/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/array-lopstr16/sum_multi_array.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 20:05:03,171 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 20:05:03,172 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 20:05:03,214 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 20:05:03,220 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 20:05:03,221 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 20:05:03,221 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 20:05:03,222 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 20:05:03,222 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 20:05:03,223 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 20:05:03,224 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 20:05:03,235 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 20:05:03,236 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 20:05:03,237 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 20:05:03,237 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 20:05:03,238 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 20:05:03,240 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 20:05:03,244 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 20:05:03,244 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 20:05:03,245 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 20:05:03,264 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-01-31 20:05:03,270 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 20:05:03,270 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 20:05:03,271 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 20:05:03,271 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 20:05:03,271 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 20:05:03,271 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 20:05:03,271 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 20:05:03,271 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 20:05:03,271 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 20:05:03,271 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 20:05:03,271 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 20:05:03,272 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 20:05:03,272 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 20:05:03,272 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 20:05:03,272 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 20:05:03,272 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 20:05:03,272 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 20:05:03,272 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 20:05:03,272 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 20:05:03,272 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 20:05:03,272 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 20:05:03,272 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 20:05:03,273 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 20:05:03,273 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 20:05:03,445 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 20:05:03,465 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 20:05:03,467 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 20:05:03,467 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 20:05:03,468 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 20:05:03,468 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-lopstr16/sum_multi_array.i [2022-01-31 20:05:03,514 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49b4c44c9/22b259680fe24a2d9c71462af86845d5/FLAGaa59c435d [2022-01-31 20:05:03,856 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 20:05:03,856 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-lopstr16/sum_multi_array.i [2022-01-31 20:05:03,860 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49b4c44c9/22b259680fe24a2d9c71462af86845d5/FLAGaa59c435d [2022-01-31 20:05:03,867 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49b4c44c9/22b259680fe24a2d9c71462af86845d5 [2022-01-31 20:05:03,869 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 20:05:03,870 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 20:05:03,871 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 20:05:03,871 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 20:05:03,873 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 20:05:03,873 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:05:03" (1/1) ... [2022-01-31 20:05:03,874 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c7c6d63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:05:03, skipping insertion in model container [2022-01-31 20:05:03,874 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:05:03" (1/1) ... [2022-01-31 20:05:03,879 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 20:05:03,888 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 20:05:03,989 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-lopstr16/sum_multi_array.i[808,821] [2022-01-31 20:05:04,002 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 20:05:14,301 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 20:05:14,310 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-lopstr16/sum_multi_array.i[808,821] [2022-01-31 20:05:14,334 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 20:05:14,344 INFO L208 MainTranslator]: Completed translation [2022-01-31 20:05:14,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:05:14 WrapperNode [2022-01-31 20:05:14,344 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 20:05:14,345 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 20:05:14,345 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 20:05:14,345 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 20:05:14,389 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:05:14" (1/1) ... [2022-01-31 20:05:14,389 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:05:14" (1/1) ... [2022-01-31 20:05:14,410 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:05:14" (1/1) ... [2022-01-31 20:05:14,410 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:05:14" (1/1) ... [2022-01-31 20:05:14,423 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:05:14" (1/1) ... [2022-01-31 20:05:14,432 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:05:14" (1/1) ... [2022-01-31 20:05:14,435 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:05:14" (1/1) ... [2022-01-31 20:05:14,437 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 20:05:14,451 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 20:05:14,451 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 20:05:14,451 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 20:05:14,452 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:05:14" (1/1) ... [2022-01-31 20:05:14,457 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 20:05:14,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 20:05:14,510 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-31 20:05:14,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-31 20:05:14,612 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 20:05:14,612 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 20:05:14,612 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 20:05:14,612 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 20:05:14,612 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 20:05:14,612 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 20:05:14,612 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 20:05:14,613 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 20:05:14,613 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 20:05:14,613 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 20:05:14,613 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 20:05:14,614 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 20:05:14,614 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 20:05:14,614 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 20:05:14,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 20:05:14,615 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 20:05:14,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 20:05:14,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 20:05:14,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 20:05:14,616 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 20:05:14,710 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 20:05:14,711 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 20:05:14,871 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 20:05:14,875 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 20:05:14,875 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-31 20:05:14,876 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:05:14 BoogieIcfgContainer [2022-01-31 20:05:14,876 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 20:05:14,877 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 20:05:14,877 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 20:05:14,881 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 20:05:14,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 08:05:03" (1/3) ... [2022-01-31 20:05:14,881 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14b8a54f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:05:14, skipping insertion in model container [2022-01-31 20:05:14,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:05:14" (2/3) ... [2022-01-31 20:05:14,882 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14b8a54f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:05:14, skipping insertion in model container [2022-01-31 20:05:14,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:05:14" (3/3) ... [2022-01-31 20:05:14,882 INFO L111 eAbstractionObserver]: Analyzing ICFG sum_multi_array.i [2022-01-31 20:05:14,893 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 20:05:14,894 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 20:05:14,972 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 20:05:14,985 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=JORDAN [2022-01-31 20:05:14,986 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 20:05:15,006 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 20:05:15,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-31 20:05:15,011 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:05:15,011 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:05:15,012 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:05:15,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:05:15,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1013160769, now seen corresponding path program 1 times [2022-01-31 20:05:15,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:05:15,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1917584920] [2022-01-31 20:05:15,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:05:15,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:05:15,116 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:05:15,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:15,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:05:15,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:15,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:05:15,372 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:05:15,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1917584920] [2022-01-31 20:05:15,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1917584920] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:05:15,373 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:05:15,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 20:05:15,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530842163] [2022-01-31 20:05:15,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:05:15,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 20:05:15,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:05:15,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 20:05:15,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 20:05:15,436 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 20:05:15,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:05:15,522 INFO L93 Difference]: Finished difference Result 57 states and 76 transitions. [2022-01-31 20:05:15,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 20:05:15,528 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 20:05:15,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:05:15,533 INFO L225 Difference]: With dead ends: 57 [2022-01-31 20:05:15,533 INFO L226 Difference]: Without dead ends: 30 [2022-01-31 20:05:15,551 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 20:05:15,554 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 16 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:05:15,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 28 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:05:15,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-01-31 20:05:15,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 22. [2022-01-31 20:05:15,601 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 20:05:15,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2022-01-31 20:05:15,603 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 15 [2022-01-31 20:05:15,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:05:15,603 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2022-01-31 20:05:15,603 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 20:05:15,604 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2022-01-31 20:05:15,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-31 20:05:15,612 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:05:15,613 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:05:15,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 20:05:15,613 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:05:15,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:05:15,615 INFO L85 PathProgramCache]: Analyzing trace with hash 211576627, now seen corresponding path program 1 times [2022-01-31 20:05:15,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:05:15,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [135688783] [2022-01-31 20:05:15,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:05:15,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:05:15,621 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:05:15,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:15,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:05:15,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:15,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:05:15,804 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:05:15,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [135688783] [2022-01-31 20:05:15,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [135688783] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:05:15,804 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:05:15,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 20:05:15,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239237413] [2022-01-31 20:05:15,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:05:15,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 20:05:15,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:05:15,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 20:05:15,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 20:05:15,809 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:05:15,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:05:15,960 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2022-01-31 20:05:15,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 20:05:15,961 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-01-31 20:05:15,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:05:15,975 INFO L225 Difference]: With dead ends: 44 [2022-01-31 20:05:15,975 INFO L226 Difference]: Without dead ends: 30 [2022-01-31 20:05:15,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-31 20:05:15,977 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 25 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:05:15,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 21 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:05:15,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-01-31 20:05:15,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2022-01-31 20:05:15,991 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 20:05:15,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2022-01-31 20:05:15,992 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 15 [2022-01-31 20:05:15,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:05:15,992 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2022-01-31 20:05:15,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:05:15,993 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2022-01-31 20:05:15,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-31 20:05:15,993 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:05:15,994 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 20:05:15,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 20:05:15,994 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:05:15,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:05:15,997 INFO L85 PathProgramCache]: Analyzing trace with hash 775264175, now seen corresponding path program 1 times [2022-01-31 20:05:15,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:05:16,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1935140818] [2022-01-31 20:05:16,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:05:16,035 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:05:16,035 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:05:16,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:05:16,037 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:05:16,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:16,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:05:16,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:16,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:05:16,214 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:05:16,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1935140818] [2022-01-31 20:05:16,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1935140818] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:05:16,215 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:05:16,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 20:05:16,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514085174] [2022-01-31 20:05:16,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:05:16,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 20:05:16,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:05:16,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 20:05:16,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 20:05:16,217 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:05:16,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:05:16,370 INFO L93 Difference]: Finished difference Result 53 states and 60 transitions. [2022-01-31 20:05:16,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 20:05:16,370 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-01-31 20:05:16,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:05:16,371 INFO L225 Difference]: With dead ends: 53 [2022-01-31 20:05:16,371 INFO L226 Difference]: Without dead ends: 38 [2022-01-31 20:05:16,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 20:05:16,372 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 41 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:05:16,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 21 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:05:16,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-01-31 20:05:16,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2022-01-31 20:05:16,377 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 20:05:16,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2022-01-31 20:05:16,378 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 19 [2022-01-31 20:05:16,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:05:16,378 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2022-01-31 20:05:16,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:05:16,378 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2022-01-31 20:05:16,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-31 20:05:16,378 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:05:16,378 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 20:05:16,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 20:05:16,379 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:05:16,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:05:16,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1735189973, now seen corresponding path program 2 times [2022-01-31 20:05:16,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:05:16,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1613453398] [2022-01-31 20:05:16,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:05:16,382 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:05:16,382 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:05:16,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:05:16,384 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:05:16,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:16,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:05:16,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:16,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:05:16,478 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:05:16,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1613453398] [2022-01-31 20:05:16,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1613453398] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:05:16,479 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:05:16,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 20:05:16,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933642410] [2022-01-31 20:05:16,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:05:16,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 20:05:16,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:05:16,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 20:05:16,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 20:05:16,480 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 20:05:16,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:05:16,659 INFO L93 Difference]: Finished difference Result 63 states and 71 transitions. [2022-01-31 20:05:16,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 20:05:16,661 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 20:05:16,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:05:16,661 INFO L225 Difference]: With dead ends: 63 [2022-01-31 20:05:16,661 INFO L226 Difference]: Without dead ends: 46 [2022-01-31 20:05:16,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-31 20:05:16,662 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 20 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 35 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 20:05:16,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 35 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:05:16,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-01-31 20:05:16,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 32. [2022-01-31 20:05:16,668 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 20:05:16,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2022-01-31 20:05:16,669 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 23 [2022-01-31 20:05:16,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:05:16,669 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2022-01-31 20:05:16,669 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 20:05:16,669 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2022-01-31 20:05:16,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-31 20:05:16,670 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:05:16,670 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 20:05:16,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 20:05:16,670 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:05:16,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:05:16,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1858072231, now seen corresponding path program 3 times [2022-01-31 20:05:16,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:05:16,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [186714107] [2022-01-31 20:05:16,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:05:16,692 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:05:16,692 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:05:16,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:05:16,694 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:05:16,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:16,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:05:16,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:16,779 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 20:05:16,779 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:05:16,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [186714107] [2022-01-31 20:05:16,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [186714107] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:05:16,780 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:05:16,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 20:05:16,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237891949] [2022-01-31 20:05:16,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:05:16,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 20:05:16,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:05:16,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 20:05:16,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-31 20:05:16,782 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 20:05:16,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:05:16,890 INFO L93 Difference]: Finished difference Result 73 states and 82 transitions. [2022-01-31 20:05:16,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 20:05:16,890 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 20:05:16,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:05:16,896 INFO L225 Difference]: With dead ends: 73 [2022-01-31 20:05:16,896 INFO L226 Difference]: Without dead ends: 54 [2022-01-31 20:05:16,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-01-31 20:05:16,899 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 27 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:05:16,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 37 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:05:16,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-01-31 20:05:16,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 36. [2022-01-31 20:05:16,914 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 20:05:16,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2022-01-31 20:05:16,915 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 27 [2022-01-31 20:05:16,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:05:16,915 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2022-01-31 20:05:16,915 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 20:05:16,915 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2022-01-31 20:05:16,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-31 20:05:16,916 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:05:16,916 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 20:05:16,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 20:05:16,916 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:05:16,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:05:16,916 INFO L85 PathProgramCache]: Analyzing trace with hash 88544547, now seen corresponding path program 4 times [2022-01-31 20:05:16,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:05:16,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1740734825] [2022-01-31 20:05:16,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:05:16,918 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:05:16,919 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:05:16,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:05:16,919 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:05:16,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:17,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:05:17,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:17,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:05:17,040 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:05:17,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1740734825] [2022-01-31 20:05:17,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1740734825] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:05:17,040 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:05:17,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 20:05:17,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187658341] [2022-01-31 20:05:17,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:05:17,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 20:05:17,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:05:17,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 20:05:17,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 20:05:17,041 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 20:05:17,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:05:17,213 INFO L93 Difference]: Finished difference Result 83 states and 93 transitions. [2022-01-31 20:05:17,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 20:05:17,214 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 20:05:17,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:05:17,214 INFO L225 Difference]: With dead ends: 83 [2022-01-31 20:05:17,214 INFO L226 Difference]: Without dead ends: 62 [2022-01-31 20:05:17,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-01-31 20:05:17,215 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 37 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:05:17,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 34 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:05:17,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-01-31 20:05:17,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 40. [2022-01-31 20:05:17,235 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 20:05:17,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2022-01-31 20:05:17,236 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 31 [2022-01-31 20:05:17,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:05:17,236 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2022-01-31 20:05:17,236 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 20:05:17,236 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2022-01-31 20:05:17,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-31 20:05:17,237 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:05:17,237 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 20:05:17,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 20:05:17,237 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:05:17,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:05:17,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1647545759, now seen corresponding path program 5 times [2022-01-31 20:05:17,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:05:17,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [875237268] [2022-01-31 20:05:17,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:05:17,239 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:05:17,239 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:05:17,239 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:05:17,240 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:05:17,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:17,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:05:17,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:17,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:05:17,338 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:05:17,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [875237268] [2022-01-31 20:05:17,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [875237268] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:05:17,338 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:05:17,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 20:05:17,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322294776] [2022-01-31 20:05:17,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:05:17,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 20:05:17,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:05:17,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 20:05:17,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-31 20:05:17,339 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 20:05:17,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:05:17,455 INFO L93 Difference]: Finished difference Result 93 states and 104 transitions. [2022-01-31 20:05:17,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 20:05:17,455 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 20:05:17,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:05:17,456 INFO L225 Difference]: With dead ends: 93 [2022-01-31 20:05:17,456 INFO L226 Difference]: Without dead ends: 70 [2022-01-31 20:05:17,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2022-01-31 20:05:17,457 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 41 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:05:17,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 41 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:05:17,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-01-31 20:05:17,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 44. [2022-01-31 20:05:17,464 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 20:05:17,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2022-01-31 20:05:17,464 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 35 [2022-01-31 20:05:17,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:05:17,464 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2022-01-31 20:05:17,464 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 20:05:17,464 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2022-01-31 20:05:17,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-31 20:05:17,465 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:05:17,465 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 20:05:17,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 20:05:17,465 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:05:17,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:05:17,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1123002341, now seen corresponding path program 6 times [2022-01-31 20:05:17,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:05:17,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [629822091] [2022-01-31 20:05:17,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:05:17,467 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:05:17,467 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:05:17,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:05:17,468 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:05:17,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:17,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:05:17,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:17,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:05:17,628 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:05:17,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [629822091] [2022-01-31 20:05:17,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [629822091] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:05:17,628 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:05:17,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 20:05:17,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607507336] [2022-01-31 20:05:17,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:05:17,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 20:05:17,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:05:17,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 20:05:17,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2022-01-31 20:05:17,629 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 11 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:05:17,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:05:17,784 INFO L93 Difference]: Finished difference Result 103 states and 115 transitions. [2022-01-31 20:05:17,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 20:05:17,784 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-01-31 20:05:17,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:05:17,785 INFO L225 Difference]: With dead ends: 103 [2022-01-31 20:05:17,785 INFO L226 Difference]: Without dead ends: 78 [2022-01-31 20:05:17,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2022-01-31 20:05:17,785 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 57 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:05:17,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 33 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:05:17,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-01-31 20:05:17,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 48. [2022-01-31 20:05:17,793 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 20:05:17,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2022-01-31 20:05:17,794 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 39 [2022-01-31 20:05:17,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:05:17,794 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2022-01-31 20:05:17,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:05:17,794 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2022-01-31 20:05:17,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-31 20:05:17,795 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:05:17,795 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 20:05:17,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 20:05:17,795 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:05:17,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:05:17,795 INFO L85 PathProgramCache]: Analyzing trace with hash -18320233, now seen corresponding path program 7 times [2022-01-31 20:05:17,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:05:17,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [741361479] [2022-01-31 20:05:17,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:05:17,797 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:05:17,797 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:05:17,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:05:17,798 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:05:17,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:17,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:05:17,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:17,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:05:17,873 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:05:17,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [741361479] [2022-01-31 20:05:17,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [741361479] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:05:17,873 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:05:17,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 20:05:17,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568789577] [2022-01-31 20:05:17,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:05:17,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 20:05:17,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:05:17,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 20:05:17,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2022-01-31 20:05:17,874 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 20:05:18,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:05:18,088 INFO L93 Difference]: Finished difference Result 113 states and 126 transitions. [2022-01-31 20:05:18,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 20:05:18,089 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 20:05:18,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:05:18,090 INFO L225 Difference]: With dead ends: 113 [2022-01-31 20:05:18,090 INFO L226 Difference]: Without dead ends: 86 [2022-01-31 20:05:18,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=58, Invalid=74, Unknown=0, NotChecked=0, Total=132 [2022-01-31 20:05:18,090 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 58 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:05:18,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 50 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 20:05:18,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-01-31 20:05:18,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 52. [2022-01-31 20:05:18,100 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 20:05:18,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2022-01-31 20:05:18,102 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 43 [2022-01-31 20:05:18,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:05:18,102 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2022-01-31 20:05:18,102 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 20:05:18,102 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2022-01-31 20:05:18,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-31 20:05:18,120 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:05:18,120 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 20:05:18,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 20:05:18,121 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:05:18,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:05:18,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1111941907, now seen corresponding path program 8 times [2022-01-31 20:05:18,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:05:18,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1871077440] [2022-01-31 20:05:18,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:05:18,124 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:05:18,124 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:05:18,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:05:18,126 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:05:18,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:18,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:05:18,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:18,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:05:18,289 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:05:18,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1871077440] [2022-01-31 20:05:18,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1871077440] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:05:18,290 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:05:18,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 20:05:18,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833727931] [2022-01-31 20:05:18,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:05:18,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 20:05:18,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:05:18,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 20:05:18,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-01-31 20:05:18,291 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 20:05:18,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:05:18,538 INFO L93 Difference]: Finished difference Result 123 states and 137 transitions. [2022-01-31 20:05:18,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 20:05:18,539 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 20:05:18,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:05:18,540 INFO L225 Difference]: With dead ends: 123 [2022-01-31 20:05:18,540 INFO L226 Difference]: Without dead ends: 94 [2022-01-31 20:05:18,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=87, Unknown=0, NotChecked=0, Total=156 [2022-01-31 20:05:18,541 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 62 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:05:18,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 57 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 20:05:18,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-01-31 20:05:18,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 56. [2022-01-31 20:05:18,549 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 20:05:18,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2022-01-31 20:05:18,549 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 47 [2022-01-31 20:05:18,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:05:18,550 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2022-01-31 20:05:18,550 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 20:05:18,550 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2022-01-31 20:05:18,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-31 20:05:18,550 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:05:18,550 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 20:05:18,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 20:05:18,551 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:05:18,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:05:18,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1396089743, now seen corresponding path program 9 times [2022-01-31 20:05:18,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:05:18,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1239337658] [2022-01-31 20:05:18,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:05:18,553 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:05:18,553 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:05:18,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:05:18,554 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:05:18,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:18,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:05:18,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:18,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:05:18,824 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:05:18,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1239337658] [2022-01-31 20:05:18,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1239337658] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:05:18,824 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:05:18,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 20:05:18,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146921056] [2022-01-31 20:05:18,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:05:18,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 20:05:18,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:05:18,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 20:05:18,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-01-31 20:05:18,825 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:05:19,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:05:19,037 INFO L93 Difference]: Finished difference Result 133 states and 148 transitions. [2022-01-31 20:05:19,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 20:05:19,037 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-01-31 20:05:19,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:05:19,038 INFO L225 Difference]: With dead ends: 133 [2022-01-31 20:05:19,038 INFO L226 Difference]: Without dead ends: 102 [2022-01-31 20:05:19,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2022-01-31 20:05:19,039 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 96 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:05:19,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 32 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:05:19,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-01-31 20:05:19,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 60. [2022-01-31 20:05:19,048 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 20:05:19,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2022-01-31 20:05:19,048 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 51 [2022-01-31 20:05:19,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:05:19,049 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2022-01-31 20:05:19,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:05:19,049 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2022-01-31 20:05:19,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-31 20:05:19,049 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:05:19,049 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 20:05:19,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 20:05:19,049 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:05:19,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:05:19,050 INFO L85 PathProgramCache]: Analyzing trace with hash 792901131, now seen corresponding path program 10 times [2022-01-31 20:05:19,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:05:19,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [884739445] [2022-01-31 20:05:19,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:05:19,062 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:05:19,062 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:05:19,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:05:19,063 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:05:19,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:19,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:05:19,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:19,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:05:19,296 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:05:19,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [884739445] [2022-01-31 20:05:19,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [884739445] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:05:19,296 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:05:19,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 20:05:19,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557806613] [2022-01-31 20:05:19,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:05:19,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 20:05:19,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:05:19,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 20:05:19,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2022-01-31 20:05:19,297 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:05:19,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:05:19,627 INFO L93 Difference]: Finished difference Result 143 states and 159 transitions. [2022-01-31 20:05:19,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 20:05:19,628 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-01-31 20:05:19,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:05:19,628 INFO L225 Difference]: With dead ends: 143 [2022-01-31 20:05:19,629 INFO L226 Difference]: Without dead ends: 110 [2022-01-31 20:05:19,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=159, Unknown=0, NotChecked=0, Total=272 [2022-01-31 20:05:19,629 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 113 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:05:19,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 36 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:05:19,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-01-31 20:05:19,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 64. [2022-01-31 20:05:19,642 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 20:05:19,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2022-01-31 20:05:19,642 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 55 [2022-01-31 20:05:19,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:05:19,642 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2022-01-31 20:05:19,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:05:19,642 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2022-01-31 20:05:19,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-31 20:05:19,643 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:05:19,663 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 20:05:19,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-31 20:05:19,663 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:05:19,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:05:19,664 INFO L85 PathProgramCache]: Analyzing trace with hash -2055857529, now seen corresponding path program 11 times [2022-01-31 20:05:19,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:05:19,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [464895092] [2022-01-31 20:05:19,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:05:19,665 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:05:19,665 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:05:19,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:05:19,667 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:05:19,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:19,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:05:19,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:19,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:05:19,868 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:05:19,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [464895092] [2022-01-31 20:05:19,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [464895092] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:05:19,868 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:05:19,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 20:05:19,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553841250] [2022-01-31 20:05:19,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:05:19,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 20:05:19,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:05:19,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 20:05:19,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2022-01-31 20:05:19,869 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:05:20,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:05:20,125 INFO L93 Difference]: Finished difference Result 153 states and 170 transitions. [2022-01-31 20:05:20,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 20:05:20,126 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-01-31 20:05:20,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:05:20,127 INFO L225 Difference]: With dead ends: 153 [2022-01-31 20:05:20,127 INFO L226 Difference]: Without dead ends: 118 [2022-01-31 20:05:20,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=178, Unknown=0, NotChecked=0, Total=306 [2022-01-31 20:05:20,127 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 142 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:05:20,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 33 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 20:05:20,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-01-31 20:05:20,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 68. [2022-01-31 20:05:20,138 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 20:05:20,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2022-01-31 20:05:20,138 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 59 [2022-01-31 20:05:20,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:05:20,138 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2022-01-31 20:05:20,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:05:20,138 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2022-01-31 20:05:20,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 20:05:20,151 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:05:20,151 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 20:05:20,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 20:05:20,152 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:05:20,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:05:20,152 INFO L85 PathProgramCache]: Analyzing trace with hash 911986947, now seen corresponding path program 12 times [2022-01-31 20:05:20,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:05:20,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1359263327] [2022-01-31 20:05:20,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:05:20,154 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:05:20,154 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:05:20,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:05:20,155 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:05:20,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:20,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:05:20,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:20,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:05:20,435 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:05:20,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1359263327] [2022-01-31 20:05:20,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1359263327] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:05:20,435 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:05:20,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 20:05:20,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145867013] [2022-01-31 20:05:20,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:05:20,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 20:05:20,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:05:20,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 20:05:20,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2022-01-31 20:05:20,436 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand has 17 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:05:20,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:05:20,701 INFO L93 Difference]: Finished difference Result 163 states and 181 transitions. [2022-01-31 20:05:20,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 20:05:20,701 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2022-01-31 20:05:20,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:05:20,702 INFO L225 Difference]: With dead ends: 163 [2022-01-31 20:05:20,702 INFO L226 Difference]: Without dead ends: 126 [2022-01-31 20:05:20,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=144, Invalid=198, Unknown=0, NotChecked=0, Total=342 [2022-01-31 20:05:20,703 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 168 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:05:20,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 34 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 20:05:20,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-01-31 20:05:20,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 72. [2022-01-31 20:05:20,714 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 20:05:20,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2022-01-31 20:05:20,714 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 63 [2022-01-31 20:05:20,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:05:20,714 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2022-01-31 20:05:20,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:05:20,714 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2022-01-31 20:05:20,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-31 20:05:20,715 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:05:20,715 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 20:05:20,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-31 20:05:20,715 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:05:20,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:05:20,715 INFO L85 PathProgramCache]: Analyzing trace with hash -738272897, now seen corresponding path program 13 times [2022-01-31 20:05:20,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:05:20,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [975600501] [2022-01-31 20:05:20,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:05:20,717 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:05:20,717 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:05:20,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:05:20,719 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:05:20,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:20,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:05:20,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:20,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:05:20,972 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:05:20,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [975600501] [2022-01-31 20:05:20,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [975600501] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:05:20,972 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:05:20,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 20:05:20,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074100476] [2022-01-31 20:05:20,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:05:20,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 20:05:20,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:05:20,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 20:05:20,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2022-01-31 20:05:20,973 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 20:05:21,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:05:21,345 INFO L93 Difference]: Finished difference Result 173 states and 192 transitions. [2022-01-31 20:05:21,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 20:05:21,345 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 20:05:21,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:05:21,346 INFO L225 Difference]: With dead ends: 173 [2022-01-31 20:05:21,346 INFO L226 Difference]: Without dead ends: 134 [2022-01-31 20:05:21,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=139, Invalid=167, Unknown=0, NotChecked=0, Total=306 [2022-01-31 20:05:21,347 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 112 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:05:21,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 62 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:05:21,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-01-31 20:05:21,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 76. [2022-01-31 20:05:21,358 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 20:05:21,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2022-01-31 20:05:21,358 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 67 [2022-01-31 20:05:21,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:05:21,358 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2022-01-31 20:05:21,358 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 20:05:21,358 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2022-01-31 20:05:21,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-31 20:05:21,359 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:05:21,359 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 20:05:21,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-31 20:05:21,359 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:05:21,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:05:21,372 INFO L85 PathProgramCache]: Analyzing trace with hash 568996859, now seen corresponding path program 14 times [2022-01-31 20:05:21,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:05:21,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1923381039] [2022-01-31 20:05:21,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:05:21,376 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:05:21,376 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:05:21,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:05:21,377 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:05:21,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:21,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:05:21,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:21,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:05:21,622 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:05:21,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1923381039] [2022-01-31 20:05:21,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1923381039] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:05:21,622 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:05:21,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 20:05:21,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154134176] [2022-01-31 20:05:21,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:05:21,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 20:05:21,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:05:21,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 20:05:21,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-01-31 20:05:21,623 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 20:05:21,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:05:21,919 INFO L93 Difference]: Finished difference Result 183 states and 203 transitions. [2022-01-31 20:05:21,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 20:05:21,920 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 20:05:21,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:05:21,921 INFO L225 Difference]: With dead ends: 183 [2022-01-31 20:05:21,921 INFO L226 Difference]: Without dead ends: 142 [2022-01-31 20:05:21,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=156, Invalid=186, Unknown=0, NotChecked=0, Total=342 [2022-01-31 20:05:21,922 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 137 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:05:21,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 69 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 20:05:21,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-01-31 20:05:21,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 80. [2022-01-31 20:05:21,941 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 20:05:21,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2022-01-31 20:05:21,953 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 71 [2022-01-31 20:05:21,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:05:21,954 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2022-01-31 20:05:21,954 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 20:05:21,954 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2022-01-31 20:05:21,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-31 20:05:21,958 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:05:21,958 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 20:05:21,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-31 20:05:21,958 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:05:21,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:05:21,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1792483209, now seen corresponding path program 15 times [2022-01-31 20:05:21,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:05:21,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [64501624] [2022-01-31 20:05:21,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:05:21,960 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:05:21,961 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:05:21,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:05:21,962 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:05:22,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:22,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:05:22,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:22,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:05:22,218 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:05:22,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [64501624] [2022-01-31 20:05:22,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [64501624] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:05:22,218 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:05:22,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 20:05:22,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872130333] [2022-01-31 20:05:22,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:05:22,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 20:05:22,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:05:22,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 20:05:22,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2022-01-31 20:05:22,219 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 20:05:22,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:05:22,538 INFO L93 Difference]: Finished difference Result 193 states and 214 transitions. [2022-01-31 20:05:22,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 20:05:22,538 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 20:05:22,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:05:22,539 INFO L225 Difference]: With dead ends: 193 [2022-01-31 20:05:22,539 INFO L226 Difference]: Without dead ends: 150 [2022-01-31 20:05:22,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=174, Invalid=206, Unknown=0, NotChecked=0, Total=380 [2022-01-31 20:05:22,540 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 123 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:05:22,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 76 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 20:05:22,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-01-31 20:05:22,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 84. [2022-01-31 20:05:22,556 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 20:05:22,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2022-01-31 20:05:22,556 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 75 [2022-01-31 20:05:22,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:05:22,557 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2022-01-31 20:05:22,557 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 20:05:22,557 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2022-01-31 20:05:22,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-31 20:05:22,557 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:05:22,557 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 20:05:22,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-31 20:05:22,558 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:05:22,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:05:22,558 INFO L85 PathProgramCache]: Analyzing trace with hash -733618445, now seen corresponding path program 16 times [2022-01-31 20:05:22,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:05:22,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1178549275] [2022-01-31 20:05:22,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:05:22,559 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:05:22,560 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:05:22,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:05:22,561 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:05:22,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:22,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:05:22,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:22,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:05:22,840 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:05:22,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1178549275] [2022-01-31 20:05:22,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1178549275] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:05:22,852 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:05:22,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 20:05:22,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329028085] [2022-01-31 20:05:22,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:05:22,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 20:05:22,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:05:22,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 20:05:22,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2022-01-31 20:05:22,853 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand has 21 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:05:23,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:05:23,207 INFO L93 Difference]: Finished difference Result 203 states and 225 transitions. [2022-01-31 20:05:23,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 20:05:23,207 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 79 [2022-01-31 20:05:23,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:05:23,208 INFO L225 Difference]: With dead ends: 203 [2022-01-31 20:05:23,208 INFO L226 Difference]: Without dead ends: 158 [2022-01-31 20:05:23,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=218, Invalid=288, Unknown=0, NotChecked=0, Total=506 [2022-01-31 20:05:23,209 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 145 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:05:23,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 43 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 20:05:23,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-01-31 20:05:23,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 88. [2022-01-31 20:05:23,222 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 20:05:23,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2022-01-31 20:05:23,222 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 79 [2022-01-31 20:05:23,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:05:23,222 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2022-01-31 20:05:23,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:05:23,222 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2022-01-31 20:05:23,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-31 20:05:23,223 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:05:23,223 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 20:05:23,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-31 20:05:23,223 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:05:23,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:05:23,223 INFO L85 PathProgramCache]: Analyzing trace with hash 927739759, now seen corresponding path program 17 times [2022-01-31 20:05:23,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:05:23,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1661125223] [2022-01-31 20:05:23,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:05:23,225 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:05:23,225 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:05:23,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:05:23,226 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:05:23,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:23,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:05:23,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:23,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:05:23,515 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:05:23,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1661125223] [2022-01-31 20:05:23,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1661125223] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:05:23,516 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:05:23,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 20:05:23,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748197184] [2022-01-31 20:05:23,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:05:23,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 20:05:23,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:05:23,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 20:05:23,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2022-01-31 20:05:23,517 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand has 22 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:05:23,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:05:23,909 INFO L93 Difference]: Finished difference Result 213 states and 236 transitions. [2022-01-31 20:05:23,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 20:05:23,909 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-01-31 20:05:23,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:05:23,911 INFO L225 Difference]: With dead ends: 213 [2022-01-31 20:05:23,911 INFO L226 Difference]: Without dead ends: 166 [2022-01-31 20:05:23,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=239, Invalid=313, Unknown=0, NotChecked=0, Total=552 [2022-01-31 20:05:23,912 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 206 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:05:23,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 40 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 20:05:23,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-01-31 20:05:23,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 92. [2022-01-31 20:05:23,926 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 20:05:23,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2022-01-31 20:05:23,927 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 83 [2022-01-31 20:05:23,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:05:23,927 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2022-01-31 20:05:23,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:05:23,927 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2022-01-31 20:05:23,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-01-31 20:05:23,928 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:05:23,928 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 20:05:23,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-31 20:05:23,928 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:05:23,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:05:23,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1204212203, now seen corresponding path program 18 times [2022-01-31 20:05:23,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:05:23,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1623914] [2022-01-31 20:05:23,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:05:23,931 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:05:23,931 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:05:23,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:05:23,932 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:05:23,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:24,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:05:24,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:24,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:05:24,155 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:05:24,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1623914] [2022-01-31 20:05:24,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1623914] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:05:24,155 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:05:24,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 20:05:24,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830275356] [2022-01-31 20:05:24,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:05:24,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 20:05:24,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:05:24,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 20:05:24,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2022-01-31 20:05:24,156 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 20:05:24,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:05:24,530 INFO L93 Difference]: Finished difference Result 223 states and 247 transitions. [2022-01-31 20:05:24,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 20:05:24,531 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 20:05:24,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:05:24,532 INFO L225 Difference]: With dead ends: 223 [2022-01-31 20:05:24,532 INFO L226 Difference]: Without dead ends: 174 [2022-01-31 20:05:24,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=234, Invalid=272, Unknown=0, NotChecked=0, Total=506 [2022-01-31 20:05:24,533 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 228 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:05:24,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 67 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 20:05:24,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-01-31 20:05:24,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 96. [2022-01-31 20:05:24,550 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 20:05:24,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2022-01-31 20:05:24,550 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 87 [2022-01-31 20:05:24,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:05:24,551 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2022-01-31 20:05:24,551 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 20:05:24,551 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2022-01-31 20:05:24,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-01-31 20:05:24,551 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:05:24,551 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 20:05:24,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-31 20:05:24,552 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:05:24,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:05:24,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1086375527, now seen corresponding path program 19 times [2022-01-31 20:05:24,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:05:24,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1291920646] [2022-01-31 20:05:24,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:05:24,553 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:05:24,553 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:05:24,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:05:24,555 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:05:24,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:24,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:05:24,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:24,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:05:24,782 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:05:24,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1291920646] [2022-01-31 20:05:24,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1291920646] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:05:24,782 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:05:24,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 20:05:24,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086054301] [2022-01-31 20:05:24,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:05:24,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 20:05:24,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:05:24,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 20:05:24,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2022-01-31 20:05:24,783 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 20:05:25,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:05:25,187 INFO L93 Difference]: Finished difference Result 233 states and 258 transitions. [2022-01-31 20:05:25,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 20:05:25,188 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 20:05:25,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:05:25,190 INFO L225 Difference]: With dead ends: 233 [2022-01-31 20:05:25,191 INFO L226 Difference]: Without dead ends: 182 [2022-01-31 20:05:25,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=256, Invalid=296, Unknown=0, NotChecked=0, Total=552 [2022-01-31 20:05:25,192 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 181 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:05:25,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 79 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 20:05:25,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-01-31 20:05:25,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 100. [2022-01-31 20:05:25,218 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 20:05:25,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2022-01-31 20:05:25,220 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 91 [2022-01-31 20:05:25,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:05:25,220 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2022-01-31 20:05:25,220 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 20:05:25,220 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2022-01-31 20:05:25,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-01-31 20:05:25,221 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:05:25,221 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 20:05:25,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-31 20:05:25,221 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:05:25,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:05:25,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1899688733, now seen corresponding path program 20 times [2022-01-31 20:05:25,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:05:25,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [536161007] [2022-01-31 20:05:25,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:05:25,224 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:05:25,224 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:05:25,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:05:25,227 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:05:25,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:25,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:05:25,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:25,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:05:25,467 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:05:25,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [536161007] [2022-01-31 20:05:25,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [536161007] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:05:25,467 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:05:25,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 20:05:25,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681923229] [2022-01-31 20:05:25,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:05:25,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 20:05:25,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:05:25,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 20:05:25,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2022-01-31 20:05:25,469 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 20:05:25,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:05:25,876 INFO L93 Difference]: Finished difference Result 243 states and 269 transitions. [2022-01-31 20:05:25,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 20:05:25,877 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 20:05:25,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:05:25,879 INFO L225 Difference]: With dead ends: 243 [2022-01-31 20:05:25,880 INFO L226 Difference]: Without dead ends: 190 [2022-01-31 20:05:25,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=279, Invalid=321, Unknown=0, NotChecked=0, Total=600 [2022-01-31 20:05:25,881 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 191 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:05:25,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 81 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 20:05:25,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-01-31 20:05:25,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 104. [2022-01-31 20:05:25,908 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 20:05:25,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2022-01-31 20:05:25,909 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 95 [2022-01-31 20:05:25,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:05:25,909 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2022-01-31 20:05:25,909 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 20:05:25,909 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2022-01-31 20:05:25,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-01-31 20:05:25,910 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:05:25,910 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 20:05:25,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-31 20:05:25,910 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:05:25,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:05:25,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1339991391, now seen corresponding path program 21 times [2022-01-31 20:05:25,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:05:25,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [593383014] [2022-01-31 20:05:25,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:05:25,912 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:05:25,912 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:05:25,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:05:25,914 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:05:25,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:26,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:05:26,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:26,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:05:26,137 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:05:26,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [593383014] [2022-01-31 20:05:26,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [593383014] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:05:26,137 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:05:26,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 20:05:26,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890496570] [2022-01-31 20:05:26,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:05:26,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 20:05:26,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:05:26,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 20:05:26,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2022-01-31 20:05:26,138 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 20:05:26,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:05:26,589 INFO L93 Difference]: Finished difference Result 253 states and 280 transitions. [2022-01-31 20:05:26,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 20:05:26,589 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 20:05:26,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:05:26,590 INFO L225 Difference]: With dead ends: 253 [2022-01-31 20:05:26,590 INFO L226 Difference]: Without dead ends: 198 [2022-01-31 20:05:26,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2022-01-31 20:05:26,591 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 174 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:05:26,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 88 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 20:05:26,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-01-31 20:05:26,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 108. [2022-01-31 20:05:26,619 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 20:05:26,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2022-01-31 20:05:26,620 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 99 [2022-01-31 20:05:26,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:05:26,620 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2022-01-31 20:05:26,620 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 20:05:26,620 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2022-01-31 20:05:26,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-01-31 20:05:26,621 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:05:26,621 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 20:05:26,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-31 20:05:26,621 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:05:26,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:05:26,621 INFO L85 PathProgramCache]: Analyzing trace with hash -744976421, now seen corresponding path program 22 times [2022-01-31 20:05:26,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:05:26,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [37870094] [2022-01-31 20:05:26,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:05:26,623 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:05:26,623 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:05:26,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:05:26,625 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:05:26,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:26,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:05:26,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:26,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:05:26,911 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:05:26,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [37870094] [2022-01-31 20:05:26,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [37870094] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:05:26,911 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:05:26,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 20:05:26,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412832252] [2022-01-31 20:05:26,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:05:26,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 20:05:26,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:05:26,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 20:05:26,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-01-31 20:05:26,914 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 20:05:27,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:05:27,445 INFO L93 Difference]: Finished difference Result 263 states and 291 transitions. [2022-01-31 20:05:27,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 20:05:27,445 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 20:05:27,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:05:27,446 INFO L225 Difference]: With dead ends: 263 [2022-01-31 20:05:27,446 INFO L226 Difference]: Without dead ends: 206 [2022-01-31 20:05:27,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=328, Invalid=374, Unknown=0, NotChecked=0, Total=702 [2022-01-31 20:05:27,447 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 223 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:05:27,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 80 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:05:27,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-01-31 20:05:27,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 112. [2022-01-31 20:05:27,473 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 20:05:27,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2022-01-31 20:05:27,474 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 103 [2022-01-31 20:05:27,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:05:27,474 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2022-01-31 20:05:27,474 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 20:05:27,474 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2022-01-31 20:05:27,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-01-31 20:05:27,475 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:05:27,475 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 20:05:27,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-31 20:05:27,475 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:05:27,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:05:27,475 INFO L85 PathProgramCache]: Analyzing trace with hash 452840535, now seen corresponding path program 23 times [2022-01-31 20:05:27,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:05:27,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1164819274] [2022-01-31 20:05:27,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:05:27,477 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:05:27,477 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:05:27,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:05:27,480 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:05:27,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:27,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:05:27,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:27,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:05:27,767 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:05:27,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1164819274] [2022-01-31 20:05:27,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1164819274] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:05:27,767 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:05:27,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 20:05:27,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171866117] [2022-01-31 20:05:27,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:05:27,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 20:05:27,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:05:27,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 20:05:27,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2022-01-31 20:05:27,768 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 20:05:28,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:05:28,321 INFO L93 Difference]: Finished difference Result 273 states and 302 transitions. [2022-01-31 20:05:28,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 20:05:28,322 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 20:05:28,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:05:28,323 INFO L225 Difference]: With dead ends: 273 [2022-01-31 20:05:28,323 INFO L226 Difference]: Without dead ends: 214 [2022-01-31 20:05:28,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=354, Invalid=402, Unknown=0, NotChecked=0, Total=756 [2022-01-31 20:05:28,324 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 206 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:05:28,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 102 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:05:28,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-01-31 20:05:28,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 116. [2022-01-31 20:05:28,348 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 20:05:28,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 118 transitions. [2022-01-31 20:05:28,348 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 118 transitions. Word has length 107 [2022-01-31 20:05:28,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:05:28,348 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 118 transitions. [2022-01-31 20:05:28,348 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 20:05:28,348 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 118 transitions. [2022-01-31 20:05:28,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-01-31 20:05:28,349 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:05:28,349 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 20:05:28,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-31 20:05:28,349 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:05:28,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:05:28,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1486445267, now seen corresponding path program 24 times [2022-01-31 20:05:28,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:05:28,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1406148474] [2022-01-31 20:05:28,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:05:28,351 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:05:28,351 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:05:28,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:05:28,354 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:05:28,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:28,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:05:28,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:28,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:05:28,670 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:05:28,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1406148474] [2022-01-31 20:05:28,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1406148474] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:05:28,670 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:05:28,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 20:05:28,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466780340] [2022-01-31 20:05:28,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:05:28,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 20:05:28,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:05:28,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 20:05:28,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2022-01-31 20:05:28,672 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 20:05:29,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:05:29,390 INFO L93 Difference]: Finished difference Result 283 states and 313 transitions. [2022-01-31 20:05:29,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 20:05:29,390 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 20:05:29,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:05:29,392 INFO L225 Difference]: With dead ends: 283 [2022-01-31 20:05:29,392 INFO L226 Difference]: Without dead ends: 222 [2022-01-31 20:05:29,392 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=381, Invalid=431, Unknown=0, NotChecked=0, Total=812 [2022-01-31 20:05:29,393 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 210 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:05:29,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 99 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:05:29,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-01-31 20:05:29,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 120. [2022-01-31 20:05:29,436 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 20:05:29,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 122 transitions. [2022-01-31 20:05:29,436 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 122 transitions. Word has length 111 [2022-01-31 20:05:29,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:05:29,437 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 122 transitions. [2022-01-31 20:05:29,437 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 20:05:29,437 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 122 transitions. [2022-01-31 20:05:29,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-01-31 20:05:29,451 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:05:29,451 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 20:05:29,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-01-31 20:05:29,451 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:05:29,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:05:29,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1886796623, now seen corresponding path program 25 times [2022-01-31 20:05:29,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:05:29,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [510927829] [2022-01-31 20:05:29,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:05:29,458 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:05:29,458 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:05:29,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:05:29,461 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:05:29,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:29,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:05:29,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:29,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:05:29,847 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:05:29,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [510927829] [2022-01-31 20:05:29,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [510927829] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:05:29,847 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:05:29,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 20:05:29,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504347717] [2022-01-31 20:05:29,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:05:29,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 20:05:29,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:05:29,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 20:05:29,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2022-01-31 20:05:29,849 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 20:05:30,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:05:30,793 INFO L93 Difference]: Finished difference Result 293 states and 324 transitions. [2022-01-31 20:05:30,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 20:05:30,793 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 20:05:30,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:05:30,797 INFO L225 Difference]: With dead ends: 293 [2022-01-31 20:05:30,797 INFO L226 Difference]: Without dead ends: 230 [2022-01-31 20:05:30,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=409, Invalid=461, Unknown=0, NotChecked=0, Total=870 [2022-01-31 20:05:30,798 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 253 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:05:30,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 96 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:05:30,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-01-31 20:05:30,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 124. [2022-01-31 20:05:30,861 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 20:05:30,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 126 transitions. [2022-01-31 20:05:30,865 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 126 transitions. Word has length 115 [2022-01-31 20:05:30,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:05:30,865 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 126 transitions. [2022-01-31 20:05:30,865 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 20:05:30,865 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 126 transitions. [2022-01-31 20:05:30,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-01-31 20:05:30,865 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:05:30,879 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 20:05:30,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-01-31 20:05:30,880 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:05:30,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:05:30,881 INFO L85 PathProgramCache]: Analyzing trace with hash 2015325643, now seen corresponding path program 26 times [2022-01-31 20:05:30,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:05:30,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1671831863] [2022-01-31 20:05:30,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:05:30,883 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:05:30,883 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:05:30,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:05:30,899 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:05:30,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:31,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:05:31,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:31,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:05:31,550 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:05:31,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1671831863] [2022-01-31 20:05:31,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1671831863] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:05:31,550 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:05:31,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 20:05:31,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279208276] [2022-01-31 20:05:31,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:05:31,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 20:05:31,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:05:31,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 20:05:31,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2022-01-31 20:05:31,552 INFO L87 Difference]: Start difference. First operand 124 states and 126 transitions. Second operand has 31 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:05:32,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:05:32,745 INFO L93 Difference]: Finished difference Result 303 states and 335 transitions. [2022-01-31 20:05:32,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 20:05:32,745 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 119 [2022-01-31 20:05:32,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:05:32,759 INFO L225 Difference]: With dead ends: 303 [2022-01-31 20:05:32,759 INFO L226 Difference]: Without dead ends: 238 [2022-01-31 20:05:32,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=473, Invalid=583, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 20:05:32,760 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 379 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 364 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 364 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:05:32,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 48 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [364 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 20:05:32,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-01-31 20:05:32,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 128. [2022-01-31 20:05:32,827 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 20:05:32,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 130 transitions. [2022-01-31 20:05:32,827 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 130 transitions. Word has length 119 [2022-01-31 20:05:32,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:05:32,827 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 130 transitions. [2022-01-31 20:05:32,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:05:32,828 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 130 transitions. [2022-01-31 20:05:32,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-01-31 20:05:32,828 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:05:32,828 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 20:05:32,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-01-31 20:05:32,828 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:05:32,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:05:32,829 INFO L85 PathProgramCache]: Analyzing trace with hash 916451911, now seen corresponding path program 27 times [2022-01-31 20:05:32,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:05:32,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1966576717] [2022-01-31 20:05:32,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:05:32,830 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:05:32,830 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:05:32,830 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:05:32,833 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:05:32,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:33,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:05:33,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:33,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:05:33,365 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:05:33,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1966576717] [2022-01-31 20:05:33,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1966576717] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:05:33,365 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:05:33,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 20:05:33,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774062981] [2022-01-31 20:05:33,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:05:33,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 20:05:33,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:05:33,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 20:05:33,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2022-01-31 20:05:33,367 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 20:05:34,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:05:34,571 INFO L93 Difference]: Finished difference Result 313 states and 346 transitions. [2022-01-31 20:05:34,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 20:05:34,571 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 20:05:34,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:05:34,572 INFO L225 Difference]: With dead ends: 313 [2022-01-31 20:05:34,573 INFO L226 Difference]: Without dead ends: 246 [2022-01-31 20:05:34,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=468, Invalid=524, Unknown=0, NotChecked=0, Total=992 [2022-01-31 20:05:34,577 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 273 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:05:34,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 95 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 20:05:34,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-01-31 20:05:34,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 132. [2022-01-31 20:05:34,621 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 20:05:34,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 134 transitions. [2022-01-31 20:05:34,622 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 134 transitions. Word has length 123 [2022-01-31 20:05:34,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:05:34,622 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 134 transitions. [2022-01-31 20:05:34,622 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 20:05:34,622 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 134 transitions. [2022-01-31 20:05:34,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-01-31 20:05:34,627 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:05:34,627 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 20:05:34,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-01-31 20:05:34,628 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:05:34,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:05:34,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1534932797, now seen corresponding path program 28 times [2022-01-31 20:05:34,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:05:34,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1650064048] [2022-01-31 20:05:34,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:05:34,630 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:05:34,630 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:05:34,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:05:34,633 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:05:34,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:35,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:05:35,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:35,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:05:35,062 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:05:35,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1650064048] [2022-01-31 20:05:35,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1650064048] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:05:35,063 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:05:35,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 20:05:35,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611412068] [2022-01-31 20:05:35,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:05:35,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 20:05:35,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:05:35,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 20:05:35,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2022-01-31 20:05:35,064 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 20:05:36,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:05:36,145 INFO L93 Difference]: Finished difference Result 323 states and 357 transitions. [2022-01-31 20:05:36,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 20:05:36,146 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 20:05:36,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:05:36,147 INFO L225 Difference]: With dead ends: 323 [2022-01-31 20:05:36,147 INFO L226 Difference]: Without dead ends: 254 [2022-01-31 20:05:36,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=499, Invalid=557, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 20:05:36,148 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 259 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 233 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 233 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:05:36,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 102 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [233 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:05:36,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-01-31 20:05:36,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 136. [2022-01-31 20:05:36,197 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 20:05:36,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 138 transitions. [2022-01-31 20:05:36,198 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 138 transitions. Word has length 127 [2022-01-31 20:05:36,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:05:36,198 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 138 transitions. [2022-01-31 20:05:36,199 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 20:05:36,199 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 138 transitions. [2022-01-31 20:05:36,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-01-31 20:05:36,200 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:05:36,201 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 20:05:36,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-01-31 20:05:36,201 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:05:36,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:05:36,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1808986431, now seen corresponding path program 29 times [2022-01-31 20:05:36,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:05:36,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1213004078] [2022-01-31 20:05:36,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:05:36,205 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:05:36,205 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:05:36,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:05:36,209 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:05:36,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:36,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:05:36,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:36,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:05:36,756 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:05:36,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1213004078] [2022-01-31 20:05:36,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1213004078] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:05:36,756 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:05:36,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 20:05:36,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82885845] [2022-01-31 20:05:36,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:05:36,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 20:05:36,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:05:36,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 20:05:36,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 20:05:36,758 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 20:05:37,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:05:37,921 INFO L93 Difference]: Finished difference Result 333 states and 368 transitions. [2022-01-31 20:05:37,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 20:05:37,922 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 20:05:37,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:05:37,923 INFO L225 Difference]: With dead ends: 333 [2022-01-31 20:05:37,923 INFO L226 Difference]: Without dead ends: 262 [2022-01-31 20:05:37,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=531, Invalid=591, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 20:05:37,928 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 245 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:05:37,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 119 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 20:05:37,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-01-31 20:05:38,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 140. [2022-01-31 20:05:38,034 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 20:05:38,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 142 transitions. [2022-01-31 20:05:38,035 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 142 transitions. Word has length 131 [2022-01-31 20:05:38,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:05:38,035 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 142 transitions. [2022-01-31 20:05:38,035 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 20:05:38,035 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 142 transitions. [2022-01-31 20:05:38,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-01-31 20:05:38,035 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:05:38,036 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 20:05:38,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-01-31 20:05:38,036 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:05:38,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:05:38,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1746627515, now seen corresponding path program 30 times [2022-01-31 20:05:38,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:05:38,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1869261321] [2022-01-31 20:05:38,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:05:38,038 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:05:38,038 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:05:38,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:05:38,041 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:05:38,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:38,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:05:38,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:38,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:05:38,494 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:05:38,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1869261321] [2022-01-31 20:05:38,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1869261321] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:05:38,494 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:05:38,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 20:05:38,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025153464] [2022-01-31 20:05:38,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:05:38,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 20:05:38,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:05:38,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 20:05:38,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 20:05:38,496 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 20:05:39,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:05:39,585 INFO L93 Difference]: Finished difference Result 343 states and 379 transitions. [2022-01-31 20:05:39,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 20:05:39,585 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 20:05:39,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:05:39,586 INFO L225 Difference]: With dead ends: 343 [2022-01-31 20:05:39,586 INFO L226 Difference]: Without dead ends: 270 [2022-01-31 20:05:39,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=564, Invalid=626, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 20:05:39,587 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 405 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 381 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 381 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:05:39,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [436 Valid, 96 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [381 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:05:39,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-01-31 20:05:39,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 144. [2022-01-31 20:05:39,628 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 20:05:39,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 146 transitions. [2022-01-31 20:05:39,629 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 146 transitions. Word has length 135 [2022-01-31 20:05:39,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:05:39,629 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 146 transitions. [2022-01-31 20:05:39,629 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 20:05:39,629 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 146 transitions. [2022-01-31 20:05:39,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-01-31 20:05:39,630 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:05:39,630 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 20:05:39,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-01-31 20:05:39,630 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:05:39,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:05:39,630 INFO L85 PathProgramCache]: Analyzing trace with hash 644298807, now seen corresponding path program 31 times [2022-01-31 20:05:39,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:05:39,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [421982701] [2022-01-31 20:05:39,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:05:39,632 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:05:39,632 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:05:39,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:05:39,635 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:05:39,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:40,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:05:40,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:40,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:05:40,092 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:05:40,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [421982701] [2022-01-31 20:05:40,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [421982701] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:05:40,093 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:05:40,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 20:05:40,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517074922] [2022-01-31 20:05:40,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:05:40,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 20:05:40,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:05:40,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 20:05:40,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 20:05:40,094 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 20:05:41,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:05:41,263 INFO L93 Difference]: Finished difference Result 353 states and 390 transitions. [2022-01-31 20:05:41,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 20:05:41,263 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 20:05:41,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:05:41,264 INFO L225 Difference]: With dead ends: 353 [2022-01-31 20:05:41,264 INFO L226 Difference]: Without dead ends: 278 [2022-01-31 20:05:41,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=598, Invalid=662, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 20:05:41,265 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 349 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 321 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 321 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:05:41,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [381 Valid, 103 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [321 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:05:41,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-01-31 20:05:41,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 148. [2022-01-31 20:05:41,308 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 20:05:41,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 150 transitions. [2022-01-31 20:05:41,308 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 150 transitions. Word has length 139 [2022-01-31 20:05:41,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:05:41,309 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 150 transitions. [2022-01-31 20:05:41,309 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 20:05:41,309 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 150 transitions. [2022-01-31 20:05:41,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-01-31 20:05:41,309 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:05:41,309 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 20:05:41,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-01-31 20:05:41,310 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:05:41,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:05:41,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1698780851, now seen corresponding path program 32 times [2022-01-31 20:05:41,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:05:41,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2145057471] [2022-01-31 20:05:41,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:05:41,312 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:05:41,312 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:05:41,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:05:41,315 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:05:41,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:41,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:05:41,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:41,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:05:41,971 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:05:41,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2145057471] [2022-01-31 20:05:41,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2145057471] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:05:41,971 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:05:41,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 20:05:41,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697728948] [2022-01-31 20:05:41,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:05:41,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 20:05:41,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:05:41,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 20:05:41,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 20:05:41,972 INFO L87 Difference]: Start difference. First operand 148 states and 150 transitions. Second operand has 37 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:05:43,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:05:43,349 INFO L93 Difference]: Finished difference Result 363 states and 401 transitions. [2022-01-31 20:05:43,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 20:05:43,349 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2022-01-31 20:05:43,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:05:43,350 INFO L225 Difference]: With dead ends: 363 [2022-01-31 20:05:43,350 INFO L226 Difference]: Without dead ends: 286 [2022-01-31 20:05:43,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=674, Invalid=808, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 20:05:43,352 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 389 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 414 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 414 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:05:43,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [423 Valid, 57 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [414 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:05:43,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2022-01-31 20:05:43,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 152. [2022-01-31 20:05:43,396 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 20:05:43,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 154 transitions. [2022-01-31 20:05:43,397 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 154 transitions. Word has length 143 [2022-01-31 20:05:43,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:05:43,397 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 154 transitions. [2022-01-31 20:05:43,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:05:43,397 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 154 transitions. [2022-01-31 20:05:43,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-01-31 20:05:43,397 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:05:43,398 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 20:05:43,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-01-31 20:05:43,398 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:05:43,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:05:43,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1800091857, now seen corresponding path program 33 times [2022-01-31 20:05:43,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:05:43,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1112765853] [2022-01-31 20:05:43,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:05:43,400 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:05:43,400 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:05:43,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:05:43,403 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:05:43,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:43,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:05:43,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:43,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:05:43,971 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:05:43,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1112765853] [2022-01-31 20:05:43,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1112765853] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:05:43,972 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:05:43,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 20:05:43,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079353177] [2022-01-31 20:05:43,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:05:43,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 20:05:43,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:05:43,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 20:05:43,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 20:05:43,973 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 20:05:45,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:05:45,284 INFO L93 Difference]: Finished difference Result 373 states and 412 transitions. [2022-01-31 20:05:45,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 20:05:45,285 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 20:05:45,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:05:45,286 INFO L225 Difference]: With dead ends: 373 [2022-01-31 20:05:45,286 INFO L226 Difference]: Without dead ends: 294 [2022-01-31 20:05:45,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=669, Invalid=737, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 20:05:45,287 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 345 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 315 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 315 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:05:45,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [379 Valid, 112 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [315 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:05:45,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-01-31 20:05:45,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 156. [2022-01-31 20:05:45,336 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 20:05:45,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 158 transitions. [2022-01-31 20:05:45,337 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 158 transitions. Word has length 147 [2022-01-31 20:05:45,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:05:45,337 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 158 transitions. [2022-01-31 20:05:45,337 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 20:05:45,337 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 158 transitions. [2022-01-31 20:05:45,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-01-31 20:05:45,337 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:05:45,338 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 20:05:45,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-01-31 20:05:45,338 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:05:45,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:05:45,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1447856555, now seen corresponding path program 34 times [2022-01-31 20:05:45,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:05:45,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [681474305] [2022-01-31 20:05:45,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:05:45,342 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:05:45,343 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:05:45,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:05:45,347 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:05:45,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:45,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:05:45,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:45,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:05:45,880 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:05:45,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [681474305] [2022-01-31 20:05:45,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [681474305] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:05:45,881 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:05:45,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 20:05:45,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55366804] [2022-01-31 20:05:45,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:05:45,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 20:05:45,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:05:45,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 20:05:45,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 20:05:45,882 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 20:05:47,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:05:47,322 INFO L93 Difference]: Finished difference Result 383 states and 423 transitions. [2022-01-31 20:05:47,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 20:05:47,323 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 20:05:47,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:05:47,324 INFO L225 Difference]: With dead ends: 383 [2022-01-31 20:05:47,324 INFO L226 Difference]: Without dead ends: 302 [2022-01-31 20:05:47,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=706, Invalid=776, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 20:05:47,325 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 526 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 495 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 495 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:05:47,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [561 Valid, 99 Invalid, 869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [495 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:05:47,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-01-31 20:05:47,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 160. [2022-01-31 20:05:47,377 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 20:05:47,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 162 transitions. [2022-01-31 20:05:47,377 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 162 transitions. Word has length 151 [2022-01-31 20:05:47,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:05:47,378 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 162 transitions. [2022-01-31 20:05:47,378 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 20:05:47,378 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 162 transitions. [2022-01-31 20:05:47,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-01-31 20:05:47,378 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:05:47,378 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 20:05:47,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-01-31 20:05:47,379 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:05:47,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:05:47,379 INFO L85 PathProgramCache]: Analyzing trace with hash -49045977, now seen corresponding path program 35 times [2022-01-31 20:05:47,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:05:47,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1131999639] [2022-01-31 20:05:47,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:05:47,381 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:05:47,381 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:05:47,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:05:47,384 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:05:47,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:48,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:05:48,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:48,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:05:48,131 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:05:48,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1131999639] [2022-01-31 20:05:48,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1131999639] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:05:48,132 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:05:48,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-01-31 20:05:48,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755054651] [2022-01-31 20:05:48,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:05:48,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 20:05:48,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:05:48,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 20:05:48,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 20:05:48,133 INFO L87 Difference]: Start difference. First operand 160 states and 162 transitions. Second operand has 40 states, 39 states have (on average 2.128205128205128) internal successors, (83), 38 states have internal predecessors, (83), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:05:49,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:05:49,755 INFO L93 Difference]: Finished difference Result 393 states and 434 transitions. [2022-01-31 20:05:49,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-31 20:05:49,755 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.128205128205128) internal successors, (83), 38 states have internal predecessors, (83), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 155 [2022-01-31 20:05:49,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:05:49,756 INFO L225 Difference]: With dead ends: 393 [2022-01-31 20:05:49,756 INFO L226 Difference]: Without dead ends: 310 [2022-01-31 20:05:49,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=788, Invalid=934, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 20:05:49,757 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 347 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 373 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 373 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:05:49,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [384 Valid, 64 Invalid, 861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [373 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:05:49,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2022-01-31 20:05:49,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 164. [2022-01-31 20:05:49,810 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 20:05:49,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 166 transitions. [2022-01-31 20:05:49,810 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 166 transitions. Word has length 155 [2022-01-31 20:05:49,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:05:49,811 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 166 transitions. [2022-01-31 20:05:49,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.128205128205128) internal successors, (83), 38 states have internal predecessors, (83), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:05:49,811 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 166 transitions. [2022-01-31 20:05:49,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-01-31 20:05:49,811 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:05:49,811 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 20:05:49,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-01-31 20:05:49,811 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:05:49,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:05:49,812 INFO L85 PathProgramCache]: Analyzing trace with hash 227869859, now seen corresponding path program 36 times [2022-01-31 20:05:49,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:05:49,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [184793910] [2022-01-31 20:05:49,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:05:49,814 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:05:49,814 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:05:49,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:05:49,817 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:05:49,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:50,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:05:50,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:50,586 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 20:05:50,586 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:05:50,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [184793910] [2022-01-31 20:05:50,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [184793910] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:05:50,587 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:05:50,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-01-31 20:05:50,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225211402] [2022-01-31 20:05:50,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:05:50,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-31 20:05:50,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:05:50,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-31 20:05:50,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 20:05:50,588 INFO L87 Difference]: Start difference. First operand 164 states and 166 transitions. Second operand has 41 states, 40 states have (on average 2.125) internal successors, (85), 39 states have internal predecessors, (85), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:05:52,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:05:52,297 INFO L93 Difference]: Finished difference Result 403 states and 445 transitions. [2022-01-31 20:05:52,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-31 20:05:52,298 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 2.125) internal successors, (85), 39 states have internal predecessors, (85), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 159 [2022-01-31 20:05:52,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:05:52,299 INFO L225 Difference]: With dead ends: 403 [2022-01-31 20:05:52,299 INFO L226 Difference]: Without dead ends: 318 [2022-01-31 20:05:52,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=828, Invalid=978, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 20:05:52,300 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 498 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 489 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 536 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 489 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:05:52,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [536 Valid, 60 Invalid, 956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [489 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:05:52,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-01-31 20:05:52,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 168. [2022-01-31 20:05:52,359 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 20:05:52,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 170 transitions. [2022-01-31 20:05:52,359 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 170 transitions. Word has length 159 [2022-01-31 20:05:52,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:05:52,359 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 170 transitions. [2022-01-31 20:05:52,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 2.125) internal successors, (85), 39 states have internal predecessors, (85), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:05:52,360 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 170 transitions. [2022-01-31 20:05:52,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-01-31 20:05:52,360 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:05:52,360 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 20:05:52,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-01-31 20:05:52,361 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:05:52,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:05:52,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1109672673, now seen corresponding path program 37 times [2022-01-31 20:05:52,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:05:52,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2007622608] [2022-01-31 20:05:52,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:05:52,363 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:05:52,363 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:05:52,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:05:52,366 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:05:52,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:53,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:05:53,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:53,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:05:53,166 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:05:53,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2007622608] [2022-01-31 20:05:53,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2007622608] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:05:53,166 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:05:53,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-01-31 20:05:53,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136069850] [2022-01-31 20:05:53,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:05:53,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 20:05:53,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:05:53,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 20:05:53,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 20:05:53,167 INFO L87 Difference]: Start difference. First operand 168 states and 170 transitions. Second operand has 42 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:05:55,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:05:55,026 INFO L93 Difference]: Finished difference Result 413 states and 456 transitions. [2022-01-31 20:05:55,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-31 20:05:55,027 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 163 [2022-01-31 20:05:55,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:05:55,028 INFO L225 Difference]: With dead ends: 413 [2022-01-31 20:05:55,029 INFO L226 Difference]: Without dead ends: 326 [2022-01-31 20:05:55,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=869, Invalid=1023, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 20:05:55,030 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 463 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 491 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 502 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 1065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 491 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:05:55,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [502 Valid, 64 Invalid, 1065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [491 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 20:05:55,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-01-31 20:05:55,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 172. [2022-01-31 20:05:55,089 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 20:05:55,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 174 transitions. [2022-01-31 20:05:55,090 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 174 transitions. Word has length 163 [2022-01-31 20:05:55,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:05:55,090 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 174 transitions. [2022-01-31 20:05:55,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:05:55,090 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 174 transitions. [2022-01-31 20:05:55,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-01-31 20:05:55,091 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:05:55,091 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 20:05:55,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-01-31 20:05:55,091 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:05:55,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:05:55,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1970456475, now seen corresponding path program 38 times [2022-01-31 20:05:55,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:05:55,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1517595569] [2022-01-31 20:05:55,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:05:55,093 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:05:55,093 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:05:55,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:05:55,097 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:05:55,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:55,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:05:55,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:55,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:05:55,714 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:05:55,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1517595569] [2022-01-31 20:05:55,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1517595569] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:05:55,714 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:05:55,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-01-31 20:05:55,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763219264] [2022-01-31 20:05:55,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:05:55,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 20:05:55,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:05:55,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 20:05:55,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 20:05:55,716 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 20:05:57,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:05:57,485 INFO L93 Difference]: Finished difference Result 423 states and 467 transitions. [2022-01-31 20:05:57,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-31 20:05:57,486 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 20:05:57,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:05:57,487 INFO L225 Difference]: With dead ends: 423 [2022-01-31 20:05:57,487 INFO L226 Difference]: Without dead ends: 334 [2022-01-31 20:05:57,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=864, Invalid=942, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 20:05:57,488 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 353 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 317 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 317 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:05:57,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [392 Valid, 127 Invalid, 799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [317 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:05:57,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2022-01-31 20:05:57,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 176. [2022-01-31 20:05:57,546 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 20:05:57,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 178 transitions. [2022-01-31 20:05:57,547 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 178 transitions. Word has length 167 [2022-01-31 20:05:57,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:05:57,547 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 178 transitions. [2022-01-31 20:05:57,547 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 20:05:57,547 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 178 transitions. [2022-01-31 20:05:57,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-01-31 20:05:57,548 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:05:57,548 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 20:05:57,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-01-31 20:05:57,548 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:05:57,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:05:57,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1298474007, now seen corresponding path program 39 times [2022-01-31 20:05:57,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:05:57,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1068695586] [2022-01-31 20:05:57,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:05:57,550 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:05:57,550 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:05:57,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:05:57,554 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:05:57,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:58,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:05:58,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:58,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:05:58,440 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:05:58,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1068695586] [2022-01-31 20:05:58,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1068695586] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:05:58,440 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:05:58,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-01-31 20:05:58,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107449978] [2022-01-31 20:05:58,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:05:58,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 20:05:58,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:05:58,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 20:05:58,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 20:05:58,442 INFO L87 Difference]: Start difference. First operand 176 states and 178 transitions. Second operand has 44 states, 43 states have (on average 2.116279069767442) internal successors, (91), 42 states have internal predecessors, (91), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:06:00,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:06:00,473 INFO L93 Difference]: Finished difference Result 433 states and 478 transitions. [2022-01-31 20:06:00,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 20:06:00,474 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 2.116279069767442) internal successors, (91), 42 states have internal predecessors, (91), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 171 [2022-01-31 20:06:00,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:06:00,475 INFO L225 Difference]: With dead ends: 433 [2022-01-31 20:06:00,475 INFO L226 Difference]: Without dead ends: 342 [2022-01-31 20:06:00,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=954, Invalid=1116, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 20:06:00,476 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 486 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 477 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 477 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:06:00,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [527 Valid, 65 Invalid, 989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [477 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 20:06:00,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2022-01-31 20:06:00,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 180. [2022-01-31 20:06:00,537 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 20:06:00,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 182 transitions. [2022-01-31 20:06:00,537 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 182 transitions. Word has length 171 [2022-01-31 20:06:00,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:06:00,537 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 182 transitions. [2022-01-31 20:06:00,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 2.116279069767442) internal successors, (91), 42 states have internal predecessors, (91), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:06:00,537 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 182 transitions. [2022-01-31 20:06:00,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-01-31 20:06:00,538 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:06:00,538 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 20:06:00,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-01-31 20:06:00,538 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:06:00,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:06:00,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1874996589, now seen corresponding path program 40 times [2022-01-31 20:06:00,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:06:00,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1094465132] [2022-01-31 20:06:00,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:06:00,540 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:06:00,541 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:06:00,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:06:00,550 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:06:00,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:01,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:06:01,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:01,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:06:01,483 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:06:01,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1094465132] [2022-01-31 20:06:01,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1094465132] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:06:01,483 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:06:01,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-01-31 20:06:01,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773010072] [2022-01-31 20:06:01,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:06:01,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-31 20:06:01,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:06:01,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-31 20:06:01,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 20:06:01,485 INFO L87 Difference]: Start difference. First operand 180 states and 182 transitions. Second operand has 45 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 43 states have internal predecessors, (93), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:06:03,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:06:03,604 INFO L93 Difference]: Finished difference Result 443 states and 489 transitions. [2022-01-31 20:06:03,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-31 20:06:03,605 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 43 states have internal predecessors, (93), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 175 [2022-01-31 20:06:03,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:06:03,606 INFO L225 Difference]: With dead ends: 443 [2022-01-31 20:06:03,606 INFO L226 Difference]: Without dead ends: 350 [2022-01-31 20:06:03,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=998, Invalid=1164, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 20:06:03,607 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 634 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 663 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 676 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 1203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 663 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:06:03,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [676 Valid, 65 Invalid, 1203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [663 Valid, 540 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 20:06:03,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-01-31 20:06:03,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 184. [2022-01-31 20:06:03,673 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 20:06:03,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 186 transitions. [2022-01-31 20:06:03,673 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 186 transitions. Word has length 175 [2022-01-31 20:06:03,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:06:03,674 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 186 transitions. [2022-01-31 20:06:03,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 43 states have internal predecessors, (93), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:06:03,674 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 186 transitions. [2022-01-31 20:06:03,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-01-31 20:06:03,674 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:06:03,674 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 20:06:03,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-01-31 20:06:03,675 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:06:03,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:06:03,675 INFO L85 PathProgramCache]: Analyzing trace with hash 973591311, now seen corresponding path program 41 times [2022-01-31 20:06:03,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:06:03,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1280418697] [2022-01-31 20:06:03,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:06:03,677 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:06:03,677 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:06:03,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:06:03,682 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:06:03,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:04,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:06:04,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:04,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:06:04,563 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:06:04,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1280418697] [2022-01-31 20:06:04,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1280418697] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:06:04,563 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:06:04,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-01-31 20:06:04,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90265492] [2022-01-31 20:06:04,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:06:04,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-31 20:06:04,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:06:04,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-31 20:06:04,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 20:06:04,564 INFO L87 Difference]: Start difference. First operand 184 states and 186 transitions. Second operand has 46 states, 45 states have (on average 2.111111111111111) internal successors, (95), 44 states have internal predecessors, (95), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:06:06,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:06:06,789 INFO L93 Difference]: Finished difference Result 453 states and 500 transitions. [2022-01-31 20:06:06,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 20:06:06,790 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.111111111111111) internal successors, (95), 44 states have internal predecessors, (95), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 179 [2022-01-31 20:06:06,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:06:06,791 INFO L225 Difference]: With dead ends: 453 [2022-01-31 20:06:06,791 INFO L226 Difference]: Without dead ends: 358 [2022-01-31 20:06:06,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1043, Invalid=1213, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 20:06:06,792 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 452 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 485 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 1027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 485 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:06:06,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [495 Valid, 64 Invalid, 1027 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [485 Valid, 542 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 20:06:06,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states.