:28,676 INFO L87 Difference]: Start difference. First operand 304 states and 306 transitions. Second operand has 75 states, 75 states have (on average 2.066666666666667) internal successors, (155), 74 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:31,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:31,171 INFO L93 Difference]: Finished difference Result 465 states and 470 transitions. [2022-01-31 17:58:31,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-31 17:58:31,172 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.066666666666667) internal successors, (155), 74 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 299 [2022-01-31 17:58:31,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:31,172 INFO L225 Difference]: With dead ends: 465 [2022-01-31 17:58:31,172 INFO L226 Difference]: Without dead ends: 310 [2022-01-31 17:58:31,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2627 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=8103, Invalid=13359, Unknown=0, NotChecked=0, Total=21462 [2022-01-31 17:58:31,174 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 568 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 487 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 569 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 487 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:31,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [569 Valid, 36 Invalid, 820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [487 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:58:31,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2022-01-31 17:58:31,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 308. [2022-01-31 17:58:31,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 302 states have (on average 1.009933774834437) internal successors, (305), 302 states have internal predecessors, (305), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:31,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 310 transitions. [2022-01-31 17:58:31,249 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 310 transitions. Word has length 299 [2022-01-31 17:58:31,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:31,249 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 310 transitions. [2022-01-31 17:58:31,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.066666666666667) internal successors, (155), 74 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:31,250 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 310 transitions. [2022-01-31 17:58:31,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2022-01-31 17:58:31,251 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:31,251 INFO L514 BasicCegarLoop]: trace histogram [72, 72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:31,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-01-31 17:58:31,251 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:31,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:31,251 INFO L85 PathProgramCache]: Analyzing trace with hash 595378707, now seen corresponding path program 72 times [2022-01-31 17:58:31,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:31,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [956518970] [2022-01-31 17:58:31,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:31,253 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:31,253 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:31,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:31,258 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:31,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:33,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:33,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:33,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:33,058 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:33,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [956518970] [2022-01-31 17:58:33,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [956518970] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:33,058 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:33,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-01-31 17:58:33,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813519420] [2022-01-31 17:58:33,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:33,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-01-31 17:58:33,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:33,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-01-31 17:58:33,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 17:58:33,060 INFO L87 Difference]: Start difference. First operand 308 states and 310 transitions. Second operand has 76 states, 76 states have (on average 2.0657894736842106) internal successors, (157), 75 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:35,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:35,626 INFO L93 Difference]: Finished difference Result 471 states and 476 transitions. [2022-01-31 17:58:35,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-31 17:58:35,626 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.0657894736842106) internal successors, (157), 75 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 303 [2022-01-31 17:58:35,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:35,627 INFO L225 Difference]: With dead ends: 471 [2022-01-31 17:58:35,627 INFO L226 Difference]: Without dead ends: 314 [2022-01-31 17:58:35,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2700 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=8325, Invalid=13727, Unknown=0, NotChecked=0, Total=22052 [2022-01-31 17:58:35,628 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 548 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 466 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 549 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 466 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:35,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [549 Valid, 41 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [466 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:58:35,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-01-31 17:58:35,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 312. [2022-01-31 17:58:35,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 306 states have (on average 1.0098039215686274) internal successors, (309), 306 states have internal predecessors, (309), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:35,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 314 transitions. [2022-01-31 17:58:35,695 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 314 transitions. Word has length 303 [2022-01-31 17:58:35,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:35,695 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 314 transitions. [2022-01-31 17:58:35,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.0657894736842106) internal successors, (157), 75 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:35,695 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 314 transitions. [2022-01-31 17:58:35,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2022-01-31 17:58:35,696 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:35,696 INFO L514 BasicCegarLoop]: trace histogram [73, 73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:35,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-01-31 17:58:35,696 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:35,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:35,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1843330417, now seen corresponding path program 73 times [2022-01-31 17:58:35,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:35,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1765568198] [2022-01-31 17:58:35,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:35,698 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:35,698 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:35,698 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:35,705 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:35,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:37,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:37,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:37,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:37,537 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:37,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1765568198] [2022-01-31 17:58:37,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1765568198] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:37,537 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:37,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-01-31 17:58:37,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887829138] [2022-01-31 17:58:37,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:37,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-01-31 17:58:37,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:37,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-01-31 17:58:37,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 17:58:37,539 INFO L87 Difference]: Start difference. First operand 312 states and 314 transitions. Second operand has 77 states, 77 states have (on average 2.064935064935065) internal successors, (159), 76 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:40,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:40,160 INFO L93 Difference]: Finished difference Result 477 states and 482 transitions. [2022-01-31 17:58:40,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-31 17:58:40,160 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.064935064935065) internal successors, (159), 76 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 307 [2022-01-31 17:58:40,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:40,161 INFO L225 Difference]: With dead ends: 477 [2022-01-31 17:58:40,161 INFO L226 Difference]: Without dead ends: 318 [2022-01-31 17:58:40,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2774 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=8550, Invalid=14100, Unknown=0, NotChecked=0, Total=22650 [2022-01-31 17:58:40,162 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 563 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 480 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 480 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:40,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [564 Valid, 46 Invalid, 847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [480 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:58:40,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-01-31 17:58:40,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 316. [2022-01-31 17:58:40,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 310 states have (on average 1.0096774193548388) internal successors, (313), 310 states have internal predecessors, (313), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:40,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 318 transitions. [2022-01-31 17:58:40,242 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 318 transitions. Word has length 307 [2022-01-31 17:58:40,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:40,242 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 318 transitions. [2022-01-31 17:58:40,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.064935064935065) internal successors, (159), 76 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:40,242 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 318 transitions. [2022-01-31 17:58:40,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2022-01-31 17:58:40,243 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:40,243 INFO L514 BasicCegarLoop]: trace histogram [74, 74, 74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:40,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-01-31 17:58:40,243 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:40,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:40,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1587647755, now seen corresponding path program 74 times [2022-01-31 17:58:40,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:40,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [88398778] [2022-01-31 17:58:40,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:40,245 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:40,245 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:40,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:40,252 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:40,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:42,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:42,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:42,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:42,121 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:42,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [88398778] [2022-01-31 17:58:42,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [88398778] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:42,121 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:42,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-01-31 17:58:42,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015307683] [2022-01-31 17:58:42,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:42,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-01-31 17:58:42,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:42,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-01-31 17:58:42,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 17:58:42,123 INFO L87 Difference]: Start difference. First operand 316 states and 318 transitions. Second operand has 78 states, 78 states have (on average 2.0641025641025643) internal successors, (161), 77 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:44,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:44,782 INFO L93 Difference]: Finished difference Result 483 states and 488 transitions. [2022-01-31 17:58:44,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-31 17:58:44,783 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.0641025641025643) internal successors, (161), 77 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 311 [2022-01-31 17:58:44,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:44,784 INFO L225 Difference]: With dead ends: 483 [2022-01-31 17:58:44,784 INFO L226 Difference]: Without dead ends: 322 [2022-01-31 17:58:44,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2849 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=8778, Invalid=14478, Unknown=0, NotChecked=0, Total=23256 [2022-01-31 17:58:44,785 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 474 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 387 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 387 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:44,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [475 Valid, 61 Invalid, 797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [387 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:58:44,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2022-01-31 17:58:44,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 320. [2022-01-31 17:58:44,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 314 states have (on average 1.0095541401273886) internal successors, (317), 314 states have internal predecessors, (317), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:44,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 322 transitions. [2022-01-31 17:58:44,862 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 322 transitions. Word has length 311 [2022-01-31 17:58:44,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:44,862 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 322 transitions. [2022-01-31 17:58:44,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.0641025641025643) internal successors, (161), 77 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:44,862 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 322 transitions. [2022-01-31 17:58:44,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2022-01-31 17:58:44,864 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:44,864 INFO L514 BasicCegarLoop]: trace histogram [75, 75, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:44,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-01-31 17:58:44,864 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:44,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:44,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1744209529, now seen corresponding path program 75 times [2022-01-31 17:58:44,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:44,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1858493310] [2022-01-31 17:58:44,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:44,867 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:44,867 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:44,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:44,875 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:44,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:46,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:46,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:46,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:46,919 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:46,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1858493310] [2022-01-31 17:58:46,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1858493310] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:46,919 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:46,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-01-31 17:58:46,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310594265] [2022-01-31 17:58:46,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:46,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-01-31 17:58:46,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:46,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-01-31 17:58:46,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3005, Invalid=3157, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 17:58:46,922 INFO L87 Difference]: Start difference. First operand 320 states and 322 transitions. Second operand has 79 states, 79 states have (on average 2.0632911392405062) internal successors, (163), 78 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:49,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:49,661 INFO L93 Difference]: Finished difference Result 489 states and 494 transitions. [2022-01-31 17:58:49,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-31 17:58:49,661 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.0632911392405062) internal successors, (163), 78 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 315 [2022-01-31 17:58:49,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:49,662 INFO L225 Difference]: With dead ends: 489 [2022-01-31 17:58:49,662 INFO L226 Difference]: Without dead ends: 326 [2022-01-31 17:58:49,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2925 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=9009, Invalid=14861, Unknown=0, NotChecked=0, Total=23870 [2022-01-31 17:58:49,663 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 538 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 453 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 453 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:49,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [539 Valid, 46 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [453 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:58:49,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-01-31 17:58:49,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 324. [2022-01-31 17:58:49,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 318 states have (on average 1.009433962264151) internal successors, (321), 318 states have internal predecessors, (321), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:49,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 326 transitions. [2022-01-31 17:58:49,743 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 326 transitions. Word has length 315 [2022-01-31 17:58:49,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:49,743 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 326 transitions. [2022-01-31 17:58:49,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.0632911392405062) internal successors, (163), 78 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:49,743 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 326 transitions. [2022-01-31 17:58:49,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2022-01-31 17:58:49,744 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:49,744 INFO L514 BasicCegarLoop]: trace histogram [76, 76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:49,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-01-31 17:58:49,744 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:49,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:49,745 INFO L85 PathProgramCache]: Analyzing trace with hash 2128850947, now seen corresponding path program 76 times [2022-01-31 17:58:49,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:49,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1248499725] [2022-01-31 17:58:49,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:49,746 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:49,746 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:49,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:49,752 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:49,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:51,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:51,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:51,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:51,748 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:51,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1248499725] [2022-01-31 17:58:51,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1248499725] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:51,748 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:51,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-01-31 17:58:51,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053261515] [2022-01-31 17:58:51,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:51,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-01-31 17:58:51,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:51,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-01-31 17:58:51,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 17:58:51,750 INFO L87 Difference]: Start difference. First operand 324 states and 326 transitions. Second operand has 80 states, 80 states have (on average 2.0625) internal successors, (165), 79 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:54,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:54,595 INFO L93 Difference]: Finished difference Result 495 states and 500 transitions. [2022-01-31 17:58:54,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-01-31 17:58:54,596 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.0625) internal successors, (165), 79 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 319 [2022-01-31 17:58:54,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:54,597 INFO L225 Difference]: With dead ends: 495 [2022-01-31 17:58:54,597 INFO L226 Difference]: Without dead ends: 330 [2022-01-31 17:58:54,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3002 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=9243, Invalid=15249, Unknown=0, NotChecked=0, Total=24492 [2022-01-31 17:58:54,598 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 573 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 489 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 574 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 489 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:54,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [574 Valid, 51 Invalid, 881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [489 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:58:54,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-01-31 17:58:54,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 328. [2022-01-31 17:58:54,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 322 states have (on average 1.0093167701863355) internal successors, (325), 322 states have internal predecessors, (325), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:54,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 330 transitions. [2022-01-31 17:58:54,684 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 330 transitions. Word has length 319 [2022-01-31 17:58:54,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:54,684 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 330 transitions. [2022-01-31 17:58:54,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.0625) internal successors, (165), 79 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:54,685 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 330 transitions. [2022-01-31 17:58:54,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2022-01-31 17:58:54,686 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:54,686 INFO L514 BasicCegarLoop]: trace histogram [77, 77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:54,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-01-31 17:58:54,686 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:54,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:54,686 INFO L85 PathProgramCache]: Analyzing trace with hash 87767167, now seen corresponding path program 77 times [2022-01-31 17:58:54,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:54,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1125222868] [2022-01-31 17:58:54,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:54,688 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:54,688 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:54,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:54,694 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:54,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:56,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:56,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:56,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:56,732 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:56,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1125222868] [2022-01-31 17:58:56,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1125222868] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:56,732 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:56,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-01-31 17:58:56,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956642255] [2022-01-31 17:58:56,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:56,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-01-31 17:58:56,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:56,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-01-31 17:58:56,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3162, Invalid=3318, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 17:58:56,734 INFO L87 Difference]: Start difference. First operand 328 states and 330 transitions. Second operand has 81 states, 81 states have (on average 2.0617283950617282) internal successors, (167), 80 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:59,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:59,674 INFO L93 Difference]: Finished difference Result 501 states and 506 transitions. [2022-01-31 17:58:59,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-01-31 17:58:59,675 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.0617283950617282) internal successors, (167), 80 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 323 [2022-01-31 17:58:59,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:59,675 INFO L225 Difference]: With dead ends: 501 [2022-01-31 17:58:59,675 INFO L226 Difference]: Without dead ends: 334 [2022-01-31 17:58:59,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3080 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=9480, Invalid=15642, Unknown=0, NotChecked=0, Total=25122 [2022-01-31 17:58:59,677 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 581 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 494 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 582 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 494 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:59,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [582 Valid, 51 Invalid, 890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [494 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:58:59,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2022-01-31 17:58:59,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 332. [2022-01-31 17:58:59,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 326 states have (on average 1.00920245398773) internal successors, (329), 326 states have internal predecessors, (329), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:59,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 334 transitions. [2022-01-31 17:58:59,753 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 334 transitions. Word has length 323 [2022-01-31 17:58:59,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:59,754 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 334 transitions. [2022-01-31 17:58:59,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.0617283950617282) internal successors, (167), 80 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:59,754 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 334 transitions. [2022-01-31 17:58:59,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2022-01-31 17:58:59,755 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:59,755 INFO L514 BasicCegarLoop]: trace histogram [78, 78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:59,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-01-31 17:58:59,755 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:59,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:59,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1318785787, now seen corresponding path program 78 times [2022-01-31 17:58:59,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:59,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [87659308] [2022-01-31 17:58:59,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:59,757 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:59,757 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:59,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:59,763 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:59,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:01,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:01,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:01,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:59:01,833 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:01,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [87659308] [2022-01-31 17:59:01,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [87659308] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:01,834 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:01,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-01-31 17:59:01,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823840400] [2022-01-31 17:59:01,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:01,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-01-31 17:59:01,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:01,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-01-31 17:59:01,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2022-01-31 17:59:01,836 INFO L87 Difference]: Start difference. First operand 332 states and 334 transitions. Second operand has 82 states, 82 states have (on average 2.0609756097560976) internal successors, (169), 81 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:04,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:04,833 INFO L93 Difference]: Finished difference Result 507 states and 512 transitions. [2022-01-31 17:59:04,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-31 17:59:04,833 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.0609756097560976) internal successors, (169), 81 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 327 [2022-01-31 17:59:04,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:04,834 INFO L225 Difference]: With dead ends: 507 [2022-01-31 17:59:04,834 INFO L226 Difference]: Without dead ends: 338 [2022-01-31 17:59:04,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3159 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=9720, Invalid=16040, Unknown=0, NotChecked=0, Total=25760 [2022-01-31 17:59:04,835 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 488 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 400 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 400 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:04,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [489 Valid, 61 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [400 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:59:04,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-01-31 17:59:04,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 336. [2022-01-31 17:59:04,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 330 states have (on average 1.009090909090909) internal successors, (333), 330 states have internal predecessors, (333), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:59:04,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 338 transitions. [2022-01-31 17:59:04,914 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 338 transitions. Word has length 327 [2022-01-31 17:59:04,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:04,914 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 338 transitions. [2022-01-31 17:59:04,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.0609756097560976) internal successors, (169), 81 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:04,914 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 338 transitions. [2022-01-31 17:59:04,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2022-01-31 17:59:04,915 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:04,915 INFO L514 BasicCegarLoop]: trace histogram [79, 79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:04,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-01-31 17:59:04,915 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:04,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:04,916 INFO L85 PathProgramCache]: Analyzing trace with hash 806240119, now seen corresponding path program 79 times [2022-01-31 17:59:04,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:04,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [663515376] [2022-01-31 17:59:04,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:04,917 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:04,917 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:04,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:04,924 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:04,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:07,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:07,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:07,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:59:07,046 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:07,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [663515376] [2022-01-31 17:59:07,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [663515376] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:07,046 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:07,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-01-31 17:59:07,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944171266] [2022-01-31 17:59:07,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:07,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-01-31 17:59:07,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:07,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-01-31 17:59:07,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3323, Invalid=3483, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 17:59:07,048 INFO L87 Difference]: Start difference. First operand 336 states and 338 transitions. Second operand has 83 states, 83 states have (on average 2.0602409638554215) internal successors, (171), 82 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:10,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:10,108 INFO L93 Difference]: Finished difference Result 513 states and 518 transitions. [2022-01-31 17:59:10,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-01-31 17:59:10,109 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.0602409638554215) internal successors, (171), 82 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 331 [2022-01-31 17:59:10,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:10,109 INFO L225 Difference]: With dead ends: 513 [2022-01-31 17:59:10,109 INFO L226 Difference]: Without dead ends: 342 [2022-01-31 17:59:10,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3239 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=9963, Invalid=16443, Unknown=0, NotChecked=0, Total=26406 [2022-01-31 17:59:10,111 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 568 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 476 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 569 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 476 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:10,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [569 Valid, 41 Invalid, 854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [476 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:59:10,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2022-01-31 17:59:10,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 340. [2022-01-31 17:59:10,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 334 states have (on average 1.0089820359281436) internal successors, (337), 334 states have internal predecessors, (337), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:59:10,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 342 transitions. [2022-01-31 17:59:10,191 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 342 transitions. Word has length 331 [2022-01-31 17:59:10,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:10,191 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 342 transitions. [2022-01-31 17:59:10,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.0602409638554215) internal successors, (171), 82 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:10,191 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 342 transitions. [2022-01-31 17:59:10,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2022-01-31 17:59:10,192 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:10,193 INFO L514 BasicCegarLoop]: trace histogram [80, 80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:10,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-01-31 17:59:10,193 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:10,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:10,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1340097037, now seen corresponding path program 80 times [2022-01-31 17:59:10,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:10,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1970447938] [2022-01-31 17:59:10,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:10,194 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:10,194 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:10,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:10,201 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:10,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:12,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:12,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:12,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:59:12,366 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:12,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1970447938] [2022-01-31 17:59:12,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1970447938] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:12,366 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:12,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-01-31 17:59:12,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848691350] [2022-01-31 17:59:12,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:12,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-01-31 17:59:12,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:12,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-01-31 17:59:12,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 17:59:12,368 INFO L87 Difference]: Start difference. First operand 340 states and 342 transitions. Second operand has 84 states, 84 states have (on average 2.0595238095238093) internal successors, (173), 83 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:15,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:15,496 INFO L93 Difference]: Finished difference Result 519 states and 524 transitions. [2022-01-31 17:59:15,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-31 17:59:15,497 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.0595238095238093) internal successors, (173), 83 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 335 [2022-01-31 17:59:15,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:15,498 INFO L225 Difference]: With dead ends: 519 [2022-01-31 17:59:15,498 INFO L226 Difference]: Without dead ends: 346 [2022-01-31 17:59:15,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3320 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=10209, Invalid=16851, Unknown=0, NotChecked=0, Total=27060 [2022-01-31 17:59:15,499 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 522 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 430 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 523 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 430 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:15,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [523 Valid, 61 Invalid, 864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [430 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:59:15,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2022-01-31 17:59:15,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 344. [2022-01-31 17:59:15,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 338 states have (on average 1.0088757396449703) internal successors, (341), 338 states have internal predecessors, (341), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:59:15,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 346 transitions. [2022-01-31 17:59:15,595 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 346 transitions. Word has length 335 [2022-01-31 17:59:15,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:15,596 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 346 transitions. [2022-01-31 17:59:15,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.0595238095238093) internal successors, (173), 83 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:15,596 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 346 transitions. [2022-01-31 17:59:15,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2022-01-31 17:59:15,597 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:15,597 INFO L514 BasicCegarLoop]: trace histogram [81, 81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:15,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-01-31 17:59:15,597 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:15,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:15,597 INFO L85 PathProgramCache]: Analyzing trace with hash -2032497041, now seen corresponding path program 81 times [2022-01-31 17:59:15,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:15,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [475847940] [2022-01-31 17:59:15,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:15,599 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:15,599 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:15,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:15,606 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:15,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:17,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:17,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:17,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:59:17,838 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:17,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [475847940] [2022-01-31 17:59:17,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [475847940] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:17,839 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:17,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-01-31 17:59:17,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626834196] [2022-01-31 17:59:17,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:17,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-01-31 17:59:17,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:17,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-01-31 17:59:17,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3488, Invalid=3652, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 17:59:17,840 INFO L87 Difference]: Start difference. First operand 344 states and 346 transitions. Second operand has 85 states, 85 states have (on average 2.0588235294117645) internal successors, (175), 84 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:21,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:21,043 INFO L93 Difference]: Finished difference Result 525 states and 530 transitions. [2022-01-31 17:59:21,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-01-31 17:59:21,043 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.0588235294117645) internal successors, (175), 84 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 339 [2022-01-31 17:59:21,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:21,044 INFO L225 Difference]: With dead ends: 525 [2022-01-31 17:59:21,044 INFO L226 Difference]: Without dead ends: 350 [2022-01-31 17:59:21,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3402 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=10458, Invalid=17264, Unknown=0, NotChecked=0, Total=27722 [2022-01-31 17:59:21,045 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 593 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 502 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 594 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 502 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:21,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [594 Valid, 46 Invalid, 901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [502 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:59:21,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-01-31 17:59:21,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 348. [2022-01-31 17:59:21,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 342 states have (on average 1.0087719298245614) internal successors, (345), 342 states have internal predecessors, (345), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:59:21,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 350 transitions. [2022-01-31 17:59:21,142 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 350 transitions. Word has length 339 [2022-01-31 17:59:21,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:21,142 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 350 transitions. [2022-01-31 17:59:21,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.0588235294117645) internal successors, (175), 84 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:21,142 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 350 transitions. [2022-01-31 17:59:21,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2022-01-31 17:59:21,144 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:21,144 INFO L514 BasicCegarLoop]: trace histogram [82, 82, 82, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:21,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-01-31 17:59:21,144 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:21,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:21,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1647726357, now seen corresponding path program 82 times [2022-01-31 17:59:21,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:21,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [791638282] [2022-01-31 17:59:21,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:21,146 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:21,146 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:21,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:21,153 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:21,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:23,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:23,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:23,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:59:23,418 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:23,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [791638282] [2022-01-31 17:59:23,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [791638282] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:23,418 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:23,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-01-31 17:59:23,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174975898] [2022-01-31 17:59:23,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:23,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-01-31 17:59:23,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:23,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-01-31 17:59:23,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2022-01-31 17:59:23,420 INFO L87 Difference]: Start difference. First operand 348 states and 350 transitions. Second operand has 86 states, 86 states have (on average 2.058139534883721) internal successors, (177), 85 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:26,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:26,691 INFO L93 Difference]: Finished difference Result 531 states and 536 transitions. [2022-01-31 17:59:26,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-31 17:59:26,691 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.058139534883721) internal successors, (177), 85 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 343 [2022-01-31 17:59:26,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:26,692 INFO L225 Difference]: With dead ends: 531 [2022-01-31 17:59:26,692 INFO L226 Difference]: Without dead ends: 354 [2022-01-31 17:59:26,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3485 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=10710, Invalid=17682, Unknown=0, NotChecked=0, Total=28392 [2022-01-31 17:59:26,693 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 577 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 484 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 578 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 484 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:26,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [578 Valid, 56 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [484 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:59:26,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2022-01-31 17:59:26,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 352. [2022-01-31 17:59:26,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 346 states have (on average 1.0086705202312138) internal successors, (349), 346 states have internal predecessors, (349), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:59:26,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 354 transitions. [2022-01-31 17:59:26,780 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 354 transitions. Word has length 343 [2022-01-31 17:59:26,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:26,780 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 354 transitions. [2022-01-31 17:59:26,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.058139534883721) internal successors, (177), 85 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:26,780 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 354 transitions. [2022-01-31 17:59:26,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2022-01-31 17:59:26,781 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:26,781 INFO L514 BasicCegarLoop]: trace histogram [83, 83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:26,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-01-31 17:59:26,781 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:26,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:26,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1879562905, now seen corresponding path program 83 times [2022-01-31 17:59:26,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:26,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1324197585] [2022-01-31 17:59:26,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:26,783 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:26,783 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:26,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:26,793 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:26,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:29,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:29,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:29,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:59:29,160 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:29,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1324197585] [2022-01-31 17:59:29,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1324197585] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:29,160 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:29,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-01-31 17:59:29,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975352081] [2022-01-31 17:59:29,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:29,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-01-31 17:59:29,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:29,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-01-31 17:59:29,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3657, Invalid=3825, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 17:59:29,162 INFO L87 Difference]: Start difference. First operand 352 states and 354 transitions. Second operand has 87 states, 87 states have (on average 2.057471264367816) internal successors, (179), 86 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:32,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:32,503 INFO L93 Difference]: Finished difference Result 537 states and 542 transitions. [2022-01-31 17:59:32,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-01-31 17:59:32,504 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.057471264367816) internal successors, (179), 86 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 347 [2022-01-31 17:59:32,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:32,505 INFO L225 Difference]: With dead ends: 537 [2022-01-31 17:59:32,505 INFO L226 Difference]: Without dead ends: 358 [2022-01-31 17:59:32,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3569 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=10965, Invalid=18105, Unknown=0, NotChecked=0, Total=29070 [2022-01-31 17:59:32,506 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 602 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 509 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 603 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 509 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:32,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [603 Valid, 41 Invalid, 903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [509 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:59:32,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2022-01-31 17:59:32,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 356. [2022-01-31 17:59:32,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 350 states have (on average 1.0085714285714287) internal successors, (353), 350 states have internal predecessors, (353), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:59:32,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 358 transitions. [2022-01-31 17:59:32,606 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 358 transitions. Word has length 347 [2022-01-31 17:59:32,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:32,606 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 358 transitions. [2022-01-31 17:59:32,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 2.057471264367816) internal successors, (179), 86 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:32,607 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 358 transitions. [2022-01-31 17:59:32,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2022-01-31 17:59:32,608 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:32,608 INFO L514 BasicCegarLoop]: trace histogram [84, 84, 84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:32,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-01-31 17:59:32,608 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:32,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:32,608 INFO L85 PathProgramCache]: Analyzing trace with hash 703654883, now seen corresponding path program 84 times [2022-01-31 17:59:32,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:32,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1258121938] [2022-01-31 17:59:32,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:32,610 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:32,610 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:32,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:32,618 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:32,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:35,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:35,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:35,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:59:35,005 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:35,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1258121938] [2022-01-31 17:59:35,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1258121938] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:35,005 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:35,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-01-31 17:59:35,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240426571] [2022-01-31 17:59:35,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:35,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-01-31 17:59:35,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:35,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-01-31 17:59:35,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2022-01-31 17:59:35,008 INFO L87 Difference]: Start difference. First operand 356 states and 358 transitions. Second operand has 88 states, 88 states have (on average 2.0568181818181817) internal successors, (181), 87 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:38,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:38,475 INFO L93 Difference]: Finished difference Result 543 states and 548 transitions. [2022-01-31 17:59:38,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-01-31 17:59:38,476 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.0568181818181817) internal successors, (181), 87 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 351 [2022-01-31 17:59:38,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:38,477 INFO L225 Difference]: With dead ends: 543 [2022-01-31 17:59:38,477 INFO L226 Difference]: Without dead ends: 362 [2022-01-31 17:59:38,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3654 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=11223, Invalid=18533, Unknown=0, NotChecked=0, Total=29756 [2022-01-31 17:59:38,478 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 645 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 551 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 646 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 551 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:38,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [646 Valid, 41 Invalid, 949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [551 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:59:38,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-01-31 17:59:38,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 360. [2022-01-31 17:59:38,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 354 states have (on average 1.0084745762711864) internal successors, (357), 354 states have internal predecessors, (357), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:59:38,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 362 transitions. [2022-01-31 17:59:38,574 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 362 transitions. Word has length 351 [2022-01-31 17:59:38,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:38,574 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 362 transitions. [2022-01-31 17:59:38,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 2.0568181818181817) internal successors, (181), 87 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:38,574 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 362 transitions. [2022-01-31 17:59:38,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2022-01-31 17:59:38,576 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:38,576 INFO L514 BasicCegarLoop]: trace histogram [85, 85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:38,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-01-31 17:59:38,576 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:38,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:38,576 INFO L85 PathProgramCache]: Analyzing trace with hash -373357473, now seen corresponding path program 85 times [2022-01-31 17:59:38,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:38,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [986715295] [2022-01-31 17:59:38,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:38,578 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:38,578 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:38,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:38,585 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:38,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:41,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:41,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:41,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:59:41,015 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:41,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [986715295] [2022-01-31 17:59:41,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [986715295] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:41,015 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:41,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-01-31 17:59:41,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318322097] [2022-01-31 17:59:41,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:41,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-01-31 17:59:41,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:41,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-01-31 17:59:41,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3830, Invalid=4002, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 17:59:41,017 INFO L87 Difference]: Start difference. First operand 360 states and 362 transitions. Second operand has 89 states, 89 states have (on average 2.056179775280899) internal successors, (183), 88 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:44,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:44,517 INFO L93 Difference]: Finished difference Result 549 states and 554 transitions. [2022-01-31 17:59:44,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-31 17:59:44,517 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.056179775280899) internal successors, (183), 88 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 355 [2022-01-31 17:59:44,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:44,518 INFO L225 Difference]: With dead ends: 549 [2022-01-31 17:59:44,518 INFO L226 Difference]: Without dead ends: 366 [2022-01-31 17:59:44,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3740 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=11484, Invalid=18966, Unknown=0, NotChecked=0, Total=30450 [2022-01-31 17:59:44,519 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 601 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 505 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 602 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 505 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:44,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [602 Valid, 61 Invalid, 959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [505 Valid, 454 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:59:44,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2022-01-31 17:59:44,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 364. [2022-01-31 17:59:44,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 358 states have (on average 1.0083798882681565) internal successors, (361), 358 states have internal predecessors, (361), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:59:44,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 366 transitions. [2022-01-31 17:59:44,625 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 366 transitions. Word has length 355 [2022-01-31 17:59:44,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:44,625 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 366 transitions. [2022-01-31 17:59:44,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.056179775280899) internal successors, (183), 88 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:44,625 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 366 transitions. [2022-01-31 17:59:44,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-01-31 17:59:44,626 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:44,627 INFO L514 BasicCegarLoop]: trace histogram [86, 86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:44,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-01-31 17:59:44,627 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:44,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:44,627 INFO L85 PathProgramCache]: Analyzing trace with hash 2129489627, now seen corresponding path program 86 times [2022-01-31 17:59:44,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:44,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [329033334] [2022-01-31 17:59:44,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:44,628 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:44,628 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:44,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:44,637 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:44,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:47,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:47,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:47,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:59:47,148 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:47,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [329033334] [2022-01-31 17:59:47,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [329033334] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:47,149 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:47,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-01-31 17:59:47,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826567217] [2022-01-31 17:59:47,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:47,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-01-31 17:59:47,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:47,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-01-31 17:59:47,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3918, Invalid=4092, Unknown=0, NotChecked=0, Total=8010 [2022-01-31 17:59:47,151 INFO L87 Difference]: Start difference. First operand 364 states and 366 transitions. Second operand has 90 states, 90 states have (on average 2.0555555555555554) internal successors, (185), 89 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:50,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:50,762 INFO L93 Difference]: Finished difference Result 555 states and 560 transitions. [2022-01-31 17:59:50,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-01-31 17:59:50,762 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.0555555555555554) internal successors, (185), 89 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 359 [2022-01-31 17:59:50,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:50,763 INFO L225 Difference]: With dead ends: 555 [2022-01-31 17:59:50,763 INFO L226 Difference]: Without dead ends: 370 [2022-01-31 17:59:50,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3827 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=11748, Invalid=19404, Unknown=0, NotChecked=0, Total=31152 [2022-01-31 17:59:50,764 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 614 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 516 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 615 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 516 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:50,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [615 Valid, 46 Invalid, 935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [516 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:59:50,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2022-01-31 17:59:50,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 368. [2022-01-31 17:59:50,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 362 states have (on average 1.0082872928176796) internal successors, (365), 362 states have internal predecessors, (365), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:59:50,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 370 transitions. [2022-01-31 17:59:50,871 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 370 transitions. Word has length 359 [2022-01-31 17:59:50,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:50,871 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 370 transitions. [2022-01-31 17:59:50,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.0555555555555554) internal successors, (185), 89 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:50,871 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 370 transitions. [2022-01-31 17:59:50,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2022-01-31 17:59:50,873 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:50,873 INFO L514 BasicCegarLoop]: trace histogram [87, 87, 87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:50,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-01-31 17:59:50,873 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:50,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:50,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1250372439, now seen corresponding path program 87 times [2022-01-31 17:59:50,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:50,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [878238771] [2022-01-31 17:59:50,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:50,875 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:50,875 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:50,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:50,882 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:50,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:53,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:53,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:53,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:59:53,408 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:53,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [878238771] [2022-01-31 17:59:53,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [878238771] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:53,408 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:53,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-01-31 17:59:53,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705323115] [2022-01-31 17:59:53,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:53,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-01-31 17:59:53,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:53,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-01-31 17:59:53,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4007, Invalid=4183, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 17:59:53,411 INFO L87 Difference]: Start difference. First operand 368 states and 370 transitions. Second operand has 91 states, 91 states have (on average 2.0549450549450547) internal successors, (187), 90 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:57,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:57,072 INFO L93 Difference]: Finished difference Result 561 states and 566 transitions. [2022-01-31 17:59:57,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-01-31 17:59:57,072 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.0549450549450547) internal successors, (187), 90 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 363 [2022-01-31 17:59:57,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:57,074 INFO L225 Difference]: With dead ends: 561 [2022-01-31 17:59:57,074 INFO L226 Difference]: Without dead ends: 374 [2022-01-31 17:59:57,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3915 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=12015, Invalid=19847, Unknown=0, NotChecked=0, Total=31862 [2022-01-31 17:59:57,076 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 620 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 521 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 621 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 521 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:57,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [621 Valid, 46 Invalid, 944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [521 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:59:57,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-01-31 17:59:57,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 372. [2022-01-31 17:59:57,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 366 states have (on average 1.0081967213114753) internal successors, (369), 366 states have internal predecessors, (369), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:59:57,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 374 transitions. [2022-01-31 17:59:57,194 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 374 transitions. Word has length 363 [2022-01-31 17:59:57,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:57,194 INFO L470 AbstractCegarLoop]: Abstraction has 372 states and 374 transitions. [2022-01-31 17:59:57,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.0549450549450547) internal successors, (187), 90 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:57,195 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 374 transitions. [2022-01-31 17:59:57,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2022-01-31 17:59:57,196 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:57,196 INFO L514 BasicCegarLoop]: trace histogram [88, 88, 88, 88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:57,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-01-31 17:59:57,196 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:57,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:57,196 INFO L85 PathProgramCache]: Analyzing trace with hash -552125997, now seen corresponding path program 88 times [2022-01-31 17:59:57,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:57,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1180243761] [2022-01-31 17:59:57,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:57,198 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:57,198 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:57,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:57,205 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:57,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:59,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:59,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:59,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:59:59,790 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:59,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1180243761] [2022-01-31 17:59:59,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1180243761] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:59,790 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:59,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-01-31 17:59:59,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028862615] [2022-01-31 17:59:59,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:59,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-01-31 17:59:59,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:59,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-01-31 17:59:59,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2022-01-31 17:59:59,792 INFO L87 Difference]: Start difference. First operand 372 states and 374 transitions. Second operand has 92 states, 92 states have (on average 2.0543478260869565) internal successors, (189), 91 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:00:03,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:00:03,580 INFO L93 Difference]: Finished difference Result 567 states and 572 transitions. [2022-01-31 18:00:03,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-01-31 18:00:03,580 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.0543478260869565) internal successors, (189), 91 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 367 [2022-01-31 18:00:03,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:00:03,581 INFO L225 Difference]: With dead ends: 567 [2022-01-31 18:00:03,581 INFO L226 Difference]: Without dead ends: 378 [2022-01-31 18:00:03,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4004 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=12285, Invalid=20295, Unknown=0, NotChecked=0, Total=32580 [2022-01-31 18:00:03,583 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 756 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 661 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 757 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 661 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:00:03,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [757 Valid, 46 Invalid, 1088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [661 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:00:03,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2022-01-31 18:00:03,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 376. [2022-01-31 18:00:03,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 370 states have (on average 1.008108108108108) internal successors, (373), 370 states have internal predecessors, (373), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:00:03,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 378 transitions. [2022-01-31 18:00:03,695 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 378 transitions. Word has length 367 [2022-01-31 18:00:03,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:00:03,695 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 378 transitions. [2022-01-31 18:00:03,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.0543478260869565) internal successors, (189), 91 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:00:03,695 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 378 transitions. [2022-01-31 18:00:03,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2022-01-31 18:00:03,697 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:00:03,697 INFO L514 BasicCegarLoop]: trace histogram [89, 89, 89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:00:03,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-01-31 18:00:03,697 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:00:03,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:00:03,697 INFO L85 PathProgramCache]: Analyzing trace with hash -2136434097, now seen corresponding path program 89 times [2022-01-31 18:00:03,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:00:03,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [950561291] [2022-01-31 18:00:03,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:00:03,698 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:00:03,698 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:00:03,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:00:03,706 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:00:03,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:06,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:00:06,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:06,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:00:06,362 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:00:06,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [950561291] [2022-01-31 18:00:06,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [950561291] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:00:06,363 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:00:06,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-01-31 18:00:06,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15691512] [2022-01-31 18:00:06,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:00:06,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-01-31 18:00:06,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:00:06,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-01-31 18:00:06,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4188, Invalid=4368, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 18:00:06,365 INFO L87 Difference]: Start difference. First operand 376 states and 378 transitions. Second operand has 93 states, 93 states have (on average 2.053763440860215) internal successors, (191), 92 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:00:10,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:00:10,263 INFO L93 Difference]: Finished difference Result 573 states and 578 transitions. [2022-01-31 18:00:10,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-01-31 18:00:10,263 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 2.053763440860215) internal successors, (191), 92 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 371 [2022-01-31 18:00:10,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:00:10,264 INFO L225 Difference]: With dead ends: 573 [2022-01-31 18:00:10,264 INFO L226 Difference]: Without dead ends: 382 [2022-01-31 18:00:10,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4094 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=12558, Invalid=20748, Unknown=0, NotChecked=0, Total=33306 [2022-01-31 18:00:10,266 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 654 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 553 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 655 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 553 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:00:10,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [655 Valid, 51 Invalid, 997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [553 Valid, 444 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:00:10,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2022-01-31 18:00:10,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 380. [2022-01-31 18:00:10,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 374 states have (on average 1.0080213903743316) internal successors, (377), 374 states have internal predecessors, (377), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:00:10,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 382 transitions. [2022-01-31 18:00:10,369 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 382 transitions. Word has length 371 [2022-01-31 18:00:10,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:00:10,369 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 382 transitions. [2022-01-31 18:00:10,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 2.053763440860215) internal successors, (191), 92 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:00:10,369 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 382 transitions. [2022-01-31 18:00:10,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2022-01-31 18:00:10,371 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:00:10,371 INFO L514 BasicCegarLoop]: trace histogram [90, 90, 90, 90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:00:10,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2022-01-31 18:00:10,371 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:00:10,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:00:10,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1530508085, now seen corresponding path program 90 times [2022-01-31 18:00:10,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:00:10,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [201126537] [2022-01-31 18:00:10,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:00:10,373 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:00:10,373 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:00:10,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:00:10,384 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:00:10,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:13,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:00:13,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:13,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:00:13,141 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:00:13,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [201126537] [2022-01-31 18:00:13,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [201126537] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:00:13,142 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:00:13,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-01-31 18:00:13,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163415506] [2022-01-31 18:00:13,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:00:13,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-01-31 18:00:13,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:00:13,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-01-31 18:00:13,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4280, Invalid=4462, Unknown=0, NotChecked=0, Total=8742 [2022-01-31 18:00:13,143 INFO L87 Difference]: Start difference. First operand 380 states and 382 transitions. Second operand has 94 states, 94 states have (on average 2.0531914893617023) internal successors, (193), 93 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:00:17,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:00:17,110 INFO L93 Difference]: Finished difference Result 579 states and 584 transitions. [2022-01-31 18:00:17,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-01-31 18:00:17,111 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.0531914893617023) internal successors, (193), 93 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 375 [2022-01-31 18:00:17,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:00:17,112 INFO L225 Difference]: With dead ends: 579 [2022-01-31 18:00:17,112 INFO L226 Difference]: Without dead ends: 386 [2022-01-31 18:00:17,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4185 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=12834, Invalid=21206, Unknown=0, NotChecked=0, Total=34040 [2022-01-31 18:00:17,113 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 636 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 536 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 637 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 536 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:00:17,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [637 Valid, 46 Invalid, 971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [536 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:00:17,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2022-01-31 18:00:17,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 384. [2022-01-31 18:00:17,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 378 states have (on average 1.007936507936508) internal successors, (381), 378 states have internal predecessors, (381), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:00:17,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 386 transitions. [2022-01-31 18:00:17,232 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 386 transitions. Word has length 375 [2022-01-31 18:00:17,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:00:17,232 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 386 transitions. [2022-01-31 18:00:17,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 2.0531914893617023) internal successors, (193), 93 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:00:17,233 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 386 transitions. [2022-01-31 18:00:17,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2022-01-31 18:00:17,234 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:00:17,234 INFO L514 BasicCegarLoop]: trace histogram [91, 91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:00:17,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2022-01-31 18:00:17,234 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:00:17,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:00:17,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1920684359, now seen corresponding path program 91 times [2022-01-31 18:00:17,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:00:17,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2045384047] [2022-01-31 18:00:17,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:00:17,236 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:00:17,236 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:00:17,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:00:17,247 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:00:17,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:20,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:00:20,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:20,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:00:20,036 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:00:20,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2045384047] [2022-01-31 18:00:20,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2045384047] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:00:20,036 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:00:20,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-01-31 18:00:20,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539740420] [2022-01-31 18:00:20,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:00:20,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-01-31 18:00:20,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:00:20,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-01-31 18:00:20,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4373, Invalid=4557, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 18:00:20,038 INFO L87 Difference]: Start difference. First operand 384 states and 386 transitions. Second operand has 95 states, 95 states have (on average 2.0526315789473686) internal successors, (195), 94 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:00:24,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:00:24,136 INFO L93 Difference]: Finished difference Result 585 states and 590 transitions. [2022-01-31 18:00:24,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-01-31 18:00:24,137 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.0526315789473686) internal successors, (195), 94 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 379 [2022-01-31 18:00:24,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:00:24,138 INFO L225 Difference]: With dead ends: 585 [2022-01-31 18:00:24,138 INFO L226 Difference]: Without dead ends: 390 [2022-01-31 18:00:24,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4277 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=13113, Invalid=21669, Unknown=0, NotChecked=0, Total=34782 [2022-01-31 18:00:24,139 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 681 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 581 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 682 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 581 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:00:24,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [682 Valid, 46 Invalid, 1020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [581 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:00:24,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-01-31 18:00:24,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 388. [2022-01-31 18:00:24,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 382 states have (on average 1.0078534031413613) internal successors, (385), 382 states have internal predecessors, (385), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:00:24,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 390 transitions. [2022-01-31 18:00:24,251 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 390 transitions. Word has length 379 [2022-01-31 18:00:24,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:00:24,251 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 390 transitions. [2022-01-31 18:00:24,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.0526315789473686) internal successors, (195), 94 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:00:24,251 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 390 transitions. [2022-01-31 18:00:24,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2022-01-31 18:00:24,252 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:00:24,253 INFO L514 BasicCegarLoop]: trace histogram [92, 92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:00:24,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2022-01-31 18:00:24,253 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:00:24,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:00:24,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1112713155, now seen corresponding path program 92 times [2022-01-31 18:00:24,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:00:24,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [703589193] [2022-01-31 18:00:24,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:00:24,255 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:00:24,255 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:00:24,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:00:24,266 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:00:24,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:27,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:00:27,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:27,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:00:27,145 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:00:27,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [703589193] [2022-01-31 18:00:27,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [703589193] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:00:27,145 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:00:27,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-01-31 18:00:27,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916590670] [2022-01-31 18:00:27,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:00:27,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-01-31 18:00:27,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:00:27,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-01-31 18:00:27,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2022-01-31 18:00:27,147 INFO L87 Difference]: Start difference. First operand 388 states and 390 transitions. Second operand has 96 states, 96 states have (on average 2.0520833333333335) internal successors, (197), 95 states have internal predecessors, (197), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:00:31,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:00:31,274 INFO L93 Difference]: Finished difference Result 591 states and 596 transitions. [2022-01-31 18:00:31,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-01-31 18:00:31,274 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.0520833333333335) internal successors, (197), 95 states have internal predecessors, (197), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 383 [2022-01-31 18:00:31,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:00:31,275 INFO L225 Difference]: With dead ends: 591 [2022-01-31 18:00:31,275 INFO L226 Difference]: Without dead ends: 394 [2022-01-31 18:00:31,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4370 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=13395, Invalid=22137, Unknown=0, NotChecked=0, Total=35532 [2022-01-31 18:00:31,277 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 620 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 516 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 621 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 516 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:00:31,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [621 Valid, 61 Invalid, 998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [516 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:00:31,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2022-01-31 18:00:31,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 392. [2022-01-31 18:00:31,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 386 states have (on average 1.0077720207253886) internal successors, (389), 386 states have internal predecessors, (389), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:00:31,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 394 transitions. [2022-01-31 18:00:31,386 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 394 transitions. Word has length 383 [2022-01-31 18:00:31,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:00:31,386 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 394 transitions. [2022-01-31 18:00:31,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.0520833333333335) internal successors, (197), 95 states have internal predecessors, (197), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:00:31,386 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 394 transitions. [2022-01-31 18:00:31,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2022-01-31 18:00:31,388 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:00:31,388 INFO L514 BasicCegarLoop]: trace histogram [93, 93, 93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:00:31,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2022-01-31 18:00:31,388 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:00:31,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:00:31,388 INFO L85 PathProgramCache]: Analyzing trace with hash 509038655, now seen corresponding path program 93 times [2022-01-31 18:00:31,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:00:31,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [835529246] [2022-01-31 18:00:31,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:00:31,390 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:00:31,390 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:00:31,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:00:31,398 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:00:31,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:34,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:00:34,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:34,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:00:34,299 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:00:34,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [835529246] [2022-01-31 18:00:34,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [835529246] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:00:34,299 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:00:34,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-01-31 18:00:34,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758145710] [2022-01-31 18:00:34,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:00:34,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-01-31 18:00:34,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:00:34,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-01-31 18:00:34,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4562, Invalid=4750, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 18:00:34,302 INFO L87 Difference]: Start difference. First operand 392 states and 394 transitions. Second operand has 97 states, 97 states have (on average 2.051546391752577) internal successors, (199), 96 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:00:38,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:00:38,422 INFO L93 Difference]: Finished difference Result 597 states and 602 transitions. [2022-01-31 18:00:38,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-31 18:00:38,422 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.051546391752577) internal successors, (199), 96 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 387 [2022-01-31 18:00:38,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:00:38,423 INFO L225 Difference]: With dead ends: 597 [2022-01-31 18:00:38,423 INFO L226 Difference]: Without dead ends: 398 [2022-01-31 18:00:38,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4464 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=13680, Invalid=22610, Unknown=0, NotChecked=0, Total=36290 [2022-01-31 18:00:38,425 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 711 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 608 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 712 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 1016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 608 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:00:38,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [712 Valid, 31 Invalid, 1016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [608 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:00:38,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2022-01-31 18:00:38,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 396. [2022-01-31 18:00:38,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 390 states have (on average 1.0076923076923077) internal successors, (393), 390 states have internal predecessors, (393), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:00:38,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 398 transitions. [2022-01-31 18:00:38,550 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 398 transitions. Word has length 387 [2022-01-31 18:00:38,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:00:38,550 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 398 transitions. [2022-01-31 18:00:38,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.051546391752577) internal successors, (199), 96 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:00:38,551 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 398 transitions. [2022-01-31 18:00:38,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2022-01-31 18:00:38,552 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:00:38,552 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:00:38,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2022-01-31 18:00:38,552 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:00:38,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:00:38,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1108626107, now seen corresponding path program 94 times [2022-01-31 18:00:38,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:00:38,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1036760457] [2022-01-31 18:00:38,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:00:38,554 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:00:38,554 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:00:38,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:00:38,564 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:00:38,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:41,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:00:41,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:41,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:00:41,520 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:00:41,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1036760457] [2022-01-31 18:00:41,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1036760457] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:00:41,521 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:00:41,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-01-31 18:00:41,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622196096] [2022-01-31 18:00:41,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:00:41,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-01-31 18:00:41,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:00:41,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-01-31 18:00:41,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 18:00:41,523 INFO L87 Difference]: Start difference. First operand 396 states and 398 transitions. Second operand has 98 states, 98 states have (on average 2.0510204081632653) internal successors, (201), 97 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:00:45,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:00:45,841 INFO L93 Difference]: Finished difference Result 603 states and 608 transitions. [2022-01-31 18:00:45,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-01-31 18:00:45,842 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.0510204081632653) internal successors, (201), 97 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 391 [2022-01-31 18:00:45,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:00:45,843 INFO L225 Difference]: With dead ends: 603 [2022-01-31 18:00:45,843 INFO L226 Difference]: Without dead ends: 402 [2022-01-31 18:00:45,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4559 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=13968, Invalid=23088, Unknown=0, NotChecked=0, Total=37056 [2022-01-31 18:00:45,844 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 662 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 561 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 663 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 561 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:00:45,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [663 Valid, 41 Invalid, 999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [561 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:00:45,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-01-31 18:00:45,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 400. [2022-01-31 18:00:45,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 394 states have (on average 1.0076142131979695) internal successors, (397), 394 states have internal predecessors, (397), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:00:45,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 402 transitions. [2022-01-31 18:00:45,974 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 402 transitions. Word has length 391 [2022-01-31 18:00:45,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:00:45,974 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 402 transitions. [2022-01-31 18:00:45,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.0510204081632653) internal successors, (201), 97 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:00:45,974 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 402 transitions. [2022-01-31 18:00:45,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2022-01-31 18:00:45,975 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:00:45,976 INFO L514 BasicCegarLoop]: trace histogram [95, 95, 95, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:00:45,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2022-01-31 18:00:45,976 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:00:45,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:00:45,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1701537993, now seen corresponding path program 95 times [2022-01-31 18:00:45,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:00:45,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [963773568] [2022-01-31 18:00:45,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:00:45,978 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:00:45,978 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:00:45,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:00:45,988 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:00:46,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:49,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:00:49,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:49,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:00:49,064 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:00:49,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [963773568] [2022-01-31 18:00:49,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [963773568] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:00:49,064 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:00:49,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-01-31 18:00:49,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296801963] [2022-01-31 18:00:49,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:00:49,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-01-31 18:00:49,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:00:49,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-01-31 18:00:49,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4755, Invalid=4947, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 18:00:49,067 INFO L87 Difference]: Start difference. First operand 400 states and 402 transitions. Second operand has 99 states, 99 states have (on average 2.0505050505050506) internal successors, (203), 98 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:00:53,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:00:53,625 INFO L93 Difference]: Finished difference Result 609 states and 614 transitions. [2022-01-31 18:00:53,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-01-31 18:00:53,625 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.0505050505050506) internal successors, (203), 98 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 395 [2022-01-31 18:00:53,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:00:53,627 INFO L225 Difference]: With dead ends: 609 [2022-01-31 18:00:53,627 INFO L226 Difference]: Without dead ends: 406 [2022-01-31 18:00:53,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4655 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=14259, Invalid=23571, Unknown=0, NotChecked=0, Total=37830 [2022-01-31 18:00:53,628 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 742 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 642 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 743 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 1136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 642 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:00:53,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [743 Valid, 61 Invalid, 1136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [642 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:00:53,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2022-01-31 18:00:53,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 404. [2022-01-31 18:00:53,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 398 states have (on average 1.0075376884422111) internal successors, (401), 398 states have internal predecessors, (401), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:00:53,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 406 transitions. [2022-01-31 18:00:53,759 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 406 transitions. Word has length 395 [2022-01-31 18:00:53,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:00:53,760 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 406 transitions. [2022-01-31 18:00:53,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.0505050505050506) internal successors, (203), 98 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:00:53,760 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 406 transitions. [2022-01-31 18:00:53,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2022-01-31 18:00:53,761 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:00:53,762 INFO L514 BasicCegarLoop]: trace histogram [96, 96, 96, 96, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:00:53,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2022-01-31 18:00:53,762 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:00:53,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:00:53,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1180906931, now seen corresponding path program 96 times [2022-01-31 18:00:53,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:00:53,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [589087236] [2022-01-31 18:00:53,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:00:53,764 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:00:53,764 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:00:53,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:00:53,778 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:00:53,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:56,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:00:56,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:56,900 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 18:00:56,900 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:00:56,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [589087236] [2022-01-31 18:00:56,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [589087236] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:00:56,900 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:00:56,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-01-31 18:00:56,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242464905] [2022-01-31 18:00:56,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:00:56,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-01-31 18:00:56,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:00:56,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-01-31 18:00:56,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2022-01-31 18:00:56,906 INFO L87 Difference]: Start difference. First operand 404 states and 406 transitions. Second operand has 100 states, 100 states have (on average 2.05) internal successors, (205), 99 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:01:01,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:01:01,426 INFO L93 Difference]: Finished difference Result 615 states and 620 transitions. [2022-01-31 18:01:01,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-01-31 18:01:01,427 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.05) internal successors, (205), 99 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 399 [2022-01-31 18:01:01,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:01:01,428 INFO L225 Difference]: With dead ends: 615 [2022-01-31 18:01:01,428 INFO L226 Difference]: Without dead ends: 410 [2022-01-31 18:01:01,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4752 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=14553, Invalid=24059, Unknown=0, NotChecked=0, Total=38612 [2022-01-31 18:01:01,430 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 738 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 631 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 739 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 1103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 631 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:01:01,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [739 Valid, 51 Invalid, 1103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [631 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:01:01,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2022-01-31 18:01:01,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 408. [2022-01-31 18:01:01,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 402 states have (on average 1.007462686567164) internal successors, (405), 402 states have internal predecessors, (405), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:01:01,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 410 transitions. [2022-01-31 18:01:01,548 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 410 transitions. Word has length 399 [2022-01-31 18:01:01,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:01:01,548 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 410 transitions. [2022-01-31 18:01:01,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 2.05) internal successors, (205), 99 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:01:01,548 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 410 transitions. [2022-01-31 18:01:01,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 404 [2022-01-31 18:01:01,549 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:01:01,550 INFO L514 BasicCegarLoop]: trace histogram [97, 97, 97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:01:01,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2022-01-31 18:01:01,550 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:01:01,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:01:01,550 INFO L85 PathProgramCache]: Analyzing trace with hash 361440815, now seen corresponding path program 97 times [2022-01-31 18:01:01,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:01:01,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [680968029] [2022-01-31 18:01:01,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:01:01,551 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:01:01,552 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:01:01,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:01:01,562 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:01:01,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:04,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:01:04,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:04,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:01:04,725 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:01:04,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [680968029] [2022-01-31 18:01:04,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [680968029] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:01:04,726 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:01:04,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-01-31 18:01:04,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041847467] [2022-01-31 18:01:04,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:01:04,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-01-31 18:01:04,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:01:04,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-01-31 18:01:04,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4952, Invalid=5148, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 18:01:04,728 INFO L87 Difference]: Start difference. First operand 408 states and 410 transitions. Second operand has 101 states, 101 states have (on average 2.0495049504950495) internal successors, (207), 100 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:01:09,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:01:09,408 INFO L93 Difference]: Finished difference Result 621 states and 626 transitions. [2022-01-31 18:01:09,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-01-31 18:01:09,409 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.0495049504950495) internal successors, (207), 100 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 403 [2022-01-31 18:01:09,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:01:09,410 INFO L225 Difference]: With dead ends: 621 [2022-01-31 18:01:09,410 INFO L226 Difference]: Without dead ends: 414 [2022-01-31 18:01:09,411 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4850 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=14850, Invalid=24552, Unknown=0, NotChecked=0, Total=39402 [2022-01-31 18:01:09,412 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 769 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 660 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 770 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 660 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:01:09,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [770 Valid, 46 Invalid, 1123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [660 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:01:09,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2022-01-31 18:01:09,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 412. [2022-01-31 18:01:09,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 406 states have (on average 1.0073891625615763) internal successors, (409), 406 states have internal predecessors, (409), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:01:09,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 414 transitions. [2022-01-31 18:01:09,551 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 414 transitions. Word has length 403 [2022-01-31 18:01:09,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:01:09,551 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 414 transitions. [2022-01-31 18:01:09,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.0495049504950495) internal successors, (207), 100 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:01:09,551 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 414 transitions. [2022-01-31 18:01:09,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2022-01-31 18:01:09,553 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:01:09,553 INFO L514 BasicCegarLoop]: trace histogram [98, 98, 98, 98, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:01:09,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2022-01-31 18:01:09,553 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:01:09,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:01:09,554 INFO L85 PathProgramCache]: Analyzing trace with hash 160917675, now seen corresponding path program 98 times [2022-01-31 18:01:09,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:01:09,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1405243386] [2022-01-31 18:01:09,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:01:09,555 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:01:09,556 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:01:09,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:01:09,567 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:01:09,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:12,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:01:12,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:12,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:01:12,785 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:01:12,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1405243386] [2022-01-31 18:01:12,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1405243386] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:01:12,785 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:01:12,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2022-01-31 18:01:12,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371654573] [2022-01-31 18:01:12,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:01:12,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-01-31 18:01:12,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:01:12,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-01-31 18:01:12,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2022-01-31 18:01:12,787 INFO L87 Difference]: Start difference. First operand 412 states and 414 transitions. Second operand has 102 states, 102 states have (on average 2.049019607843137) internal successors, (209), 101 states have internal predecessors, (209), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:01:17,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:01:17,549 INFO L93 Difference]: Finished difference Result 627 states and 632 transitions. [2022-01-31 18:01:17,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-01-31 18:01:17,549 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.049019607843137) internal successors, (209), 101 states have internal predecessors, (209), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 407 [2022-01-31 18:01:17,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:01:17,551 INFO L225 Difference]: With dead ends: 627 [2022-01-31 18:01:17,551 INFO L226 Difference]: Without dead ends: 418 [2022-01-31 18:01:17,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4949 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=15150, Invalid=25050, Unknown=0, NotChecked=0, Total=40200 [2022-01-31 18:01:17,553 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 744 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 634 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 745 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 1088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 634 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:01:17,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [745 Valid, 41 Invalid, 1088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [634 Valid, 454 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:01:17,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2022-01-31 18:01:17,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 416. [2022-01-31 18:01:17,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 410 states have (on average 1.0073170731707317) internal successors, (413), 410 states have internal predecessors, (413), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:01:17,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 418 transitions. [2022-01-31 18:01:17,694 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 418 transitions. Word has length 407 [2022-01-31 18:01:17,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:01:17,694 INFO L470 AbstractCegarLoop]: Abstraction has 416 states and 418 transitions. [2022-01-31 18:01:17,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 2.049019607843137) internal successors, (209), 101 states have internal predecessors, (209), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:01:17,695 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 418 transitions. [2022-01-31 18:01:17,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2022-01-31 18:01:17,696 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:01:17,697 INFO L514 BasicCegarLoop]: trace histogram [99, 99, 99, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:01:17,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2022-01-31 18:01:17,697 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:01:17,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:01:17,697 INFO L85 PathProgramCache]: Analyzing trace with hash -711787225, now seen corresponding path program 99 times [2022-01-31 18:01:17,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:01:17,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [920449772] [2022-01-31 18:01:17,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:01:17,699 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:01:17,699 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:01:17,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:01:17,710 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:01:17,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:21,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:01:21,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:21,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:01:21,016 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:01:21,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [920449772] [2022-01-31 18:01:21,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [920449772] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:01:21,016 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:01:21,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2022-01-31 18:01:21,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308160787] [2022-01-31 18:01:21,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:01:21,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-01-31 18:01:21,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:01:21,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-01-31 18:01:21,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 18:01:21,020 INFO L87 Difference]: Start difference. First operand 416 states and 418 transitions. Second operand has 103 states, 103 states have (on average 2.0485436893203883) internal successors, (211), 102 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:01:25,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:01:25,785 INFO L93 Difference]: Finished difference Result 633 states and 638 transitions. [2022-01-31 18:01:25,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-01-31 18:01:25,786 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 2.0485436893203883) internal successors, (211), 102 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 411 [2022-01-31 18:01:25,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:01:25,787 INFO L225 Difference]: With dead ends: 633 [2022-01-31 18:01:25,787 INFO L226 Difference]: Without dead ends: 422 [2022-01-31 18:01:25,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5049 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=15453, Invalid=25553, Unknown=0, NotChecked=0, Total=41006 [2022-01-31 18:01:25,789 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 697 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 589 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 698 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 1047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 589 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:01:25,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [698 Valid, 41 Invalid, 1047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [589 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:01:25,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2022-01-31 18:01:25,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 420. [2022-01-31 18:01:25,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 414 states have (on average 1.0072463768115942) internal successors, (417), 414 states have internal predecessors, (417), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:01:25,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 422 transitions. [2022-01-31 18:01:25,939 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 422 transitions. Word has length 411 [2022-01-31 18:01:25,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:01:25,940 INFO L470 AbstractCegarLoop]: Abstraction has 420 states and 422 transitions. [2022-01-31 18:01:25,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 2.0485436893203883) internal successors, (211), 102 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:01:25,940 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 422 transitions. [2022-01-31 18:01:25,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 416 [2022-01-31 18:01:25,941 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:01:25,941 INFO L514 BasicCegarLoop]: trace histogram [100, 100, 100, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:01:25,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2022-01-31 18:01:25,942 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:01:25,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:01:25,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1577640867, now seen corresponding path program 100 times [2022-01-31 18:01:25,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:01:25,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [28349130] [2022-01-31 18:01:25,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:01:25,944 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:01:25,944 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:01:25,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:01:25,955 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:01:26,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:29,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:01:29,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:29,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:01:29,277 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:01:29,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [28349130] [2022-01-31 18:01:29,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [28349130] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:01:29,277 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:01:29,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2022-01-31 18:01:29,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763508108] [2022-01-31 18:01:29,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:01:29,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-01-31 18:01:29,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:01:29,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-01-31 18:01:29,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-01-31 18:01:29,280 INFO L87 Difference]: Start difference. First operand 420 states and 422 transitions. Second operand has 104 states, 104 states have (on average 2.048076923076923) internal successors, (213), 103 states have internal predecessors, (213), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:01:34,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:01:34,296 INFO L93 Difference]: Finished difference Result 639 states and 644 transitions. [2022-01-31 18:01:34,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-01-31 18:01:34,296 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.048076923076923) internal successors, (213), 103 states have internal predecessors, (213), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 415 [2022-01-31 18:01:34,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:01:34,297 INFO L225 Difference]: With dead ends: 639 [2022-01-31 18:01:34,297 INFO L226 Difference]: Without dead ends: 426 [2022-01-31 18:01:34,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5150 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=15759, Invalid=26061, Unknown=0, NotChecked=0, Total=41820 [2022-01-31 18:01:34,301 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 745 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 637 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 746 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 637 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:01:34,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [746 Valid, 46 Invalid, 1112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [637 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:01:34,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2022-01-31 18:01:34,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 424. [2022-01-31 18:01:34,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 418 states have (on average 1.007177033492823) internal successors, (421), 418 states have internal predecessors, (421), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:01:34,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 426 transitions. [2022-01-31 18:01:34,446 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 426 transitions. Word has length 415 [2022-01-31 18:01:34,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:01:34,447 INFO L470 AbstractCegarLoop]: Abstraction has 424 states and 426 transitions. [2022-01-31 18:01:34,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 2.048076923076923) internal successors, (213), 103 states have internal predecessors, (213), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:01:34,447 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 426 transitions. [2022-01-31 18:01:34,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2022-01-31 18:01:34,448 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:01:34,449 INFO L514 BasicCegarLoop]: trace histogram [101, 101, 101, 101, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:01:34,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2022-01-31 18:01:34,449 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:01:34,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:01:34,449 INFO L85 PathProgramCache]: Analyzing trace with hash 956570655, now seen corresponding path program 101 times [2022-01-31 18:01:34,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:01:34,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1193566502] [2022-01-31 18:01:34,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:01:34,450 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:01:34,451 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:01:34,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:01:34,462 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:01:34,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:37,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:01:37,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:37,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:01:37,872 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:01:37,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1193566502] [2022-01-31 18:01:37,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1193566502] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:01:37,872 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:01:37,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2022-01-31 18:01:37,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110998077] [2022-01-31 18:01:37,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:01:37,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-01-31 18:01:37,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:01:37,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-01-31 18:01:37,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5358, Invalid=5562, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 18:01:37,877 INFO L87 Difference]: Start difference. First operand 424 states and 426 transitions. Second operand has 105 states, 105 states have (on average 2.0476190476190474) internal successors, (215), 104 states have internal predecessors, (215), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:01:43,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:01:43,067 INFO L93 Difference]: Finished difference Result 645 states and 650 transitions. [2022-01-31 18:01:43,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-01-31 18:01:43,068 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.0476190476190474) internal successors, (215), 104 states have internal predecessors, (215), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 419 [2022-01-31 18:01:43,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:01:43,068 INFO L225 Difference]: With dead ends: 645 [2022-01-31 18:01:43,068 INFO L226 Difference]: Without dead ends: 430 [2022-01-31 18:01:43,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5252 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=16068, Invalid=26574, Unknown=0, NotChecked=0, Total=42642 [2022-01-31 18:01:43,070 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 740 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 628 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 741 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 1146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 628 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:01:43,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [741 Valid, 61 Invalid, 1146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [628 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:01:43,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2022-01-31 18:01:43,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 428. [2022-01-31 18:01:43,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 422 states have (on average 1.0071090047393365) internal successors, (425), 422 states have internal predecessors, (425), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:01:43,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 430 transitions. [2022-01-31 18:01:43,202 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 430 transitions. Word has length 419 [2022-01-31 18:01:43,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:01:43,202 INFO L470 AbstractCegarLoop]: Abstraction has 428 states and 430 transitions. [2022-01-31 18:01:43,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 2.0476190476190474) internal successors, (215), 104 states have internal predecessors, (215), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:01:43,203 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 430 transitions. [2022-01-31 18:01:43,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2022-01-31 18:01:43,204 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:01:43,204 INFO L514 BasicCegarLoop]: trace histogram [102, 102, 102, 102, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:01:43,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2022-01-31 18:01:43,205 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:01:43,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:01:43,205 INFO L85 PathProgramCache]: Analyzing trace with hash 772777627, now seen corresponding path program 102 times [2022-01-31 18:01:43,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:01:43,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [7787945] [2022-01-31 18:01:43,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:01:43,207 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:01:43,207 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:01:43,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:01:43,218 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:01:43,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:46,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:01:46,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:46,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:01:46,690 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:01:46,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [7787945] [2022-01-31 18:01:46,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [7787945] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:01:46,690 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:01:46,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2022-01-31 18:01:46,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295354045] [2022-01-31 18:01:46,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:01:46,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-01-31 18:01:46,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:01:46,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-01-31 18:01:46,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2022-01-31 18:01:46,693 INFO L87 Difference]: Start difference. First operand 428 states and 430 transitions. Second operand has 106 states, 106 states have (on average 2.047169811320755) internal successors, (217), 105 states have internal predecessors, (217), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:01:51,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:01:51,726 INFO L93 Difference]: Finished difference Result 651 states and 656 transitions. [2022-01-31 18:01:51,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-01-31 18:01:51,726 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.047169811320755) internal successors, (217), 105 states have internal predecessors, (217), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 423 [2022-01-31 18:01:51,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:01:51,727 INFO L225 Difference]: With dead ends: 651 [2022-01-31 18:01:51,727 INFO L226 Difference]: Without dead ends: 434 [2022-01-31 18:01:51,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5355 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=16380, Invalid=27092, Unknown=0, NotChecked=0, Total=43472 [2022-01-31 18:01:51,729 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 699 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 586 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 700 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 586 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:01:51,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [700 Valid, 46 Invalid, 1069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [586 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:01:51,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2022-01-31 18:01:51,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 432. [2022-01-31 18:01:51,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 426 states have (on average 1.0070422535211268) internal successors, (429), 426 states have internal predecessors, (429), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:01:51,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 434 transitions. [2022-01-31 18:01:51,871 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 434 transitions. Word has length 423 [2022-01-31 18:01:51,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:01:51,871 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 434 transitions. [2022-01-31 18:01:51,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 2.047169811320755) internal successors, (217), 105 states have internal predecessors, (217), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:01:51,871 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 434 transitions. [2022-01-31 18:01:51,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 428 [2022-01-31 18:01:51,873 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:01:51,873 INFO L514 BasicCegarLoop]: trace histogram [103, 103, 103, 103, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:01:51,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2022-01-31 18:01:51,873 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:01:51,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:01:51,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1237941481, now seen corresponding path program 103 times [2022-01-31 18:01:51,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:01:51,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1683370744] [2022-01-31 18:01:51,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:01:51,874 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:01:51,874 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:01:51,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:01:51,887 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:01:51,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:55,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:01:55,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:55,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:01:55,420 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:01:55,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1683370744] [2022-01-31 18:01:55,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1683370744] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:01:55,420 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:01:55,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [107] imperfect sequences [] total 107 [2022-01-31 18:01:55,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062386547] [2022-01-31 18:01:55,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:01:55,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-01-31 18:01:55,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:01:55,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-01-31 18:01:55,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5567, Invalid=5775, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 18:01:55,423 INFO L87 Difference]: Start difference. First operand 432 states and 434 transitions. Second operand has 107 states, 107 states have (on average 2.046728971962617) internal successors, (219), 106 states have internal predecessors, (219), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:02:00,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:02:00,636 INFO L93 Difference]: Finished difference Result 657 states and 662 transitions. [2022-01-31 18:02:00,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-01-31 18:02:00,636 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.046728971962617) internal successors, (219), 106 states have internal predecessors, (219), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 427 [2022-01-31 18:02:00,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:02:00,637 INFO L225 Difference]: With dead ends: 657 [2022-01-31 18:02:00,638 INFO L226 Difference]: Without dead ends: 438 [2022-01-31 18:02:00,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5459 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=16695, Invalid=27615, Unknown=0, NotChecked=0, Total=44310 [2022-01-31 18:02:00,640 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 793 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 680 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 794 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 1154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 680 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:02:00,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [794 Valid, 41 Invalid, 1154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [680 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:02:00,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2022-01-31 18:02:00,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 436. [2022-01-31 18:02:00,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 430 states have (on average 1.0069767441860464) internal successors, (433), 430 states have internal predecessors, (433), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:02:00,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 438 transitions. [2022-01-31 18:02:00,816 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 438 transitions. Word has length 427 [2022-01-31 18:02:00,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:02:00,817 INFO L470 AbstractCegarLoop]: Abstraction has 436 states and 438 transitions. [2022-01-31 18:02:00,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 2.046728971962617) internal successors, (219), 106 states have internal predecessors, (219), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:02:00,817 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 438 transitions. [2022-01-31 18:02:00,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 432 [2022-01-31 18:02:00,818 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:02:00,818 INFO L514 BasicCegarLoop]: trace histogram [104, 104, 104, 104, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:02:00,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2022-01-31 18:02:00,819 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:02:00,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:02:00,819 INFO L85 PathProgramCache]: Analyzing trace with hash 2080616851, now seen corresponding path program 104 times [2022-01-31 18:02:00,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:02:00,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [473495956] [2022-01-31 18:02:00,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:02:00,820 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:02:00,820 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:02:00,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:02:00,832 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:02:00,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:02:04,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:02:04,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:02:04,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:02:04,461 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:02:04,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [473495956] [2022-01-31 18:02:04,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [473495956] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:02:04,461 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:02:04,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2022-01-31 18:02:04,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561096947] [2022-01-31 18:02:04,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:02:04,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-01-31 18:02:04,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:02:04,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-01-31 18:02:04,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5673, Invalid=5883, Unknown=0, NotChecked=0, Total=11556 [2022-01-31 18:02:04,465 INFO L87 Difference]: Start difference. First operand 436 states and 438 transitions. Second operand has 108 states, 108 states have (on average 2.0462962962962963) internal successors, (221), 107 states have internal predecessors, (221), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:02:09,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:02:09,801 INFO L93 Difference]: Finished difference Result 663 states and 668 transitions. [2022-01-31 18:02:09,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-01-31 18:02:09,801 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 2.0462962962962963) internal successors, (221), 107 states have internal predecessors, (221), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 431 [2022-01-31 18:02:09,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:02:09,802 INFO L225 Difference]: With dead ends: 663 [2022-01-31 18:02:09,802 INFO L226 Difference]: Without dead ends: 442 [2022-01-31 18:02:09,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5564 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=17013, Invalid=28143, Unknown=0, NotChecked=0, Total=45156 [2022-01-31 18:02:09,804 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 741 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 628 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 742 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 1145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 628 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:02:09,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [742 Valid, 56 Invalid, 1145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [628 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:02:09,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2022-01-31 18:02:09,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 440. [2022-01-31 18:02:09,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 434 states have (on average 1.0069124423963134) internal successors, (437), 434 states have internal predecessors, (437), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:02:09,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 442 transitions. [2022-01-31 18:02:09,959 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 442 transitions. Word has length 431 [2022-01-31 18:02:09,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:02:09,959 INFO L470 AbstractCegarLoop]: Abstraction has 440 states and 442 transitions. [2022-01-31 18:02:09,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 2.0462962962962963) internal successors, (221), 107 states have internal predecessors, (221), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:02:09,959 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 442 transitions. [2022-01-31 18:02:09,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2022-01-31 18:02:09,961 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:02:09,961 INFO L514 BasicCegarLoop]: trace histogram [105, 105, 105, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:02:09,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2022-01-31 18:02:09,961 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:02:09,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:02:09,961 INFO L85 PathProgramCache]: Analyzing trace with hash -612224497, now seen corresponding path program 105 times [2022-01-31 18:02:09,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:02:09,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [659700613] [2022-01-31 18:02:09,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:02:09,962 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:02:09,962 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:02:09,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:02:09,975 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:02:10,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:02:13,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:02:13,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:02:13,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:02:13,632 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:02:13,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [659700613] [2022-01-31 18:02:13,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [659700613] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:02:13,632 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:02:13,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [109] imperfect sequences [] total 109 [2022-01-31 18:02:13,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436314388] [2022-01-31 18:02:13,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:02:13,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-01-31 18:02:13,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:02:13,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-01-31 18:02:13,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5780, Invalid=5992, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 18:02:13,636 INFO L87 Difference]: Start difference. First operand 440 states and 442 transitions. Second operand has 109 states, 109 states have (on average 2.0458715596330275) internal successors, (223), 108 states have internal predecessors, (223), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:02:19,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:02:19,004 INFO L93 Difference]: Finished difference Result 669 states and 674 transitions. [2022-01-31 18:02:19,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-01-31 18:02:19,004 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 2.0458715596330275) internal successors, (223), 108 states have internal predecessors, (223), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 435 [2022-01-31 18:02:19,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:02:19,005 INFO L225 Difference]: With dead ends: 669 [2022-01-31 18:02:19,005 INFO L226 Difference]: Without dead ends: 446 [2022-01-31 18:02:19,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5670 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=17334, Invalid=28676, Unknown=0, NotChecked=0, Total=46010 [2022-01-31 18:02:19,007 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 705 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 589 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 706 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1084 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 589 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:02:19,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [706 Valid, 46 Invalid, 1084 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [589 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:02:19,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2022-01-31 18:02:19,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 444. [2022-01-31 18:02:19,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 438 states have (on average 1.0068493150684932) internal successors, (441), 438 states have internal predecessors, (441), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:02:19,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 446 transitions. [2022-01-31 18:02:19,176 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 446 transitions. Word has length 435 [2022-01-31 18:02:19,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:02:19,176 INFO L470 AbstractCegarLoop]: Abstraction has 444 states and 446 transitions. [2022-01-31 18:02:19,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 2.0458715596330275) internal successors, (223), 108 states have internal predecessors, (223), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:02:19,177 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 446 transitions. [2022-01-31 18:02:19,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 440 [2022-01-31 18:02:19,178 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:02:19,178 INFO L514 BasicCegarLoop]: trace histogram [106, 106, 106, 106, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:02:19,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2022-01-31 18:02:19,178 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:02:19,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:02:19,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1648166027, now seen corresponding path program 106 times [2022-01-31 18:02:19,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:02:19,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1239327096] [2022-01-31 18:02:19,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:02:19,180 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:02:19,180 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:02:19,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:02:19,191 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:02:19,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:02:22,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:02:22,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:02:22,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:02:22,891 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:02:22,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1239327096] [2022-01-31 18:02:22,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1239327096] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:02:22,891 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:02:22,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [110] imperfect sequences [] total 110 [2022-01-31 18:02:22,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279482299] [2022-01-31 18:02:22,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:02:22,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-01-31 18:02:22,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:02:22,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-01-31 18:02:22,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5888, Invalid=6102, Unknown=0, NotChecked=0, Total=11990 [2022-01-31 18:02:22,894 INFO L87 Difference]: Start difference. First operand 444 states and 446 transitions. Second operand has 110 states, 110 states have (on average 2.0454545454545454) internal successors, (225), 109 states have internal predecessors, (225), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:02:28,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:02:28,443 INFO L93 Difference]: Finished difference Result 675 states and 680 transitions. [2022-01-31 18:02:28,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-01-31 18:02:28,444 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.0454545454545454) internal successors, (225), 109 states have internal predecessors, (225), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 439 [2022-01-31 18:02:28,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:02:28,445 INFO L225 Difference]: With dead ends: 675 [2022-01-31 18:02:28,445 INFO L226 Difference]: Without dead ends: 450 [2022-01-31 18:02:28,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5777 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=17658, Invalid=29214, Unknown=0, NotChecked=0, Total=46872 [2022-01-31 18:02:28,447 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 857 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 741 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 858 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 741 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:02:28,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [858 Valid, 46 Invalid, 1240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [741 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:02:28,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2022-01-31 18:02:28,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 448. [2022-01-31 18:02:28,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 442 states have (on average 1.006787330316742) internal successors, (445), 442 states have internal predecessors, (445), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:02:28,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 450 transitions. [2022-01-31 18:02:28,609 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 450 transitions. Word has length 439 [2022-01-31 18:02:28,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:02:28,609 INFO L470 AbstractCegarLoop]: Abstraction has 448 states and 450 transitions. [2022-01-31 18:02:28,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 2.0454545454545454) internal successors, (225), 109 states have internal predecessors, (225), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:02:28,609 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 450 transitions. [2022-01-31 18:02:28,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2022-01-31 18:02:28,611 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:02:28,611 INFO L514 BasicCegarLoop]: trace histogram [107, 107, 107, 107, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:02:28,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2022-01-31 18:02:28,611 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:02:28,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:02:28,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1329539335, now seen corresponding path program 107 times [2022-01-31 18:02:28,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:02:28,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1191640864] [2022-01-31 18:02:28,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:02:28,612 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:02:28,613 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:02:28,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:02:28,625 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:02:28,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:02:32,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:02:32,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:02:32,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:02:32,455 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:02:32,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1191640864] [2022-01-31 18:02:32,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1191640864] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:02:32,455 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:02:32,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [111] imperfect sequences [] total 111 [2022-01-31 18:02:32,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238603586] [2022-01-31 18:02:32,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:02:32,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-01-31 18:02:32,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:02:32,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-01-31 18:02:32,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5997, Invalid=6213, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 18:02:32,459 INFO L87 Difference]: Start difference. First operand 448 states and 450 transitions. Second operand has 111 states, 111 states have (on average 2.045045045045045) internal successors, (227), 110 states have internal predecessors, (227), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:02:38,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:02:38,219 INFO L93 Difference]: Finished difference Result 681 states and 686 transitions. [2022-01-31 18:02:38,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-01-31 18:02:38,219 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 2.045045045045045) internal successors, (227), 110 states have internal predecessors, (227), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 443 [2022-01-31 18:02:38,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:02:38,220 INFO L225 Difference]: With dead ends: 681 [2022-01-31 18:02:38,220 INFO L226 Difference]: Without dead ends: 454 [2022-01-31 18:02:38,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5885 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=17985, Invalid=29757, Unknown=0, NotChecked=0, Total=47742 [2022-01-31 18:02:38,222 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 800 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 681 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 801 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 681 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:02:38,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [801 Valid, 46 Invalid, 1184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [681 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:02:38,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2022-01-31 18:02:38,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 452. [2022-01-31 18:02:38,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 446 states have (on average 1.006726457399103) internal successors, (449), 446 states have internal predecessors, (449), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:02:38,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 454 transitions. [2022-01-31 18:02:38,369 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 454 transitions. Word has length 443 [2022-01-31 18:02:38,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:02:38,369 INFO L470 AbstractCegarLoop]: Abstraction has 452 states and 454 transitions. [2022-01-31 18:02:38,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 2.045045045045045) internal successors, (227), 110 states have internal predecessors, (227), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:02:38,369 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 454 transitions. [2022-01-31 18:02:38,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2022-01-31 18:02:38,371 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:02:38,371 INFO L514 BasicCegarLoop]: trace histogram [108, 108, 108, 108, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:02:38,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2022-01-31 18:02:38,371 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:02:38,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:02:38,371 INFO L85 PathProgramCache]: Analyzing trace with hash 320053123, now seen corresponding path program 108 times [2022-01-31 18:02:38,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:02:38,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [176860940] [2022-01-31 18:02:38,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:02:38,373 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:02:38,373 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:02:38,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:02:38,388 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:02:38,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:02:42,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:02:42,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:02:42,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:02:42,251 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:02:42,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [176860940] [2022-01-31 18:02:42,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [176860940] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:02:42,251 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:02:42,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [112] imperfect sequences [] total 112 [2022-01-31 18:02:42,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802453990] [2022-01-31 18:02:42,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:02:42,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-01-31 18:02:42,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:02:42,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-01-31 18:02:42,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6107, Invalid=6325, Unknown=0, NotChecked=0, Total=12432 [2022-01-31 18:02:42,255 INFO L87 Difference]: Start difference. First operand 452 states and 454 transitions. Second operand has 112 states, 112 states have (on average 2.044642857142857) internal successors, (229), 111 states have internal predecessors, (229), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:02:48,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:02:48,016 INFO L93 Difference]: Finished difference Result 687 states and 692 transitions. [2022-01-31 18:02:48,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-01-31 18:02:48,016 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 2.044642857142857) internal successors, (229), 111 states have internal predecessors, (229), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 447 [2022-01-31 18:02:48,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:02:48,017 INFO L225 Difference]: With dead ends: 687 [2022-01-31 18:02:48,017 INFO L226 Difference]: Without dead ends: 458 [2022-01-31 18:02:48,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5994 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=18315, Invalid=30305, Unknown=0, NotChecked=0, Total=48620 [2022-01-31 18:02:48,019 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 850 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 735 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 851 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 1216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 735 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:02:48,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [851 Valid, 36 Invalid, 1216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [735 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:02:48,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2022-01-31 18:02:48,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 456. [2022-01-31 18:02:48,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 450 states have (on average 1.0066666666666666) internal successors, (453), 450 states have internal predecessors, (453), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:02:48,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 458 transitions. [2022-01-31 18:02:48,179 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 458 transitions. Word has length 447 [2022-01-31 18:02:48,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:02:48,179 INFO L470 AbstractCegarLoop]: Abstraction has 456 states and 458 transitions. [2022-01-31 18:02:48,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 2.044642857142857) internal successors, (229), 111 states have internal predecessors, (229), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:02:48,180 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 458 transitions. [2022-01-31 18:02:48,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2022-01-31 18:02:48,181 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:02:48,181 INFO L514 BasicCegarLoop]: trace histogram [109, 109, 109, 109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:02:48,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2022-01-31 18:02:48,181 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:02:48,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:02:48,182 INFO L85 PathProgramCache]: Analyzing trace with hash -809146369, now seen corresponding path program 109 times [2022-01-31 18:02:48,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:02:48,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1658540283] [2022-01-31 18:02:48,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:02:48,183 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:02:48,183 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:02:48,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:02:48,197 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:02:48,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:02:52,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:02:52,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:02:52,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:02:52,132 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:02:52,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1658540283] [2022-01-31 18:02:52,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1658540283] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:02:52,132 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:02:52,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [113] imperfect sequences [] total 113 [2022-01-31 18:02:52,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211657864] [2022-01-31 18:02:52,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:02:52,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-01-31 18:02:52,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:02:52,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-01-31 18:02:52,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6218, Invalid=6438, Unknown=0, NotChecked=0, Total=12656 [2022-01-31 18:02:52,135 INFO L87 Difference]: Start difference. First operand 456 states and 458 transitions. Second operand has 113 states, 113 states have (on average 2.0442477876106193) internal successors, (231), 112 states have internal predecessors, (231), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:02:58,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:02:58,017 INFO L93 Difference]: Finished difference Result 693 states and 698 transitions. [2022-01-31 18:02:58,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-01-31 18:02:58,017 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 2.0442477876106193) internal successors, (231), 112 states have internal predecessors, (231), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 451 [2022-01-31 18:02:58,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:02:58,018 INFO L225 Difference]: With dead ends: 693 [2022-01-31 18:02:58,018 INFO L226 Difference]: Without dead ends: 462 [2022-01-31 18:02:58,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6104 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=18648, Invalid=30858, Unknown=0, NotChecked=0, Total=49506 [2022-01-31 18:02:58,020 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 716 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 597 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 717 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 1134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 597 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:02:58,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [717 Valid, 56 Invalid, 1134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [597 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:02:58,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2022-01-31 18:02:58,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 460. [2022-01-31 18:02:58,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 454 states have (on average 1.0066079295154184) internal successors, (457), 454 states have internal predecessors, (457), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:02:58,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 462 transitions. [2022-01-31 18:02:58,193 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 462 transitions. Word has length 451 [2022-01-31 18:02:58,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:02:58,194 INFO L470 AbstractCegarLoop]: Abstraction has 460 states and 462 transitions. [2022-01-31 18:02:58,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 2.0442477876106193) internal successors, (231), 112 states have internal predecessors, (231), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:02:58,194 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 462 transitions. [2022-01-31 18:02:58,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2022-01-31 18:02:58,195 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:02:58,195 INFO L514 BasicCegarLoop]: trace histogram [110, 110, 110, 110, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:02:58,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2022-01-31 18:02:58,196 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:02:58,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:02:58,196 INFO L85 PathProgramCache]: Analyzing trace with hash -656440709, now seen corresponding path program 110 times [2022-01-31 18:02:58,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:02:58,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [515658387] [2022-01-31 18:02:58,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:02:58,197 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:02:58,197 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:02:58,197 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:02:58,211 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:02:58,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:03:02,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:03:02,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:03:02,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:03:02,196 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:03:02,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [515658387] [2022-01-31 18:03:02,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [515658387] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:03:02,196 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:03:02,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [114] imperfect sequences [] total 114 [2022-01-31 18:03:02,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766328551] [2022-01-31 18:03:02,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:03:02,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2022-01-31 18:03:02,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:03:02,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2022-01-31 18:03:02,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6330, Invalid=6552, Unknown=0, NotChecked=0, Total=12882 [2022-01-31 18:03:02,199 INFO L87 Difference]: Start difference. First operand 460 states and 462 transitions. Second operand has 114 states, 114 states have (on average 2.043859649122807) internal successors, (233), 113 states have internal predecessors, (233), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:03:08,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:03:08,104 INFO L93 Difference]: Finished difference Result 699 states and 704 transitions. [2022-01-31 18:03:08,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-01-31 18:03:08,104 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 2.043859649122807) internal successors, (233), 113 states have internal predecessors, (233), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 455 [2022-01-31 18:03:08,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:03:08,105 INFO L225 Difference]: With dead ends: 699 [2022-01-31 18:03:08,105 INFO L226 Difference]: Without dead ends: 466 [2022-01-31 18:03:08,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6215 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=18984, Invalid=31416, Unknown=0, NotChecked=0, Total=50400 [2022-01-31 18:03:08,108 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 838 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 720 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 839 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 1261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 720 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:03:08,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [839 Valid, 56 Invalid, 1261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [720 Valid, 541 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:03:08,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2022-01-31 18:03:08,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 464. [2022-01-31 18:03:08,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 458 states have (on average 1.0065502183406114) internal successors, (461), 458 states have internal predecessors, (461), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:03:08,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 466 transitions. [2022-01-31 18:03:08,286 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 466 transitions. Word has length 455 [2022-01-31 18:03:08,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:03:08,286 INFO L470 AbstractCegarLoop]: Abstraction has 464 states and 466 transitions. [2022-01-31 18:03:08,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 2.043859649122807) internal successors, (233), 113 states have internal predecessors, (233), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:03:08,286 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 466 transitions. [2022-01-31 18:03:08,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2022-01-31 18:03:08,288 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:03:08,288 INFO L514 BasicCegarLoop]: trace histogram [111, 111, 111, 111, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:03:08,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2022-01-31 18:03:08,288 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:03:08,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:03:08,288 INFO L85 PathProgramCache]: Analyzing trace with hash 862777079, now seen corresponding path program 111 times [2022-01-31 18:03:08,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:03:08,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [108808574] [2022-01-31 18:03:08,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:03:08,289 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:03:08,289 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:03:08,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:03:08,303 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:03:08,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:03:12,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:03:12,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:03:12,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:03:12,482 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:03:12,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [108808574] [2022-01-31 18:03:12,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [108808574] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:03:12,482 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:03:12,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [115] imperfect sequences [] total 115 [2022-01-31 18:03:12,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436982413] [2022-01-31 18:03:12,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:03:12,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-01-31 18:03:12,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:03:12,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-01-31 18:03:12,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6443, Invalid=6667, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 18:03:12,485 INFO L87 Difference]: Start difference. First operand 464 states and 466 transitions. Second operand has 115 states, 115 states have (on average 2.0434782608695654) internal successors, (235), 114 states have internal predecessors, (235), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:03:18,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:03:18,540 INFO L93 Difference]: Finished difference Result 705 states and 710 transitions. [2022-01-31 18:03:18,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-01-31 18:03:18,540 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 2.0434782608695654) internal successors, (235), 114 states have internal predecessors, (235), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 459 [2022-01-31 18:03:18,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:03:18,541 INFO L225 Difference]: With dead ends: 705 [2022-01-31 18:03:18,541 INFO L226 Difference]: Without dead ends: 470 [2022-01-31 18:03:18,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6327 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=19323, Invalid=31979, Unknown=0, NotChecked=0, Total=51302 [2022-01-31 18:03:18,544 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 816 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 694 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 817 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 1200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 694 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:03:18,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [817 Valid, 41 Invalid, 1200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [694 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:03:18,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2022-01-31 18:03:18,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 468. [2022-01-31 18:03:18,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 462 states have (on average 1.0064935064935066) internal successors, (465), 462 states have internal predecessors, (465), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:03:18,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 470 transitions. [2022-01-31 18:03:18,719 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 470 transitions. Word has length 459 [2022-01-31 18:03:18,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:03:18,719 INFO L470 AbstractCegarLoop]: Abstraction has 468 states and 470 transitions. [2022-01-31 18:03:18,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 2.0434782608695654) internal successors, (235), 114 states have internal predecessors, (235), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:03:18,719 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 470 transitions. [2022-01-31 18:03:18,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2022-01-31 18:03:18,721 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:03:18,721 INFO L514 BasicCegarLoop]: trace histogram [112, 112, 112, 112, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:03:18,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2022-01-31 18:03:18,721 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:03:18,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:03:18,721 INFO L85 PathProgramCache]: Analyzing trace with hash 368618867, now seen corresponding path program 112 times [2022-01-31 18:03:18,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:03:18,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [782828842] [2022-01-31 18:03:18,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:03:18,722 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:03:18,723 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:03:18,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:03:18,738 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:03:18,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:03:22,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:03:22,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:03:22,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:03:22,865 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:03:22,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [782828842] [2022-01-31 18:03:22,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [782828842] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:03:22,865 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:03:22,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [116] imperfect sequences [] total 116 [2022-01-31 18:03:22,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655626430] [2022-01-31 18:03:22,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:03:22,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-01-31 18:03:22,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:03:22,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-01-31 18:03:22,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6557, Invalid=6783, Unknown=0, NotChecked=0, Total=13340 [2022-01-31 18:03:22,868 INFO L87 Difference]: Start difference. First operand 468 states and 470 transitions. Second operand has 116 states, 116 states have (on average 2.043103448275862) internal successors, (237), 115 states have internal predecessors, (237), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:03:29,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:03:29,096 INFO L93 Difference]: Finished difference Result 711 states and 716 transitions. [2022-01-31 18:03:29,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-01-31 18:03:29,096 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 2.043103448275862) internal successors, (237), 115 states have internal predecessors, (237), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 463 [2022-01-31 18:03:29,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:03:29,097 INFO L225 Difference]: With dead ends: 711 [2022-01-31 18:03:29,097 INFO L226 Difference]: Without dead ends: 474 [2022-01-31 18:03:29,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6440 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=19665, Invalid=32547, Unknown=0, NotChecked=0, Total=52212 [2022-01-31 18:03:29,099 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 811 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 689 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 812 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 689 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:03:29,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [812 Valid, 46 Invalid, 1212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [689 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:03:29,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2022-01-31 18:03:29,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 472. [2022-01-31 18:03:29,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 466 states have (on average 1.0064377682403434) internal successors, (469), 466 states have internal predecessors, (469), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:03:29,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 474 transitions. [2022-01-31 18:03:29,260 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 474 transitions. Word has length 463 [2022-01-31 18:03:29,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:03:29,260 INFO L470 AbstractCegarLoop]: Abstraction has 472 states and 474 transitions. [2022-01-31 18:03:29,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 2.043103448275862) internal successors, (237), 115 states have internal predecessors, (237), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:03:29,260 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 474 transitions. [2022-01-31 18:03:29,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2022-01-31 18:03:29,262 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:03:29,262 INFO L514 BasicCegarLoop]: trace histogram [113, 113, 113, 113, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:03:29,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2022-01-31 18:03:29,262 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:03:29,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:03:29,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1754119663, now seen corresponding path program 113 times [2022-01-31 18:03:29,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:03:29,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1918836767] [2022-01-31 18:03:29,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:03:29,263 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:03:29,263 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:03:29,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:03:29,277 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:03:29,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:03:33,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:03:33,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:03:33,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:03:33,508 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:03:33,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1918836767] [2022-01-31 18:03:33,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1918836767] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:03:33,508 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:03:33,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [117] imperfect sequences [] total 117 [2022-01-31 18:03:33,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155770180] [2022-01-31 18:03:33,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:03:33,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-01-31 18:03:33,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:03:33,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-01-31 18:03:33,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6672, Invalid=6900, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 18:03:33,511 INFO L87 Difference]: Start difference. First operand 472 states and 474 transitions. Second operand has 117 states, 117 states have (on average 2.0427350427350426) internal successors, (239), 116 states have internal predecessors, (239), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:03:39,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:03:39,735 INFO L93 Difference]: Finished difference Result 717 states and 722 transitions. [2022-01-31 18:03:39,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-01-31 18:03:39,735 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 2.0427350427350426) internal successors, (239), 116 states have internal predecessors, (239), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 467 [2022-01-31 18:03:39,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:03:39,736 INFO L225 Difference]: With dead ends: 717 [2022-01-31 18:03:39,736 INFO L226 Difference]: Without dead ends: 478 [2022-01-31 18:03:39,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6554 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=20010, Invalid=33120, Unknown=0, NotChecked=0, Total=53130 [2022-01-31 18:03:39,738 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 782 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 660 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 783 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 1213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 660 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:03:39,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [783 Valid, 56 Invalid, 1213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [660 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:03:39,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2022-01-31 18:03:39,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 476. [2022-01-31 18:03:39,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 470 states have (on average 1.0063829787234042) internal successors, (473), 470 states have internal predecessors, (473), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:03:39,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 478 transitions. [2022-01-31 18:03:39,901 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 478 transitions. Word has length 467 [2022-01-31 18:03:39,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:03:39,901 INFO L470 AbstractCegarLoop]: Abstraction has 476 states and 478 transitions. [2022-01-31 18:03:39,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 2.0427350427350426) internal successors, (239), 116 states have internal predecessors, (239), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:03:39,901 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 478 transitions. [2022-01-31 18:03:39,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2022-01-31 18:03:39,903 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:03:39,903 INFO L514 BasicCegarLoop]: trace histogram [114, 114, 114, 114, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:03:39,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2022-01-31 18:03:39,903 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:03:39,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:03:39,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1152852075, now seen corresponding path program 114 times [2022-01-31 18:03:39,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:03:39,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1591342693] [2022-01-31 18:03:39,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:03:39,905 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:03:39,905 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:03:39,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:03:39,920 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:03:40,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:03:44,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:03:44,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:03:44,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:03:44,290 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:03:44,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1591342693] [2022-01-31 18:03:44,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1591342693] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:03:44,290 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:03:44,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [118] imperfect sequences [] total 118 [2022-01-31 18:03:44,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103088024] [2022-01-31 18:03:44,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:03:44,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2022-01-31 18:03:44,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:03:44,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2022-01-31 18:03:44,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6788, Invalid=7018, Unknown=0, NotChecked=0, Total=13806 [2022-01-31 18:03:44,294 INFO L87 Difference]: Start difference. First operand 476 states and 478 transitions. Second operand has 118 states, 118 states have (on average 2.042372881355932) internal successors, (241), 117 states have internal predecessors, (241), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:03:50,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:03:50,620 INFO L93 Difference]: Finished difference Result 723 states and 728 transitions. [2022-01-31 18:03:50,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-01-31 18:03:50,620 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 2.042372881355932) internal successors, (241), 117 states have internal predecessors, (241), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 471 [2022-01-31 18:03:50,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:03:50,621 INFO L225 Difference]: With dead ends: 723 [2022-01-31 18:03:50,621 INFO L226 Difference]: Without dead ends: 482 [2022-01-31 18:03:50,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6669 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=20358, Invalid=33698, Unknown=0, NotChecked=0, Total=54056 [2022-01-31 18:03:50,623 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 955 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 832 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 956 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 1337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 832 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:03:50,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [956 Valid, 36 Invalid, 1337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [832 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:03:50,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2022-01-31 18:03:50,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 480. [2022-01-31 18:03:50,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 474 states have (on average 1.0063291139240507) internal successors, (477), 474 states have internal predecessors, (477), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:03:50,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 482 transitions. [2022-01-31 18:03:50,810 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 482 transitions. Word has length 471 [2022-01-31 18:03:50,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:03:50,810 INFO L470 AbstractCegarLoop]: Abstraction has 480 states and 482 transitions. [2022-01-31 18:03:50,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 2.042372881355932) internal successors, (241), 117 states have internal predecessors, (241), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:03:50,811 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 482 transitions. [2022-01-31 18:03:50,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2022-01-31 18:03:50,812 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:03:50,812 INFO L514 BasicCegarLoop]: trace histogram [115, 115, 115, 115, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:03:50,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2022-01-31 18:03:50,812 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:03:50,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:03:50,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1971311847, now seen corresponding path program 115 times [2022-01-31 18:03:50,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:03:50,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1523859935] [2022-01-31 18:03:50,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:03:50,814 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:03:50,814 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:03:50,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:03:50,828 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:03:50,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:03:55,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:03:55,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:03:55,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:03:55,212 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:03:55,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1523859935] [2022-01-31 18:03:55,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1523859935] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:03:55,213 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:03:55,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [119] imperfect sequences [] total 119 [2022-01-31 18:03:55,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314782704] [2022-01-31 18:03:55,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:03:55,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-01-31 18:03:55,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:03:55,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-01-31 18:03:55,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6905, Invalid=7137, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 18:03:55,215 INFO L87 Difference]: Start difference. First operand 480 states and 482 transitions. Second operand has 119 states, 119 states have (on average 2.042016806722689) internal successors, (243), 118 states have internal predecessors, (243), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:04:01,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:04:01,700 INFO L93 Difference]: Finished difference Result 729 states and 734 transitions. [2022-01-31 18:04:01,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-01-31 18:04:01,700 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 2.042016806722689) internal successors, (243), 118 states have internal predecessors, (243), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 475 [2022-01-31 18:04:01,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:04:01,701 INFO L225 Difference]: With dead ends: 729 [2022-01-31 18:04:01,701 INFO L226 Difference]: Without dead ends: 486 [2022-01-31 18:04:01,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6785 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=20709, Invalid=34281, Unknown=0, NotChecked=0, Total=54990 [2022-01-31 18:04:01,703 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 858 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 733 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 859 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 1281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 733 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:04:01,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [859 Valid, 51 Invalid, 1281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [733 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:04:01,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2022-01-31 18:04:01,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 484. [2022-01-31 18:04:01,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 478 states have (on average 1.006276150627615) internal successors, (481), 478 states have internal predecessors, (481), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:04:01,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 486 transitions. [2022-01-31 18:04:01,875 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 486 transitions. Word has length 475 [2022-01-31 18:04:01,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:04:01,875 INFO L470 AbstractCegarLoop]: Abstraction has 484 states and 486 transitions. [2022-01-31 18:04:01,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 2.042016806722689) internal successors, (243), 118 states have internal predecessors, (243), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:04:01,875 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 486 transitions. [2022-01-31 18:04:01,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2022-01-31 18:04:01,877 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:04:01,877 INFO L514 BasicCegarLoop]: trace histogram [116, 116, 116, 116, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:04:01,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2022-01-31 18:04:01,877 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:04:01,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:04:01,877 INFO L85 PathProgramCache]: Analyzing trace with hash -143467677, now seen corresponding path program 116 times [2022-01-31 18:04:01,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:04:01,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [368669847] [2022-01-31 18:04:01,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:04:01,879 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:04:01,879 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:04:01,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:04:01,893 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:04:02,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:04:06,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:04:06,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:04:06,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:04:06,364 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:04:06,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [368669847] [2022-01-31 18:04:06,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [368669847] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:04:06,364 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:04:06,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [120] imperfect sequences [] total 120 [2022-01-31 18:04:06,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731112222] [2022-01-31 18:04:06,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:04:06,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2022-01-31 18:04:06,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:04:06,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2022-01-31 18:04:06,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7023, Invalid=7257, Unknown=0, NotChecked=0, Total=14280 [2022-01-31 18:04:06,367 INFO L87 Difference]: Start difference. First operand 484 states and 486 transitions. Second operand has 120 states, 120 states have (on average 2.0416666666666665) internal successors, (245), 119 states have internal predecessors, (245), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:04:12,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:04:12,959 INFO L93 Difference]: Finished difference Result 735 states and 740 transitions. [2022-01-31 18:04:12,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-01-31 18:04:12,960 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 2.0416666666666665) internal successors, (245), 119 states have internal predecessors, (245), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 479 [2022-01-31 18:04:12,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:04:12,961 INFO L225 Difference]: With dead ends: 735 [2022-01-31 18:04:12,961 INFO L226 Difference]: Without dead ends: 490 [2022-01-31 18:04:12,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6902 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=21063, Invalid=34869, Unknown=0, NotChecked=0, Total=55932 [2022-01-31 18:04:12,963 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 840 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 717 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 841 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 1269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 717 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:04:12,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [841 Valid, 51 Invalid, 1269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [717 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:04:12,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2022-01-31 18:04:13,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 488. [2022-01-31 18:04:13,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 482 states have (on average 1.0062240663900415) internal successors, (485), 482 states have internal predecessors, (485), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:04:13,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 490 transitions. [2022-01-31 18:04:13,153 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 490 transitions. Word has length 479 [2022-01-31 18:04:13,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:04:13,154 INFO L470 AbstractCegarLoop]: Abstraction has 488 states and 490 transitions. [2022-01-31 18:04:13,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 120 states have (on average 2.0416666666666665) internal successors, (245), 119 states have internal predecessors, (245), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:04:13,154 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 490 transitions. [2022-01-31 18:04:13,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2022-01-31 18:04:13,155 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:04:13,156 INFO L514 BasicCegarLoop]: trace histogram [117, 117, 117, 117, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:04:13,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2022-01-31 18:04:13,156 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:04:13,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:04:13,156 INFO L85 PathProgramCache]: Analyzing trace with hash 2023437279, now seen corresponding path program 117 times [2022-01-31 18:04:13,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:04:13,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1858317336] [2022-01-31 18:04:13,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:04:13,157 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:04:13,157 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:04:13,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:04:13,172 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:04:13,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:04:17,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:04:17,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:04:17,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:04:17,628 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:04:17,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1858317336] [2022-01-31 18:04:17,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1858317336] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:04:17,629 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:04:17,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [121] imperfect sequences [] total 121 [2022-01-31 18:04:17,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502229551] [2022-01-31 18:04:17,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:04:17,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2022-01-31 18:04:17,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:04:17,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2022-01-31 18:04:17,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7142, Invalid=7378, Unknown=0, NotChecked=0, Total=14520 [2022-01-31 18:04:17,632 INFO L87 Difference]: Start difference. First operand 488 states and 490 transitions. Second operand has 121 states, 121 states have (on average 2.041322314049587) internal successors, (247), 120 states have internal predecessors, (247), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:04:24,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:04:24,479 INFO L93 Difference]: Finished difference Result 741 states and 746 transitions. [2022-01-31 18:04:24,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-01-31 18:04:24,480 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 2.041322314049587) internal successors, (247), 120 states have internal predecessors, (247), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 483 [2022-01-31 18:04:24,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:04:24,481 INFO L225 Difference]: With dead ends: 741 [2022-01-31 18:04:24,481 INFO L226 Difference]: Without dead ends: 494 [2022-01-31 18:04:24,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7020 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=21420, Invalid=35462, Unknown=0, NotChecked=0, Total=56882 [2022-01-31 18:04:24,485 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 834 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 707 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 835 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 1276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 707 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:04:24,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [835 Valid, 56 Invalid, 1276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [707 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:04:24,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2022-01-31 18:04:24,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 492. [2022-01-31 18:04:24,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 486 states have (on average 1.0061728395061729) internal successors, (489), 486 states have internal predecessors, (489), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:04:24,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 494 transitions. [2022-01-31 18:04:24,690 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 494 transitions. Word has length 483 [2022-01-31 18:04:24,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:04:24,690 INFO L470 AbstractCegarLoop]: Abstraction has 492 states and 494 transitions. [2022-01-31 18:04:24,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 2.041322314049587) internal successors, (247), 120 states have internal predecessors, (247), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:04:24,690 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 494 transitions. [2022-01-31 18:04:24,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2022-01-31 18:04:24,692 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:04:24,692 INFO L514 BasicCegarLoop]: trace histogram [118, 118, 118, 118, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:04:24,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2022-01-31 18:04:24,692 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:04:24,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:04:24,692 INFO L85 PathProgramCache]: Analyzing trace with hash -662446501, now seen corresponding path program 118 times [2022-01-31 18:04:24,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:04:24,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [159935850] [2022-01-31 18:04:24,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:04:24,693 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:04:24,693 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:04:24,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:04:24,709 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:04:24,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:04:29,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:04:29,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:04:29,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:04:29,242 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:04:29,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [159935850] [2022-01-31 18:04:29,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [159935850] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:04:29,242 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:04:29,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [122] imperfect sequences [] total 122 [2022-01-31 18:04:29,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270156778] [2022-01-31 18:04:29,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:04:29,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2022-01-31 18:04:29,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:04:29,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2022-01-31 18:04:29,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7262, Invalid=7500, Unknown=0, NotChecked=0, Total=14762 [2022-01-31 18:04:29,245 INFO L87 Difference]: Start difference. First operand 492 states and 494 transitions. Second operand has 122 states, 122 states have (on average 2.040983606557377) internal successors, (249), 121 states have internal predecessors, (249), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:04:36,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:04:36,215 INFO L93 Difference]: Finished difference Result 747 states and 752 transitions. [2022-01-31 18:04:36,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-01-31 18:04:36,216 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 2.040983606557377) internal successors, (249), 121 states have internal predecessors, (249), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 487 [2022-01-31 18:04:36,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:04:36,217 INFO L225 Difference]: With dead ends: 747 [2022-01-31 18:04:36,217 INFO L226 Difference]: Without dead ends: 498 [2022-01-31 18:04:36,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7139 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=21780, Invalid=36060, Unknown=0, NotChecked=0, Total=57840 [2022-01-31 18:04:36,219 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 880 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 752 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 881 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 1273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 752 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:04:36,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [881 Valid, 36 Invalid, 1273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [752 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:04:36,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2022-01-31 18:04:36,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 496. [2022-01-31 18:04:36,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 490 states have (on average 1.006122448979592) internal successors, (493), 490 states have internal predecessors, (493), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:04:36,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 498 transitions. [2022-01-31 18:04:36,415 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 498 transitions. Word has length 487 [2022-01-31 18:04:36,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:04:36,416 INFO L470 AbstractCegarLoop]: Abstraction has 496 states and 498 transitions. [2022-01-31 18:04:36,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 2.040983606557377) internal successors, (249), 121 states have internal predecessors, (249), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:04:36,416 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 498 transitions. [2022-01-31 18:04:36,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2022-01-31 18:04:36,418 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:04:36,418 INFO L514 BasicCegarLoop]: trace histogram [119, 119, 119, 119, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:04:36,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2022-01-31 18:04:36,418 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:04:36,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:04:36,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1472734505, now seen corresponding path program 119 times [2022-01-31 18:04:36,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:04:36,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1190997869] [2022-01-31 18:04:36,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:04:36,419 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:04:36,419 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:04:36,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:04:36,436 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:04:36,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:04:41,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:04:41,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:04:41,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:04:41,155 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:04:41,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1190997869] [2022-01-31 18:04:41,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1190997869] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:04:41,155 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:04:41,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [123] imperfect sequences [] total 123 [2022-01-31 18:04:41,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266892064] [2022-01-31 18:04:41,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:04:41,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-01-31 18:04:41,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:04:41,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-01-31 18:04:41,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7383, Invalid=7623, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 18:04:41,158 INFO L87 Difference]: Start difference. First operand 496 states and 498 transitions. Second operand has 123 states, 123 states have (on average 2.040650406504065) internal successors, (251), 122 states have internal predecessors, (251), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:04:48,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:04:48,143 INFO L93 Difference]: Finished difference Result 753 states and 758 transitions. [2022-01-31 18:04:48,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-01-31 18:04:48,144 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 2.040650406504065) internal successors, (251), 122 states have internal predecessors, (251), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 491 [2022-01-31 18:04:48,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:04:48,144 INFO L225 Difference]: With dead ends: 753 [2022-01-31 18:04:48,144 INFO L226 Difference]: Without dead ends: 502 [2022-01-31 18:04:48,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7259 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=22143, Invalid=36663, Unknown=0, NotChecked=0, Total=58806 [2022-01-31 18:04:48,147 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 823 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 692 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 824 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 1230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 692 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:04:48,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [824 Valid, 41 Invalid, 1230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [692 Valid, 538 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:04:48,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2022-01-31 18:04:48,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 500. [2022-01-31 18:04:48,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 494 states have (on average 1.0060728744939271) internal successors, (497), 494 states have internal predecessors, (497), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:04:48,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 502 transitions. [2022-01-31 18:04:48,346 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 502 transitions. Word has length 491 [2022-01-31 18:04:48,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:04:48,346 INFO L470 AbstractCegarLoop]: Abstraction has 500 states and 502 transitions. [2022-01-31 18:04:48,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 2.040650406504065) internal successors, (251), 122 states have internal predecessors, (251), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:04:48,346 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 502 transitions. [2022-01-31 18:04:48,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2022-01-31 18:04:48,348 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:04:48,348 INFO L514 BasicCegarLoop]: trace histogram [120, 120, 120, 120, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:04:48,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2022-01-31 18:04:48,349 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:04:48,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:04:48,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1438504621, now seen corresponding path program 120 times [2022-01-31 18:04:48,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:04:48,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1148336360] [2022-01-31 18:04:48,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:04:48,350 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:04:48,350 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:04:48,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:04:48,365 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:04:48,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:04:53,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:04:53,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:04:53,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:04:53,124 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:04:53,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1148336360] [2022-01-31 18:04:53,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1148336360] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:04:53,124 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:04:53,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [124] imperfect sequences [] total 124 [2022-01-31 18:04:53,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885936633] [2022-01-31 18:04:53,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:04:53,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2022-01-31 18:04:53,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:04:53,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2022-01-31 18:04:53,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7505, Invalid=7747, Unknown=0, NotChecked=0, Total=15252 [2022-01-31 18:04:53,127 INFO L87 Difference]: Start difference. First operand 500 states and 502 transitions. Second operand has 124 states, 124 states have (on average 2.0403225806451615) internal successors, (253), 123 states have internal predecessors, (253), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:05:00,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:05:00,253 INFO L93 Difference]: Finished difference Result 759 states and 764 transitions. [2022-01-31 18:05:00,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-01-31 18:05:00,253 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 2.0403225806451615) internal successors, (253), 123 states have internal predecessors, (253), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 495 [2022-01-31 18:05:00,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:05:00,254 INFO L225 Difference]: With dead ends: 759 [2022-01-31 18:05:00,254 INFO L226 Difference]: Without dead ends: 506 [2022-01-31 18:05:00,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7380 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=22509, Invalid=37271, Unknown=0, NotChecked=0, Total=59780 [2022-01-31 18:05:00,256 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 882 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 755 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 883 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 1297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 755 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:05:00,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [883 Valid, 41 Invalid, 1297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [755 Valid, 542 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:05:00,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2022-01-31 18:05:00,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 504. [2022-01-31 18:05:00,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 498 states have (on average 1.0060240963855422) internal successors, (501), 498 states have internal predecessors, (501), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:05:00,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 506 transitions. [2022-01-31 18:05:00,466 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 506 transitions. Word has length 495 [2022-01-31 18:05:00,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:05:00,467 INFO L470 AbstractCegarLoop]: Abstraction has 504 states and 506 transitions. [2022-01-31 18:05:00,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 2.0403225806451615) internal successors, (253), 123 states have internal predecessors, (253), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:05:00,467 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 506 transitions. [2022-01-31 18:05:00,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2022-01-31 18:05:00,469 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:05:00,469 INFO L514 BasicCegarLoop]: trace histogram [121, 121, 121, 121, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:05:00,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2022-01-31 18:05:00,469 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:05:00,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:05:00,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1387121103, now seen corresponding path program 121 times [2022-01-31 18:05:00,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:05:00,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [858695669] [2022-01-31 18:05:00,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:05:00,470 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:05:00,470 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:05:00,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:05:00,486 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:05:00,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:05:05,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:05:05,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:05:05,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:05:05,272 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:05:05,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [858695669] [2022-01-31 18:05:05,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [858695669] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:05:05,272 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:05:05,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [125] imperfect sequences [] total 125 [2022-01-31 18:05:05,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89584483] [2022-01-31 18:05:05,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:05:05,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2022-01-31 18:05:05,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:05:05,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2022-01-31 18:05:05,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7628, Invalid=7872, Unknown=0, NotChecked=0, Total=15500 [2022-01-31 18:05:05,276 INFO L87 Difference]: Start difference. First operand 504 states and 506 transitions. Second operand has 125 states, 125 states have (on average 2.04) internal successors, (255), 124 states have internal predecessors, (255), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:05:12,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:05:12,406 INFO L93 Difference]: Finished difference Result 765 states and 770 transitions. [2022-01-31 18:05:12,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-01-31 18:05:12,406 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 2.04) internal successors, (255), 124 states have internal predecessors, (255), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 499 [2022-01-31 18:05:12,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:05:12,407 INFO L225 Difference]: With dead ends: 765 [2022-01-31 18:05:12,407 INFO L226 Difference]: Without dead ends: 510 [2022-01-31 18:05:12,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7502 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=22878, Invalid=37884, Unknown=0, NotChecked=0, Total=60762 [2022-01-31 18:05:12,409 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 936 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 804 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 937 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 1376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 804 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:05:12,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [937 Valid, 51 Invalid, 1376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [804 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:05:12,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2022-01-31 18:05:12,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 508. [2022-01-31 18:05:12,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 502 states have (on average 1.0059760956175299) internal successors, (505), 502 states have internal predecessors, (505), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:05:12,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 510 transitions. [2022-01-31 18:05:12,616 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 510 transitions. Word has length 499 [2022-01-31 18:05:12,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:05:12,616 INFO L470 AbstractCegarLoop]: Abstraction has 508 states and 510 transitions. [2022-01-31 18:05:12,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 2.04) internal successors, (255), 124 states have internal predecessors, (255), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:05:12,617 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 510 transitions. [2022-01-31 18:05:12,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 504 [2022-01-31 18:05:12,618 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:05:12,618 INFO L514 BasicCegarLoop]: trace histogram [122, 122, 122, 122, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:05:12,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2022-01-31 18:05:12,619 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:05:12,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:05:12,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1191558219, now seen corresponding path program 122 times [2022-01-31 18:05:12,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:05:12,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1651277620] [2022-01-31 18:05:12,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:05:12,620 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:05:12,620 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:05:12,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:05:12,635 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:05:12,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:05:17,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:05:17,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:05:17,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:05:17,548 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:05:17,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1651277620] [2022-01-31 18:05:17,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1651277620] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:05:17,551 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:05:17,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [126] imperfect sequences [] total 126 [2022-01-31 18:05:17,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810481804] [2022-01-31 18:05:17,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:05:17,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2022-01-31 18:05:17,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:05:17,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2022-01-31 18:05:17,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7752, Invalid=7998, Unknown=0, NotChecked=0, Total=15750 [2022-01-31 18:05:17,556 INFO L87 Difference]: Start difference. First operand 508 states and 510 transitions. Second operand has 126 states, 126 states have (on average 2.0396825396825395) internal successors, (257), 125 states have internal predecessors, (257), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:05:24,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:05:24,844 INFO L93 Difference]: Finished difference Result 771 states and 776 transitions. [2022-01-31 18:05:24,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-01-31 18:05:24,845 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 2.0396825396825395) internal successors, (257), 125 states have internal predecessors, (257), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 503 [2022-01-31 18:05:24,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:05:24,845 INFO L225 Difference]: With dead ends: 771 [2022-01-31 18:05:24,845 INFO L226 Difference]: Without dead ends: 514 [2022-01-31 18:05:24,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7625 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=23250, Invalid=38502, Unknown=0, NotChecked=0, Total=61752 [2022-01-31 18:05:24,848 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 938 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 805 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 939 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 1316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 805 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:05:24,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [939 Valid, 26 Invalid, 1316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [805 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:05:24,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2022-01-31 18:05:25,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 512. [2022-01-31 18:05:25,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 506 states have (on average 1.0059288537549407) internal successors, (509), 506 states have internal predecessors, (509), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:05:25,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 514 transitions. [2022-01-31 18:05:25,039 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 514 transitions. Word has length 503 [2022-01-31 18:05:25,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:05:25,039 INFO L470 AbstractCegarLoop]: Abstraction has 512 states and 514 transitions. [2022-01-31 18:05:25,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 2.0396825396825395) internal successors, (257), 125 states have internal predecessors, (257), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:05:25,040 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 514 transitions. [2022-01-31 18:05:25,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2022-01-31 18:05:25,041 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:05:25,042 INFO L514 BasicCegarLoop]: trace histogram [123, 123, 123, 123, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:05:25,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2022-01-31 18:05:25,042 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:05:25,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:05:25,042 INFO L85 PathProgramCache]: Analyzing trace with hash -564854585, now seen corresponding path program 123 times [2022-01-31 18:05:25,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:05:25,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [376126662] [2022-01-31 18:05:25,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:05:25,043 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:05:25,043 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:05:25,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:05:25,068 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:05:25,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:05:29,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:05:29,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:05:30,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:05:30,001 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:05:30,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [376126662] [2022-01-31 18:05:30,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [376126662] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:05:30,001 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:05:30,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [127] imperfect sequences [] total 127 [2022-01-31 18:05:30,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942736261] [2022-01-31 18:05:30,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:05:30,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2022-01-31 18:05:30,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:05:30,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2022-01-31 18:05:30,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7877, Invalid=8125, Unknown=0, NotChecked=0, Total=16002 [2022-01-31 18:05:30,004 INFO L87 Difference]: Start difference. First operand 512 states and 514 transitions. Second operand has 127 states, 127 states have (on average 2.0393700787401574) internal successors, (259), 126 states have internal predecessors, (259), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:05:37,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:05:37,520 INFO L93 Difference]: Finished difference Result 777 states and 782 transitions. [2022-01-31 18:05:37,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-01-31 18:05:37,520 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 2.0393700787401574) internal successors, (259), 126 states have internal predecessors, (259), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 507 [2022-01-31 18:05:37,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:05:37,521 INFO L225 Difference]: With dead ends: 777 [2022-01-31 18:05:37,521 INFO L226 Difference]: Without dead ends: 518 [2022-01-31 18:05:37,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 249 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7749 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=23625, Invalid=39125, Unknown=0, NotChecked=0, Total=62750 [2022-01-31 18:05:37,523 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 918 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 619 mSolverCounterSat, 785 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 919 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 1404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 785 IncrementalHoareTripleChecker+Valid, 619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:05:37,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [919 Valid, 66 Invalid, 1404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [785 Valid, 619 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:05:37,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2022-01-31 18:05:37,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 516. [2022-01-31 18:05:37,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 510 states have (on average 1.0058823529411764) internal successors, (513), 510 states have internal predecessors, (513), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:05:37,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 518 transitions. [2022-01-31 18:05:37,733 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 518 transitions. Word has length 507 [2022-01-31 18:05:37,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:05:37,733 INFO L470 AbstractCegarLoop]: Abstraction has 516 states and 518 transitions. [2022-01-31 18:05:37,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 127 states have (on average 2.0393700787401574) internal successors, (259), 126 states have internal predecessors, (259), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:05:37,733 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 518 transitions. [2022-01-31 18:05:37,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2022-01-31 18:05:37,735 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:05:37,735 INFO L514 BasicCegarLoop]: trace histogram [124, 124, 124, 124, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:05:37,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2022-01-31 18:05:37,736 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:05:37,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:05:37,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1591306429, now seen corresponding path program 124 times [2022-01-31 18:05:37,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:05:37,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1684223221] [2022-01-31 18:05:37,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:05:37,737 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:05:37,737 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:05:37,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:05:37,753 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:05:37,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:05:42,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:05:42,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:05:42,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:05:42,801 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:05:42,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1684223221] [2022-01-31 18:05:42,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1684223221] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:05:42,801 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:05:42,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [128] imperfect sequences [] total 128 [2022-01-31 18:05:42,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80987997] [2022-01-31 18:05:42,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:05:42,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-01-31 18:05:42,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:05:42,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-01-31 18:05:42,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8003, Invalid=8253, Unknown=0, NotChecked=0, Total=16256 [2022-01-31 18:05:42,803 INFO L87 Difference]: Start difference. First operand 516 states and 518 transitions. Second operand has 128 states, 128 states have (on average 2.0390625) internal successors, (261), 127 states have internal predecessors, (261), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:05:50,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:05:50,407 INFO L93 Difference]: Finished difference Result 783 states and 788 transitions. [2022-01-31 18:05:50,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-01-31 18:05:50,408 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 2.0390625) internal successors, (261), 127 states have internal predecessors, (261), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 511 [2022-01-31 18:05:50,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:05:50,408 INFO L225 Difference]: With dead ends: 783 [2022-01-31 18:05:50,408 INFO L226 Difference]: Without dead ends: 522 [2022-01-31 18:05:50,411 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7874 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=24003, Invalid=39753, Unknown=0, NotChecked=0, Total=63756 [2022-01-31 18:05:50,411 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 976 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 845 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 977 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 1390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 845 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:05:50,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [977 Valid, 36 Invalid, 1390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [845 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:05:50,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2022-01-31 18:05:50,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 520. [2022-01-31 18:05:50,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 514 states have (on average 1.0058365758754864) internal successors, (517), 514 states have internal predecessors, (517), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:05:50,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 522 transitions. [2022-01-31 18:05:50,618 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 522 transitions. Word has length 511 [2022-01-31 18:05:50,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:05:50,618 INFO L470 AbstractCegarLoop]: Abstraction has 520 states and 522 transitions. [2022-01-31 18:05:50,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 2.0390625) internal successors, (261), 127 states have internal predecessors, (261), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:05:50,618 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 522 transitions. [2022-01-31 18:05:50,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 516 [2022-01-31 18:05:50,620 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:05:50,620 INFO L514 BasicCegarLoop]: trace histogram [125, 125, 125, 125, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:05:50,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2022-01-31 18:05:50,621 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:05:50,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:05:50,621 INFO L85 PathProgramCache]: Analyzing trace with hash -913997889, now seen corresponding path program 125 times [2022-01-31 18:05:50,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:05:50,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1518207973] [2022-01-31 18:05:50,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:05:50,622 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:05:50,622 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:05:50,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:05:50,638 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:05:50,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:05:55,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:05:55,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:05:55,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:05:55,677 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:05:55,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1518207973] [2022-01-31 18:05:55,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1518207973] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:05:55,677 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:05:55,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [129] imperfect sequences [] total 129 [2022-01-31 18:05:55,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519264661] [2022-01-31 18:05:55,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:05:55,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2022-01-31 18:05:55,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:05:55,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2022-01-31 18:05:55,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8130, Invalid=8382, Unknown=0, NotChecked=0, Total=16512 [2022-01-31 18:05:55,681 INFO L87 Difference]: Start difference. First operand 520 states and 522 transitions. Second operand has 129 states, 129 states have (on average 2.0387596899224807) internal successors, (263), 128 states have internal predecessors, (263), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:06:03,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:06:03,346 INFO L93 Difference]: Finished difference Result 789 states and 794 transitions. [2022-01-31 18:06:03,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-01-31 18:06:03,346 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 2.0387596899224807) internal successors, (263), 128 states have internal predecessors, (263), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 515 [2022-01-31 18:06:03,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:06:03,347 INFO L225 Difference]: With dead ends: 789 [2022-01-31 18:06:03,347 INFO L226 Difference]: Without dead ends: 526 [2022-01-31 18:06:03,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8000 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=24384, Invalid=40386, Unknown=0, NotChecked=0, Total=64770 [2022-01-31 18:06:03,350 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 860 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 725 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 861 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 1313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 725 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:06:03,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [861 Valid, 51 Invalid, 1313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [725 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:06:03,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2022-01-31 18:06:03,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 524. [2022-01-31 18:06:03,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 518 states have (on average 1.005791505791506) internal successors, (521), 518 states have internal predecessors, (521), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:06:03,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 526 transitions. [2022-01-31 18:06:03,573 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 526 transitions. Word has length 515 [2022-01-31 18:06:03,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:06:03,573 INFO L470 AbstractCegarLoop]: Abstraction has 524 states and 526 transitions. [2022-01-31 18:06:03,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 2.0387596899224807) internal successors, (263), 128 states have internal predecessors, (263), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:06:03,573 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 526 transitions. [2022-01-31 18:06:03,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 520 [2022-01-31 18:06:03,575 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:06:03,575 INFO L514 BasicCegarLoop]: trace histogram [126, 126, 126, 126, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:06:03,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2022-01-31 18:06:03,576 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:06:03,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:06:03,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1023624645, now seen corresponding path program 126 times [2022-01-31 18:06:03,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:06:03,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [29606527] [2022-01-31 18:06:03,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:06:03,578 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:06:03,578 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:06:03,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:06:03,594 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:06:03,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:06:08,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:06:08,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:06:08,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:06:08,819 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:06:08,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [29606527] [2022-01-31 18:06:08,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [29606527] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:06:08,819 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:06:08,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [130] imperfect sequences [] total 130 [2022-01-31 18:06:08,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978957610] [2022-01-31 18:06:08,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:06:08,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-01-31 18:06:08,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:06:08,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-01-31 18:06:08,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8258, Invalid=8512, Unknown=0, NotChecked=0, Total=16770 [2022-01-31 18:06:08,823 INFO L87 Difference]: Start difference. First operand 524 states and 526 transitions. Second operand has 130 states, 130 states have (on average 2.0384615384615383) internal successors, (265), 129 states have internal predecessors, (265), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:06:16,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:06:16,718 INFO L93 Difference]: Finished difference Result 795 states and 800 transitions. [2022-01-31 18:06:16,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-01-31 18:06:16,719 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 130 states have (on average 2.0384615384615383) internal successors, (265), 129 states have internal predecessors, (265), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 519 [2022-01-31 18:06:16,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:06:16,720 INFO L225 Difference]: With dead ends: 795 [2022-01-31 18:06:16,720 INFO L226 Difference]: Without dead ends: 530 [2022-01-31 18:06:16,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8127 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=24768, Invalid=41024, Unknown=0, NotChecked=0, Total=65792 [2022-01-31 18:06:16,723 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 932 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 797 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 933 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 1350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 797 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:06:16,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [933 Valid, 36 Invalid, 1350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [797 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:06:16,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2022-01-31 18:06:16,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 528. [2022-01-31 18:06:16,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 522 states have (on average 1.0057471264367817) internal successors, (525), 522 states have internal predecessors, (525), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:06:16,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 530 transitions. [2022-01-31 18:06:16,946 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 530 transitions. Word has length 519 [2022-01-31 18:06:16,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:06:16,946 INFO L470 AbstractCegarLoop]: Abstraction has 528 states and 530 transitions. [2022-01-31 18:06:16,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 2.0384615384615383) internal successors, (265), 129 states have internal predecessors, (265), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:06:16,947 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 530 transitions. [2022-01-31 18:06:16,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 524 [2022-01-31 18:06:16,948 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:06:16,949 INFO L514 BasicCegarLoop]: trace histogram [127, 127, 127, 127, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:06:16,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2022-01-31 18:06:16,949 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:06:16,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:06:16,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1432926537, now seen corresponding path program 127 times [2022-01-31 18:06:16,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:06:16,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1639633428] [2022-01-31 18:06:16,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:06:16,950 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:06:16,950 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:06:16,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:06:16,966 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:06:17,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:06:22,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:06:22,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:06:22,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:06:22,170 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:06:22,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1639633428] [2022-01-31 18:06:22,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1639633428] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:06:22,170 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:06:22,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [131] imperfect sequences [] total 131 [2022-01-31 18:06:22,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200754464] [2022-01-31 18:06:22,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:06:22,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2022-01-31 18:06:22,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:06:22,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2022-01-31 18:06:22,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8387, Invalid=8643, Unknown=0, NotChecked=0, Total=17030 [2022-01-31 18:06:22,174 INFO L87 Difference]: Start difference. First operand 528 states and 530 transitions. Second operand has 131 states, 131 states have (on average 2.0381679389312977) internal successors, (267), 130 states have internal predecessors, (267), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:06:30,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:06:30,116 INFO L93 Difference]: Finished difference Result 801 states and 806 transitions. [2022-01-31 18:06:30,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-01-31 18:06:30,117 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 2.0381679389312977) internal successors, (267), 130 states have internal predecessors, (267), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 523 [2022-01-31 18:06:30,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:06:30,118 INFO L225 Difference]: With dead ends: 801 [2022-01-31 18:06:30,118 INFO L226 Difference]: Without dead ends: 534 [2022-01-31 18:06:30,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8255 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=25155, Invalid=41667, Unknown=0, NotChecked=0, Total=66822 [2022-01-31 18:06:30,121 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 945 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 809 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 946 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 1379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 809 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:06:30,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [946 Valid, 41 Invalid, 1379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [809 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:06:30,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2022-01-31 18:06:30,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 532. [2022-01-31 18:06:30,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 526 states have (on average 1.005703422053232) internal successors, (529), 526 states have internal predecessors, (529), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:06:30,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 534 transitions. [2022-01-31 18:06:30,343 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 534 transitions. Word has length 523 [2022-01-31 18:06:30,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:06:30,344 INFO L470 AbstractCegarLoop]: Abstraction has 532 states and 534 transitions. [2022-01-31 18:06:30,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 2.0381679389312977) internal successors, (267), 130 states have internal predecessors, (267), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:06:30,344 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 534 transitions. [2022-01-31 18:06:30,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2022-01-31 18:06:30,346 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:06:30,346 INFO L514 BasicCegarLoop]: trace histogram [128, 128, 128, 128, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:06:30,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2022-01-31 18:06:30,346 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:06:30,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:06:30,346 INFO L85 PathProgramCache]: Analyzing trace with hash -824171213, now seen corresponding path program 128 times [2022-01-31 18:06:30,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:06:30,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [585848521] [2022-01-31 18:06:30,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:06:30,348 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:06:30,348 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:06:30,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:06:30,364 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:06:30,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:06:35,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:06:35,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:06:35,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:06:35,661 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:06:35,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [585848521] [2022-01-31 18:06:35,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [585848521] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:06:35,662 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:06:35,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [132] imperfect sequences [] total 132 [2022-01-31 18:06:35,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244435584] [2022-01-31 18:06:35,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:06:35,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2022-01-31 18:06:35,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:06:35,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2022-01-31 18:06:35,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8517, Invalid=8775, Unknown=0, NotChecked=0, Total=17292 [2022-01-31 18:06:35,665 INFO L87 Difference]: Start difference. First operand 532 states and 534 transitions. Second operand has 132 states, 132 states have (on average 2.037878787878788) internal successors, (269), 131 states have internal predecessors, (269), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:06:43,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:06:43,703 INFO L93 Difference]: Finished difference Result 807 states and 812 transitions. [2022-01-31 18:06:43,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-01-31 18:06:43,703 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 2.037878787878788) internal successors, (269), 131 states have internal predecessors, (269), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 527 [2022-01-31 18:06:43,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:06:43,704 INFO L225 Difference]: With dead ends: 807 [2022-01-31 18:06:43,704 INFO L226 Difference]: Without dead ends: 538 [2022-01-31 18:06:43,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 259 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8384 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=25545, Invalid=42315, Unknown=0, NotChecked=0, Total=67860 [2022-01-31 18:06:43,706 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 881 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 742 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 882 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 742 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:06:43,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [882 Valid, 46 Invalid, 1329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [742 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:06:43,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2022-01-31 18:06:43,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 536. [2022-01-31 18:06:43,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 530 states have (on average 1.0056603773584907) internal successors, (533), 530 states have internal predecessors, (533), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:06:43,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 538 transitions. [2022-01-31 18:06:43,933 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 538 transitions. Word has length 527 [2022-01-31 18:06:43,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:06:43,933 INFO L470 AbstractCegarLoop]: Abstraction has 536 states and 538 transitions. [2022-01-31 18:06:43,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 132 states have (on average 2.037878787878788) internal successors, (269), 131 states have internal predecessors, (269), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:06:43,934 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 538 transitions. [2022-01-31 18:06:43,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2022-01-31 18:06:43,936 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:06:43,936 INFO L514 BasicCegarLoop]: trace histogram [129, 129, 129, 129, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:06:43,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2022-01-31 18:06:43,936 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:06:43,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:06:43,936 INFO L85 PathProgramCache]: Analyzing trace with hash 803362223, now seen corresponding path program 129 times [2022-01-31 18:06:43,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:06:43,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [462296168] [2022-01-31 18:06:43,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:06:43,938 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:06:43,938 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:06:43,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:06:43,959 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:06:44,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:06:49,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:06:49,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:06:49,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:06:49,325 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:06:49,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [462296168] [2022-01-31 18:06:49,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [462296168] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:06:49,325 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:06:49,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [133] imperfect sequences [] total 133 [2022-01-31 18:06:49,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356628222] [2022-01-31 18:06:49,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:06:49,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2022-01-31 18:06:49,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:06:49,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2022-01-31 18:06:49,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8648, Invalid=8908, Unknown=0, NotChecked=0, Total=17556 [2022-01-31 18:06:49,328 INFO L87 Difference]: Start difference. First operand 536 states and 538 transitions. Second operand has 133 states, 133 states have (on average 2.037593984962406) internal successors, (271), 132 states have internal predecessors, (271), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:06:57,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:06:57,595 INFO L93 Difference]: Finished difference Result 813 states and 818 transitions. [2022-01-31 18:06:57,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-01-31 18:06:57,596 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 133 states have (on average 2.037593984962406) internal successors, (271), 132 states have internal predecessors, (271), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 531 [2022-01-31 18:06:57,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:06:57,597 INFO L225 Difference]: With dead ends: 813 [2022-01-31 18:06:57,597 INFO L226 Difference]: Without dead ends: 542 [2022-01-31 18:06:57,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 261 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8514 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=25938, Invalid=42968, Unknown=0, NotChecked=0, Total=68906 [2022-01-31 18:06:57,599 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 955 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 815 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 956 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 815 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:06:57,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [956 Valid, 46 Invalid, 1406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [815 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 18:06:57,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2022-01-31 18:06:57,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 540. [2022-01-31 18:06:57,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 534 states have (on average 1.0056179775280898) internal successors, (537), 534 states have internal predecessors, (537), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:06:57,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 542 transitions. [2022-01-31 18:06:57,830 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 542 transitions. Word has length 531 [2022-01-31 18:06:57,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:06:57,830 INFO L470 AbstractCegarLoop]: Abstraction has 540 states and 542 transitions. [2022-01-31 18:06:57,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 133 states, 133 states have (on average 2.037593984962406) internal successors, (271), 132 states have internal predecessors, (271), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:06:57,831 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 542 transitions. [2022-01-31 18:06:57,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 536 [2022-01-31 18:06:57,832 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:06:57,833 INFO L514 BasicCegarLoop]: trace histogram [130, 130, 130, 130, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:06:57,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2022-01-31 18:06:57,833 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:06:57,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:06:57,833 INFO L85 PathProgramCache]: Analyzing trace with hash -14100437, now seen corresponding path program 130 times [2022-01-31 18:06:57,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:06:57,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1060377587] [2022-01-31 18:06:57,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:06:57,834 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:06:57,834 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:06:57,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:06:57,851 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:06:57,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:07:03,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:07:03,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:07:03,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:07:03,335 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:07:03,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1060377587] [2022-01-31 18:07:03,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1060377587] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:07:03,335 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:07:03,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [134] imperfect sequences [] total 134 [2022-01-31 18:07:03,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736277666] [2022-01-31 18:07:03,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:07:03,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2022-01-31 18:07:03,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:07:03,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2022-01-31 18:07:03,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8780, Invalid=9042, Unknown=0, NotChecked=0, Total=17822 [2022-01-31 18:07:03,339 INFO L87 Difference]: Start difference. First operand 540 states and 542 transitions. Second operand has 134 states, 134 states have (on average 2.037313432835821) internal successors, (273), 133 states have internal predecessors, (273), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:07:11,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:07:11,775 INFO L93 Difference]: Finished difference Result 819 states and 824 transitions. [2022-01-31 18:07:11,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2022-01-31 18:07:11,776 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 2.037313432835821) internal successors, (273), 133 states have internal predecessors, (273), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 535 [2022-01-31 18:07:11,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:07:11,777 INFO L225 Difference]: With dead ends: 819 [2022-01-31 18:07:11,777 INFO L226 Difference]: Without dead ends: 546 [2022-01-31 18:07:11,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8645 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=26334, Invalid=43626, Unknown=0, NotChecked=0, Total=69960 [2022-01-31 18:07:11,779 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 976 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 836 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 977 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 1457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 836 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:07:11,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [977 Valid, 56 Invalid, 1457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [836 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 18:07:11,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2022-01-31 18:07:11,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 544. [2022-01-31 18:07:11,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 538 states have (on average 1.0055762081784387) internal successors, (541), 538 states have internal predecessors, (541), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:07:11,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 546 transitions. [2022-01-31 18:07:11,993 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 546 transitions. Word has length 535 [2022-01-31 18:07:11,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:07:11,993 INFO L470 AbstractCegarLoop]: Abstraction has 544 states and 546 transitions. [2022-01-31 18:07:11,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 2.037313432835821) internal successors, (273), 133 states have internal predecessors, (273), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:07:11,994 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 546 transitions. [2022-01-31 18:07:11,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 540 [2022-01-31 18:07:11,995 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:07:11,996 INFO L514 BasicCegarLoop]: trace histogram [131, 131, 131, 131, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:07:11,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2022-01-31 18:07:11,996 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:07:11,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:07:11,996 INFO L85 PathProgramCache]: Analyzing trace with hash 532589735, now seen corresponding path program 131 times [2022-01-31 18:07:11,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:07:11,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [156205772] [2022-01-31 18:07:11,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:07:11,997 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:07:11,997 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:07:11,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:07:12,014 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:07:12,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:07:17,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:07:17,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:07:17,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:07:17,624 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:07:17,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [156205772] [2022-01-31 18:07:17,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [156205772] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:07:17,624 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:07:17,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [135] imperfect sequences [] total 135 [2022-01-31 18:07:17,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284184883] [2022-01-31 18:07:17,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:07:17,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2022-01-31 18:07:17,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:07:17,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2022-01-31 18:07:17,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8913, Invalid=9177, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 18:07:17,629 INFO L87 Difference]: Start difference. First operand 544 states and 546 transitions. Second operand has 135 states, 135 states have (on average 2.037037037037037) internal successors, (275), 134 states have internal predecessors, (275), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:07:26,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:07:26,088 INFO L93 Difference]: Finished difference Result 825 states and 830 transitions. [2022-01-31 18:07:26,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2022-01-31 18:07:26,089 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 2.037037037037037) internal successors, (275), 134 states have internal predecessors, (275), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 539 [2022-01-31 18:07:26,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:07:26,090 INFO L225 Difference]: With dead ends: 825 [2022-01-31 18:07:26,090 INFO L226 Difference]: Without dead ends: 550 [2022-01-31 18:07:26,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 265 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8777 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=26733, Invalid=44289, Unknown=0, NotChecked=0, Total=71022 [2022-01-31 18:07:26,092 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 1011 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 870 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1012 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 1443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 870 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:07:26,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1012 Valid, 36 Invalid, 1443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [870 Valid, 573 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 18:07:26,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2022-01-31 18:07:26,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 548. [2022-01-31 18:07:26,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 542 states have (on average 1.0055350553505535) internal successors, (545), 542 states have internal predecessors, (545), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:07:26,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 550 transitions. [2022-01-31 18:07:26,329 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 550 transitions. Word has length 539 [2022-01-31 18:07:26,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:07:26,330 INFO L470 AbstractCegarLoop]: Abstraction has 548 states and 550 transitions. [2022-01-31 18:07:26,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 2.037037037037037) internal successors, (275), 134 states have internal predecessors, (275), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:07:26,330 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 550 transitions. [2022-01-31 18:07:26,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 544 [2022-01-31 18:07:26,332 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:07:26,332 INFO L514 BasicCegarLoop]: trace histogram [132, 132, 132, 132, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:07:26,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2022-01-31 18:07:26,332 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:07:26,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:07:26,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1506880733, now seen corresponding path program 132 times [2022-01-31 18:07:26,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:07:26,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2124356320] [2022-01-31 18:07:26,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:07:26,333 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:07:26,333 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:07:26,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:07:26,350 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:07:26,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat