/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/float-benchs/Muller_Kahan.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 22:52:36,630 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 22:52:36,631 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 22:52:36,685 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 22:52:36,695 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 22:52:36,695 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 22:52:36,696 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 22:52:36,697 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 22:52:36,697 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 22:52:36,698 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 22:52:36,699 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 22:52:36,700 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 22:52:36,701 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 22:52:36,707 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 22:52:36,711 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 22:52:36,712 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 22:52:36,715 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 22:52:36,719 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 22:52:36,720 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 22:52:36,720 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 22:52:36,723 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 22:52:36,735 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 22:52:36,735 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 22:52:36,737 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 22:52:36,737 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 22:52:36,737 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 22:52:36,737 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 22:52:36,737 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 22:52:36,737 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 22:52:36,737 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 22:52:36,737 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 22:52:36,738 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 22:52:36,738 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 22:52:36,738 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 22:52:36,738 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 22:52:36,738 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 22:52:36,738 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 22:52:36,738 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 22:52:36,738 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 22:52:36,738 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 22:52:36,739 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 22:52:36,739 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 22:52:36,739 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 22:52:36,739 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 22:52:36,739 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 22:52:36,951 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 22:52:36,967 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 22:52:36,969 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 22:52:36,970 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 22:52:36,972 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 22:52:36,973 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-benchs/Muller_Kahan.c [2022-01-31 22:52:37,017 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86282ccbf/43d5c9a3d37643afac443a38381e16ae/FLAG4901ead60 [2022-01-31 22:52:37,342 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 22:52:37,343 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-benchs/Muller_Kahan.c [2022-01-31 22:52:37,355 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86282ccbf/43d5c9a3d37643afac443a38381e16ae/FLAG4901ead60 [2022-01-31 22:52:37,775 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86282ccbf/43d5c9a3d37643afac443a38381e16ae [2022-01-31 22:52:37,777 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 22:52:37,779 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 22:52:37,780 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 22:52:37,780 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 22:52:37,783 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 22:52:37,783 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 10:52:37" (1/1) ... [2022-01-31 22:52:37,784 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c1c9f3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:52:37, skipping insertion in model container [2022-01-31 22:52:37,784 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 10:52:37" (1/1) ... [2022-01-31 22:52:37,788 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 22:52:37,798 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 22:52:37,946 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/float-benchs/Muller_Kahan.c[631,644] [2022-01-31 22:52:37,960 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 22:52:37,967 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 22:52:37,974 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/float-benchs/Muller_Kahan.c[631,644] [2022-01-31 22:52:37,977 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 22:52:37,986 INFO L208 MainTranslator]: Completed translation [2022-01-31 22:52:37,986 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:52:37 WrapperNode [2022-01-31 22:52:37,986 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 22:52:37,987 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 22:52:37,987 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 22:52:37,988 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 22:52:37,995 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:52:37" (1/1) ... [2022-01-31 22:52:37,996 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:52:37" (1/1) ... [2022-01-31 22:52:38,001 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:52:37" (1/1) ... [2022-01-31 22:52:38,002 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:52:37" (1/1) ... [2022-01-31 22:52:38,006 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:52:37" (1/1) ... [2022-01-31 22:52:38,009 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:52:37" (1/1) ... [2022-01-31 22:52:38,014 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:52:37" (1/1) ... [2022-01-31 22:52:38,016 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 22:52:38,017 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 22:52:38,017 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 22:52:38,017 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 22:52:38,018 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:52:37" (1/1) ... [2022-01-31 22:52:38,023 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 22:52:38,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 22:52:38,055 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 22:52:38,085 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 22:52:38,094 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 22:52:38,094 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 22:52:38,094 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 22:52:38,094 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 22:52:38,095 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 22:52:38,095 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 22:52:38,095 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 22:52:38,095 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 22:52:38,095 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 22:52:38,095 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 22:52:38,095 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 22:52:38,096 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 22:52:38,096 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 22:52:38,096 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 22:52:38,096 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 22:52:38,097 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 22:52:38,097 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 22:52:38,143 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 22:52:38,144 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 22:52:38,214 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 22:52:38,217 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 22:52:38,217 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-31 22:52:38,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 10:52:38 BoogieIcfgContainer [2022-01-31 22:52:38,218 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 22:52:38,220 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 22:52:38,220 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 22:52:38,222 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 22:52:38,222 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 10:52:37" (1/3) ... [2022-01-31 22:52:38,223 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e34a369 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 10:52:38, skipping insertion in model container [2022-01-31 22:52:38,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:52:37" (2/3) ... [2022-01-31 22:52:38,223 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e34a369 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 10:52:38, skipping insertion in model container [2022-01-31 22:52:38,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 10:52:38" (3/3) ... [2022-01-31 22:52:38,224 INFO L111 eAbstractionObserver]: Analyzing ICFG Muller_Kahan.c [2022-01-31 22:52:38,227 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 22:52:38,227 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 22:52:38,254 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 22:52:38,258 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 22:52:38,259 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 22:52:38,281 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 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 22:52:38,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-31 22:52:38,286 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:52:38,286 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:52:38,287 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:52:38,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:52:38,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1448535971, now seen corresponding path program 1 times [2022-01-31 22:52:38,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:52:38,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [424169717] [2022-01-31 22:52:38,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:52:38,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:52:38,354 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:52:38,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:52:38,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:52:38,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:52:38,435 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 22:52:38,436 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:52:38,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [424169717] [2022-01-31 22:52:38,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [424169717] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:52:38,439 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:52:38,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 22:52:38,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940136148] [2022-01-31 22:52:38,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:52:38,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 22:52:38,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:52:38,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 22:52:38,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 22:52:38,467 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 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 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:52:38,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:52:38,493 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2022-01-31 22:52:38,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 22:52:38,495 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-01-31 22:52:38,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:52:38,499 INFO L225 Difference]: With dead ends: 32 [2022-01-31 22:52:38,499 INFO L226 Difference]: Without dead ends: 13 [2022-01-31 22:52:38,501 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 22:52:38,503 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 11 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 22:52:38,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 22 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 22:52:38,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-01-31 22:52:38,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-01-31 22:52:38,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 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 22:52:38,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2022-01-31 22:52:38,536 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2022-01-31 22:52:38,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:52:38,536 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2022-01-31 22:52:38,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:52:38,537 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2022-01-31 22:52:38,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-31 22:52:38,538 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:52:38,538 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:52:38,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 22:52:38,539 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:52:38,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:52:38,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1442994845, now seen corresponding path program 1 times [2022-01-31 22:52:38,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:52:38,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [637309356] [2022-01-31 22:52:38,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:52:38,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:52:38,551 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:52:38,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:52:38,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:52:38,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:52:38,586 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 22:52:38,586 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:52:38,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [637309356] [2022-01-31 22:52:38,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [637309356] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:52:38,587 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:52:38,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 22:52:38,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319961144] [2022-01-31 22:52:38,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:52:38,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 22:52:38,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:52:38,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 22:52:38,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 22:52:38,590 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:52:38,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:52:38,610 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2022-01-31 22:52:38,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 22:52:38,611 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-01-31 22:52:38,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:52:38,611 INFO L225 Difference]: With dead ends: 20 [2022-01-31 22:52:38,612 INFO L226 Difference]: Without dead ends: 15 [2022-01-31 22:52:38,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 22:52:38,613 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 9 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 22:52:38,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 18 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 22:52:38,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-01-31 22:52:38,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2022-01-31 22:52:38,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 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 22:52:38,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2022-01-31 22:52:38,617 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2022-01-31 22:52:38,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:52:38,618 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2022-01-31 22:52:38,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:52:38,618 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2022-01-31 22:52:38,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-31 22:52:38,618 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:52:38,618 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:52:38,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 22:52:38,619 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:52:38,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:52:38,619 INFO L85 PathProgramCache]: Analyzing trace with hash 578970299, now seen corresponding path program 1 times [2022-01-31 22:52:38,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:52:38,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [277324478] [2022-01-31 22:52:38,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:52:38,634 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:52:38,639 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:52:38,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:52:38,647 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:52:38,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:52:38,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:52:38,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:52:38,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:52:38,706 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:52:38,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [277324478] [2022-01-31 22:52:38,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [277324478] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:52:38,707 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:52:38,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 22:52:38,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549868598] [2022-01-31 22:52:38,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:52:38,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 22:52:38,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:52:38,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 22:52:38,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 22:52:38,708 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:52:38,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:52:38,768 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2022-01-31 22:52:38,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 22:52:38,768 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-01-31 22:52:38,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:52:38,770 INFO L225 Difference]: With dead ends: 22 [2022-01-31 22:52:38,770 INFO L226 Difference]: Without dead ends: 17 [2022-01-31 22:52:38,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-31 22:52:38,771 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 22:52:38,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 23 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 22:52:38,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-01-31 22:52:38,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2022-01-31 22:52:38,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 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 22:52:38,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2022-01-31 22:52:38,775 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2022-01-31 22:52:38,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:52:38,776 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2022-01-31 22:52:38,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:52:38,777 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2022-01-31 22:52:38,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-31 22:52:38,777 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:52:38,777 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:52:38,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 22:52:38,778 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:52:38,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:52:38,778 INFO L85 PathProgramCache]: Analyzing trace with hash -819930279, now seen corresponding path program 2 times [2022-01-31 22:52:38,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:52:38,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1014965680] [2022-01-31 22:52:38,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:52:38,780 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:52:38,780 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:52:38,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:52:38,781 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:52:38,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:52:38,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:52:38,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:52:38,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:52:38,862 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:52:38,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1014965680] [2022-01-31 22:52:38,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1014965680] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:52:38,862 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:52:38,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 22:52:38,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493002369] [2022-01-31 22:52:38,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:52:38,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 22:52:38,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:52:38,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 22:52:38,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 22:52:38,864 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 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 22:52:38,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:52:38,919 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2022-01-31 22:52:38,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 22:52:38,920 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 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 22:52:38,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:52:38,920 INFO L225 Difference]: With dead ends: 24 [2022-01-31 22:52:38,921 INFO L226 Difference]: Without dead ends: 19 [2022-01-31 22:52:38,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-31 22:52:38,922 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 13 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 22:52:38,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 23 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 22:52:38,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-01-31 22:52:38,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2022-01-31 22:52:38,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 13 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:52:38,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2022-01-31 22:52:38,928 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2022-01-31 22:52:38,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:52:38,928 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2022-01-31 22:52:38,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 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 22:52:38,928 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2022-01-31 22:52:38,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-31 22:52:38,929 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:52:38,929 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:52:38,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 22:52:38,929 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:52:38,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:52:38,930 INFO L85 PathProgramCache]: Analyzing trace with hash -838622089, now seen corresponding path program 3 times [2022-01-31 22:52:38,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:52:38,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [422609108] [2022-01-31 22:52:38,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:52:38,932 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:52:38,932 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:52:38,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:52:38,933 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:52:38,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:52:38,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:52:38,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:52:38,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:52:38,985 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:52:38,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [422609108] [2022-01-31 22:52:38,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [422609108] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:52:38,985 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:52:38,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 22:52:38,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917120000] [2022-01-31 22:52:38,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:52:38,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 22:52:38,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:52:38,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 22:52:38,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-31 22:52:38,986 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:52:39,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:52:39,041 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2022-01-31 22:52:39,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 22:52:39,041 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-01-31 22:52:39,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:52:39,042 INFO L225 Difference]: With dead ends: 26 [2022-01-31 22:52:39,042 INFO L226 Difference]: Without dead ends: 21 [2022-01-31 22:52:39,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-01-31 22:52:39,043 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 15 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 22:52:39,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 23 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 22:52:39,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-01-31 22:52:39,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2022-01-31 22:52:39,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:52:39,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2022-01-31 22:52:39,047 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 17 [2022-01-31 22:52:39,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:52:39,047 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2022-01-31 22:52:39,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:52:39,047 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2022-01-31 22:52:39,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-31 22:52:39,048 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:52:39,048 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:52:39,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 22:52:39,048 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:52:39,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:52:39,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1621582315, now seen corresponding path program 4 times [2022-01-31 22:52:39,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:52:39,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1224927375] [2022-01-31 22:52:39,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:52:39,050 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:52:39,050 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:52:39,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:52:39,051 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:52:39,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:52:39,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:52:39,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:52:39,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:52:39,098 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:52:39,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1224927375] [2022-01-31 22:52:39,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1224927375] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:52:39,099 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:52:39,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 22:52:39,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674022321] [2022-01-31 22:52:39,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:52:39,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 22:52:39,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:52:39,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 22:52:39,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 22:52:39,100 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:52:39,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:52:39,196 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2022-01-31 22:52:39,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 22:52:39,196 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-01-31 22:52:39,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:52:39,197 INFO L225 Difference]: With dead ends: 28 [2022-01-31 22:52:39,197 INFO L226 Difference]: Without dead ends: 23 [2022-01-31 22:52:39,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2022-01-31 22:52:39,198 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 17 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 22:52:39,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 23 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 22:52:39,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-01-31 22:52:39,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2022-01-31 22:52:39,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:52:39,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2022-01-31 22:52:39,202 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 19 [2022-01-31 22:52:39,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:52:39,202 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2022-01-31 22:52:39,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:52:39,202 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2022-01-31 22:52:39,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-31 22:52:39,203 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:52:39,203 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:52:39,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 22:52:39,203 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:52:39,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:52:39,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1867884595, now seen corresponding path program 5 times [2022-01-31 22:52:39,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:52:39,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2034174891] [2022-01-31 22:52:39,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:52:39,205 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:52:39,205 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:52:39,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:52:39,206 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:52:39,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:52:39,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:52:39,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:52:39,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:52:39,281 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:52:39,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2034174891] [2022-01-31 22:52:39,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2034174891] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:52:39,281 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:52:39,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 22:52:39,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492903309] [2022-01-31 22:52:39,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:52:39,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 22:52:39,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:52:39,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 22:52:39,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-31 22:52:39,282 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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 22:52:39,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:52:39,356 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2022-01-31 22:52:39,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 22:52:39,356 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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 21 [2022-01-31 22:52:39,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:52:39,357 INFO L225 Difference]: With dead ends: 30 [2022-01-31 22:52:39,357 INFO L226 Difference]: Without dead ends: 25 [2022-01-31 22:52:39,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2022-01-31 22:52:39,358 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 19 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 22:52:39,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 28 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 22:52:39,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-01-31 22:52:39,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-01-31 22:52:39,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 19 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:52:39,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2022-01-31 22:52:39,362 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 21 [2022-01-31 22:52:39,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:52:39,362 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2022-01-31 22:52:39,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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 22:52:39,363 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2022-01-31 22:52:39,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-31 22:52:39,363 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:52:39,363 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:52:39,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 22:52:39,363 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:52:39,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:52:39,364 INFO L85 PathProgramCache]: Analyzing trace with hash 876126929, now seen corresponding path program 6 times [2022-01-31 22:52:39,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:52:39,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2118183633] [2022-01-31 22:52:39,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:52:39,365 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:52:39,365 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:52:39,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:52:39,366 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:52:39,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:52:39,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:52:39,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:52:39,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:52:39,427 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:52:39,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2118183633] [2022-01-31 22:52:39,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2118183633] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:52:39,428 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:52:39,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 22:52:39,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903506727] [2022-01-31 22:52:39,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:52:39,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 22:52:39,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:52:39,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 22:52:39,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-01-31 22:52:39,429 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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 22:52:39,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:52:39,503 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2022-01-31 22:52:39,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 22:52:39,504 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-01-31 22:52:39,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:52:39,505 INFO L225 Difference]: With dead ends: 32 [2022-01-31 22:52:39,505 INFO L226 Difference]: Without dead ends: 27 [2022-01-31 22:52:39,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2022-01-31 22:52:39,506 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 21 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 22:52:39,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 18 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 22:52:39,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-31 22:52:39,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-01-31 22:52:39,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 21 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:52:39,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2022-01-31 22:52:39,512 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 23 [2022-01-31 22:52:39,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:52:39,512 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2022-01-31 22:52:39,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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 22:52:39,512 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2022-01-31 22:52:39,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-31 22:52:39,513 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:52:39,513 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:52:39,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 22:52:39,513 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:52:39,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:52:39,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1279749615, now seen corresponding path program 7 times [2022-01-31 22:52:39,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:52:39,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1642908182] [2022-01-31 22:52:39,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:52:39,516 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:52:39,516 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:52:39,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:52:39,517 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:52:39,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:52:39,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:52:39,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:52:39,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:52:39,598 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:52:39,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1642908182] [2022-01-31 22:52:39,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1642908182] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:52:39,599 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:52:39,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 22:52:39,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600218020] [2022-01-31 22:52:39,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:52:39,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 22:52:39,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:52:39,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 22:52:39,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2022-01-31 22:52:39,600 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 22:52:39,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:52:39,684 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2022-01-31 22:52:39,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 22:52:39,684 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-01-31 22:52:39,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:52:39,685 INFO L225 Difference]: With dead ends: 34 [2022-01-31 22:52:39,685 INFO L226 Difference]: Without dead ends: 29 [2022-01-31 22:52:39,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2022-01-31 22:52:39,686 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 23 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 22:52:39,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 18 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 22:52:39,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-31 22:52:39,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-01-31 22:52:39,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:52:39,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2022-01-31 22:52:39,691 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 25 [2022-01-31 22:52:39,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:52:39,691 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2022-01-31 22:52:39,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 22:52:39,691 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2022-01-31 22:52:39,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-31 22:52:39,692 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:52:39,692 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:52:39,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 22:52:39,692 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:52:39,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:52:39,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1680873075, now seen corresponding path program 8 times [2022-01-31 22:52:39,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:52:39,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1122175792] [2022-01-31 22:52:39,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:52:39,694 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:52:39,694 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:52:39,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:52:39,695 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:52:39,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:52:39,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:52:39,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:52:39,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:52:39,765 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:52:39,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1122175792] [2022-01-31 22:52:39,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1122175792] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:52:39,765 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:52:39,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 22:52:39,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189323137] [2022-01-31 22:52:39,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:52:39,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 22:52:39,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:52:39,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 22:52:39,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-01-31 22:52:39,766 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 22:52:39,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:52:39,858 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2022-01-31 22:52:39,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 22:52:39,858 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 27 [2022-01-31 22:52:39,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:52:39,859 INFO L225 Difference]: With dead ends: 36 [2022-01-31 22:52:39,859 INFO L226 Difference]: Without dead ends: 31 [2022-01-31 22:52:39,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2022-01-31 22:52:39,860 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 25 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 22:52:39,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 28 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 22:52:39,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-01-31 22:52:39,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2022-01-31 22:52:39,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:52:39,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2022-01-31 22:52:39,864 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 27 [2022-01-31 22:52:39,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:52:39,864 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2022-01-31 22:52:39,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 22:52:39,865 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2022-01-31 22:52:39,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-31 22:52:39,865 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:52:39,865 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:52:39,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 22:52:39,866 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:52:39,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:52:39,866 INFO L85 PathProgramCache]: Analyzing trace with hash 724039083, now seen corresponding path program 9 times [2022-01-31 22:52:39,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:52:39,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [855419850] [2022-01-31 22:52:39,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:52:39,868 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:52:39,868 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:52:39,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:52:39,869 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:52:39,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:52:39,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:52:39,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:52:39,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:52:39,946 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:52:39,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [855419850] [2022-01-31 22:52:39,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [855419850] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:52:39,946 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:52:39,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 22:52:39,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953515173] [2022-01-31 22:52:39,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:52:39,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 22:52:39,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:52:39,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 22:52:39,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2022-01-31 22:52:39,947 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:52:40,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:52:40,062 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2022-01-31 22:52:40,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 22:52:40,063 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-01-31 22:52:40,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:52:40,063 INFO L225 Difference]: With dead ends: 38 [2022-01-31 22:52:40,063 INFO L226 Difference]: Without dead ends: 33 [2022-01-31 22:52:40,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2022-01-31 22:52:40,064 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 27 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 22:52:40,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 23 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 22:52:40,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-01-31 22:52:40,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2022-01-31 22:52:40,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:52:40,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2022-01-31 22:52:40,070 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 29 [2022-01-31 22:52:40,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:52:40,070 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2022-01-31 22:52:40,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:52:40,070 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2022-01-31 22:52:40,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-31 22:52:40,071 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:52:40,071 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:52:40,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 22:52:40,071 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:52:40,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:52:40,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1152217673, now seen corresponding path program 10 times [2022-01-31 22:52:40,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:52:40,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1004986961] [2022-01-31 22:52:40,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:52:40,074 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:52:40,074 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:52:40,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:52:40,075 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:52:40,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:52:40,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:52:40,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:52:40,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:52:40,162 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:52:40,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1004986961] [2022-01-31 22:52:40,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1004986961] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:52:40,162 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:52:40,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 22:52:40,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067857193] [2022-01-31 22:52:40,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:52:40,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 22:52:40,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:52:40,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 22:52:40,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-01-31 22:52:40,163 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 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 22:52:40,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:52:40,306 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2022-01-31 22:52:40,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 22:52:40,306 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-01-31 22:52:40,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:52:40,308 INFO L225 Difference]: With dead ends: 40 [2022-01-31 22:52:40,308 INFO L226 Difference]: Without dead ends: 35 [2022-01-31 22:52:40,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2022-01-31 22:52:40,309 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 29 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 22:52:40,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 38 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 22:52:40,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-01-31 22:52:40,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2022-01-31 22:52:40,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 29 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:52:40,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2022-01-31 22:52:40,324 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 31 [2022-01-31 22:52:40,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:52:40,326 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2022-01-31 22:52:40,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 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 22:52:40,326 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2022-01-31 22:52:40,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-31 22:52:40,330 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:52:40,330 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:52:40,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-31 22:52:40,330 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:52:40,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:52:40,331 INFO L85 PathProgramCache]: Analyzing trace with hash 314982247, now seen corresponding path program 11 times [2022-01-31 22:52:40,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:52:40,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [921081166] [2022-01-31 22:52:40,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:52:40,333 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:52:40,333 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:52:40,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:52:40,335 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:52:40,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:52:40,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:52:40,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:52:40,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:52:40,452 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:52:40,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [921081166] [2022-01-31 22:52:40,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [921081166] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:52:40,452 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:52:40,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 22:52:40,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889530532] [2022-01-31 22:52:40,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:52:40,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 22:52:40,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:52:40,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 22:52:40,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2022-01-31 22:52:40,453 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 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 22:52:40,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:52:40,592 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2022-01-31 22:52:40,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 22:52:40,593 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-01-31 22:52:40,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:52:40,593 INFO L225 Difference]: With dead ends: 42 [2022-01-31 22:52:40,593 INFO L226 Difference]: Without dead ends: 37 [2022-01-31 22:52:40,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2022-01-31 22:52:40,594 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 31 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 22:52:40,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 28 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 22:52:40,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-31 22:52:40,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2022-01-31 22:52:40,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:52:40,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2022-01-31 22:52:40,599 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 33 [2022-01-31 22:52:40,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:52:40,599 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2022-01-31 22:52:40,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 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 22:52:40,599 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2022-01-31 22:52:40,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-31 22:52:40,599 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:52:40,599 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:52:40,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 22:52:40,600 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:52:40,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:52:40,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1109377787, now seen corresponding path program 12 times [2022-01-31 22:52:40,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:52:40,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [252388422] [2022-01-31 22:52:40,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:52:40,601 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:52:40,601 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:52:40,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:52:40,602 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:52:40,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:52:40,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:52:40,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:52:40,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:52:40,709 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:52:40,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [252388422] [2022-01-31 22:52:40,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [252388422] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:52:40,709 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:52:40,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 22:52:40,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600189579] [2022-01-31 22:52:40,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:52:40,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 22:52:40,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:52:40,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 22:52:40,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2022-01-31 22:52:40,710 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 15 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:52:40,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:52:40,869 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2022-01-31 22:52:40,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 22:52:40,870 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 15 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-01-31 22:52:40,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:52:40,870 INFO L225 Difference]: With dead ends: 44 [2022-01-31 22:52:40,870 INFO L226 Difference]: Without dead ends: 39 [2022-01-31 22:52:40,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=315, Invalid=497, Unknown=0, NotChecked=0, Total=812 [2022-01-31 22:52:40,871 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 22:52:40,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 28 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 22:52:40,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-01-31 22:52:40,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2022-01-31 22:52:40,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 33 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:52:40,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2022-01-31 22:52:40,875 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 35 [2022-01-31 22:52:40,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:52:40,875 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2022-01-31 22:52:40,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 15 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:52:40,876 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2022-01-31 22:52:40,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-31 22:52:40,876 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:52:40,876 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:52:40,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-31 22:52:40,876 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:52:40,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:52:40,877 INFO L85 PathProgramCache]: Analyzing trace with hash 175196963, now seen corresponding path program 13 times [2022-01-31 22:52:40,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:52:40,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [633178763] [2022-01-31 22:52:40,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:52:40,878 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:52:40,878 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:52:40,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:52:40,879 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:52:40,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:52:40,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:52:40,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:52:40,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:52:40,994 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:52:40,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [633178763] [2022-01-31 22:52:40,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [633178763] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:52:40,994 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:52:40,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 22:52:40,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824713860] [2022-01-31 22:52:40,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:52:40,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 22:52:40,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:52:40,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 22:52:40,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2022-01-31 22:52:40,995 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:52:41,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:52:41,152 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2022-01-31 22:52:41,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 22:52:41,153 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-01-31 22:52:41,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:52:41,153 INFO L225 Difference]: With dead ends: 46 [2022-01-31 22:52:41,153 INFO L226 Difference]: Without dead ends: 41 [2022-01-31 22:52:41,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2022-01-31 22:52:41,154 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 35 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 22:52:41,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 28 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 22:52:41,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-01-31 22:52:41,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2022-01-31 22:52:41,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 35 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:52:41,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2022-01-31 22:52:41,159 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 37 [2022-01-31 22:52:41,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:52:41,159 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2022-01-31 22:52:41,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:52:41,159 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2022-01-31 22:52:41,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-31 22:52:41,159 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:52:41,159 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:52:41,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-31 22:52:41,159 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:52:41,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:52:41,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1995917761, now seen corresponding path program 14 times [2022-01-31 22:52:41,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:52:41,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1734243034] [2022-01-31 22:52:41,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:52:41,161 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:52:41,161 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:52:41,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:52:41,162 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:52:41,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:52:41,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:52:41,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:52:41,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:52:41,288 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:52:41,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1734243034] [2022-01-31 22:52:41,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1734243034] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:52:41,288 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:52:41,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 22:52:41,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173196937] [2022-01-31 22:52:41,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:52:41,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 22:52:41,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:52:41,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 22:52:41,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-01-31 22:52:41,290 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:52:41,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:52:41,461 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2022-01-31 22:52:41,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 22:52:41,461 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-01-31 22:52:41,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:52:41,462 INFO L225 Difference]: With dead ends: 48 [2022-01-31 22:52:41,462 INFO L226 Difference]: Without dead ends: 43 [2022-01-31 22:52:41,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=408, Invalid=648, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 22:52:41,463 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 37 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 22:52:41,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 23 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 22:52:41,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-01-31 22:52:41,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2022-01-31 22:52:41,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.027027027027027) internal successors, (38), 37 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:52:41,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2022-01-31 22:52:41,467 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 39 [2022-01-31 22:52:41,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:52:41,467 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2022-01-31 22:52:41,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:52:41,467 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2022-01-31 22:52:41,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-31 22:52:41,468 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:52:41,468 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:52:41,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-31 22:52:41,468 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:52:41,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:52:41,468 INFO L85 PathProgramCache]: Analyzing trace with hash -638052129, now seen corresponding path program 15 times [2022-01-31 22:52:41,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:52:41,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [860971762] [2022-01-31 22:52:41,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:52:41,470 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:52:41,470 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:52:41,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:52:41,470 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:52:41,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:52:41,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:52:41,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:52:41,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:52:41,604 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:52:41,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [860971762] [2022-01-31 22:52:41,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [860971762] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:52:41,605 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:52:41,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 22:52:41,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277652045] [2022-01-31 22:52:41,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:52:41,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 22:52:41,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:52:41,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 22:52:41,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2022-01-31 22:52:41,606 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:52:41,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:52:41,782 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2022-01-31 22:52:41,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 22:52:41,782 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-01-31 22:52:41,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:52:41,783 INFO L225 Difference]: With dead ends: 50 [2022-01-31 22:52:41,783 INFO L226 Difference]: Without dead ends: 45 [2022-01-31 22:52:41,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 22:52:41,784 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 39 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 22:52:41,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 23 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 22:52:41,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-01-31 22:52:41,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2022-01-31 22:52:41,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 39 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:52:41,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2022-01-31 22:52:41,788 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 41 [2022-01-31 22:52:41,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:52:41,789 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2022-01-31 22:52:41,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:52:41,789 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2022-01-31 22:52:41,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-31 22:52:41,789 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:52:41,789 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:52:41,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-31 22:52:41,789 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:52:41,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:52:41,790 INFO L85 PathProgramCache]: Analyzing trace with hash -2147379075, now seen corresponding path program 16 times [2022-01-31 22:52:41,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:52:41,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [509156322] [2022-01-31 22:52:41,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:52:41,791 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:52:41,791 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:52:41,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:52:41,792 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:52:41,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:52:41,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:52:41,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:52:41,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:52:41,939 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:52:41,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [509156322] [2022-01-31 22:52:41,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [509156322] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:52:41,940 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:52:41,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 22:52:41,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455917254] [2022-01-31 22:52:41,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:52:41,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 22:52:41,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:52:41,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 22:52:41,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2022-01-31 22:52:41,941 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 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 22:52:42,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:52:42,153 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2022-01-31 22:52:42,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 22:52:42,154 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2022-01-31 22:52:42,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:52:42,154 INFO L225 Difference]: With dead ends: 52 [2022-01-31 22:52:42,154 INFO L226 Difference]: Without dead ends: 47 [2022-01-31 22:52:42,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=513, Invalid=819, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 22:52:42,155 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 41 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 22:52:42,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 38 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 22:52:42,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-01-31 22:52:42,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2022-01-31 22:52:42,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.024390243902439) internal successors, (42), 41 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:52:42,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2022-01-31 22:52:42,160 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 43 [2022-01-31 22:52:42,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:52:42,160 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2022-01-31 22:52:42,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 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 22:52:42,160 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2022-01-31 22:52:42,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-31 22:52:42,160 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:52:42,160 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:52:42,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-31 22:52:42,160 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:52:42,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:52:42,161 INFO L85 PathProgramCache]: Analyzing trace with hash -911628133, now seen corresponding path program 17 times [2022-01-31 22:52:42,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:52:42,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [776455756] [2022-01-31 22:52:42,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:52:42,162 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:52:42,162 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:52:42,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:52:42,167 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:52:42,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:52:42,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:52:42,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:52:42,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:52:42,350 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:52:42,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [776455756] [2022-01-31 22:52:42,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [776455756] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:52:42,351 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:52:42,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 22:52:42,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894252502] [2022-01-31 22:52:42,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:52:42,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 22:52:42,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:52:42,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 22:52:42,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2022-01-31 22:52:42,352 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 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 22:52:42,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:52:42,570 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2022-01-31 22:52:42,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 22:52:42,570 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 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 45 [2022-01-31 22:52:42,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:52:42,571 INFO L225 Difference]: With dead ends: 54 [2022-01-31 22:52:42,571 INFO L226 Difference]: Without dead ends: 49 [2022-01-31 22:52:42,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=570, Invalid=912, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 22:52:42,572 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 43 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 22:52:42,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 33 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 22:52:42,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-01-31 22:52:42,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2022-01-31 22:52:42,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.0232558139534884) internal successors, (44), 43 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:52:42,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2022-01-31 22:52:42,577 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 45 [2022-01-31 22:52:42,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:52:42,577 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2022-01-31 22:52:42,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 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 22:52:42,577 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2022-01-31 22:52:42,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-31 22:52:42,577 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:52:42,577 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:52:42,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-31 22:52:42,577 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:52:42,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:52:42,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1234053433, now seen corresponding path program 18 times [2022-01-31 22:52:42,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:52:42,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [610619744] [2022-01-31 22:52:42,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:52:42,579 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:52:42,579 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:52:42,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:52:42,580 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:52:42,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:52:42,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:52:42,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:52:42,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:52:42,751 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:52:42,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [610619744] [2022-01-31 22:52:42,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [610619744] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:52:42,751 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:52:42,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 22:52:42,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511270326] [2022-01-31 22:52:42,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:52:42,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 22:52:42,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:52:42,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 22:52:42,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2022-01-31 22:52:42,752 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 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 22:52:42,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:52:42,978 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2022-01-31 22:52:42,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 22:52:42,979 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 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 47 [2022-01-31 22:52:42,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:52:42,979 INFO L225 Difference]: With dead ends: 56 [2022-01-31 22:52:42,979 INFO L226 Difference]: Without dead ends: 51 [2022-01-31 22:52:42,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 22:52:42,980 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 45 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 22:52:42,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 38 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 22:52:42,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-01-31 22:52:42,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-01-31 22:52:42,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.0222222222222221) internal successors, (46), 45 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:52:42,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2022-01-31 22:52:42,985 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 47 [2022-01-31 22:52:42,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:52:42,985 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2022-01-31 22:52:42,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 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 22:52:42,985 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2022-01-31 22:52:42,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-01-31 22:52:42,985 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:52:42,986 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:52:42,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-31 22:52:42,986 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:52:42,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:52:42,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1649736279, now seen corresponding path program 19 times [2022-01-31 22:52:42,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:52:42,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [747371115] [2022-01-31 22:52:42,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:52:42,987 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:52:42,988 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:52:42,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:52:42,988 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:52:42,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:52:43,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:52:43,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:52:43,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:52:43,169 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:52:43,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [747371115] [2022-01-31 22:52:43,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [747371115] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:52:43,169 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:52:43,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 22:52:43,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11851110] [2022-01-31 22:52:43,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:52:43,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 22:52:43,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:52:43,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 22:52:43,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2022-01-31 22:52:43,170 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 22 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:52:43,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:52:43,441 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2022-01-31 22:52:43,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 22:52:43,441 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 22 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2022-01-31 22:52:43,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:52:43,441 INFO L225 Difference]: With dead ends: 58 [2022-01-31 22:52:43,441 INFO L226 Difference]: Without dead ends: 53 [2022-01-31 22:52:43,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=693, Invalid=1113, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 22:52:43,442 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 47 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:52:43,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 38 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:52:43,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-01-31 22:52:43,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2022-01-31 22:52:43,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.0212765957446808) internal successors, (48), 47 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:52:43,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2022-01-31 22:52:43,448 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 49 [2022-01-31 22:52:43,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:52:43,448 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2022-01-31 22:52:43,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 22 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:52:43,448 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2022-01-31 22:52:43,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-31 22:52:43,448 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:52:43,448 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:52:43,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-31 22:52:43,449 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:52:43,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:52:43,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1688992757, now seen corresponding path program 20 times [2022-01-31 22:52:43,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:52:43,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [194026196] [2022-01-31 22:52:43,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:52:43,450 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:52:43,450 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:52:43,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:52:43,451 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:52:43,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:52:43,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:52:43,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:52:43,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:52:43,678 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:52:43,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [194026196] [2022-01-31 22:52:43,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [194026196] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:52:43,678 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:52:43,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 22:52:43,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266560831] [2022-01-31 22:52:43,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:52:43,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 22:52:43,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:52:43,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 22:52:43,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2022-01-31 22:52:43,679 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:52:43,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:52:43,975 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2022-01-31 22:52:43,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 22:52:43,975 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-01-31 22:52:43,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:52:43,976 INFO L225 Difference]: With dead ends: 60 [2022-01-31 22:52:43,976 INFO L226 Difference]: Without dead ends: 55 [2022-01-31 22:52:43,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=759, Invalid=1221, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 22:52:43,977 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 49 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 22:52:43,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 28 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 22:52:43,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-01-31 22:52:43,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2022-01-31 22:52:43,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.0204081632653061) internal successors, (50), 49 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:52:43,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2022-01-31 22:52:43,982 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 51 [2022-01-31 22:52:43,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:52:43,982 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2022-01-31 22:52:43,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:52:43,982 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2022-01-31 22:52:43,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-31 22:52:43,983 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:52:43,983 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:52:43,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-31 22:52:43,983 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:52:43,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:52:43,983 INFO L85 PathProgramCache]: Analyzing trace with hash 759762451, now seen corresponding path program 21 times [2022-01-31 22:52:43,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:52:43,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [5315378] [2022-01-31 22:52:43,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:52:43,985 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:52:43,985 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:52:43,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:52:43,985 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:52:43,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:52:44,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:52:44,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:52:44,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:52:44,200 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:52:44,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [5315378] [2022-01-31 22:52:44,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [5315378] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:52:44,200 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:52:44,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 22:52:44,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874151830] [2022-01-31 22:52:44,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:52:44,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 22:52:44,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:52:44,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 22:52:44,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2022-01-31 22:52:44,201 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 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 22:52:44,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:52:44,472 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2022-01-31 22:52:44,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 22:52:44,472 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 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 53 [2022-01-31 22:52:44,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:52:44,472 INFO L225 Difference]: With dead ends: 62 [2022-01-31 22:52:44,472 INFO L226 Difference]: Without dead ends: 57 [2022-01-31 22:52:44,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=828, Invalid=1334, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 22:52:44,474 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 51 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 22:52:44,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 28 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 22:52:44,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-01-31 22:52:44,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2022-01-31 22:52:44,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.0196078431372548) internal successors, (52), 51 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:52:44,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2022-01-31 22:52:44,479 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 53 [2022-01-31 22:52:44,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:52:44,479 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2022-01-31 22:52:44,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 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 22:52:44,479 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2022-01-31 22:52:44,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-31 22:52:44,480 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:52:44,480 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:52:44,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-31 22:52:44,480 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:52:44,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:52:44,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1122635953, now seen corresponding path program 22 times [2022-01-31 22:52:44,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:52:44,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1634513471] [2022-01-31 22:52:44,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:52:44,481 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:52:44,482 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:52:44,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:52:44,482 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:52:44,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:52:44,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:52:44,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:52:44,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:52:44,721 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:52:44,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1634513471] [2022-01-31 22:52:44,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1634513471] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:52:44,722 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:52:44,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 22:52:44,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959408126] [2022-01-31 22:52:44,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:52:44,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 22:52:44,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:52:44,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 22:52:44,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-01-31 22:52:44,723 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:52:45,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:52:45,039 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2022-01-31 22:52:45,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 22:52:45,040 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-01-31 22:52:45,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:52:45,040 INFO L225 Difference]: With dead ends: 64 [2022-01-31 22:52:45,040 INFO L226 Difference]: Without dead ends: 59 [2022-01-31 22:52:45,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=900, Invalid=1452, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 22:52:45,042 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 53 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 22:52:45,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 33 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 22:52:45,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-01-31 22:52:45,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2022-01-31 22:52:45,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.0188679245283019) internal successors, (54), 53 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:52:45,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2022-01-31 22:52:45,049 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 55 [2022-01-31 22:52:45,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:52:45,049 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2022-01-31 22:52:45,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:52:45,050 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2022-01-31 22:52:45,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-31 22:52:45,050 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:52:45,050 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:52:45,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-31 22:52:45,050 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:52:45,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:52:45,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1951720399, now seen corresponding path program 23 times [2022-01-31 22:52:45,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:52:45,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1355019360] [2022-01-31 22:52:45,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:52:45,052 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:52:45,052 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:52:45,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:52:45,053 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:52:45,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:52:45,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:52:45,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:52:45,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:52:45,257 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:52:45,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1355019360] [2022-01-31 22:52:45,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1355019360] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:52:45,258 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:52:45,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 22:52:45,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667487962] [2022-01-31 22:52:45,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:52:45,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 22:52:45,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:52:45,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 22:52:45,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2022-01-31 22:52:45,259 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 26 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 22:52:45,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:52:45,580 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2022-01-31 22:52:45,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 22:52:45,580 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 26 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 57 [2022-01-31 22:52:45,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:52:45,580 INFO L225 Difference]: With dead ends: 66 [2022-01-31 22:52:45,580 INFO L226 Difference]: Without dead ends: 61 [2022-01-31 22:52:45,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=975, Invalid=1575, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 22:52:45,582 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 55 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 22:52:45,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 28 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 22:52:45,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-01-31 22:52:45,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2022-01-31 22:52:45,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.018181818181818) internal successors, (56), 55 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:52:45,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2022-01-31 22:52:45,587 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 57 [2022-01-31 22:52:45,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:52:45,588 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2022-01-31 22:52:45,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 26 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 22:52:45,588 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2022-01-31 22:52:45,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-31 22:52:45,588 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:52:45,588 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:52:45,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-31 22:52:45,588 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:52:45,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:52:45,589 INFO L85 PathProgramCache]: Analyzing trace with hash -162044051, now seen corresponding path program 24 times [2022-01-31 22:52:45,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:52:45,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1555960846] [2022-01-31 22:52:45,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:52:45,590 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:52:45,590 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:52:45,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:52:45,590 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:52:45,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:52:45,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:52:45,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:52:45,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:52:45,850 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:52:45,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1555960846] [2022-01-31 22:52:45,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1555960846] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:52:45,850 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:52:45,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 22:52:45,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955594704] [2022-01-31 22:52:45,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:52:45,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 22:52:45,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:52:45,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 22:52:45,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2022-01-31 22:52:45,851 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 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 22:52:46,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:52:46,254 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2022-01-31 22:52:46,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 22:52:46,254 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-01-31 22:52:46,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:52:46,255 INFO L225 Difference]: With dead ends: 68 [2022-01-31 22:52:46,255 INFO L226 Difference]: Without dead ends: 63 [2022-01-31 22:52:46,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1053, Invalid=1703, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 22:52:46,256 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 57 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:52:46,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 33 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:52:46,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-01-31 22:52:46,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2022-01-31 22:52:46,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.0175438596491229) internal successors, (58), 57 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:52:46,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2022-01-31 22:52:46,261 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 59 [2022-01-31 22:52:46,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:52:46,262 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2022-01-31 22:52:46,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 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 22:52:46,262 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2022-01-31 22:52:46,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-31 22:52:46,262 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:52:46,262 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:52:46,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-01-31 22:52:46,262 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:52:46,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:52:46,263 INFO L85 PathProgramCache]: Analyzing trace with hash 29850507, now seen corresponding path program 25 times [2022-01-31 22:52:46,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:52:46,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [399294956] [2022-01-31 22:52:46,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:52:46,264 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:52:46,264 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:52:46,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:52:46,265 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:52:46,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:52:46,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:52:46,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:52:46,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:52:46,572 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:52:46,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [399294956] [2022-01-31 22:52:46,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [399294956] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:52:46,572 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:52:46,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 22:52:46,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670815100] [2022-01-31 22:52:46,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:52:46,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 22:52:46,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:52:46,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 22:52:46,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2022-01-31 22:52:46,575 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 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 22:52:46,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:52:46,970 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2022-01-31 22:52:46,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 22:52:46,970 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 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 61 [2022-01-31 22:52:46,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:52:46,970 INFO L225 Difference]: With dead ends: 70 [2022-01-31 22:52:46,970 INFO L226 Difference]: Without dead ends: 65 [2022-01-31 22:52:46,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1134, Invalid=1836, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 22:52:46,972 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 59 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:52:46,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 33 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:52:46,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-01-31 22:52:46,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2022-01-31 22:52:46,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.0169491525423728) internal successors, (60), 59 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:52:46,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2022-01-31 22:52:46,978 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 61 [2022-01-31 22:52:46,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:52:46,978 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2022-01-31 22:52:46,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 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 22:52:46,978 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2022-01-31 22:52:46,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 22:52:46,978 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:52:46,978 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:52:46,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-01-31 22:52:46,979 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:52:46,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:52:46,979 INFO L85 PathProgramCache]: Analyzing trace with hash -243072983, now seen corresponding path program 26 times [2022-01-31 22:52:46,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:52:46,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [154995776] [2022-01-31 22:52:46,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:52:46,981 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:52:46,981 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:52:46,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:52:46,982 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:52:46,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:52:47,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:52:47,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:52:47,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:52:47,327 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:52:47,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [154995776] [2022-01-31 22:52:47,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [154995776] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:52:47,328 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:52:47,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 22:52:47,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352704628] [2022-01-31 22:52:47,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:52:47,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 22:52:47,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:52:47,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 22:52:47,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2022-01-31 22:52:47,329 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 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 22:52:47,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:52:47,600 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2022-01-31 22:52:47,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 22:52:47,600 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 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 63 [2022-01-31 22:52:47,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:52:47,601 INFO L225 Difference]: With dead ends: 72 [2022-01-31 22:52:47,601 INFO L226 Difference]: Without dead ends: 67 [2022-01-31 22:52:47,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1218, Invalid=1974, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 22:52:47,602 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 61 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 22:52:47,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 33 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 22:52:47,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-01-31 22:52:47,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2022-01-31 22:52:47,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 61 states have (on average 1.0163934426229508) internal successors, (62), 61 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:52:47,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2022-01-31 22:52:47,624 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 63 [2022-01-31 22:52:47,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:52:47,625 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2022-01-31 22:52:47,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 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 22:52:47,625 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2022-01-31 22:52:47,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-31 22:52:47,625 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:52:47,625 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:52:47,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-01-31 22:52:47,625 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:52:47,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:52:47,626 INFO L85 PathProgramCache]: Analyzing trace with hash -529541817, now seen corresponding path program 27 times [2022-01-31 22:52:47,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:52:47,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1494648168] [2022-01-31 22:52:47,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:52:47,627 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:52:47,627 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:52:47,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:52:47,628 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:52:47,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:52:47,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:52:47,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:52:47,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:52:47,948 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:52:47,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1494648168] [2022-01-31 22:52:47,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1494648168] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:52:47,948 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:52:47,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 22:52:47,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758985296] [2022-01-31 22:52:47,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:52:47,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 22:52:47,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:52:47,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 22:52:47,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2022-01-31 22:52:47,950 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 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 22:52:48,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:52:48,321 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2022-01-31 22:52:48,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 22:52:48,322 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 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 65 [2022-01-31 22:52:48,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:52:48,322 INFO L225 Difference]: With dead ends: 74 [2022-01-31 22:52:48,322 INFO L226 Difference]: Without dead ends: 69 [2022-01-31 22:52:48,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1305, Invalid=2117, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 22:52:48,324 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 63 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:52:48,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 38 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:52:48,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-01-31 22:52:48,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2022-01-31 22:52:48,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 63 states have (on average 1.0158730158730158) internal successors, (64), 63 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:52:48,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2022-01-31 22:52:48,330 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 65 [2022-01-31 22:52:48,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:52:48,331 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2022-01-31 22:52:48,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 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 22:52:48,331 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2022-01-31 22:52:48,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-31 22:52:48,331 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:52:48,331 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:52:48,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-01-31 22:52:48,331 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:52:48,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:52:48,332 INFO L85 PathProgramCache]: Analyzing trace with hash -948184347, now seen corresponding path program 28 times [2022-01-31 22:52:48,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:52:48,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1184730758] [2022-01-31 22:52:48,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:52:48,333 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:52:48,333 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:52:48,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:52:48,334 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:52:48,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:52:48,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:52:48,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:52:48,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:52:48,667 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:52:48,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1184730758] [2022-01-31 22:52:48,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1184730758] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:52:48,668 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:52:48,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 22:52:48,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511292905] [2022-01-31 22:52:48,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:52:48,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 22:52:48,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:52:48,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 22:52:48,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2022-01-31 22:52:48,669 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand has 32 states, 32 states have (on average 1.96875) internal successors, (63), 31 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 22:52:49,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:52:49,035 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2022-01-31 22:52:49,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 22:52:49,035 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.96875) internal successors, (63), 31 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 67 [2022-01-31 22:52:49,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:52:49,037 INFO L225 Difference]: With dead ends: 76 [2022-01-31 22:52:49,037 INFO L226 Difference]: Without dead ends: 71 [2022-01-31 22:52:49,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1395, Invalid=2265, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 22:52:49,039 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 65 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 22:52:49,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 18 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 22:52:49,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-01-31 22:52:49,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2022-01-31 22:52:49,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 65 states have (on average 1.0153846153846153) internal successors, (66), 65 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:52:49,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2022-01-31 22:52:49,066 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 67 [2022-01-31 22:52:49,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:52:49,066 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2022-01-31 22:52:49,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.96875) internal successors, (63), 31 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 22:52:49,066 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2022-01-31 22:52:49,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-31 22:52:49,066 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:52:49,066 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:52:49,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-01-31 22:52:49,066 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:52:49,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:52:49,067 INFO L85 PathProgramCache]: Analyzing trace with hash 463270147, now seen corresponding path program 29 times [2022-01-31 22:52:49,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:52:49,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1855984028] [2022-01-31 22:52:49,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:52:49,068 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:52:49,068 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:52:49,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:52:49,069 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:52:49,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:52:49,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:52:49,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:52:49,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:52:49,383 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:52:49,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1855984028] [2022-01-31 22:52:49,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1855984028] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:52:49,383 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:52:49,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 22:52:49,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75647734] [2022-01-31 22:52:49,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:52:49,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 22:52:49,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:52:49,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 22:52:49,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 22:52:49,385 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:52:49,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:52:49,755 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2022-01-31 22:52:49,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 22:52:49,755 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-01-31 22:52:49,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:52:49,756 INFO L225 Difference]: With dead ends: 78 [2022-01-31 22:52:49,756 INFO L226 Difference]: Without dead ends: 73 [2022-01-31 22:52:49,758 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1488, Invalid=2418, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 22:52:49,759 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 67 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:52:49,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 23 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:52:49,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-01-31 22:52:49,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2022-01-31 22:52:49,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 67 states have (on average 1.0149253731343284) internal successors, (68), 67 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:52:49,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2022-01-31 22:52:49,771 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 69 [2022-01-31 22:52:49,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:52:49,771 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2022-01-31 22:52:49,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:52:49,771 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2022-01-31 22:52:49,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-31 22:52:49,772 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:52:49,772 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:52:49,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-01-31 22:52:49,772 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:52:49,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:52:49,772 INFO L85 PathProgramCache]: Analyzing trace with hash -338626655, now seen corresponding path program 30 times [2022-01-31 22:52:49,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:52:49,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1609666365] [2022-01-31 22:52:49,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:52:49,773 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:52:49,774 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:52:49,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:52:49,774 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:52:49,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:52:50,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:52:50,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:52:50,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:52:50,126 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:52:50,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1609666365] [2022-01-31 22:52:50,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1609666365] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:52:50,127 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:52:50,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 22:52:50,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406060355] [2022-01-31 22:52:50,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:52:50,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 22:52:50,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:52:50,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 22:52:50,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 22:52:50,141 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand has 34 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 33 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 22:52:50,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:52:50,577 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2022-01-31 22:52:50,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 22:52:50,577 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 33 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 71 [2022-01-31 22:52:50,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:52:50,580 INFO L225 Difference]: With dead ends: 80 [2022-01-31 22:52:50,580 INFO L226 Difference]: Without dead ends: 75 [2022-01-31 22:52:50,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1584, Invalid=2576, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 22:52:50,583 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 69 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:52:50,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 28 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:52:50,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-01-31 22:52:50,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2022-01-31 22:52:50,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 69 states have (on average 1.0144927536231885) internal successors, (70), 69 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:52:50,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2022-01-31 22:52:50,598 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 71 [2022-01-31 22:52:50,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:52:50,598 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2022-01-31 22:52:50,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 33 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 22:52:50,598 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2022-01-31 22:52:50,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-31 22:52:50,600 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:52:50,600 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:52:50,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-01-31 22:52:50,601 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:52:50,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:52:50,601 INFO L85 PathProgramCache]: Analyzing trace with hash 2132659903, now seen corresponding path program 31 times [2022-01-31 22:52:50,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:52:50,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1363882672] [2022-01-31 22:52:50,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:52:50,603 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:52:50,603 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:52:50,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:52:50,604 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:52:50,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:52:50,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:52:50,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:52:50,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:52:50,976 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:52:50,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1363882672] [2022-01-31 22:52:50,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1363882672] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:52:50,976 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:52:50,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 22:52:50,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861386917] [2022-01-31 22:52:50,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:52:50,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 22:52:50,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:52:50,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 22:52:50,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 22:52:50,979 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand has 35 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 34 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 22:52:51,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:52:51,362 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2022-01-31 22:52:51,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 22:52:51,362 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 34 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 73 [2022-01-31 22:52:51,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:52:51,364 INFO L225 Difference]: With dead ends: 82 [2022-01-31 22:52:51,364 INFO L226 Difference]: Without dead ends: 77 [2022-01-31 22:52:51,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1683, Invalid=2739, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 22:52:51,365 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 71 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:52:51,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 23 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:52:51,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-01-31 22:52:51,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2022-01-31 22:52:51,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 71 states have (on average 1.0140845070422535) internal successors, (72), 71 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:52:51,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2022-01-31 22:52:51,374 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 73 [2022-01-31 22:52:51,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:52:51,374 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2022-01-31 22:52:51,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 34 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 22:52:51,374 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2022-01-31 22:52:51,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-31 22:52:51,374 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:52:51,374 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:52:51,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-01-31 22:52:51,375 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:52:51,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:52:51,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1922127453, now seen corresponding path program 32 times [2022-01-31 22:52:51,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:52:51,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [405988563] [2022-01-31 22:52:51,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:52:51,376 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:52:51,377 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:52:51,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:52:51,377 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:52:51,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:52:51,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:52:51,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:52:51,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:52:51,717 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:52:51,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [405988563] [2022-01-31 22:52:51,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [405988563] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:52:51,718 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:52:51,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 22:52:51,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381790792] [2022-01-31 22:52:51,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:52:51,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 22:52:51,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:52:51,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 22:52:51,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 22:52:51,719 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 35 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 22:52:52,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:52:52,137 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2022-01-31 22:52:52,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 22:52:52,137 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 35 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 75 [2022-01-31 22:52:52,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:52:52,138 INFO L225 Difference]: With dead ends: 84 [2022-01-31 22:52:52,138 INFO L226 Difference]: Without dead ends: 79 [2022-01-31 22:52:52,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1785, Invalid=2907, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 22:52:52,139 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 73 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:52:52,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 28 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:52:52,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-01-31 22:52:52,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2022-01-31 22:52:52,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 73 states have (on average 1.0136986301369864) internal successors, (74), 73 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:52:52,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2022-01-31 22:52:52,148 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 75 [2022-01-31 22:52:52,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:52:52,148 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2022-01-31 22:52:52,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 35 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 22:52:52,148 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2022-01-31 22:52:52,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-31 22:52:52,148 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:52:52,148 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:52:52,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-01-31 22:52:52,149 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:52:52,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:52:52,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1463905915, now seen corresponding path program 33 times [2022-01-31 22:52:52,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:52:52,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1160057053] [2022-01-31 22:52:52,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:52:52,150 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:52:52,150 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:52:52,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:52:52,151 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:52:52,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:52:52,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:52:52,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:52:52,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:52:52,592 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:52:52,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1160057053] [2022-01-31 22:52:52,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1160057053] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:52:52,592 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:52:52,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 22:52:52,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433892421] [2022-01-31 22:52:52,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:52:52,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 22:52:52,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:52:52,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 22:52:52,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 22:52:52,594 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 22:52:53,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:52:53,114 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2022-01-31 22:52:53,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 22:52:53,114 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 77 [2022-01-31 22:52:53,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:52:53,115 INFO L225 Difference]: With dead ends: 86 [2022-01-31 22:52:53,115 INFO L226 Difference]: Without dead ends: 81 [2022-01-31 22:52:53,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1890, Invalid=3080, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 22:52:53,116 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 75 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:52:53,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 38 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:52:53,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-01-31 22:52:53,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2022-01-31 22:52:53,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 75 states have (on average 1.0133333333333334) internal successors, (76), 75 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:52:53,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2022-01-31 22:52:53,126 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 77 [2022-01-31 22:52:53,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:52:53,126 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2022-01-31 22:52:53,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 22:52:53,126 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2022-01-31 22:52:53,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-31 22:52:53,126 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:52:53,127 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:52:53,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-01-31 22:52:53,127 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:52:53,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:52:53,127 INFO L85 PathProgramCache]: Analyzing trace with hash -800327911, now seen corresponding path program 34 times [2022-01-31 22:52:53,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:52:53,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [608033083] [2022-01-31 22:52:53,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:52:53,129 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:52:53,129 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:52:53,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:52:53,129 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:52:53,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:52:53,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:52:53,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:52:53,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:52:53,470 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:52:53,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [608033083] [2022-01-31 22:52:53,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [608033083] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:52:53,470 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:52:53,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 22:52:53,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477599925] [2022-01-31 22:52:53,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:52:53,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 22:52:53,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:52:53,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 22:52:53,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 22:52:53,471 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand has 38 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 37 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 22:52:53,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:52:53,980 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2022-01-31 22:52:53,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 22:52:53,980 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 37 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 79 [2022-01-31 22:52:53,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:52:53,981 INFO L225 Difference]: With dead ends: 88 [2022-01-31 22:52:53,981 INFO L226 Difference]: Without dead ends: 83 [2022-01-31 22:52:53,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1998, Invalid=3258, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 22:52:53,982 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 77 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:52:53,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 23 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:52:53,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-01-31 22:52:53,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2022-01-31 22:52:53,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 77 states have (on average 1.0129870129870129) internal successors, (78), 77 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:52:53,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2022-01-31 22:52:53,992 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 79 [2022-01-31 22:52:53,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:52:53,992 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2022-01-31 22:52:53,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 37 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 22:52:53,992 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2022-01-31 22:52:53,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-01-31 22:52:53,993 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:52:53,993 INFO L514 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:52:53,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-01-31 22:52:53,993 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:52:53,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:52:53,993 INFO L85 PathProgramCache]: Analyzing trace with hash 819384375, now seen corresponding path program 35 times [2022-01-31 22:52:53,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:52:53,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1398374201] [2022-01-31 22:52:53,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:52:53,995 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:52:53,995 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:52:53,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:52:53,996 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:52:54,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:52:54,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:52:54,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:52:54,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:52:54,314 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:52:54,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1398374201] [2022-01-31 22:52:54,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1398374201] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:52:54,314 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:52:54,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-01-31 22:52:54,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589215191] [2022-01-31 22:52:54,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:52:54,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 22:52:54,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:52:54,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 22:52:54,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 22:52:54,316 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 38 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:52:54,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:52:54,734 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2022-01-31 22:52:54,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 22:52:54,734 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 38 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2022-01-31 22:52:54,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:52:54,736 INFO L225 Difference]: With dead ends: 90 [2022-01-31 22:52:54,736 INFO L226 Difference]: Without dead ends: 85 [2022-01-31 22:52:54,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=2109, Invalid=3441, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 22:52:54,738 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 79 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 22:52:54,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 43 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 22:52:54,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-01-31 22:52:54,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2022-01-31 22:52:54,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 79 states have (on average 1.0126582278481013) internal successors, (80), 79 states have internal predecessors, (80), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:52:54,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2022-01-31 22:52:54,749 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 81 [2022-01-31 22:52:54,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:52:54,749 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2022-01-31 22:52:54,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 38 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:52:54,750 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2022-01-31 22:52:54,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-31 22:52:54,750 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:52:54,750 INFO L514 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:52:54,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-01-31 22:52:54,750 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:52:54,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:52:54,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1710237227, now seen corresponding path program 36 times [2022-01-31 22:52:54,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:52:54,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [128192385] [2022-01-31 22:52:54,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:52:54,752 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:52:54,752 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:52:54,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:52:54,753 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:52:54,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:52:55,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:52:55,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:52:55,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:52:55,272 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:52:55,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [128192385] [2022-01-31 22:52:55,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [128192385] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:52:55,273 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:52:55,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-01-31 22:52:55,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263618743] [2022-01-31 22:52:55,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:52:55,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 22:52:55,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:52:55,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 22:52:55,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 22:52:55,274 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand has 40 states, 40 states have (on average 1.975) internal successors, (79), 39 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 22:52:55,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:52:55,662 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2022-01-31 22:52:55,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 22:52:55,662 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.975) internal successors, (79), 39 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 83 [2022-01-31 22:52:55,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:52:55,663 INFO L225 Difference]: With dead ends: 92 [2022-01-31 22:52:55,663 INFO L226 Difference]: Without dead ends: 87 [2022-01-31 22:52:55,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2223, Invalid=3629, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 22:52:55,664 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 81 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 22:52:55,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 48 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 22:52:55,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-01-31 22:52:55,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2022-01-31 22:52:55,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 81 states have (on average 1.0123456790123457) internal successors, (82), 81 states have internal predecessors, (82), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:52:55,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2022-01-31 22:52:55,681 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 83 [2022-01-31 22:52:55,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:52:55,681 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2022-01-31 22:52:55,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.975) internal successors, (79), 39 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 22:52:55,681 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2022-01-31 22:52:55,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-01-31 22:52:55,682 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:52:55,682 INFO L514 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:52:55,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-01-31 22:52:55,682 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:52:55,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:52:55,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1725107213, now seen corresponding path program 37 times [2022-01-31 22:52:55,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:52:55,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [938459460] [2022-01-31 22:52:55,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:52:55,687 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:52:55,687 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:52:55,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:52:55,688 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:52:55,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:52:56,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:52:56,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:52:56,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:52:56,055 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:52:56,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [938459460] [2022-01-31 22:52:56,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [938459460] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:52:56,055 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:52:56,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-01-31 22:52:56,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419424425] [2022-01-31 22:52:56,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:52:56,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-31 22:52:56,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:52:56,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-31 22:52:56,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 22:52:56,056 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 40 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 22:52:56,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:52:56,625 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2022-01-31 22:52:56,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 22:52:56,625 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 40 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 85 [2022-01-31 22:52:56,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:52:56,628 INFO L225 Difference]: With dead ends: 94 [2022-01-31 22:52:56,628 INFO L226 Difference]: Without dead ends: 89 [2022-01-31 22:52:56,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2340, Invalid=3822, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 22:52:56,648 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 83 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:52:56,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 43 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:52:56,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-01-31 22:52:56,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2022-01-31 22:52:56,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.0120481927710843) internal successors, (84), 83 states have internal predecessors, (84), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:52:56,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2022-01-31 22:52:56,664 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 85 [2022-01-31 22:52:56,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:52:56,665 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2022-01-31 22:52:56,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 40 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 22:52:56,666 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2022-01-31 22:52:56,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-01-31 22:52:56,666 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:52:56,666 INFO L514 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:52:56,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-01-31 22:52:56,666 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:52:56,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:52:56,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1164705425, now seen corresponding path program 38 times [2022-01-31 22:52:56,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:52:56,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1214601362] [2022-01-31 22:52:56,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:52:56,669 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:52:56,669 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:52:56,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:52:56,669 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:52:56,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:52:57,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:52:57,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:52:57,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:52:57,198 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:52:57,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1214601362] [2022-01-31 22:52:57,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1214601362] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:52:57,198 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:52:57,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-01-31 22:52:57,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786443009] [2022-01-31 22:52:57,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:52:57,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 22:52:57,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:52:57,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 22:52:57,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 22:52:57,200 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand has 42 states, 42 states have (on average 1.9761904761904763) internal successors, (83), 41 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:52:57,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:52:57,747 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2022-01-31 22:52:57,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-31 22:52:57,748 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9761904761904763) internal successors, (83), 41 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 87 [2022-01-31 22:52:57,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:52:57,749 INFO L225 Difference]: With dead ends: 96 [2022-01-31 22:52:57,749 INFO L226 Difference]: Without dead ends: 91 [2022-01-31 22:52:57,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2460, Invalid=4020, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 22:52:57,750 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 85 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:52:57,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 53 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:52:57,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-01-31 22:52:57,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2022-01-31 22:52:57,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 85 states have (on average 1.011764705882353) internal successors, (86), 85 states have internal predecessors, (86), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:52:57,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2022-01-31 22:52:57,792 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 87 [2022-01-31 22:52:57,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:52:57,792 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2022-01-31 22:52:57,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9761904761904763) internal successors, (83), 41 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:52:57,792 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2022-01-31 22:52:57,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-01-31 22:52:57,819 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:52:57,819 INFO L514 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:52:57,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-01-31 22:52:57,820 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:52:57,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:52:57,820 INFO L85 PathProgramCache]: Analyzing trace with hash -569189969, now seen corresponding path program 39 times [2022-01-31 22:52:57,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:52:57,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [862647564] [2022-01-31 22:52:57,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:52:57,822 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:52:57,822 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:52:57,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:52:57,823 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:52:57,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:52:58,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:52:58,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:52:58,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:52:58,244 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:52:58,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [862647564] [2022-01-31 22:52:58,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [862647564] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:52:58,245 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:52:58,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-01-31 22:52:58,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122889178] [2022-01-31 22:52:58,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:52:58,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-31 22:52:58,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:52:58,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-31 22:52:58,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 22:52:58,246 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 42 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:52:58,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:52:58,768 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2022-01-31 22:52:58,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-31 22:52:58,768 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 42 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2022-01-31 22:52:58,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:52:58,769 INFO L225 Difference]: With dead ends: 98 [2022-01-31 22:52:58,769 INFO L226 Difference]: Without dead ends: 93 [2022-01-31 22:52:58,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2583, Invalid=4223, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 22:52:58,770 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 87 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:52:58,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 33 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:52:58,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-01-31 22:52:58,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2022-01-31 22:52:58,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 87 states have (on average 1.0114942528735633) internal successors, (88), 87 states have internal predecessors, (88), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:52:58,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2022-01-31 22:52:58,788 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 89 [2022-01-31 22:52:58,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:52:58,788 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2022-01-31 22:52:58,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 42 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:52:58,788 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2022-01-31 22:52:58,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-01-31 22:52:58,788 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:52:58,788 INFO L514 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:52:58,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-01-31 22:52:58,789 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:52:58,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:52:58,789 INFO L85 PathProgramCache]: Analyzing trace with hash -395352755, now seen corresponding path program 40 times [2022-01-31 22:52:58,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:52:58,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1831128976] [2022-01-31 22:52:58,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:52:58,791 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:52:58,791 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:52:58,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:52:58,791 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:52:58,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:52:59,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:52:59,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:52:59,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:52:59,254 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:52:59,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1831128976] [2022-01-31 22:52:59,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1831128976] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:52:59,254 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:52:59,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-01-31 22:52:59,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278443736] [2022-01-31 22:52:59,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:52:59,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 22:52:59,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:52:59,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 22:52:59,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 22:52:59,255 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 43 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:52:59,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:52:59,730 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2022-01-31 22:52:59,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-31 22:52:59,730 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 43 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 91 [2022-01-31 22:52:59,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:52:59,731 INFO L225 Difference]: With dead ends: 100 [2022-01-31 22:52:59,731 INFO L226 Difference]: Without dead ends: 95 [2022-01-31 22:52:59,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2709, Invalid=4431, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 22:52:59,732 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 89 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:52:59,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 43 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:52:59,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-01-31 22:52:59,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2022-01-31 22:52:59,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 89 states have (on average 1.0112359550561798) internal successors, (90), 89 states have internal predecessors, (90), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:52:59,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2022-01-31 22:52:59,748 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 91 [2022-01-31 22:52:59,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:52:59,748 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2022-01-31 22:52:59,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 43 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:52:59,748 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2022-01-31 22:52:59,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-01-31 22:52:59,748 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:52:59,748 INFO L514 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:52:59,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-01-31 22:52:59,749 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:52:59,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:52:59,749 INFO L85 PathProgramCache]: Analyzing trace with hash -841514645, now seen corresponding path program 41 times [2022-01-31 22:52:59,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:52:59,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1784794973] [2022-01-31 22:52:59,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:52:59,751 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:52:59,751 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:52:59,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:52:59,753 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:52:59,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:53:00,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:53:00,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:53:00,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:53:00,177 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:53:00,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1784794973] [2022-01-31 22:53:00,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1784794973] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:53:00,177 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:53:00,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-01-31 22:53:00,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291860380] [2022-01-31 22:53:00,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:53:00,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-31 22:53:00,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:53:00,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-31 22:53:00,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 22:53:00,178 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand has 45 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 44 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 22:53:00,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:53:00,997 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2022-01-31 22:53:00,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 22:53:01,008 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 44 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 93 [2022-01-31 22:53:01,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:53:01,012 INFO L225 Difference]: With dead ends: 102 [2022-01-31 22:53:01,012 INFO L226 Difference]: Without dead ends: 97 [2022-01-31 22:53:01,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2838, Invalid=4644, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 22:53:01,025 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 91 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:53:01,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 38 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:53:01,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-01-31 22:53:01,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2022-01-31 22:53:01,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 91 states have (on average 1.010989010989011) internal successors, (92), 91 states have internal predecessors, (92), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:53:01,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2022-01-31 22:53:01,050 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 93 [2022-01-31 22:53:01,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:53:01,052 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2022-01-31 22:53:01,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 44 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 22:53:01,052 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2022-01-31 22:53:01,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-01-31 22:53:01,055 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:53:01,055 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:53:01,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-01-31 22:53:01,055 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:53:01,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:53:01,056 INFO L85 PathProgramCache]: Analyzing trace with hash -106361335, now seen corresponding path program 42 times [2022-01-31 22:53:01,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:53:01,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [907441805] [2022-01-31 22:53:01,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:53:01,059 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:53:01,059 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:53:01,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:53:01,060 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:53:01,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:53:01,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:53:01,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:53:01,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:53:01,741 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:53:01,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [907441805] [2022-01-31 22:53:01,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [907441805] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:53:01,742 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:53:01,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-01-31 22:53:01,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422548560] [2022-01-31 22:53:01,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:53:01,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-31 22:53:01,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:53:01,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-31 22:53:01,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 22:53:01,743 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 45 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:53:02,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:53:02,574 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2022-01-31 22:53:02,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 22:53:02,575 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 45 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2022-01-31 22:53:02,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:53:02,575 INFO L225 Difference]: With dead ends: 104 [2022-01-31 22:53:02,575 INFO L226 Difference]: Without dead ends: 99 [2022-01-31 22:53:02,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2970, Invalid=4862, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 22:53:02,576 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:53:02,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 33 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:53:02,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-01-31 22:53:02,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2022-01-31 22:53:02,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 93 states have (on average 1.010752688172043) internal successors, (94), 93 states have internal predecessors, (94), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:53:02,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2022-01-31 22:53:02,616 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 95 [2022-01-31 22:53:02,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:53:02,616 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2022-01-31 22:53:02,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 45 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:53:02,616 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2022-01-31 22:53:02,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-01-31 22:53:02,617 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:53:02,617 INFO L514 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:53:02,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-01-31 22:53:02,617 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:53:02,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:53:02,618 INFO L85 PathProgramCache]: Analyzing trace with hash 2001333031, now seen corresponding path program 43 times [2022-01-31 22:53:02,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:53:02,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [862510506] [2022-01-31 22:53:02,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:53:02,620 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:53:02,620 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:53:02,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:53:02,621 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:53:02,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:53:03,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:53:03,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:53:03,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:53:03,335 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:53:03,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [862510506] [2022-01-31 22:53:03,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [862510506] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:53:03,335 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:53:03,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-01-31 22:53:03,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992356245] [2022-01-31 22:53:03,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:53:03,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-31 22:53:03,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:53:03,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-31 22:53:03,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 22:53:03,336 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand has 47 states, 47 states have (on average 1.9787234042553192) internal successors, (93), 46 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:53:03,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:53:03,967 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2022-01-31 22:53:03,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-31 22:53:03,967 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9787234042553192) internal successors, (93), 46 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 97 [2022-01-31 22:53:03,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:53:03,968 INFO L225 Difference]: With dead ends: 106 [2022-01-31 22:53:03,968 INFO L226 Difference]: Without dead ends: 101 [2022-01-31 22:53:03,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=3105, Invalid=5085, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 22:53:03,969 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 95 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:53:03,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 53 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:53:03,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-01-31 22:53:03,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2022-01-31 22:53:03,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 95 states have (on average 1.0105263157894737) internal successors, (96), 95 states have internal predecessors, (96), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:53:03,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2022-01-31 22:53:03,989 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 97 [2022-01-31 22:53:03,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:53:03,990 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2022-01-31 22:53:03,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.9787234042553192) internal successors, (93), 46 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:53:03,990 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2022-01-31 22:53:03,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-01-31 22:53:03,990 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:53:03,990 INFO L514 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:53:03,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-01-31 22:53:03,990 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:53:03,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:53:03,991 INFO L85 PathProgramCache]: Analyzing trace with hash 271055045, now seen corresponding path program 44 times [2022-01-31 22:53:03,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:53:03,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2134018893] [2022-01-31 22:53:03,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:53:03,992 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:53:03,992 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:53:03,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:53:03,993 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:53:04,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:53:04,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:53:04,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:53:04,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:53:04,716 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:53:04,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2134018893] [2022-01-31 22:53:04,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2134018893] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:53:04,716 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:53:04,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-01-31 22:53:04,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780237753] [2022-01-31 22:53:04,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:53:04,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-31 22:53:04,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:53:04,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-31 22:53:04,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 22:53:04,717 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand has 48 states, 48 states have (on average 1.9791666666666667) internal successors, (95), 47 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:53:05,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:53:05,538 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2022-01-31 22:53:05,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 22:53:05,538 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.9791666666666667) internal successors, (95), 47 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 99 [2022-01-31 22:53:05,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:53:05,538 INFO L225 Difference]: With dead ends: 108 [2022-01-31 22:53:05,539 INFO L226 Difference]: Without dead ends: 103 [2022-01-31 22:53:05,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3243, Invalid=5313, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 22:53:05,541 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 97 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:53:05,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 38 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:53:05,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-01-31 22:53:05,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2022-01-31 22:53:05,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 97 states have (on average 1.0103092783505154) internal successors, (98), 97 states have internal predecessors, (98), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:53:05,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2022-01-31 22:53:05,557 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 99 [2022-01-31 22:53:05,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:53:05,557 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2022-01-31 22:53:05,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.9791666666666667) internal successors, (95), 47 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:53:05,557 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2022-01-31 22:53:05,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-01-31 22:53:05,557 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:53:05,558 INFO L514 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:53:05,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-01-31 22:53:05,558 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:53:05,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:53:05,558 INFO L85 PathProgramCache]: Analyzing trace with hash -373745949, now seen corresponding path program 45 times [2022-01-31 22:53:05,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:53:05,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [98616671] [2022-01-31 22:53:05,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:53:05,564 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:53:05,564 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:53:05,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:53:05,566 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:53:05,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:53:06,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:53:06,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:53:06,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:53:06,106 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:53:06,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [98616671] [2022-01-31 22:53:06,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [98616671] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:53:06,106 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:53:06,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-01-31 22:53:06,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503823677] [2022-01-31 22:53:06,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:53:06,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-31 22:53:06,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:53:06,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-31 22:53:06,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 22:53:06,107 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand has 49 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 48 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:53:06,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:53:06,738 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2022-01-31 22:53:06,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 22:53:06,738 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 48 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 101 [2022-01-31 22:53:06,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:53:06,739 INFO L225 Difference]: With dead ends: 110 [2022-01-31 22:53:06,739 INFO L226 Difference]: Without dead ends: 105 [2022-01-31 22:53:06,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=3384, Invalid=5546, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 22:53:06,740 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:53:06,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 33 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:53:06,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-01-31 22:53:06,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2022-01-31 22:53:06,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 99 states have (on average 1.0101010101010102) internal successors, (100), 99 states have internal predecessors, (100), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:53:06,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2022-01-31 22:53:06,757 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 101 [2022-01-31 22:53:06,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:53:06,757 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2022-01-31 22:53:06,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 48 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:53:06,757 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2022-01-31 22:53:06,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-01-31 22:53:06,758 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:53:06,758 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:53:06,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-01-31 22:53:06,758 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:53:06,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:53:06,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1552210559, now seen corresponding path program 46 times [2022-01-31 22:53:06,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:53:06,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [432944509] [2022-01-31 22:53:06,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:53:06,760 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:53:06,760 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:53:06,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:53:06,761 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:53:06,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:53:07,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:53:07,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:53:07,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:53:07,537 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:53:07,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [432944509] [2022-01-31 22:53:07,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [432944509] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:53:07,537 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:53:07,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-01-31 22:53:07,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423838798] [2022-01-31 22:53:07,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:53:07,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 22:53:07,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:53:07,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 22:53:07,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 22:53:07,538 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand has 50 states, 50 states have (on average 1.98) internal successors, (99), 49 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:53:08,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:53:08,457 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2022-01-31 22:53:08,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-31 22:53:08,458 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.98) internal successors, (99), 49 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 103 [2022-01-31 22:53:08,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:53:08,458 INFO L225 Difference]: With dead ends: 112 [2022-01-31 22:53:08,458 INFO L226 Difference]: Without dead ends: 107 [2022-01-31 22:53:08,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3528, Invalid=5784, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 22:53:08,460 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 101 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:53:08,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 33 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:53:08,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-01-31 22:53:08,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2022-01-31 22:53:08,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 101 states have (on average 1.00990099009901) internal successors, (102), 101 states have internal predecessors, (102), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:53:08,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2022-01-31 22:53:08,478 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 103 [2022-01-31 22:53:08,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:53:08,478 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2022-01-31 22:53:08,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.98) internal successors, (99), 49 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:53:08,478 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2022-01-31 22:53:08,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-01-31 22:53:08,478 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:53:08,478 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:53:08,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-01-31 22:53:08,479 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:53:08,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:53:08,479 INFO L85 PathProgramCache]: Analyzing trace with hash -185334625, now seen corresponding path program 47 times [2022-01-31 22:53:08,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:53:08,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1171217183] [2022-01-31 22:53:08,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:53:08,480 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:53:08,480 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:53:08,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:53:08,481 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:53:08,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:53:09,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:53:09,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:53:09,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:53:09,219 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:53:09,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1171217183] [2022-01-31 22:53:09,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1171217183] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:53:09,220 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:53:09,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-01-31 22:53:09,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023867199] [2022-01-31 22:53:09,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:53:09,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-31 22:53:09,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:53:09,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-31 22:53:09,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 22:53:09,221 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand has 51 states, 51 states have (on average 1.9803921568627452) internal successors, (101), 50 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:53:10,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:53:10,084 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2022-01-31 22:53:10,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 22:53:10,084 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.9803921568627452) internal successors, (101), 50 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 105 [2022-01-31 22:53:10,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:53:10,085 INFO L225 Difference]: With dead ends: 114 [2022-01-31 22:53:10,085 INFO L226 Difference]: Without dead ends: 109 [2022-01-31 22:53:10,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3675, Invalid=6027, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 22:53:10,086 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 103 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:53:10,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 28 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:53:10,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-01-31 22:53:10,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2022-01-31 22:53:10,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 103 states have (on average 1.0097087378640777) internal successors, (104), 103 states have internal predecessors, (104), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:53:10,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2022-01-31 22:53:10,103 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 105 [2022-01-31 22:53:10,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:53:10,103 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2022-01-31 22:53:10,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.9803921568627452) internal successors, (101), 50 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:53:10,104 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2022-01-31 22:53:10,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-01-31 22:53:10,104 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:53:10,104 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:53:10,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-01-31 22:53:10,106 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:53:10,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:53:10,106 INFO L85 PathProgramCache]: Analyzing trace with hash -877554627, now seen corresponding path program 48 times [2022-01-31 22:53:10,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:53:10,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [143878777] [2022-01-31 22:53:10,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:53:10,107 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:53:10,107 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:53:10,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:53:10,108 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:53:10,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:53:10,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:53:10,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:53:10,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:53:10,943 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:53:10,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [143878777] [2022-01-31 22:53:10,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [143878777] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:53:10,943 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:53:10,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-01-31 22:53:10,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679119124] [2022-01-31 22:53:10,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:53:10,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-01-31 22:53:10,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:53:10,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-01-31 22:53:10,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 22:53:10,944 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand has 52 states, 52 states have (on average 1.9807692307692308) internal successors, (103), 51 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:53:11,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:53:11,743 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2022-01-31 22:53:11,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-31 22:53:11,744 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.9807692307692308) internal successors, (103), 51 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 107 [2022-01-31 22:53:11,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:53:11,745 INFO L225 Difference]: With dead ends: 116 [2022-01-31 22:53:11,745 INFO L226 Difference]: Without dead ends: 111 [2022-01-31 22:53:11,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3825, Invalid=6275, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 22:53:11,746 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:53:11,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 28 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:53:11,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-01-31 22:53:11,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2022-01-31 22:53:11,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 105 states have (on average 1.0095238095238095) internal successors, (106), 105 states have internal predecessors, (106), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:53:11,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2022-01-31 22:53:11,773 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 107 [2022-01-31 22:53:11,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:53:11,773 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2022-01-31 22:53:11,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.9807692307692308) internal successors, (103), 51 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:53:11,773 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2022-01-31 22:53:11,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-01-31 22:53:11,774 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:53:11,774 INFO L514 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:53:11,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-01-31 22:53:11,774 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:53:11,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:53:11,774 INFO L85 PathProgramCache]: Analyzing trace with hash -381045669, now seen corresponding path program 49 times [2022-01-31 22:53:11,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:53:11,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1240679557] [2022-01-31 22:53:11,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:53:11,776 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:53:11,776 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:53:11,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:53:11,777 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:53:11,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:53:12,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:53:12,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:53:12,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:53:12,600 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:53:12,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1240679557] [2022-01-31 22:53:12,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1240679557] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:53:12,600 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:53:12,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-01-31 22:53:12,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049267944] [2022-01-31 22:53:12,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:53:12,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-31 22:53:12,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:53:12,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-31 22:53:12,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 22:53:12,602 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:53:13,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:53:13,448 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2022-01-31 22:53:13,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-31 22:53:13,449 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 109 [2022-01-31 22:53:13,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:53:13,449 INFO L225 Difference]: With dead ends: 118 [2022-01-31 22:53:13,449 INFO L226 Difference]: Without dead ends: 113 [2022-01-31 22:53:13,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3978, Invalid=6528, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 22:53:13,452 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 107 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:53:13,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 33 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:53:13,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-01-31 22:53:13,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2022-01-31 22:53:13,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 107 states have (on average 1.0093457943925233) internal successors, (108), 107 states have internal predecessors, (108), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:53:13,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2022-01-31 22:53:13,485 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 109 [2022-01-31 22:53:13,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:53:13,485 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2022-01-31 22:53:13,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:53:13,486 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2022-01-31 22:53:13,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-01-31 22:53:13,486 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:53:13,486 INFO L514 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:53:13,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-01-31 22:53:13,487 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:53:13,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:53:13,487 INFO L85 PathProgramCache]: Analyzing trace with hash 22693113, now seen corresponding path program 50 times [2022-01-31 22:53:13,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:53:13,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1039982598] [2022-01-31 22:53:13,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:53:13,489 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:53:13,489 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:53:13,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:53:13,495 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:53:13,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:53:14,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:53:14,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:53:14,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:53:14,405 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:53:14,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1039982598] [2022-01-31 22:53:14,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1039982598] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:53:14,405 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:53:14,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-01-31 22:53:14,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33068357] [2022-01-31 22:53:14,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:53:14,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-01-31 22:53:14,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:53:14,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-01-31 22:53:14,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 22:53:14,407 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand has 54 states, 54 states have (on average 1.9814814814814814) internal successors, (107), 53 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:53:15,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:53:15,392 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2022-01-31 22:53:15,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-31 22:53:15,392 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.9814814814814814) internal successors, (107), 53 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 111 [2022-01-31 22:53:15,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:53:15,393 INFO L225 Difference]: With dead ends: 120 [2022-01-31 22:53:15,393 INFO L226 Difference]: Without dead ends: 115 [2022-01-31 22:53:15,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1325 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4134, Invalid=6786, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 22:53:15,396 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 109 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:53:15,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 33 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:53:15,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-01-31 22:53:15,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2022-01-31 22:53:15,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 109 states have (on average 1.0091743119266054) internal successors, (110), 109 states have internal predecessors, (110), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:53:15,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2022-01-31 22:53:15,420 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 111 [2022-01-31 22:53:15,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:53:15,420 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2022-01-31 22:53:15,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.9814814814814814) internal successors, (107), 53 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:53:15,420 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2022-01-31 22:53:15,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-01-31 22:53:15,420 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:53:15,420 INFO L514 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:53:15,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-01-31 22:53:15,421 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:53:15,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:53:15,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1468605975, now seen corresponding path program 51 times [2022-01-31 22:53:15,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:53:15,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1130955360] [2022-01-31 22:53:15,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:53:15,422 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:53:15,422 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:53:15,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:53:15,424 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:53:15,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:53:16,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:53:16,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:53:16,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:53:16,140 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:53:16,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1130955360] [2022-01-31 22:53:16,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1130955360] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:53:16,140 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:53:16,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-01-31 22:53:16,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846465056] [2022-01-31 22:53:16,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:53:16,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-01-31 22:53:16,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:53:16,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-01-31 22:53:16,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 22:53:16,141 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand has 55 states, 55 states have (on average 1.981818181818182) internal successors, (109), 54 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:53:17,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:53:17,387 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2022-01-31 22:53:17,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-31 22:53:17,388 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.981818181818182) internal successors, (109), 54 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 113 [2022-01-31 22:53:17,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:53:17,388 INFO L225 Difference]: With dead ends: 122 [2022-01-31 22:53:17,388 INFO L226 Difference]: Without dead ends: 117 [2022-01-31 22:53:17,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4293, Invalid=7049, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 22:53:17,389 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:53:17,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 38 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:53:17,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-01-31 22:53:17,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2022-01-31 22:53:17,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 111 states have (on average 1.009009009009009) internal successors, (112), 111 states have internal predecessors, (112), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:53:17,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2022-01-31 22:53:17,408 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 113 [2022-01-31 22:53:17,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:53:17,408 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2022-01-31 22:53:17,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.981818181818182) internal successors, (109), 54 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:53:17,408 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2022-01-31 22:53:17,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-01-31 22:53:17,408 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:53:17,408 INFO L514 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:53:17,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-01-31 22:53:17,408 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:53:17,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:53:17,409 INFO L85 PathProgramCache]: Analyzing trace with hash -578537547, now seen corresponding path program 52 times [2022-01-31 22:53:17,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:53:17,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2062620982] [2022-01-31 22:53:17,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:53:17,410 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:53:17,410 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:53:17,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:53:17,411 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:53:17,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:53:18,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:53:18,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:53:18,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:53:18,260 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:53:18,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2062620982] [2022-01-31 22:53:18,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2062620982] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:53:18,260 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:53:18,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-01-31 22:53:18,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810248991] [2022-01-31 22:53:18,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:53:18,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-31 22:53:18,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:53:18,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-31 22:53:18,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 22:53:18,262 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand has 56 states, 56 states have (on average 1.9821428571428572) internal successors, (111), 55 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:53:19,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:53:19,150 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2022-01-31 22:53:19,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-31 22:53:19,150 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.9821428571428572) internal successors, (111), 55 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 115 [2022-01-31 22:53:19,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:53:19,151 INFO L225 Difference]: With dead ends: 124 [2022-01-31 22:53:19,151 INFO L226 Difference]: Without dead ends: 119 [2022-01-31 22:53:19,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=4455, Invalid=7317, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 22:53:19,152 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 113 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:53:19,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 43 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:53:19,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-01-31 22:53:19,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2022-01-31 22:53:19,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 113 states have (on average 1.008849557522124) internal successors, (114), 113 states have internal predecessors, (114), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:53:19,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2022-01-31 22:53:19,171 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 115 [2022-01-31 22:53:19,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:53:19,171 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2022-01-31 22:53:19,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.9821428571428572) internal successors, (111), 55 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:53:19,171 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2022-01-31 22:53:19,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-01-31 22:53:19,172 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:53:19,172 INFO L514 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:53:19,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-01-31 22:53:19,172 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:53:19,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:53:19,172 INFO L85 PathProgramCache]: Analyzing trace with hash -788440621, now seen corresponding path program 53 times [2022-01-31 22:53:19,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:53:19,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [996251902] [2022-01-31 22:53:19,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:53:19,173 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:53:19,173 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:53:19,174 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:53:19,174 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:53:19,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:53:19,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:53:19,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:53:19,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:53:20,000 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:53:20,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [996251902] [2022-01-31 22:53:20,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [996251902] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:53:20,000 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:53:20,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-01-31 22:53:20,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188769339] [2022-01-31 22:53:20,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:53:20,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-01-31 22:53:20,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:53:20,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-01-31 22:53:20,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 22:53:20,001 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand has 57 states, 57 states have (on average 1.9824561403508771) internal successors, (113), 56 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:53:21,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:53:21,130 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2022-01-31 22:53:21,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 22:53:21,130 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.9824561403508771) internal successors, (113), 56 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 117 [2022-01-31 22:53:21,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:53:21,131 INFO L225 Difference]: With dead ends: 126 [2022-01-31 22:53:21,131 INFO L226 Difference]: Without dead ends: 121 [2022-01-31 22:53:21,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1484 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4620, Invalid=7590, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 22:53:21,132 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 115 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:53:21,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 58 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:53:21,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-01-31 22:53:21,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2022-01-31 22:53:21,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 115 states have (on average 1.008695652173913) internal successors, (116), 115 states have internal predecessors, (116), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:53:21,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 120 transitions. [2022-01-31 22:53:21,152 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 120 transitions. Word has length 117 [2022-01-31 22:53:21,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:53:21,152 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 120 transitions. [2022-01-31 22:53:21,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.9824561403508771) internal successors, (113), 56 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:53:21,152 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 120 transitions. [2022-01-31 22:53:21,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-01-31 22:53:21,153 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:53:21,153 INFO L514 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:53:21,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-01-31 22:53:21,153 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:53:21,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:53:21,153 INFO L85 PathProgramCache]: Analyzing trace with hash -641831823, now seen corresponding path program 54 times [2022-01-31 22:53:21,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:53:21,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1814272517] [2022-01-31 22:53:21,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:53:21,155 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:53:21,155 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:53:21,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:53:21,155 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:53:21,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:53:22,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:53:22,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:53:22,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:53:22,182 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:53:22,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1814272517] [2022-01-31 22:53:22,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1814272517] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:53:22,182 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:53:22,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-01-31 22:53:22,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110930627] [2022-01-31 22:53:22,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:53:22,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-01-31 22:53:22,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:53:22,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-01-31 22:53:22,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 22:53:22,183 INFO L87 Difference]: Start difference. First operand 120 states and 120 transitions. Second operand has 58 states, 58 states have (on average 1.9827586206896552) internal successors, (115), 57 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:53:23,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:53:23,337 INFO L93 Difference]: Finished difference Result 128 states and 128 transitions. [2022-01-31 22:53:23,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-31 22:53:23,338 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.9827586206896552) internal successors, (115), 57 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 119 [2022-01-31 22:53:23,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:53:23,338 INFO L225 Difference]: With dead ends: 128 [2022-01-31 22:53:23,338 INFO L226 Difference]: Without dead ends: 123 [2022-01-31 22:53:23,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=4788, Invalid=7868, Unknown=0, NotChecked=0, Total=12656 [2022-01-31 22:53:23,340 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 117 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:53:23,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 38 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:53:23,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-01-31 22:53:23,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2022-01-31 22:53:23,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 117 states have (on average 1.0085470085470085) internal successors, (118), 117 states have internal predecessors, (118), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:53:23,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2022-01-31 22:53:23,361 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 119 [2022-01-31 22:53:23,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:53:23,361 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2022-01-31 22:53:23,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.9827586206896552) internal successors, (115), 57 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:53:23,361 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2022-01-31 22:53:23,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-01-31 22:53:23,361 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:53:23,361 INFO L514 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:53:23,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-01-31 22:53:23,362 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:53:23,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:53:23,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1484697713, now seen corresponding path program 55 times [2022-01-31 22:53:23,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:53:23,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1368795115] [2022-01-31 22:53:23,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:53:23,363 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:53:23,363 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:53:23,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:53:23,364 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:53:23,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:53:24,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:53:24,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:53:24,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:53:24,428 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:53:24,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1368795115] [2022-01-31 22:53:24,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1368795115] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:53:24,428 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:53:24,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-01-31 22:53:24,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136855664] [2022-01-31 22:53:24,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:53:24,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-01-31 22:53:24,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:53:24,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-01-31 22:53:24,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 22:53:24,430 INFO L87 Difference]: Start difference. First operand 122 states and 122 transitions. Second operand has 59 states, 59 states have (on average 1.9830508474576272) internal successors, (117), 58 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:53:25,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:53:25,798 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2022-01-31 22:53:25,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-31 22:53:25,798 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.9830508474576272) internal successors, (117), 58 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 121 [2022-01-31 22:53:25,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:53:25,799 INFO L225 Difference]: With dead ends: 130 [2022-01-31 22:53:25,799 INFO L226 Difference]: Without dead ends: 125 [2022-01-31 22:53:25,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=4959, Invalid=8151, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 22:53:25,800 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 119 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:53:25,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 33 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:53:25,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-01-31 22:53:25,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2022-01-31 22:53:25,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 119 states have (on average 1.0084033613445378) internal successors, (120), 119 states have internal predecessors, (120), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:53:25,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2022-01-31 22:53:25,821 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 121 [2022-01-31 22:53:25,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:53:25,821 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2022-01-31 22:53:25,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.9830508474576272) internal successors, (117), 58 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:53:25,821 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2022-01-31 22:53:25,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-01-31 22:53:25,822 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:53:25,822 INFO L514 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:53:25,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-01-31 22:53:25,822 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:53:25,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:53:25,822 INFO L85 PathProgramCache]: Analyzing trace with hash 270000941, now seen corresponding path program 56 times [2022-01-31 22:53:25,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:53:25,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [931183852] [2022-01-31 22:53:25,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:53:25,823 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:53:25,823 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:53:25,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:53:25,824 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:53:25,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:53:26,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:53:26,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:53:26,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:53:26,819 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:53:26,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [931183852] [2022-01-31 22:53:26,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [931183852] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:53:26,819 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:53:26,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-01-31 22:53:26,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586081357] [2022-01-31 22:53:26,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:53:26,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-01-31 22:53:26,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:53:26,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-01-31 22:53:26,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 22:53:26,820 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand has 60 states, 60 states have (on average 1.9833333333333334) internal successors, (119), 59 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:53:27,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:53:27,912 INFO L93 Difference]: Finished difference Result 132 states and 132 transitions. [2022-01-31 22:53:27,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-31 22:53:27,913 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.9833333333333334) internal successors, (119), 59 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 123 [2022-01-31 22:53:27,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:53:27,913 INFO L225 Difference]: With dead ends: 132 [2022-01-31 22:53:27,913 INFO L226 Difference]: Without dead ends: 127 [2022-01-31 22:53:27,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1652 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=5133, Invalid=8439, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 22:53:27,915 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 121 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:53:27,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 33 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:53:27,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-01-31 22:53:27,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2022-01-31 22:53:27,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 121 states have (on average 1.0082644628099173) internal successors, (122), 121 states have internal predecessors, (122), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:53:27,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 126 transitions. [2022-01-31 22:53:27,938 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 126 transitions. Word has length 123 [2022-01-31 22:53:27,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:53:27,938 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 126 transitions. [2022-01-31 22:53:27,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.9833333333333334) internal successors, (119), 59 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:53:27,939 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 126 transitions. [2022-01-31 22:53:27,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-01-31 22:53:27,939 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:53:27,939 INFO L514 BasicCegarLoop]: trace histogram [57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:53:27,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-01-31 22:53:27,939 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:53:27,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:53:27,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1386739893, now seen corresponding path program 57 times [2022-01-31 22:53:27,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:53:27,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [105543111] [2022-01-31 22:53:27,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:53:27,941 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:53:27,941 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:53:27,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:53:27,941 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:53:27,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:53:29,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:53:29,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:53:29,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:53:29,048 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:53:29,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [105543111] [2022-01-31 22:53:29,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [105543111] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:53:29,059 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:53:29,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-01-31 22:53:29,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532603537] [2022-01-31 22:53:29,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:53:29,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-01-31 22:53:29,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:53:29,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-01-31 22:53:29,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 22:53:29,060 INFO L87 Difference]: Start difference. First operand 126 states and 126 transitions. Second operand has 61 states, 61 states have (on average 1.9836065573770492) internal successors, (121), 60 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:53:30,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:53:30,480 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2022-01-31 22:53:30,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-31 22:53:30,481 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.9836065573770492) internal successors, (121), 60 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 125 [2022-01-31 22:53:30,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:53:30,481 INFO L225 Difference]: With dead ends: 134 [2022-01-31 22:53:30,481 INFO L226 Difference]: Without dead ends: 129 [2022-01-31 22:53:30,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1710 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=5310, Invalid=8732, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 22:53:30,483 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 123 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:53:30,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 38 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:53:30,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-01-31 22:53:30,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2022-01-31 22:53:30,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 123 states have (on average 1.008130081300813) internal successors, (124), 123 states have internal predecessors, (124), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:53:30,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 128 transitions. [2022-01-31 22:53:30,505 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 128 transitions. Word has length 125 [2022-01-31 22:53:30,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:53:30,506 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 128 transitions. [2022-01-31 22:53:30,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.9836065573770492) internal successors, (121), 60 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:53:30,506 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 128 transitions. [2022-01-31 22:53:30,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-01-31 22:53:30,506 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:53:30,506 INFO L514 BasicCegarLoop]: trace histogram [58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:53:30,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-01-31 22:53:30,506 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:53:30,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:53:30,507 INFO L85 PathProgramCache]: Analyzing trace with hash -81814551, now seen corresponding path program 58 times [2022-01-31 22:53:30,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:53:30,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2016414319] [2022-01-31 22:53:30,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:53:30,508 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:53:30,508 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:53:30,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:53:30,509 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:53:30,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:53:31,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:53:31,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:53:31,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:53:31,602 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:53:31,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2016414319] [2022-01-31 22:53:31,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2016414319] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:53:31,602 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:53:31,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-01-31 22:53:31,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805282864] [2022-01-31 22:53:31,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:53:31,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-01-31 22:53:31,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:53:31,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-01-31 22:53:31,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 22:53:31,603 INFO L87 Difference]: Start difference. First operand 128 states and 128 transitions. Second operand has 62 states, 62 states have (on average 1.9838709677419355) internal successors, (123), 61 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:53:33,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:53:33,104 INFO L93 Difference]: Finished difference Result 136 states and 136 transitions. [2022-01-31 22:53:33,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-31 22:53:33,105 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.9838709677419355) internal successors, (123), 61 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 127 [2022-01-31 22:53:33,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:53:33,105 INFO L225 Difference]: With dead ends: 136 [2022-01-31 22:53:33,105 INFO L226 Difference]: Without dead ends: 131 [2022-01-31 22:53:33,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1769 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=5490, Invalid=9030, Unknown=0, NotChecked=0, Total=14520 [2022-01-31 22:53:33,106 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 125 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:53:33,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 48 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:53:33,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-01-31 22:53:33,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2022-01-31 22:53:33,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 125 states have (on average 1.008) internal successors, (126), 125 states have internal predecessors, (126), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:53:33,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 130 transitions. [2022-01-31 22:53:33,129 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 130 transitions. Word has length 127 [2022-01-31 22:53:33,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:53:33,129 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 130 transitions. [2022-01-31 22:53:33,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.9838709677419355) internal successors, (123), 61 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:53:33,130 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 130 transitions. [2022-01-31 22:53:33,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-01-31 22:53:33,130 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:53:33,130 INFO L514 BasicCegarLoop]: trace histogram [59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:53:33,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-01-31 22:53:33,130 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:53:33,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:53:33,130 INFO L85 PathProgramCache]: Analyzing trace with hash -179011321, now seen corresponding path program 59 times [2022-01-31 22:53:33,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:53:33,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2127158265] [2022-01-31 22:53:33,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:53:33,131 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:53:33,132 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:53:33,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:53:33,132 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:53:33,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:53:34,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:53:34,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:53:34,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:53:34,272 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:53:34,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2127158265] [2022-01-31 22:53:34,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2127158265] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:53:34,273 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:53:34,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-01-31 22:53:34,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607269397] [2022-01-31 22:53:34,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:53:34,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-01-31 22:53:34,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:53:34,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-01-31 22:53:34,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 22:53:34,274 INFO L87 Difference]: Start difference. First operand 130 states and 130 transitions. Second operand has 63 states, 63 states have (on average 1.9841269841269842) internal successors, (125), 62 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:53:35,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:53:35,467 INFO L93 Difference]: Finished difference Result 138 states and 138 transitions. [2022-01-31 22:53:35,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-31 22:53:35,467 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.9841269841269842) internal successors, (125), 62 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 129 [2022-01-31 22:53:35,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:53:35,468 INFO L225 Difference]: With dead ends: 138 [2022-01-31 22:53:35,468 INFO L226 Difference]: Without dead ends: 133 [2022-01-31 22:53:35,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1829 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=5673, Invalid=9333, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 22:53:35,469 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 127 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:53:35,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 53 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:53:35,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-01-31 22:53:35,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2022-01-31 22:53:35,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 127 states have (on average 1.0078740157480315) internal successors, (128), 127 states have internal predecessors, (128), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:53:35,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 132 transitions. [2022-01-31 22:53:35,494 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 132 transitions. Word has length 129 [2022-01-31 22:53:35,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:53:35,494 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 132 transitions. [2022-01-31 22:53:35,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.9841269841269842) internal successors, (125), 62 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:53:35,494 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 132 transitions. [2022-01-31 22:53:35,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-01-31 22:53:35,494 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:53:35,494 INFO L514 BasicCegarLoop]: trace histogram [60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:53:35,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-01-31 22:53:35,495 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:53:35,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:53:35,495 INFO L85 PathProgramCache]: Analyzing trace with hash 904173221, now seen corresponding path program 60 times [2022-01-31 22:53:35,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:53:35,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1212658114] [2022-01-31 22:53:35,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:53:35,496 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:53:35,496 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:53:35,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:53:35,497 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:53:35,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:53:36,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:53:36,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:53:36,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:53:36,524 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:53:36,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1212658114] [2022-01-31 22:53:36,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1212658114] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:53:36,524 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:53:36,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-01-31 22:53:36,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297564050] [2022-01-31 22:53:36,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:53:36,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-01-31 22:53:36,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:53:36,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-01-31 22:53:36,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 22:53:36,526 INFO L87 Difference]: Start difference. First operand 132 states and 132 transitions. Second operand has 64 states, 64 states have (on average 1.984375) internal successors, (127), 63 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:53:37,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:53:37,595 INFO L93 Difference]: Finished difference Result 140 states and 140 transitions. [2022-01-31 22:53:37,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-31 22:53:37,595 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.984375) internal successors, (127), 63 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 131 [2022-01-31 22:53:37,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:53:37,595 INFO L225 Difference]: With dead ends: 140 [2022-01-31 22:53:37,595 INFO L226 Difference]: Without dead ends: 135 [2022-01-31 22:53:37,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1890 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=5859, Invalid=9641, Unknown=0, NotChecked=0, Total=15500 [2022-01-31 22:53:37,596 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 129 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:53:37,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 33 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:53:37,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-01-31 22:53:37,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2022-01-31 22:53:37,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 129 states have (on average 1.0077519379844961) internal successors, (130), 129 states have internal predecessors, (130), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:53:37,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 134 transitions. [2022-01-31 22:53:37,621 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 134 transitions. Word has length 131 [2022-01-31 22:53:37,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:53:37,621 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 134 transitions. [2022-01-31 22:53:37,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.984375) internal successors, (127), 63 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:53:37,622 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 134 transitions. [2022-01-31 22:53:37,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-01-31 22:53:37,622 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:53:37,622 INFO L514 BasicCegarLoop]: trace histogram [61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:53:37,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-01-31 22:53:37,622 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:53:37,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:53:37,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1832534845, now seen corresponding path program 61 times [2022-01-31 22:53:37,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:53:37,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [163637565] [2022-01-31 22:53:37,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:53:37,624 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:53:37,624 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:53:37,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:53:37,625 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:53:37,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:53:38,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:53:38,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:53:38,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:53:38,873 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:53:38,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [163637565] [2022-01-31 22:53:38,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [163637565] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:53:38,873 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:53:38,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-01-31 22:53:38,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223314470] [2022-01-31 22:53:38,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:53:38,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-01-31 22:53:38,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:53:38,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-01-31 22:53:38,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 22:53:38,875 INFO L87 Difference]: Start difference. First operand 134 states and 134 transitions. Second operand has 65 states, 65 states have (on average 1.9846153846153847) internal successors, (129), 64 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:53:40,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:53:40,393 INFO L93 Difference]: Finished difference Result 142 states and 142 transitions. [2022-01-31 22:53:40,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-31 22:53:40,394 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.9846153846153847) internal successors, (129), 64 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 133 [2022-01-31 22:53:40,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:53:40,396 INFO L225 Difference]: With dead ends: 142 [2022-01-31 22:53:40,396 INFO L226 Difference]: Without dead ends: 137 [2022-01-31 22:53:40,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1952 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=6048, Invalid=9954, Unknown=0, NotChecked=0, Total=16002 [2022-01-31 22:53:40,400 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 131 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:53:40,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 38 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:53:40,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-01-31 22:53:40,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2022-01-31 22:53:40,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 131 states have (on average 1.0076335877862594) internal successors, (132), 131 states have internal predecessors, (132), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:53:40,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 136 transitions. [2022-01-31 22:53:40,429 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 136 transitions. Word has length 133 [2022-01-31 22:53:40,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:53:40,429 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 136 transitions. [2022-01-31 22:53:40,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.9846153846153847) internal successors, (129), 64 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:53:40,429 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 136 transitions. [2022-01-31 22:53:40,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-01-31 22:53:40,429 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:53:40,429 INFO L514 BasicCegarLoop]: trace histogram [62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:53:40,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-01-31 22:53:40,430 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:53:40,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:53:40,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1005966177, now seen corresponding path program 62 times [2022-01-31 22:53:40,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:53:40,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [55976470] [2022-01-31 22:53:40,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:53:40,431 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:53:40,431 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:53:40,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:53:40,432 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:53:40,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:53:41,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:53:41,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:53:41,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:53:41,272 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:53:41,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [55976470] [2022-01-31 22:53:41,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [55976470] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:53:41,272 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:53:41,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-01-31 22:53:41,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960850375] [2022-01-31 22:53:41,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:53:41,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-01-31 22:53:41,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:53:41,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-01-31 22:53:41,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 22:53:41,276 INFO L87 Difference]: Start difference. First operand 136 states and 136 transitions. Second operand has 66 states, 66 states have (on average 1.9848484848484849) internal successors, (131), 65 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:53:42,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:53:42,828 INFO L93 Difference]: Finished difference Result 144 states and 144 transitions. [2022-01-31 22:53:42,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-31 22:53:42,828 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.9848484848484849) internal successors, (131), 65 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 135 [2022-01-31 22:53:42,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:53:42,829 INFO L225 Difference]: With dead ends: 144 [2022-01-31 22:53:42,829 INFO L226 Difference]: Without dead ends: 139 [2022-01-31 22:53:42,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2015 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=6240, Invalid=10272, Unknown=0, NotChecked=0, Total=16512 [2022-01-31 22:53:42,830 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 133 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:53:42,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 58 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:53:42,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-01-31 22:53:42,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2022-01-31 22:53:42,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 133 states have (on average 1.0075187969924813) internal successors, (134), 133 states have internal predecessors, (134), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:53:42,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 138 transitions. [2022-01-31 22:53:42,857 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 138 transitions. Word has length 135 [2022-01-31 22:53:42,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:53:42,857 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 138 transitions. [2022-01-31 22:53:42,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.9848484848484849) internal successors, (131), 65 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:53:42,857 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 138 transitions. [2022-01-31 22:53:42,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-01-31 22:53:42,858 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:53:42,858 INFO L514 BasicCegarLoop]: trace histogram [63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:53:42,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-01-31 22:53:42,858 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:53:42,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:53:42,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1501215359, now seen corresponding path program 63 times [2022-01-31 22:53:42,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:53:42,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2030548570] [2022-01-31 22:53:42,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:53:42,860 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:53:42,860 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:53:42,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:53:42,860 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:53:42,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:53:44,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:53:44,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:53:44,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:53:44,279 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:53:44,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2030548570] [2022-01-31 22:53:44,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2030548570] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:53:44,279 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:53:44,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-01-31 22:53:44,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745508244] [2022-01-31 22:53:44,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:53:44,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-01-31 22:53:44,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:53:44,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-01-31 22:53:44,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 22:53:44,281 INFO L87 Difference]: Start difference. First operand 138 states and 138 transitions. Second operand has 67 states, 67 states have (on average 1.9850746268656716) internal successors, (133), 66 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:53:45,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:53:45,331 INFO L93 Difference]: Finished difference Result 146 states and 146 transitions. [2022-01-31 22:53:45,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-31 22:53:45,331 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.9850746268656716) internal successors, (133), 66 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 137 [2022-01-31 22:53:45,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:53:45,332 INFO L225 Difference]: With dead ends: 146 [2022-01-31 22:53:45,332 INFO L226 Difference]: Without dead ends: 141 [2022-01-31 22:53:45,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2079 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=6435, Invalid=10595, Unknown=0, NotChecked=0, Total=17030 [2022-01-31 22:53:45,333 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 135 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:53:45,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 43 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:53:45,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-01-31 22:53:45,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2022-01-31 22:53:45,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 135 states have (on average 1.0074074074074073) internal successors, (136), 135 states have internal predecessors, (136), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:53:45,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 140 transitions. [2022-01-31 22:53:45,359 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 140 transitions. Word has length 137 [2022-01-31 22:53:45,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:53:45,359 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 140 transitions. [2022-01-31 22:53:45,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.9850746268656716) internal successors, (133), 66 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:53:45,360 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 140 transitions. [2022-01-31 22:53:45,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-01-31 22:53:45,360 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:53:45,360 INFO L514 BasicCegarLoop]: trace histogram [64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:53:45,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-01-31 22:53:45,360 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:53:45,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:53:45,361 INFO L85 PathProgramCache]: Analyzing trace with hash 694309405, now seen corresponding path program 64 times [2022-01-31 22:53:45,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:53:45,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [936596068] [2022-01-31 22:53:45,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:53:45,362 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:53:45,362 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:53:45,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:53:45,362 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:53:45,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:53:46,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:53:46,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:53:46,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:53:46,832 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:53:46,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [936596068] [2022-01-31 22:53:46,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [936596068] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:53:46,832 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:53:46,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-01-31 22:53:46,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378212901] [2022-01-31 22:53:46,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:53:46,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-01-31 22:53:46,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:53:46,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-01-31 22:53:46,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 22:53:46,834 INFO L87 Difference]: Start difference. First operand 140 states and 140 transitions. Second operand has 68 states, 68 states have (on average 1.9852941176470589) internal successors, (135), 67 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:53:48,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:53:48,226 INFO L93 Difference]: Finished difference Result 148 states and 148 transitions. [2022-01-31 22:53:48,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-31 22:53:48,227 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.9852941176470589) internal successors, (135), 67 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 139 [2022-01-31 22:53:48,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:53:48,227 INFO L225 Difference]: With dead ends: 148 [2022-01-31 22:53:48,227 INFO L226 Difference]: Without dead ends: 143 [2022-01-31 22:53:48,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2144 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=6633, Invalid=10923, Unknown=0, NotChecked=0, Total=17556 [2022-01-31 22:53:48,229 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 137 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:53:48,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 53 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:53:48,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-01-31 22:53:48,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2022-01-31 22:53:48,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 137 states have (on average 1.0072992700729928) internal successors, (138), 137 states have internal predecessors, (138), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:53:48,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 142 transitions. [2022-01-31 22:53:48,265 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 142 transitions. Word has length 139 [2022-01-31 22:53:48,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:53:48,266 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 142 transitions. [2022-01-31 22:53:48,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.9852941176470589) internal successors, (135), 67 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:53:48,266 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 142 transitions. [2022-01-31 22:53:48,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-01-31 22:53:48,266 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:53:48,266 INFO L514 BasicCegarLoop]: trace histogram [65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:53:48,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-01-31 22:53:48,266 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:53:48,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:53:48,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1648199109, now seen corresponding path program 65 times [2022-01-31 22:53:48,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:53:48,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [446755464] [2022-01-31 22:53:48,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:53:48,268 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:53:48,268 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:53:48,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:53:48,269 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:53:48,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:53:49,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:53:49,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:53:49,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:53:49,249 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:53:49,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [446755464] [2022-01-31 22:53:49,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [446755464] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:53:49,249 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:53:49,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-01-31 22:53:49,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181673589] [2022-01-31 22:53:49,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:53:49,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-01-31 22:53:49,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:53:49,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-01-31 22:53:49,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 22:53:49,251 INFO L87 Difference]: Start difference. First operand 142 states and 142 transitions. Second operand has 69 states, 69 states have (on average 1.9855072463768115) internal successors, (137), 68 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:53:50,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:53:50,581 INFO L93 Difference]: Finished difference Result 150 states and 150 transitions. [2022-01-31 22:53:50,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-31 22:53:50,581 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.9855072463768115) internal successors, (137), 68 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 141 [2022-01-31 22:53:50,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:53:50,582 INFO L225 Difference]: With dead ends: 150 [2022-01-31 22:53:50,582 INFO L226 Difference]: Without dead ends: 145 [2022-01-31 22:53:50,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2210 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=6834, Invalid=11256, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 22:53:50,583 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 139 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:53:50,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 33 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:53:50,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-01-31 22:53:50,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 144. [2022-01-31 22:53:50,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 139 states have (on average 1.0071942446043165) internal successors, (140), 139 states have internal predecessors, (140), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:53:50,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 144 transitions. [2022-01-31 22:53:50,624 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 144 transitions. Word has length 141 [2022-01-31 22:53:50,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:53:50,625 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 144 transitions. [2022-01-31 22:53:50,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.9855072463768115) internal successors, (137), 68 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:53:50,625 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 144 transitions. [2022-01-31 22:53:50,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-01-31 22:53:50,625 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:53:50,626 INFO L514 BasicCegarLoop]: trace histogram [66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:53:50,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-01-31 22:53:50,626 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:53:50,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:53:50,626 INFO L85 PathProgramCache]: Analyzing trace with hash 2058949337, now seen corresponding path program 66 times [2022-01-31 22:53:50,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:53:50,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1924055657] [2022-01-31 22:53:50,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:53:50,628 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:53:50,628 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:53:50,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:53:50,628 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:53:50,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:53:51,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:53:51,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:53:51,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:53:51,709 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:53:51,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1924055657] [2022-01-31 22:53:51,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1924055657] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:53:51,709 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:53:51,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-01-31 22:53:51,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203040563] [2022-01-31 22:53:51,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:53:51,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-01-31 22:53:51,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:53:51,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-01-31 22:53:51,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2022-01-31 22:53:51,712 INFO L87 Difference]: Start difference. First operand 144 states and 144 transitions. Second operand has 70 states, 70 states have (on average 1.9857142857142858) internal successors, (139), 69 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:53:53,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:53:53,015 INFO L93 Difference]: Finished difference Result 152 states and 152 transitions. [2022-01-31 22:53:53,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-31 22:53:53,016 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.9857142857142858) internal successors, (139), 69 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2022-01-31 22:53:53,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:53:53,016 INFO L225 Difference]: With dead ends: 152 [2022-01-31 22:53:53,016 INFO L226 Difference]: Without dead ends: 147 [2022-01-31 22:53:53,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2277 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=7038, Invalid=11594, Unknown=0, NotChecked=0, Total=18632 [2022-01-31 22:53:53,018 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 141 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:53:53,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 38 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:53:53,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-01-31 22:53:53,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 146. [2022-01-31 22:53:53,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 141 states have (on average 1.0070921985815602) internal successors, (142), 141 states have internal predecessors, (142), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:53:53,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 146 transitions. [2022-01-31 22:53:53,047 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 146 transitions. Word has length 143 [2022-01-31 22:53:53,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:53:53,047 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 146 transitions. [2022-01-31 22:53:53,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.9857142857142858) internal successors, (139), 69 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:53:53,047 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 146 transitions. [2022-01-31 22:53:53,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-01-31 22:53:53,048 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:53:53,048 INFO L514 BasicCegarLoop]: trace histogram [67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:53:53,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-01-31 22:53:53,048 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:53:53,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:53:53,048 INFO L85 PathProgramCache]: Analyzing trace with hash -194249737, now seen corresponding path program 67 times [2022-01-31 22:53:53,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:53:53,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1576002699] [2022-01-31 22:53:53,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:53:53,050 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:53:53,050 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:53:53,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:53:53,050 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:53:53,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:53:54,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:53:54,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:53:54,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:53:54,275 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:53:54,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1576002699] [2022-01-31 22:53:54,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1576002699] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:53:54,275 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:53:54,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-01-31 22:53:54,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803905623] [2022-01-31 22:53:54,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:53:54,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-01-31 22:53:54,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:53:54,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-01-31 22:53:54,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 22:53:54,276 INFO L87 Difference]: Start difference. First operand 146 states and 146 transitions. Second operand has 71 states, 71 states have (on average 1.9859154929577465) internal successors, (141), 70 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:53:55,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:53:55,701 INFO L93 Difference]: Finished difference Result 154 states and 154 transitions. [2022-01-31 22:53:55,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-31 22:53:55,701 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.9859154929577465) internal successors, (141), 70 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 145 [2022-01-31 22:53:55,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:53:55,702 INFO L225 Difference]: With dead ends: 154 [2022-01-31 22:53:55,702 INFO L226 Difference]: Without dead ends: 149 [2022-01-31 22:53:55,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2345 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=7245, Invalid=11937, Unknown=0, NotChecked=0, Total=19182 [2022-01-31 22:53:55,703 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 143 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:53:55,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 23 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:53:55,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-01-31 22:53:55,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 148. [2022-01-31 22:53:55,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 143 states have (on average 1.006993006993007) internal successors, (144), 143 states have internal predecessors, (144), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:53:55,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2022-01-31 22:53:55,732 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 145 [2022-01-31 22:53:55,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:53:55,732 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2022-01-31 22:53:55,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.9859154929577465) internal successors, (141), 70 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:53:55,732 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2022-01-31 22:53:55,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-01-31 22:53:55,733 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:53:55,733 INFO L514 BasicCegarLoop]: trace histogram [68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:53:55,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-01-31 22:53:55,733 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:53:55,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:53:55,733 INFO L85 PathProgramCache]: Analyzing trace with hash -855042667, now seen corresponding path program 68 times [2022-01-31 22:53:55,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:53:55,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [396095552] [2022-01-31 22:53:55,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:53:55,734 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:53:55,734 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:53:55,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:53:55,735 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:53:55,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:53:57,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:53:57,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:53:57,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:53:57,279 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:53:57,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [396095552] [2022-01-31 22:53:57,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [396095552] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:53:57,279 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:53:57,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-01-31 22:53:57,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105434869] [2022-01-31 22:53:57,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:53:57,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-01-31 22:53:57,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:53:57,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-01-31 22:53:57,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 22:53:57,280 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand has 72 states, 72 states have (on average 1.9861111111111112) internal successors, (143), 71 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:53:58,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:53:58,646 INFO L93 Difference]: Finished difference Result 156 states and 156 transitions. [2022-01-31 22:53:58,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-31 22:53:58,646 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.9861111111111112) internal successors, (143), 71 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 147 [2022-01-31 22:53:58,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:53:58,647 INFO L225 Difference]: With dead ends: 156 [2022-01-31 22:53:58,647 INFO L226 Difference]: Without dead ends: 151 [2022-01-31 22:53:58,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2414 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=7455, Invalid=12285, Unknown=0, NotChecked=0, Total=19740 [2022-01-31 22:53:58,648 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 145 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:53:58,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 28 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:53:58,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-01-31 22:53:58,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 150. [2022-01-31 22:53:58,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 145 states have (on average 1.006896551724138) internal successors, (146), 145 states have internal predecessors, (146), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:53:58,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 150 transitions. [2022-01-31 22:53:58,678 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 150 transitions. Word has length 147 [2022-01-31 22:53:58,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:53:58,679 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 150 transitions. [2022-01-31 22:53:58,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.9861111111111112) internal successors, (143), 71 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:53:58,679 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 150 transitions. [2022-01-31 22:53:58,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-01-31 22:53:58,679 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:53:58,679 INFO L514 BasicCegarLoop]: trace histogram [69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:53:58,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-01-31 22:53:58,679 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:53:58,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:53:58,680 INFO L85 PathProgramCache]: Analyzing trace with hash -221888589, now seen corresponding path program 69 times [2022-01-31 22:53:58,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:53:58,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1151462168] [2022-01-31 22:53:58,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:53:58,682 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:53:58,682 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:53:58,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:53:58,682 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:53:58,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:54:00,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:54:00,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:54:00,296 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 22:54:00,296 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:54:00,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1151462168] [2022-01-31 22:54:00,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1151462168] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:54:00,296 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:54:00,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-01-31 22:54:00,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929392708] [2022-01-31 22:54:00,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:54:00,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-01-31 22:54:00,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:54:00,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-01-31 22:54:00,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 22:54:00,297 INFO L87 Difference]: Start difference. First operand 150 states and 150 transitions. Second operand has 73 states, 73 states have (on average 1.9863013698630136) internal successors, (145), 72 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:54:01,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:54:01,929 INFO L93 Difference]: Finished difference Result 158 states and 158 transitions. [2022-01-31 22:54:01,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-31 22:54:01,930 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.9863013698630136) internal successors, (145), 72 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 149 [2022-01-31 22:54:01,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:54:01,930 INFO L225 Difference]: With dead ends: 158 [2022-01-31 22:54:01,930 INFO L226 Difference]: Without dead ends: 153 [2022-01-31 22:54:01,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2484 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=7668, Invalid=12638, Unknown=0, NotChecked=0, Total=20306 [2022-01-31 22:54:01,931 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 147 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:54:01,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 43 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:54:01,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-01-31 22:54:01,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 152. [2022-01-31 22:54:01,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 147 states have (on average 1.0068027210884354) internal successors, (148), 147 states have internal predecessors, (148), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:54:01,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 152 transitions. [2022-01-31 22:54:01,966 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 152 transitions. Word has length 149 [2022-01-31 22:54:01,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:54:01,966 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 152 transitions. [2022-01-31 22:54:01,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.9863013698630136) internal successors, (145), 72 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:54:01,966 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 152 transitions. [2022-01-31 22:54:01,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-01-31 22:54:01,967 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:54:01,967 INFO L514 BasicCegarLoop]: trace histogram [70, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:54:01,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-01-31 22:54:01,967 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:54:01,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:54:01,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1646175663, now seen corresponding path program 70 times [2022-01-31 22:54:01,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:54:01,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1098052165] [2022-01-31 22:54:01,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:54:01,969 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:54:01,970 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:54:01,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:54:01,974 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:54:02,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:54:03,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:54:03,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:54:03,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:54:03,375 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:54:03,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1098052165] [2022-01-31 22:54:03,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1098052165] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:54:03,375 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:54:03,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-01-31 22:54:03,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586028498] [2022-01-31 22:54:03,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:54:03,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-01-31 22:54:03,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:54:03,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-01-31 22:54:03,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 22:54:03,376 INFO L87 Difference]: Start difference. First operand 152 states and 152 transitions. Second operand has 74 states, 74 states have (on average 1.9864864864864864) internal successors, (147), 73 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:54:04,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:54:04,999 INFO L93 Difference]: Finished difference Result 160 states and 160 transitions. [2022-01-31 22:54:04,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-31 22:54:05,000 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.9864864864864864) internal successors, (147), 73 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 151 [2022-01-31 22:54:05,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:54:05,000 INFO L225 Difference]: With dead ends: 160 [2022-01-31 22:54:05,000 INFO L226 Difference]: Without dead ends: 155 [2022-01-31 22:54:05,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2555 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=7884, Invalid=12996, Unknown=0, NotChecked=0, Total=20880 [2022-01-31 22:54:05,001 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 149 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:54:05,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 38 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:54:05,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-01-31 22:54:05,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 154. [2022-01-31 22:54:05,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 149 states have (on average 1.0067114093959733) internal successors, (150), 149 states have internal predecessors, (150), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:54:05,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 154 transitions. [2022-01-31 22:54:05,033 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 154 transitions. Word has length 151 [2022-01-31 22:54:05,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:54:05,033 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 154 transitions. [2022-01-31 22:54:05,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.9864864864864864) internal successors, (147), 73 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:54:05,033 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 154 transitions. [2022-01-31 22:54:05,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-01-31 22:54:05,034 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:54:05,034 INFO L514 BasicCegarLoop]: trace histogram [71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:54:05,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-01-31 22:54:05,034 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:54:05,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:54:05,034 INFO L85 PathProgramCache]: Analyzing trace with hash -291486353, now seen corresponding path program 71 times [2022-01-31 22:54:05,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:54:05,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [748014298] [2022-01-31 22:54:05,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:54:05,035 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:54:05,035 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:54:05,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:54:05,036 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:54:05,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:54:06,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:54:06,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:54:06,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:54:06,512 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:54:06,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [748014298] [2022-01-31 22:54:06,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [748014298] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:54:06,512 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:54:06,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-01-31 22:54:06,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579008442] [2022-01-31 22:54:06,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:54:06,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-01-31 22:54:06,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:54:06,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-01-31 22:54:06,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 22:54:06,514 INFO L87 Difference]: Start difference. First operand 154 states and 154 transitions. Second operand has 75 states, 75 states have (on average 1.9866666666666666) internal successors, (149), 74 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:54:08,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:54:08,041 INFO L93 Difference]: Finished difference Result 162 states and 162 transitions. [2022-01-31 22:54:08,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-31 22:54:08,041 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.9866666666666666) internal successors, (149), 74 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 153 [2022-01-31 22:54:08,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:54:08,042 INFO L225 Difference]: With dead ends: 162 [2022-01-31 22:54:08,042 INFO L226 Difference]: Without dead ends: 157 [2022-01-31 22:54:08,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2627 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=8103, Invalid=13359, Unknown=0, NotChecked=0, Total=21462 [2022-01-31 22:54:08,043 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 151 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:54:08,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 43 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:54:08,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-01-31 22:54:08,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 156. [2022-01-31 22:54:08,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 151 states have (on average 1.0066225165562914) internal successors, (152), 151 states have internal predecessors, (152), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:54:08,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 156 transitions. [2022-01-31 22:54:08,076 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 156 transitions. Word has length 153 [2022-01-31 22:54:08,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:54:08,076 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 156 transitions. [2022-01-31 22:54:08,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.9866666666666666) internal successors, (149), 74 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:54:08,076 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 156 transitions. [2022-01-31 22:54:08,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-01-31 22:54:08,076 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:54:08,077 INFO L514 BasicCegarLoop]: trace histogram [72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:54:08,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-01-31 22:54:08,077 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:54:08,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:54:08,077 INFO L85 PathProgramCache]: Analyzing trace with hash 189849869, now seen corresponding path program 72 times [2022-01-31 22:54:08,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:54:08,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [820038907] [2022-01-31 22:54:08,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:54:08,078 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:54:08,078 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:54:08,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:54:08,079 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:54:08,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:54:09,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:54:09,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:54:09,137 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 22:54:09,137 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:54:09,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [820038907] [2022-01-31 22:54:09,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [820038907] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:54:09,137 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:54:09,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-01-31 22:54:09,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345214069] [2022-01-31 22:54:09,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:54:09,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-01-31 22:54:09,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:54:09,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-01-31 22:54:09,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 22:54:09,138 INFO L87 Difference]: Start difference. First operand 156 states and 156 transitions. Second operand has 76 states, 76 states have (on average 1.986842105263158) internal successors, (151), 75 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:54:10,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:54:10,604 INFO L93 Difference]: Finished difference Result 164 states and 164 transitions. [2022-01-31 22:54:10,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-31 22:54:10,605 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.986842105263158) internal successors, (151), 75 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 155 [2022-01-31 22:54:10,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:54:10,605 INFO L225 Difference]: With dead ends: 164 [2022-01-31 22:54:10,605 INFO L226 Difference]: Without dead ends: 159 [2022-01-31 22:54:10,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2700 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=8325, Invalid=13727, Unknown=0, NotChecked=0, Total=22052 [2022-01-31 22:54:10,607 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 153 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:54:10,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 38 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:54:10,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-01-31 22:54:10,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 158. [2022-01-31 22:54:10,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 153 states have (on average 1.0065359477124183) internal successors, (154), 153 states have internal predecessors, (154), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:54:10,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 158 transitions. [2022-01-31 22:54:10,641 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 158 transitions. Word has length 155 [2022-01-31 22:54:10,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:54:10,641 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 158 transitions. [2022-01-31 22:54:10,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 1.986842105263158) internal successors, (151), 75 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:54:10,641 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 158 transitions. [2022-01-31 22:54:10,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-01-31 22:54:10,642 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:54:10,642 INFO L514 BasicCegarLoop]: trace histogram [73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:54:10,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-01-31 22:54:10,642 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:54:10,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:54:10,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1102508757, now seen corresponding path program 73 times [2022-01-31 22:54:10,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:54:10,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [897403936] [2022-01-31 22:54:10,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:54:10,643 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:54:10,643 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:54:10,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:54:10,644 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:54:10,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:54:11,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:54:11,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:54:11,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:54:11,739 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:54:11,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [897403936] [2022-01-31 22:54:11,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [897403936] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:54:11,740 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:54:11,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-01-31 22:54:11,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136144175] [2022-01-31 22:54:11,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:54:11,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-01-31 22:54:11,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:54:11,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-01-31 22:54:11,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 22:54:11,741 INFO L87 Difference]: Start difference. First operand 158 states and 158 transitions. Second operand has 77 states, 77 states have (on average 1.9870129870129871) internal successors, (153), 76 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:54:13,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:54:13,270 INFO L93 Difference]: Finished difference Result 166 states and 166 transitions. [2022-01-31 22:54:13,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-31 22:54:13,270 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.9870129870129871) internal successors, (153), 76 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 157 [2022-01-31 22:54:13,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:54:13,271 INFO L225 Difference]: With dead ends: 166 [2022-01-31 22:54:13,271 INFO L226 Difference]: Without dead ends: 161 [2022-01-31 22:54:13,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2774 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=8550, Invalid=14100, Unknown=0, NotChecked=0, Total=22650 [2022-01-31 22:54:13,273 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 155 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:54:13,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 38 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:54:13,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-01-31 22:54:13,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2022-01-31 22:54:13,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 155 states have (on average 1.0064516129032257) internal successors, (156), 155 states have internal predecessors, (156), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:54:13,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 160 transitions. [2022-01-31 22:54:13,330 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 160 transitions. Word has length 157 [2022-01-31 22:54:13,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:54:13,330 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 160 transitions. [2022-01-31 22:54:13,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 1.9870129870129871) internal successors, (153), 76 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:54:13,330 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 160 transitions. [2022-01-31 22:54:13,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-01-31 22:54:13,331 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:54:13,331 INFO L514 BasicCegarLoop]: trace histogram [74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:54:13,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-01-31 22:54:13,332 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:54:13,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:54:13,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1813599799, now seen corresponding path program 74 times [2022-01-31 22:54:13,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:54:13,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [578483672] [2022-01-31 22:54:13,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:54:13,333 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:54:13,333 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:54:13,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:54:13,334 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:54:13,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:54:14,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:54:14,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:54:14,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:54:14,633 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:54:14,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [578483672] [2022-01-31 22:54:14,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [578483672] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:54:14,633 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:54:14,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-01-31 22:54:14,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356902586] [2022-01-31 22:54:14,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:54:14,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-01-31 22:54:14,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:54:14,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-01-31 22:54:14,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 22:54:14,635 INFO L87 Difference]: Start difference. First operand 160 states and 160 transitions. Second operand has 78 states, 78 states have (on average 1.9871794871794872) internal successors, (155), 77 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:54:16,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:54:16,067 INFO L93 Difference]: Finished difference Result 168 states and 168 transitions. [2022-01-31 22:54:16,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-31 22:54:16,067 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.9871794871794872) internal successors, (155), 77 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 159 [2022-01-31 22:54:16,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:54:16,068 INFO L225 Difference]: With dead ends: 168 [2022-01-31 22:54:16,068 INFO L226 Difference]: Without dead ends: 163 [2022-01-31 22:54:16,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2849 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=8778, Invalid=14478, Unknown=0, NotChecked=0, Total=23256 [2022-01-31 22:54:16,070 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 157 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:54:16,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 38 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:54:16,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-01-31 22:54:16,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2022-01-31 22:54:16,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 157 states have (on average 1.0063694267515924) internal successors, (158), 157 states have internal predecessors, (158), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:54:16,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 162 transitions. [2022-01-31 22:54:16,113 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 162 transitions. Word has length 159 [2022-01-31 22:54:16,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:54:16,113 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 162 transitions. [2022-01-31 22:54:16,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 1.9871794871794872) internal successors, (155), 77 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:54:16,113 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 162 transitions. [2022-01-31 22:54:16,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-01-31 22:54:16,113 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:54:16,114 INFO L514 BasicCegarLoop]: trace histogram [75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:54:16,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-01-31 22:54:16,114 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:54:16,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:54:16,114 INFO L85 PathProgramCache]: Analyzing trace with hash 2022676199, now seen corresponding path program 75 times [2022-01-31 22:54:16,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:54:16,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [351727430] [2022-01-31 22:54:16,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:54:16,115 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:54:16,115 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:54:16,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:54:16,116 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:54:16,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:54:17,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:54:17,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:54:17,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:54:17,806 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:54:17,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [351727430] [2022-01-31 22:54:17,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [351727430] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:54:17,807 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:54:17,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-01-31 22:54:17,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100752070] [2022-01-31 22:54:17,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:54:17,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-01-31 22:54:17,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:54:17,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-01-31 22:54:17,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3005, Invalid=3157, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 22:54:17,809 INFO L87 Difference]: Start difference. First operand 162 states and 162 transitions. Second operand has 79 states, 79 states have (on average 1.9873417721518987) internal successors, (157), 78 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:54:20,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:54:20,100 INFO L93 Difference]: Finished difference Result 170 states and 170 transitions. [2022-01-31 22:54:20,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-31 22:54:20,100 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.9873417721518987) internal successors, (157), 78 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 161 [2022-01-31 22:54:20,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:54:20,101 INFO L225 Difference]: With dead ends: 170 [2022-01-31 22:54:20,101 INFO L226 Difference]: Without dead ends: 165 [2022-01-31 22:54:20,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2925 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=9009, Invalid=14861, Unknown=0, NotChecked=0, Total=23870 [2022-01-31 22:54:20,102 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 159 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:54:20,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 53 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:54:20,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-01-31 22:54:20,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2022-01-31 22:54:20,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 159 states have (on average 1.0062893081761006) internal successors, (160), 159 states have internal predecessors, (160), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:54:20,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 164 transitions. [2022-01-31 22:54:20,139 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 164 transitions. Word has length 161 [2022-01-31 22:54:20,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:54:20,140 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 164 transitions. [2022-01-31 22:54:20,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 1.9873417721518987) internal successors, (157), 78 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:54:20,140 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 164 transitions. [2022-01-31 22:54:20,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-01-31 22:54:20,155 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:54:20,156 INFO L514 BasicCegarLoop]: trace histogram [76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:54:20,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-01-31 22:54:20,156 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:54:20,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:54:20,156 INFO L85 PathProgramCache]: Analyzing trace with hash -692996987, now seen corresponding path program 76 times [2022-01-31 22:54:20,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:54:20,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1339249380] [2022-01-31 22:54:20,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:54:20,157 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:54:20,158 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:54:20,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:54:20,160 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:54:20,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:54:21,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:54:21,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:54:21,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:54:21,894 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:54:21,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1339249380] [2022-01-31 22:54:21,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1339249380] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:54:21,894 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:54:21,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-01-31 22:54:21,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414005220] [2022-01-31 22:54:21,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:54:21,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-01-31 22:54:21,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:54:21,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-01-31 22:54:21,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 22:54:21,896 INFO L87 Difference]: Start difference. First operand 164 states and 164 transitions. Second operand has 80 states, 80 states have (on average 1.9875) internal successors, (159), 79 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:54:23,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:54:23,407 INFO L93 Difference]: Finished difference Result 172 states and 172 transitions. [2022-01-31 22:54:23,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-01-31 22:54:23,407 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.9875) internal successors, (159), 79 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 163 [2022-01-31 22:54:23,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:54:23,408 INFO L225 Difference]: With dead ends: 172 [2022-01-31 22:54:23,408 INFO L226 Difference]: Without dead ends: 167 [2022-01-31 22:54:23,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3002 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=9243, Invalid=15249, Unknown=0, NotChecked=0, Total=24492 [2022-01-31 22:54:23,409 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 161 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:54:23,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 43 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:54:23,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-01-31 22:54:23,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 166. [2022-01-31 22:54:23,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 161 states have (on average 1.0062111801242235) internal successors, (162), 161 states have internal predecessors, (162), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:54:23,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 166 transitions. [2022-01-31 22:54:23,446 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 166 transitions. Word has length 163 [2022-01-31 22:54:23,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:54:23,446 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 166 transitions. [2022-01-31 22:54:23,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.9875) internal successors, (159), 79 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:54:23,446 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 166 transitions. [2022-01-31 22:54:23,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-01-31 22:54:23,447 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:54:23,447 INFO L514 BasicCegarLoop]: trace histogram [77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:54:23,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-01-31 22:54:23,447 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:54:23,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:54:23,447 INFO L85 PathProgramCache]: Analyzing trace with hash 885187235, now seen corresponding path program 77 times [2022-01-31 22:54:23,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:54:23,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [145158841] [2022-01-31 22:54:23,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:54:23,448 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:54:23,448 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:54:23,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:54:23,449 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:54:23,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:54:25,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:54:25,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:54:25,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:54:25,280 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:54:25,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [145158841] [2022-01-31 22:54:25,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [145158841] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:54:25,280 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:54:25,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-01-31 22:54:25,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258063897] [2022-01-31 22:54:25,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:54:25,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-01-31 22:54:25,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:54:25,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-01-31 22:54:25,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3162, Invalid=3318, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 22:54:25,282 INFO L87 Difference]: Start difference. First operand 166 states and 166 transitions. Second operand has 81 states, 81 states have (on average 1.9876543209876543) internal successors, (161), 80 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:54:26,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:54:26,942 INFO L93 Difference]: Finished difference Result 174 states and 174 transitions. [2022-01-31 22:54:26,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-01-31 22:54:26,942 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.9876543209876543) internal successors, (161), 80 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 165 [2022-01-31 22:54:26,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:54:26,943 INFO L225 Difference]: With dead ends: 174 [2022-01-31 22:54:26,943 INFO L226 Difference]: Without dead ends: 169 [2022-01-31 22:54:26,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3080 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=9480, Invalid=15642, Unknown=0, NotChecked=0, Total=25122 [2022-01-31 22:54:26,945 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 163 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:54:26,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 38 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:54:26,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-01-31 22:54:27,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 168. [2022-01-31 22:54:27,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 163 states have (on average 1.0061349693251533) internal successors, (164), 163 states have internal predecessors, (164), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:54:27,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 168 transitions. [2022-01-31 22:54:27,017 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 168 transitions. Word has length 165 [2022-01-31 22:54:27,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:54:27,017 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 168 transitions. [2022-01-31 22:54:27,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.9876543209876543) internal successors, (161), 80 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:54:27,017 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 168 transitions. [2022-01-31 22:54:27,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-01-31 22:54:27,018 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:54:27,018 INFO L514 BasicCegarLoop]: trace histogram [78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:54:27,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-01-31 22:54:27,018 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:54:27,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:54:27,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1396769089, now seen corresponding path program 78 times [2022-01-31 22:54:27,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:54:27,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [785976558] [2022-01-31 22:54:27,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:54:27,020 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:54:27,020 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:54:27,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:54:27,021 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:54:27,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:54:28,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:54:28,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:54:28,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:54:28,824 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:54:28,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [785976558] [2022-01-31 22:54:28,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [785976558] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:54:28,824 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:54:28,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-01-31 22:54:28,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236132457] [2022-01-31 22:54:28,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:54:28,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-01-31 22:54:28,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:54:28,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-01-31 22:54:28,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2022-01-31 22:54:28,826 INFO L87 Difference]: Start difference. First operand 168 states and 168 transitions. Second operand has 82 states, 82 states have (on average 1.9878048780487805) internal successors, (163), 81 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:54:30,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:54:30,410 INFO L93 Difference]: Finished difference Result 176 states and 176 transitions. [2022-01-31 22:54:30,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-31 22:54:30,410 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 1.9878048780487805) internal successors, (163), 81 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 167 [2022-01-31 22:54:30,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:54:30,411 INFO L225 Difference]: With dead ends: 176 [2022-01-31 22:54:30,411 INFO L226 Difference]: Without dead ends: 171 [2022-01-31 22:54:30,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3159 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=9720, Invalid=16040, Unknown=0, NotChecked=0, Total=25760 [2022-01-31 22:54:30,412 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 165 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:54:30,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 38 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:54:30,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-01-31 22:54:30,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 170. [2022-01-31 22:54:30,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 165 states have (on average 1.006060606060606) internal successors, (166), 165 states have internal predecessors, (166), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:54:30,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 170 transitions. [2022-01-31 22:54:30,451 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 170 transitions. Word has length 167 [2022-01-31 22:54:30,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:54:30,451 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 170 transitions. [2022-01-31 22:54:30,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 1.9878048780487805) internal successors, (163), 81 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:54:30,451 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 170 transitions. [2022-01-31 22:54:30,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-01-31 22:54:30,452 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:54:30,452 INFO L514 BasicCegarLoop]: trace histogram [79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:54:30,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-01-31 22:54:30,452 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:54:30,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:54:30,452 INFO L85 PathProgramCache]: Analyzing trace with hash -894308257, now seen corresponding path program 79 times [2022-01-31 22:54:30,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:54:30,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [571211200] [2022-01-31 22:54:30,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:54:30,454 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:54:30,454 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:54:30,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:54:30,455 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:54:30,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:54:31,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:54:31,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:54:31,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:54:31,751 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:54:31,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [571211200] [2022-01-31 22:54:31,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [571211200] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:54:31,752 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:54:31,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-01-31 22:54:31,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910777836] [2022-01-31 22:54:31,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:54:31,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-01-31 22:54:31,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:54:31,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-01-31 22:54:31,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3323, Invalid=3483, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 22:54:31,753 INFO L87 Difference]: Start difference. First operand 170 states and 170 transitions. Second operand has 83 states, 83 states have (on average 1.9879518072289157) internal successors, (165), 82 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:54:33,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:54:33,895 INFO L93 Difference]: Finished difference Result 178 states and 178 transitions. [2022-01-31 22:54:33,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-01-31 22:54:33,896 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.9879518072289157) internal successors, (165), 82 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 169 [2022-01-31 22:54:33,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:54:33,896 INFO L225 Difference]: With dead ends: 178 [2022-01-31 22:54:33,896 INFO L226 Difference]: Without dead ends: 173 [2022-01-31 22:54:33,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3239 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=9963, Invalid=16443, Unknown=0, NotChecked=0, Total=26406 [2022-01-31 22:54:33,898 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 167 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:54:33,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 28 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:54:33,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-01-31 22:54:33,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 172. [2022-01-31 22:54:33,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 167 states have (on average 1.0059880239520957) internal successors, (168), 167 states have internal predecessors, (168), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:54:33,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 172 transitions. [2022-01-31 22:54:33,950 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 172 transitions. Word has length 169 [2022-01-31 22:54:33,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:54:33,950 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 172 transitions. [2022-01-31 22:54:33,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 1.9879518072289157) internal successors, (165), 82 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:54:33,950 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 172 transitions. [2022-01-31 22:54:33,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-01-31 22:54:33,951 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:54:33,951 INFO L514 BasicCegarLoop]: trace histogram [80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:54:33,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-01-31 22:54:33,952 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:54:33,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:54:33,952 INFO L85 PathProgramCache]: Analyzing trace with hash 698585085, now seen corresponding path program 80 times [2022-01-31 22:54:33,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:54:33,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [222010686] [2022-01-31 22:54:33,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:54:33,953 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:54:33,953 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:54:33,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:54:33,954 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:54:33,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:54:35,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:54:35,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:54:35,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:54:35,949 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:54:35,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [222010686] [2022-01-31 22:54:35,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [222010686] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:54:35,949 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:54:35,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-01-31 22:54:35,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387291007] [2022-01-31 22:54:35,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:54:35,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-01-31 22:54:35,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:54:35,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-01-31 22:54:35,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 22:54:35,951 INFO L87 Difference]: Start difference. First operand 172 states and 172 transitions. Second operand has 84 states, 84 states have (on average 1.9880952380952381) internal successors, (167), 83 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:54:37,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:54:37,981 INFO L93 Difference]: Finished difference Result 180 states and 180 transitions. [2022-01-31 22:54:37,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-31 22:54:37,982 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.9880952380952381) internal successors, (167), 83 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 171 [2022-01-31 22:54:37,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:54:37,982 INFO L225 Difference]: With dead ends: 180 [2022-01-31 22:54:37,982 INFO L226 Difference]: Without dead ends: 175 [2022-01-31 22:54:37,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3320 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=10209, Invalid=16851, Unknown=0, NotChecked=0, Total=27060 [2022-01-31 22:54:37,984 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 169 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:54:37,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 38 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:54:37,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-01-31 22:54:38,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 174. [2022-01-31 22:54:38,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 169 states have (on average 1.0059171597633136) internal successors, (170), 169 states have internal predecessors, (170), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:54:38,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 174 transitions. [2022-01-31 22:54:38,024 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 174 transitions. Word has length 171 [2022-01-31 22:54:38,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:54:38,024 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 174 transitions. [2022-01-31 22:54:38,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.9880952380952381) internal successors, (167), 83 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:54:38,025 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 174 transitions. [2022-01-31 22:54:38,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-01-31 22:54:38,025 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:54:38,025 INFO L514 BasicCegarLoop]: trace histogram [81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:54:38,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-01-31 22:54:38,025 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:54:38,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:54:38,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1834237925, now seen corresponding path program 81 times [2022-01-31 22:54:38,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:54:38,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1077301081] [2022-01-31 22:54:38,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:54:38,027 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:54:38,027 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:54:38,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:54:38,028 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:54:38,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:54:40,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:54:40,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:54:40,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:54:40,111 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:54:40,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1077301081] [2022-01-31 22:54:40,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1077301081] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:54:40,111 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:54:40,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-01-31 22:54:40,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977597672] [2022-01-31 22:54:40,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:54:40,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-01-31 22:54:40,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:54:40,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-01-31 22:54:40,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3488, Invalid=3652, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 22:54:40,113 INFO L87 Difference]: Start difference. First operand 174 states and 174 transitions. Second operand has 85 states, 85 states have (on average 1.988235294117647) internal successors, (169), 84 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:54:42,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:54:42,059 INFO L93 Difference]: Finished difference Result 182 states and 182 transitions. [2022-01-31 22:54:42,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-01-31 22:54:42,059 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.988235294117647) internal successors, (169), 84 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 173 [2022-01-31 22:54:42,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:54:42,060 INFO L225 Difference]: With dead ends: 182 [2022-01-31 22:54:42,060 INFO L226 Difference]: Without dead ends: 177 [2022-01-31 22:54:42,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3402 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=10458, Invalid=17264, Unknown=0, NotChecked=0, Total=27722 [2022-01-31 22:54:42,061 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 171 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:54:42,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 53 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:54:42,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-01-31 22:54:42,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 176. [2022-01-31 22:54:42,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 171 states have (on average 1.0058479532163742) internal successors, (172), 171 states have internal predecessors, (172), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:54:42,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 176 transitions. [2022-01-31 22:54:42,107 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 176 transitions. Word has length 173 [2022-01-31 22:54:42,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:54:42,107 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 176 transitions. [2022-01-31 22:54:42,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.988235294117647) internal successors, (169), 84 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:54:42,107 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 176 transitions. [2022-01-31 22:54:42,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-01-31 22:54:42,108 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:54:42,108 INFO L514 BasicCegarLoop]: trace histogram [82, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:54:42,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-01-31 22:54:42,108 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:54:42,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:54:42,108 INFO L85 PathProgramCache]: Analyzing trace with hash -630693703, now seen corresponding path program 82 times [2022-01-31 22:54:42,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:54:42,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [7885720] [2022-01-31 22:54:42,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:54:42,110 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:54:42,110 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:54:42,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:54:42,111 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:54:42,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:54:43,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:54:43,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:54:43,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:54:43,468 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:54:43,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [7885720] [2022-01-31 22:54:43,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [7885720] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:54:43,469 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:54:43,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-01-31 22:54:43,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298997813] [2022-01-31 22:54:43,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:54:43,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-01-31 22:54:43,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:54:43,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-01-31 22:54:43,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2022-01-31 22:54:43,470 INFO L87 Difference]: Start difference. First operand 176 states and 176 transitions. Second operand has 86 states, 86 states have (on average 1.9883720930232558) internal successors, (171), 85 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:54:45,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:54:45,466 INFO L93 Difference]: Finished difference Result 184 states and 184 transitions. [2022-01-31 22:54:45,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-31 22:54:45,467 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 1.9883720930232558) internal successors, (171), 85 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 175 [2022-01-31 22:54:45,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:54:45,467 INFO L225 Difference]: With dead ends: 184 [2022-01-31 22:54:45,467 INFO L226 Difference]: Without dead ends: 179 [2022-01-31 22:54:45,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3485 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=10710, Invalid=17682, Unknown=0, NotChecked=0, Total=28392 [2022-01-31 22:54:45,469 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 173 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:54:45,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 48 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:54:45,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-01-31 22:54:45,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 178. [2022-01-31 22:54:45,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 173 states have (on average 1.0057803468208093) internal successors, (174), 173 states have internal predecessors, (174), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:54:45,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 178 transitions. [2022-01-31 22:54:45,525 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 178 transitions. Word has length 175 [2022-01-31 22:54:45,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:54:45,526 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 178 transitions. [2022-01-31 22:54:45,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 1.9883720930232558) internal successors, (171), 85 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:54:45,526 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 178 transitions. [2022-01-31 22:54:45,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-01-31 22:54:45,526 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:54:45,526 INFO L514 BasicCegarLoop]: trace histogram [83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:54:45,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-01-31 22:54:45,527 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:54:45,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:54:45,527 INFO L85 PathProgramCache]: Analyzing trace with hash 629101015, now seen corresponding path program 83 times [2022-01-31 22:54:45,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:54:45,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [801147625] [2022-01-31 22:54:45,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:54:45,528 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:54:45,528 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:54:45,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:54:45,529 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:54:45,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:54:47,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:54:47,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:54:47,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:54:47,608 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:54:47,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [801147625] [2022-01-31 22:54:47,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [801147625] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:54:47,608 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:54:47,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-01-31 22:54:47,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112240135] [2022-01-31 22:54:47,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:54:47,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-01-31 22:54:47,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:54:47,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-01-31 22:54:47,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3657, Invalid=3825, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 22:54:47,610 INFO L87 Difference]: Start difference. First operand 178 states and 178 transitions. Second operand has 87 states, 87 states have (on average 1.9885057471264367) internal successors, (173), 86 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:54:49,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:54:49,579 INFO L93 Difference]: Finished difference Result 186 states and 186 transitions. [2022-01-31 22:54:49,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-01-31 22:54:49,579 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.9885057471264367) internal successors, (173), 86 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 177 [2022-01-31 22:54:49,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:54:49,580 INFO L225 Difference]: With dead ends: 186 [2022-01-31 22:54:49,580 INFO L226 Difference]: Without dead ends: 181 [2022-01-31 22:54:49,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3569 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=10965, Invalid=18105, Unknown=0, NotChecked=0, Total=29070 [2022-01-31 22:54:49,582 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 175 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:54:49,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 48 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:54:49,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-01-31 22:54:49,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 180. [2022-01-31 22:54:49,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 175 states have (on average 1.0057142857142858) internal successors, (176), 175 states have internal predecessors, (176), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:54:49,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 180 transitions. [2022-01-31 22:54:49,642 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 180 transitions. Word has length 177 [2022-01-31 22:54:49,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:54:49,643 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 180 transitions. [2022-01-31 22:54:49,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 1.9885057471264367) internal successors, (173), 86 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:54:49,643 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 180 transitions. [2022-01-31 22:54:49,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-01-31 22:54:49,644 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:54:49,644 INFO L514 BasicCegarLoop]: trace histogram [84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:54:49,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-01-31 22:54:49,644 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:54:49,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:54:49,644 INFO L85 PathProgramCache]: Analyzing trace with hash 111047541, now seen corresponding path program 84 times [2022-01-31 22:54:49,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:54:49,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1127270823] [2022-01-31 22:54:49,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:54:49,646 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:54:49,646 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:54:49,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:54:49,647 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:54:49,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:54:51,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:54:51,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:54:51,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:54:51,308 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:54:51,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1127270823] [2022-01-31 22:54:51,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1127270823] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:54:51,308 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:54:51,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-01-31 22:54:51,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035359760] [2022-01-31 22:54:51,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:54:51,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-01-31 22:54:51,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:54:51,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-01-31 22:54:51,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2022-01-31 22:54:51,311 INFO L87 Difference]: Start difference. First operand 180 states and 180 transitions. Second operand has 88 states, 88 states have (on average 1.9886363636363635) internal successors, (175), 87 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:54:53,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:54:53,105 INFO L93 Difference]: Finished difference Result 188 states and 188 transitions. [2022-01-31 22:54:53,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-01-31 22:54:53,106 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 1.9886363636363635) internal successors, (175), 87 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 179 [2022-01-31 22:54:53,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:54:53,109 INFO L225 Difference]: With dead ends: 188 [2022-01-31 22:54:53,109 INFO L226 Difference]: Without dead ends: 183 [2022-01-31 22:54:53,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3654 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=11223, Invalid=18533, Unknown=0, NotChecked=0, Total=29756 [2022-01-31 22:54:53,111 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 177 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:54:53,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 33 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:54:53,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-01-31 22:54:53,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 182. [2022-01-31 22:54:53,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 177 states have (on average 1.0056497175141244) internal successors, (178), 177 states have internal predecessors, (178), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:54:53,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 182 transitions. [2022-01-31 22:54:53,164 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 182 transitions. Word has length 179 [2022-01-31 22:54:53,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:54:53,164 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 182 transitions. [2022-01-31 22:54:53,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 1.9886363636363635) internal successors, (175), 87 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:54:53,164 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 182 transitions. [2022-01-31 22:54:53,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-01-31 22:54:53,165 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:54:53,165 INFO L514 BasicCegarLoop]: trace histogram [85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:54:53,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-01-31 22:54:53,165 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:54:53,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:54:53,165 INFO L85 PathProgramCache]: Analyzing trace with hash 477865363, now seen corresponding path program 85 times [2022-01-31 22:54:53,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:54:53,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [292741002] [2022-01-31 22:54:53,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:54:53,167 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:54:53,167 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:54:53,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:54:53,167 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:54:53,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:54:55,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:54:55,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:54:55,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:54:55,539 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:54:55,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [292741002] [2022-01-31 22:54:55,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [292741002] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:54:55,539 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:54:55,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-01-31 22:54:55,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723352061] [2022-01-31 22:54:55,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:54:55,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-01-31 22:54:55,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:54:55,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-01-31 22:54:55,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3830, Invalid=4002, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 22:54:55,542 INFO L87 Difference]: Start difference. First operand 182 states and 182 transitions. Second operand has 89 states, 89 states have (on average 1.9887640449438202) internal successors, (177), 88 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:54:57,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:54:57,719 INFO L93 Difference]: Finished difference Result 190 states and 190 transitions. [2022-01-31 22:54:57,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-31 22:54:57,719 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 1.9887640449438202) internal successors, (177), 88 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 181 [2022-01-31 22:54:57,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:54:57,720 INFO L225 Difference]: With dead ends: 190 [2022-01-31 22:54:57,720 INFO L226 Difference]: Without dead ends: 185 [2022-01-31 22:54:57,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3740 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=11484, Invalid=18966, Unknown=0, NotChecked=0, Total=30450 [2022-01-31 22:54:57,721 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 179 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:54:57,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 23 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:54:57,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-01-31 22:54:57,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 184. [2022-01-31 22:54:57,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 179 states have (on average 1.005586592178771) internal successors, (180), 179 states have internal predecessors, (180), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:54:57,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 184 transitions. [2022-01-31 22:54:57,767 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 184 transitions. Word has length 181 [2022-01-31 22:54:57,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:54:57,767 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 184 transitions. [2022-01-31 22:54:57,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 1.9887640449438202) internal successors, (177), 88 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:54:57,768 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 184 transitions. [2022-01-31 22:54:57,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-01-31 22:54:57,768 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:54:57,768 INFO L514 BasicCegarLoop]: trace histogram [86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:54:57,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-01-31 22:54:57,768 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:54:57,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:54:57,769 INFO L85 PathProgramCache]: Analyzing trace with hash 802474033, now seen corresponding path program 86 times [2022-01-31 22:54:57,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:54:57,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1621713092] [2022-01-31 22:54:57,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:54:57,770 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:54:57,770 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:54:57,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:54:57,771 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:54:57,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:55:00,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:55:00,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:55:00,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:55:00,194 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:55:00,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1621713092] [2022-01-31 22:55:00,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1621713092] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:55:00,194 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:55:00,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-01-31 22:55:00,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388755384] [2022-01-31 22:55:00,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:55:00,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-01-31 22:55:00,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:55:00,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-01-31 22:55:00,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3918, Invalid=4092, Unknown=0, NotChecked=0, Total=8010 [2022-01-31 22:55:00,197 INFO L87 Difference]: Start difference. First operand 184 states and 184 transitions. Second operand has 90 states, 90 states have (on average 1.988888888888889) internal successors, (179), 89 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:55:02,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:55:02,919 INFO L93 Difference]: Finished difference Result 192 states and 192 transitions. [2022-01-31 22:55:02,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-01-31 22:55:02,919 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 1.988888888888889) internal successors, (179), 89 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 183 [2022-01-31 22:55:02,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:55:02,920 INFO L225 Difference]: With dead ends: 192 [2022-01-31 22:55:02,920 INFO L226 Difference]: Without dead ends: 187 [2022-01-31 22:55:02,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3827 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=11748, Invalid=19404, Unknown=0, NotChecked=0, Total=31152 [2022-01-31 22:55:02,921 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 181 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:55:02,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 43 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:55:02,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-01-31 22:55:02,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 186. [2022-01-31 22:55:02,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 181 states have (on average 1.0055248618784531) internal successors, (182), 181 states have internal predecessors, (182), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:55:02,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 186 transitions. [2022-01-31 22:55:02,969 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 186 transitions. Word has length 183 [2022-01-31 22:55:02,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:55:02,969 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 186 transitions. [2022-01-31 22:55:02,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 1.988888888888889) internal successors, (179), 89 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:55:02,969 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 186 transitions. [2022-01-31 22:55:02,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-01-31 22:55:02,970 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:55:02,970 INFO L514 BasicCegarLoop]: trace histogram [87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:55:02,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-01-31 22:55:02,970 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:55:02,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:55:02,970 INFO L85 PathProgramCache]: Analyzing trace with hash -781206705, now seen corresponding path program 87 times [2022-01-31 22:55:02,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:55:02,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [196263024] [2022-01-31 22:55:02,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:55:02,972 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:55:02,972 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:55:02,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:55:02,972 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:55:02,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:55:04,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:55:04,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:55:04,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:55:04,576 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:55:04,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [196263024] [2022-01-31 22:55:04,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [196263024] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:55:04,576 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:55:04,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-01-31 22:55:04,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469124178] [2022-01-31 22:55:04,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:55:04,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-01-31 22:55:04,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:55:04,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-01-31 22:55:04,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4007, Invalid=4183, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 22:55:04,578 INFO L87 Difference]: Start difference. First operand 186 states and 186 transitions. Second operand has 91 states, 91 states have (on average 1.989010989010989) internal successors, (181), 90 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:55:06,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:55:06,652 INFO L93 Difference]: Finished difference Result 194 states and 194 transitions. [2022-01-31 22:55:06,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-01-31 22:55:06,653 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 1.989010989010989) internal successors, (181), 90 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 185 [2022-01-31 22:55:06,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:55:06,653 INFO L225 Difference]: With dead ends: 194 [2022-01-31 22:55:06,653 INFO L226 Difference]: Without dead ends: 189 [2022-01-31 22:55:06,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3915 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=12015, Invalid=19847, Unknown=0, NotChecked=0, Total=31862 [2022-01-31 22:55:06,655 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 183 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:55:06,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 48 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:55:06,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-01-31 22:55:06,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 188. [2022-01-31 22:55:06,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 183 states have (on average 1.005464480874317) internal successors, (184), 183 states have internal predecessors, (184), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:55:06,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 188 transitions. [2022-01-31 22:55:06,703 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 188 transitions. Word has length 185 [2022-01-31 22:55:06,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:55:06,703 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 188 transitions. [2022-01-31 22:55:06,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 1.989010989010989) internal successors, (181), 90 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:55:06,703 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 188 transitions. [2022-01-31 22:55:06,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-01-31 22:55:06,704 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:55:06,704 INFO L514 BasicCegarLoop]: trace histogram [88, 88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:55:06,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-01-31 22:55:06,704 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:55:06,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:55:06,704 INFO L85 PathProgramCache]: Analyzing trace with hash 2014994157, now seen corresponding path program 88 times [2022-01-31 22:55:06,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:55:06,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [790267815] [2022-01-31 22:55:06,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:55:06,705 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:55:06,705 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:55:06,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:55:06,706 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:55:06,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:55:08,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:55:08,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:55:08,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:55:08,245 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:55:08,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [790267815] [2022-01-31 22:55:08,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [790267815] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:55:08,245 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:55:08,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-01-31 22:55:08,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616074314] [2022-01-31 22:55:08,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:55:08,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-01-31 22:55:08,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:55:08,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-01-31 22:55:08,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2022-01-31 22:55:08,247 INFO L87 Difference]: Start difference. First operand 188 states and 188 transitions. Second operand has 92 states, 92 states have (on average 1.9891304347826086) internal successors, (183), 91 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:55:10,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:55:10,370 INFO L93 Difference]: Finished difference Result 196 states and 196 transitions. [2022-01-31 22:55:10,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-01-31 22:55:10,370 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 1.9891304347826086) internal successors, (183), 91 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 187 [2022-01-31 22:55:10,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:55:10,371 INFO L225 Difference]: With dead ends: 196 [2022-01-31 22:55:10,371 INFO L226 Difference]: Without dead ends: 191 [2022-01-31 22:55:10,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4004 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=12285, Invalid=20295, Unknown=0, NotChecked=0, Total=32580 [2022-01-31 22:55:10,372 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 185 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:55:10,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 43 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:55:10,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-01-31 22:55:10,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 190. [2022-01-31 22:55:10,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 185 states have (on average 1.0054054054054054) internal successors, (186), 185 states have internal predecessors, (186), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:55:10,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 190 transitions. [2022-01-31 22:55:10,420 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 190 transitions. Word has length 187 [2022-01-31 22:55:10,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:55:10,421 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 190 transitions. [2022-01-31 22:55:10,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 1.9891304347826086) internal successors, (183), 91 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:55:10,421 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 190 transitions. [2022-01-31 22:55:10,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-01-31 22:55:10,421 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:55:10,421 INFO L514 BasicCegarLoop]: trace histogram [89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:55:10,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-01-31 22:55:10,422 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:55:10,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:55:10,422 INFO L85 PathProgramCache]: Analyzing trace with hash 514495243, now seen corresponding path program 89 times [2022-01-31 22:55:10,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:55:10,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1063680801] [2022-01-31 22:55:10,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:55:10,423 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:55:10,423 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:55:10,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:55:10,424 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:55:10,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:55:12,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:55:12,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:55:12,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:55:12,308 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:55:12,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1063680801] [2022-01-31 22:55:12,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1063680801] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:55:12,308 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:55:12,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-01-31 22:55:12,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3825178] [2022-01-31 22:55:12,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:55:12,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-01-31 22:55:12,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:55:12,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-01-31 22:55:12,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4188, Invalid=4368, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 22:55:12,310 INFO L87 Difference]: Start difference. First operand 190 states and 190 transitions. Second operand has 93 states, 93 states have (on average 1.989247311827957) internal successors, (185), 92 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:55:14,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:55:14,471 INFO L93 Difference]: Finished difference Result 198 states and 198 transitions. [2022-01-31 22:55:14,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-01-31 22:55:14,475 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 1.989247311827957) internal successors, (185), 92 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 189 [2022-01-31 22:55:14,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:55:14,475 INFO L225 Difference]: With dead ends: 198 [2022-01-31 22:55:14,475 INFO L226 Difference]: Without dead ends: 193 [2022-01-31 22:55:14,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4094 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=12558, Invalid=20748, Unknown=0, NotChecked=0, Total=33306 [2022-01-31 22:55:14,477 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 187 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:55:14,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 43 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:55:14,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-01-31 22:55:14,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 192. [2022-01-31 22:55:14,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 187 states have (on average 1.0053475935828877) internal successors, (188), 187 states have internal predecessors, (188), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:55:14,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 192 transitions. [2022-01-31 22:55:14,538 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 192 transitions. Word has length 189 [2022-01-31 22:55:14,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:55:14,538 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 192 transitions. [2022-01-31 22:55:14,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 1.989247311827957) internal successors, (185), 92 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:55:14,539 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 192 transitions. [2022-01-31 22:55:14,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-01-31 22:55:14,539 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:55:14,539 INFO L514 BasicCegarLoop]: trace histogram [90, 90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:55:14,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2022-01-31 22:55:14,539 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:55:14,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:55:14,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1644050345, now seen corresponding path program 90 times [2022-01-31 22:55:14,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:55:14,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [399742765] [2022-01-31 22:55:14,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:55:14,541 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:55:14,541 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:55:14,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:55:14,542 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:55:14,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:55:16,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:55:16,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:55:16,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:55:16,243 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:55:16,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [399742765] [2022-01-31 22:55:16,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [399742765] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:55:16,243 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:55:16,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-01-31 22:55:16,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660498781] [2022-01-31 22:55:16,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:55:16,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-01-31 22:55:16,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:55:16,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-01-31 22:55:16,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4280, Invalid=4462, Unknown=0, NotChecked=0, Total=8742 [2022-01-31 22:55:16,245 INFO L87 Difference]: Start difference. First operand 192 states and 192 transitions. Second operand has 94 states, 94 states have (on average 1.9893617021276595) internal successors, (187), 93 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:55:18,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:55:18,857 INFO L93 Difference]: Finished difference Result 200 states and 200 transitions. [2022-01-31 22:55:18,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-01-31 22:55:18,859 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 1.9893617021276595) internal successors, (187), 93 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 191 [2022-01-31 22:55:18,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:55:18,860 INFO L225 Difference]: With dead ends: 200 [2022-01-31 22:55:18,860 INFO L226 Difference]: Without dead ends: 195 [2022-01-31 22:55:18,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4185 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=12834, Invalid=21206, Unknown=0, NotChecked=0, Total=34040 [2022-01-31 22:55:18,861 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 189 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 22:55:18,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 38 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 22:55:18,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-01-31 22:55:18,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 194. [2022-01-31 22:55:18,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 189 states have (on average 1.0052910052910053) internal successors, (190), 189 states have internal predecessors, (190), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:55:18,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 194 transitions. [2022-01-31 22:55:18,929 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 194 transitions. Word has length 191 [2022-01-31 22:55:18,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:55:18,929 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 194 transitions. [2022-01-31 22:55:18,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 1.9893617021276595) internal successors, (187), 93 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:55:18,929 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 194 transitions. [2022-01-31 22:55:18,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-01-31 22:55:18,930 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:55:18,930 INFO L514 BasicCegarLoop]: trace histogram [91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:55:18,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2022-01-31 22:55:18,930 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:55:18,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:55:18,931 INFO L85 PathProgramCache]: Analyzing trace with hash 519777479, now seen corresponding path program 91 times [2022-01-31 22:55:18,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:55:18,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [944808861] [2022-01-31 22:55:18,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:55:18,932 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:55:18,932 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:55:18,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:55:18,933 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:55:18,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:55:21,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:55:21,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:55:21,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:55:21,282 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:55:21,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [944808861] [2022-01-31 22:55:21,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [944808861] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:55:21,282 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:55:21,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-01-31 22:55:21,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269891179] [2022-01-31 22:55:21,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:55:21,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-01-31 22:55:21,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:55:21,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-01-31 22:55:21,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4373, Invalid=4557, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 22:55:21,284 INFO L87 Difference]: Start difference. First operand 194 states and 194 transitions. Second operand has 95 states, 95 states have (on average 1.9894736842105263) internal successors, (189), 94 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:55:23,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:55:23,407 INFO L93 Difference]: Finished difference Result 202 states and 202 transitions. [2022-01-31 22:55:23,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-01-31 22:55:23,407 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 1.9894736842105263) internal successors, (189), 94 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 193 [2022-01-31 22:55:23,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:55:23,408 INFO L225 Difference]: With dead ends: 202 [2022-01-31 22:55:23,408 INFO L226 Difference]: Without dead ends: 197 [2022-01-31 22:55:23,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4277 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=13113, Invalid=21669, Unknown=0, NotChecked=0, Total=34782 [2022-01-31 22:55:23,410 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 191 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:55:23,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 53 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:55:23,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-01-31 22:55:23,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 196. [2022-01-31 22:55:23,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 191 states have (on average 1.0052356020942408) internal successors, (192), 191 states have internal predecessors, (192), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:55:23,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 196 transitions. [2022-01-31 22:55:23,461 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 196 transitions. Word has length 193 [2022-01-31 22:55:23,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:55:23,462 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 196 transitions. [2022-01-31 22:55:23,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 1.9894736842105263) internal successors, (189), 94 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:55:23,462 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 196 transitions. [2022-01-31 22:55:23,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-01-31 22:55:23,462 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:55:23,462 INFO L514 BasicCegarLoop]: trace histogram [92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:55:23,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2022-01-31 22:55:23,463 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:55:23,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:55:23,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1869655451, now seen corresponding path program 92 times [2022-01-31 22:55:23,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:55:23,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2028557266] [2022-01-31 22:55:23,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:55:23,464 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:55:23,464 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:55:23,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:55:23,465 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:55:23,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:55:25,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:55:25,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:55:25,217 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 22:55:25,217 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:55:25,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2028557266] [2022-01-31 22:55:25,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2028557266] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:55:25,217 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:55:25,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-01-31 22:55:25,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016205299] [2022-01-31 22:55:25,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:55:25,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-01-31 22:55:25,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:55:25,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-01-31 22:55:25,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2022-01-31 22:55:25,220 INFO L87 Difference]: Start difference. First operand 196 states and 196 transitions. Second operand has 96 states, 96 states have (on average 1.9895833333333333) internal successors, (191), 95 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:55:27,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:55:27,598 INFO L93 Difference]: Finished difference Result 204 states and 204 transitions. [2022-01-31 22:55:27,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-01-31 22:55:27,598 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.9895833333333333) internal successors, (191), 95 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 195 [2022-01-31 22:55:27,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:55:27,599 INFO L225 Difference]: With dead ends: 204 [2022-01-31 22:55:27,599 INFO L226 Difference]: Without dead ends: 199 [2022-01-31 22:55:27,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4370 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=13395, Invalid=22137, Unknown=0, NotChecked=0, Total=35532 [2022-01-31 22:55:27,601 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 193 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:55:27,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 38 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:55:27,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-01-31 22:55:27,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 198. [2022-01-31 22:55:27,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 193 states have (on average 1.005181347150259) internal successors, (194), 193 states have internal predecessors, (194), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:55:27,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 198 transitions. [2022-01-31 22:55:27,662 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 198 transitions. Word has length 195 [2022-01-31 22:55:27,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:55:27,662 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 198 transitions. [2022-01-31 22:55:27,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.9895833333333333) internal successors, (191), 95 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:55:27,663 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 198 transitions. [2022-01-31 22:55:27,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-01-31 22:55:27,663 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:55:27,663 INFO L514 BasicCegarLoop]: trace histogram [93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:55:27,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2022-01-31 22:55:27,663 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:55:27,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:55:27,664 INFO L85 PathProgramCache]: Analyzing trace with hash -307197821, now seen corresponding path program 93 times [2022-01-31 22:55:27,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:55:27,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [635824294] [2022-01-31 22:55:27,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:55:27,667 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:55:27,667 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:55:27,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:55:27,669 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:55:27,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:55:29,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:55:29,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:55:29,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:55:29,373 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:55:29,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [635824294] [2022-01-31 22:55:29,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [635824294] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:55:29,373 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:55:29,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-01-31 22:55:29,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877172799] [2022-01-31 22:55:29,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:55:29,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-01-31 22:55:29,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:55:29,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-01-31 22:55:29,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4562, Invalid=4750, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 22:55:29,375 INFO L87 Difference]: Start difference. First operand 198 states and 198 transitions. Second operand has 97 states, 97 states have (on average 1.9896907216494846) internal successors, (193), 96 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:55:31,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:55:31,576 INFO L93 Difference]: Finished difference Result 206 states and 206 transitions. [2022-01-31 22:55:31,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-31 22:55:31,576 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.9896907216494846) internal successors, (193), 96 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 197 [2022-01-31 22:55:31,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:55:31,577 INFO L225 Difference]: With dead ends: 206 [2022-01-31 22:55:31,577 INFO L226 Difference]: Without dead ends: 201 [2022-01-31 22:55:31,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4464 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=13680, Invalid=22610, Unknown=0, NotChecked=0, Total=36290 [2022-01-31 22:55:31,580 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 195 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:55:31,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 23 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:55:31,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-01-31 22:55:31,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 200. [2022-01-31 22:55:31,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 195 states have (on average 1.005128205128205) internal successors, (196), 195 states have internal predecessors, (196), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:55:31,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 200 transitions. [2022-01-31 22:55:31,651 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 200 transitions. Word has length 197 [2022-01-31 22:55:31,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:55:31,652 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 200 transitions. [2022-01-31 22:55:31,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.9896907216494846) internal successors, (193), 96 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:55:31,652 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 200 transitions. [2022-01-31 22:55:31,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-01-31 22:55:31,652 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:55:31,653 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:55:31,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2022-01-31 22:55:31,653 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:55:31,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:55:31,653 INFO L85 PathProgramCache]: Analyzing trace with hash -2023968991, now seen corresponding path program 94 times [2022-01-31 22:55:31,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:55:31,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [834432784] [2022-01-31 22:55:31,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:55:31,655 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:55:31,656 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:55:31,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:55:31,656 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:55:31,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:55:33,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:55:33,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:55:33,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:55:33,912 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:55:33,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [834432784] [2022-01-31 22:55:33,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [834432784] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:55:33,912 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:55:33,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-01-31 22:55:33,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413597202] [2022-01-31 22:55:33,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:55:33,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-01-31 22:55:33,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:55:33,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-01-31 22:55:33,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 22:55:33,916 INFO L87 Difference]: Start difference. First operand 200 states and 200 transitions. Second operand has 98 states, 98 states have (on average 1.989795918367347) internal successors, (195), 97 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:55:36,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:55:36,409 INFO L93 Difference]: Finished difference Result 208 states and 208 transitions. [2022-01-31 22:55:36,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-01-31 22:55:36,410 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.989795918367347) internal successors, (195), 97 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 199 [2022-01-31 22:55:36,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:55:36,410 INFO L225 Difference]: With dead ends: 208 [2022-01-31 22:55:36,410 INFO L226 Difference]: Without dead ends: 203 [2022-01-31 22:55:36,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4559 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=13968, Invalid=23088, Unknown=0, NotChecked=0, Total=37056 [2022-01-31 22:55:36,412 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 197 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:55:36,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 43 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:55:36,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-01-31 22:55:36,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 202. [2022-01-31 22:55:36,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 197 states have (on average 1.0050761421319796) internal successors, (198), 197 states have internal predecessors, (198), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:55:36,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 202 transitions. [2022-01-31 22:55:36,475 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 202 transitions. Word has length 199 [2022-01-31 22:55:36,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:55:36,475 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 202 transitions. [2022-01-31 22:55:36,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 1.989795918367347) internal successors, (195), 97 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:55:36,475 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 202 transitions. [2022-01-31 22:55:36,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-01-31 22:55:36,475 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:55:36,476 INFO L514 BasicCegarLoop]: trace histogram [95, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:55:36,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2022-01-31 22:55:36,476 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:55:36,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:55:36,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1721345599, now seen corresponding path program 95 times [2022-01-31 22:55:36,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:55:36,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [224433681] [2022-01-31 22:55:36,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:55:36,478 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:55:36,478 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:55:36,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:55:36,478 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:55:36,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:55:38,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:55:38,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:55:38,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:55:38,269 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:55:38,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [224433681] [2022-01-31 22:55:38,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [224433681] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:55:38,269 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:55:38,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-01-31 22:55:38,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155858175] [2022-01-31 22:55:38,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:55:38,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-01-31 22:55:38,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:55:38,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-01-31 22:55:38,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4755, Invalid=4947, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 22:55:38,271 INFO L87 Difference]: Start difference. First operand 202 states and 202 transitions. Second operand has 99 states, 99 states have (on average 1.9898989898989898) internal successors, (197), 98 states have internal predecessors, (197), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:55:40,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:55:40,801 INFO L93 Difference]: Finished difference Result 210 states and 210 transitions. [2022-01-31 22:55:40,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-01-31 22:55:40,801 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.9898989898989898) internal successors, (197), 98 states have internal predecessors, (197), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 201 [2022-01-31 22:55:40,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:55:40,802 INFO L225 Difference]: With dead ends: 210 [2022-01-31 22:55:40,802 INFO L226 Difference]: Without dead ends: 205 [2022-01-31 22:55:40,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4655 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=14259, Invalid=23571, Unknown=0, NotChecked=0, Total=37830 [2022-01-31 22:55:40,804 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 199 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:55:40,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 53 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:55:40,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-01-31 22:55:40,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 204. [2022-01-31 22:55:40,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 199 states have (on average 1.0050251256281406) internal successors, (200), 199 states have internal predecessors, (200), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:55:40,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 204 transitions. [2022-01-31 22:55:40,863 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 204 transitions. Word has length 201 [2022-01-31 22:55:40,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:55:40,863 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 204 transitions. [2022-01-31 22:55:40,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.9898989898989898) internal successors, (197), 98 states have internal predecessors, (197), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:55:40,863 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 204 transitions. [2022-01-31 22:55:40,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-01-31 22:55:40,880 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:55:40,880 INFO L514 BasicCegarLoop]: trace histogram [96, 96, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:55:40,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2022-01-31 22:55:40,881 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:55:40,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:55:40,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1786072541, now seen corresponding path program 96 times [2022-01-31 22:55:40,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:55:40,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1602448253] [2022-01-31 22:55:40,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:55:40,883 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:55:40,883 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:55:40,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:55:40,884 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:55:40,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:55:43,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:55:43,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:55:43,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:55:43,118 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:55:43,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1602448253] [2022-01-31 22:55:43,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1602448253] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:55:43,118 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:55:43,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-01-31 22:55:43,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398965493] [2022-01-31 22:55:43,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:55:43,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-01-31 22:55:43,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:55:43,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-01-31 22:55:43,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2022-01-31 22:55:43,119 INFO L87 Difference]: Start difference. First operand 204 states and 204 transitions. Second operand has 100 states, 100 states have (on average 1.99) internal successors, (199), 99 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:55:45,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:55:45,586 INFO L93 Difference]: Finished difference Result 212 states and 212 transitions. [2022-01-31 22:55:45,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-01-31 22:55:45,587 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 1.99) internal successors, (199), 99 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 203 [2022-01-31 22:55:45,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:55:45,587 INFO L225 Difference]: With dead ends: 212 [2022-01-31 22:55:45,587 INFO L226 Difference]: Without dead ends: 207 [2022-01-31 22:55:45,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4752 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=14553, Invalid=24059, Unknown=0, NotChecked=0, Total=38612 [2022-01-31 22:55:45,590 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 201 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:55:45,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 23 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:55:45,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-01-31 22:55:45,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 206. [2022-01-31 22:55:45,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 201 states have (on average 1.0049751243781095) internal successors, (202), 201 states have internal predecessors, (202), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:55:45,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 206 transitions. [2022-01-31 22:55:45,649 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 206 transitions. Word has length 203 [2022-01-31 22:55:45,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:55:45,649 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 206 transitions. [2022-01-31 22:55:45,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 1.99) internal successors, (199), 99 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:55:45,649 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 206 transitions. [2022-01-31 22:55:45,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-01-31 22:55:45,650 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:55:45,650 INFO L514 BasicCegarLoop]: trace histogram [97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:55:45,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2022-01-31 22:55:45,650 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:55:45,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:55:45,650 INFO L85 PathProgramCache]: Analyzing trace with hash -435845637, now seen corresponding path program 97 times [2022-01-31 22:55:45,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:55:45,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1221478801] [2022-01-31 22:55:45,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:55:45,651 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:55:45,652 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:55:45,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:55:45,652 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:55:45,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:55:47,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:55:47,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:55:47,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:55:47,851 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:55:47,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1221478801] [2022-01-31 22:55:47,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1221478801] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:55:47,851 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:55:47,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-01-31 22:55:47,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114892821] [2022-01-31 22:55:47,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:55:47,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-01-31 22:55:47,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:55:47,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-01-31 22:55:47,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4952, Invalid=5148, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 22:55:47,854 INFO L87 Difference]: Start difference. First operand 206 states and 206 transitions. Second operand has 101 states, 101 states have (on average 1.99009900990099) internal successors, (201), 100 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:55:50,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:55:50,339 INFO L93 Difference]: Finished difference Result 214 states and 214 transitions. [2022-01-31 22:55:50,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-01-31 22:55:50,339 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.99009900990099) internal successors, (201), 100 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 205 [2022-01-31 22:55:50,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:55:50,341 INFO L225 Difference]: With dead ends: 214 [2022-01-31 22:55:50,341 INFO L226 Difference]: Without dead ends: 209 [2022-01-31 22:55:50,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4850 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=14850, Invalid=24552, Unknown=0, NotChecked=0, Total=39402 [2022-01-31 22:55:50,345 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 203 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:55:50,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 33 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:55:50,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-01-31 22:55:50,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 208. [2022-01-31 22:55:50,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 203 states have (on average 1.0049261083743843) internal successors, (204), 203 states have internal predecessors, (204), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:55:50,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 208 transitions. [2022-01-31 22:55:50,419 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 208 transitions. Word has length 205 [2022-01-31 22:55:50,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:55:50,419 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 208 transitions. [2022-01-31 22:55:50,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.99009900990099) internal successors, (201), 100 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:55:50,419 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 208 transitions. [2022-01-31 22:55:50,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-01-31 22:55:50,420 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:55:50,420 INFO L514 BasicCegarLoop]: trace histogram [98, 98, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:55:50,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2022-01-31 22:55:50,420 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:55:50,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:55:50,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1100468583, now seen corresponding path program 98 times [2022-01-31 22:55:50,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:55:50,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1236203323] [2022-01-31 22:55:50,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:55:50,424 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:55:50,424 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:55:50,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:55:50,426 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:55:50,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:55:52,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:55:52,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:55:52,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:55:52,910 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:55:52,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1236203323] [2022-01-31 22:55:52,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1236203323] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:55:52,911 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:55:52,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2022-01-31 22:55:52,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101032249] [2022-01-31 22:55:52,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:55:52,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-01-31 22:55:52,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:55:52,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-01-31 22:55:52,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2022-01-31 22:55:52,913 INFO L87 Difference]: Start difference. First operand 208 states and 208 transitions. Second operand has 102 states, 102 states have (on average 1.9901960784313726) internal successors, (203), 101 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:55:55,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:55:55,790 INFO L93 Difference]: Finished difference Result 216 states and 216 transitions. [2022-01-31 22:55:55,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-01-31 22:55:55,790 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 1.9901960784313726) internal successors, (203), 101 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 207 [2022-01-31 22:55:55,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:55:55,791 INFO L225 Difference]: With dead ends: 216 [2022-01-31 22:55:55,791 INFO L226 Difference]: Without dead ends: 211 [2022-01-31 22:55:55,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4949 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=15150, Invalid=25050, Unknown=0, NotChecked=0, Total=40200 [2022-01-31 22:55:55,793 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 205 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:55:55,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 33 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:55:55,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-01-31 22:55:55,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 210. [2022-01-31 22:55:55,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 205 states have (on average 1.0048780487804878) internal successors, (206), 205 states have internal predecessors, (206), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:55:55,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 210 transitions. [2022-01-31 22:55:55,869 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 210 transitions. Word has length 207 [2022-01-31 22:55:55,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:55:55,870 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 210 transitions. [2022-01-31 22:55:55,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 1.9901960784313726) internal successors, (203), 101 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:55:55,870 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 210 transitions. [2022-01-31 22:55:55,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-01-31 22:55:55,870 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:55:55,870 INFO L514 BasicCegarLoop]: trace histogram [99, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:55:55,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2022-01-31 22:55:55,871 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:55:55,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:55:55,871 INFO L85 PathProgramCache]: Analyzing trace with hash 147007415, now seen corresponding path program 99 times [2022-01-31 22:55:55,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:55:55,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [60228732] [2022-01-31 22:55:55,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:55:55,872 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:55:55,872 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:55:55,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:55:55,873 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:55:55,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:55:58,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:55:58,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:55:58,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:55:58,013 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:55:58,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [60228732] [2022-01-31 22:55:58,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [60228732] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:55:58,013 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:55:58,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2022-01-31 22:55:58,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136593377] [2022-01-31 22:55:58,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:55:58,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-01-31 22:55:58,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:55:58,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-01-31 22:55:58,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 22:55:58,016 INFO L87 Difference]: Start difference. First operand 210 states and 210 transitions. Second operand has 103 states, 103 states have (on average 1.9902912621359223) internal successors, (205), 102 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:56:00,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:56:00,715 INFO L93 Difference]: Finished difference Result 217 states and 217 transitions. [2022-01-31 22:56:00,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-01-31 22:56:00,715 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 1.9902912621359223) internal successors, (205), 102 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 209 [2022-01-31 22:56:00,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:56:00,716 INFO L225 Difference]: With dead ends: 217 [2022-01-31 22:56:00,716 INFO L226 Difference]: Without dead ends: 212 [2022-01-31 22:56:00,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5049 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=15453, Invalid=25553, Unknown=0, NotChecked=0, Total=41006 [2022-01-31 22:56:00,718 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 206 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:56:00,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 63 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:56:00,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-01-31 22:56:00,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2022-01-31 22:56:00,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 207 states have (on average 1.0048309178743962) internal successors, (208), 207 states have internal predecessors, (208), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:56:00,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 212 transitions. [2022-01-31 22:56:00,786 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 212 transitions. Word has length 209 [2022-01-31 22:56:00,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:56:00,786 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 212 transitions. [2022-01-31 22:56:00,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 1.9902912621359223) internal successors, (205), 102 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:56:00,786 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 212 transitions. [2022-01-31 22:56:00,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-01-31 22:56:00,790 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:56:00,790 INFO L514 BasicCegarLoop]: trace histogram [100, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:56:00,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2022-01-31 22:56:00,790 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:56:00,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:56:00,791 INFO L85 PathProgramCache]: Analyzing trace with hash 675565909, now seen corresponding path program 100 times [2022-01-31 22:56:00,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:56:00,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [579388081] [2022-01-31 22:56:00,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:56:00,792 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:56:00,792 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:56:00,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:56:00,792 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:56:00,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-31 22:56:00,824 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-01-31 22:56:00,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-31 22:56:00,887 INFO L133 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2022-01-31 22:56:00,888 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-01-31 22:56:00,890 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-01-31 22:56:00,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2022-01-31 22:56:00,893 INFO L732 BasicCegarLoop]: Path program histogram: [100, 1, 1] [2022-01-31 22:56:00,895 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-31 22:56:00,929 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 10:56:00 BoogieIcfgContainer [2022-01-31 22:56:00,929 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-31 22:56:00,930 INFO L158 Benchmark]: Toolchain (without parser) took 203150.75ms. Allocated memory was 196.1MB in the beginning and 339.7MB in the end (delta: 143.7MB). Free memory was 143.9MB in the beginning and 245.0MB in the end (delta: -101.0MB). Peak memory consumption was 43.5MB. Max. memory is 8.0GB. [2022-01-31 22:56:00,930 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 196.1MB. Free memory was 160.1MB in the beginning and 160.0MB in the end (delta: 89.8kB). There was no memory consumed. Max. memory is 8.0GB. [2022-01-31 22:56:00,930 INFO L158 Benchmark]: CACSL2BoogieTranslator took 205.94ms. Allocated memory is still 196.1MB. Free memory was 143.7MB in the beginning and 170.2MB in the end (delta: -26.5MB). Peak memory consumption was 9.8MB. Max. memory is 8.0GB. [2022-01-31 22:56:00,930 INFO L158 Benchmark]: Boogie Preprocessor took 29.01ms. Allocated memory is still 196.1MB. Free memory was 170.2MB in the beginning and 168.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-01-31 22:56:00,930 INFO L158 Benchmark]: RCFGBuilder took 201.63ms. Allocated memory is still 196.1MB. Free memory was 168.6MB in the beginning and 158.7MB in the end (delta: 10.0MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-01-31 22:56:00,930 INFO L158 Benchmark]: TraceAbstraction took 202709.74ms. Allocated memory was 196.1MB in the beginning and 339.7MB in the end (delta: 143.7MB). Free memory was 158.1MB in the beginning and 245.0MB in the end (delta: -86.8MB). Peak memory consumption was 57.9MB. Max. memory is 8.0GB. [2022-01-31 22:56:00,931 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 196.1MB. Free memory was 160.1MB in the beginning and 160.0MB in the end (delta: 89.8kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 205.94ms. Allocated memory is still 196.1MB. Free memory was 143.7MB in the beginning and 170.2MB in the end (delta: -26.5MB). Peak memory consumption was 9.8MB. Max. memory is 8.0GB. * Boogie Preprocessor took 29.01ms. Allocated memory is still 196.1MB. Free memory was 170.2MB in the beginning and 168.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 201.63ms. Allocated memory is still 196.1MB. Free memory was 168.6MB in the beginning and 158.7MB in the end (delta: 10.0MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 202709.74ms. Allocated memory was 196.1MB in the beginning and 339.7MB in the end (delta: 143.7MB). Free memory was 158.1MB in the beginning and 245.0MB in the end (delta: -86.8MB). Peak memory consumption was 57.9MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 12]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 27, overapproximation of someBinaryArithmeticDOUBLEoperation at line 22. Possible FailurePath: [L16] double x0, x1, x2; [L17] int i; [L19] x0 = 11. / 2. [L20] x1 = 61. / 11. [L21] i = 0 [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND FALSE !(i < 100) [L27] CALL __VERIFIER_assert(x0 >= 99. && x0 <= 101.) [L12] COND TRUE !(cond) [L12] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 202.6s, OverallIterations: 102, TraceHistogramMax: 100, PathProgramHistogramMax: 100, EmptinessCheckTime: 0.1s, AutomataDifference: 107.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 10811 SdHoareTripleChecker+Valid, 8.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 10810 mSDsluCounter, 3597 SdHoareTripleChecker+Invalid, 7.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2478 mSDsCounter, 5669 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 12677 IncrementalHoareTripleChecker+Invalid, 18346 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 5669 mSolverCounterUnsat, 1119 mSDtfsCounter, 12677 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 10504 GetRequests, 303 SyntacticMatches, 0 SemanticMatches, 10201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171600 ImplicationChecksByTransitivity, 177.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=212occurred in iteration=101, InterpolantAutomatonStates: 5353, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.7s AutomataMinimizationTime, 101 MinimizatonAttempts, 99 StatesRemovedByMinimization, 99 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-01-31 22:56:00,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...